Compact, sunlight-avoiding imaging device for vehicle

Abstract

This imaging device for a vehicle comprises: an image formation device which is disposed inside a dashboard of the vehicle and forms an optical signal on one side; a concave mirror disposed spaced apart from the PGU to transmit the optical signal; a first flat mirror disposed spaced apart from the concave mirror in a first direction to reflect the transmitted optical signal; and a second flat mirror disposed spaced apart from the concave mirror in a second direction opposite to the first direction to reflect, toward the concave mirror, a second optical signal which is the reflected optical signal re-transmitted through the concave mirror.

Description

A compact, solar-avoiding vehicle imaging device

[0001] This specification relates to a vehicle imaging device. More specifically, it relates to a volume-reduced vehicle imaging device that avoids sunlight.

[0002] A vehicle is a device that allows the user to move in the desired direction. A representative example is an automobile.

[0003] Meanwhile, various sensors and electronic devices are being installed in vehicles to enhance the convenience of users. In particular, research is actively being conducted on Advanced Driver Assistance Systems (ADAS) to enhance user convenience. Furthermore, development of autonomous vehicles is also actively underway.

[0004] Meanwhile, in-vehicle displays, which display various driving information, are often located below the driver's forward field of vision, potentially affecting driving safety due to rubbernecking. Therefore, recent vehicle-mounted video devices, such as head-up displays (HUDs), can be installed in vehicles to ensure driving safety by projecting images onto the windshield, closer to the driver's field of vision.

[0005] Additionally, there is a need to provide a vehicle video device that displays driving-related information in the front area of ​​the driver's seat of the vehicle or provides personal entertainment content in the front area of ​​the passenger seat or rear seat of the vehicle.

[0006] Meanwhile, while the optical signals needed to display images are output to the windshield, the ambient sunlight must travel outside the vehicle's occupant's field of vision. Therefore, to avoid direct and reflected sunlight, a reflective structure within the vehicle must redirect the sunlight outside the occupant's field of vision.

[0007] In this regard, US20120224062A1 discloses a problem in that an optical signal emitted from a light source travels through a flat mirror and a curved mirror toward the user's field of vision. Meanwhile, sunlight outside the windshield is reflected by the curved mirror and travels toward the user's field of vision. Furthermore, the vehicle imaging device disclosed in US20120224062A1 has a problem in that its height along the Z-axis increases, resulting in an increase in volume.

[0008] Meanwhile, the vehicle imaging device of Patent No. 10-1909374 is formed with a structure of first and second planar mirrors and a concave mirror arranged adjacently, so that the height along the Z-axis can be reduced. However, a back reflection phenomenon of sunlight may occur between the first and second planar mirrors and the image forming device.

[0009] Therefore, if the spacing between optical components is reduced to the maximum to reduce volume, restrictions are placed on the angles and positions of the optical components, and sunlight reflection inevitably occurs. In other words, if volume is reduced solely by adjusting the spacing and position between components, there is the problem that sunlight reflection occurs and the volume reduction effect is also minimal.

[0010] The purpose of this specification is to provide a vehicle imaging device designed to reduce volume while avoiding sunlight from a driver's field of vision, and a vehicle equipped with the same.

[0011] In addition, the present specification aims to avoid field of view defects caused by sunlight in a HUD structure that has a small volume while reducing the height of the entire structure.

[0012] The purpose of this specification is to defocus the reflected sunlight to avoid thermal damage to the display and driver glare caused by the reflected light.

[0013] The purpose of this specification is to provide a customized design of an in-vehicle imaging device according to the limited space inside the vehicle based on avoidance of field of view defects caused by sunlight.

[0014] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

[0015] In order to achieve the above object, a vehicle imaging device according to one aspect of the present specification is disposed inside a dashboard of a vehicle and includes a picture generation unit (PGU) for forming an optical signal on one side; a concave mirror disposed spaced apart from the PGU so as to transmit the optical signal; a first flat mirror disposed spaced apart from the concave mirror in a first direction so as to reflect the transmitted optical signal; and a second flat mirror disposed spaced apart from the concave mirror in a second direction opposite to the first direction so that the reflected optical signal reflects a second optical signal that has passed through the concave mirror again and is directed toward the concave mirror.

[0016] According to an embodiment, the vehicle imaging device may include a cover that forms the exterior of the dashboard and through which a second optical signal transmitted through the second flat mirror passes. The second optical signal passing through the cover may display an image on a specific area of ​​the windshield and may proceed to the user's eyebox region.

[0017] According to an embodiment, the concave mirror may have a polarizing film attached thereto so as to transmit a first polarization component and reflect a second polarization component. The first flat mirror may have a first polarizing film attached thereto so as to reflect the first polarization component and transmit the second polarization component.

[0018] In an embodiment, the second flat mirror may include a phase retarder that converts the first polarization component into a first circular polarization component; and a second polarizing film attached to reflect the first polarization component and transmit the second polarization component.

[0019] In an embodiment, the concave mirror transmits the optical signal of the first polarization component emitted from the PGU, the first flat mirror to which the first polarizing film is attached reflects the transmitted optical signal of the first polarization component, and the concave mirror can transmit the reflected optical signal of the first polarization component again. The second flat mirror to which the phase retarder and the second polarizing film are attached converts the polarization of the second optical signal of the first polarization component and reflects it as a second optical signal of the second polarization component, and the concave mirror reflects the second optical signal of the second polarization component, and the reflected second optical signal of the second polarization component can transmit the second flat mirror and pass through the cover.

[0020] In an embodiment, the PGU may be arranged at an inclination angle greater than 90 degrees with respect to a horizontal plane, the first flat mirror may be arranged at a first inclination angle greater than 90 degrees with respect to the horizontal plane, and the second flat mirror may be arranged at a second inclination angle greater than 90 degrees with respect to the horizontal plane. The concave mirror may be arranged at a third inclination angle greater than 90 degrees with respect to the horizontal plane. The cover may be arranged at a fourth inclination angle less than 90 degrees with respect to the horizontal plane.

[0021] According to an embodiment, the second tilt angle of the second flat mirror is greater than the first tilt angle of the first flat mirror and greater than the third tilt angle of the concave mirror.

[0022] According to an embodiment, the second flat mirror may be arranged in an upper region in the Z-axis direction than the first flat mirror. The first length of the first flat mirror may be formed to be longer than the second length of the second flat mirror. The third length of the concave mirror may be formed to be longer than the first length of the first flat mirror.

[0023] According to an embodiment, the second optical signal inside the windshield can propagate toward the center point of the eyebox area at an incident angle less than 90 degrees with respect to the horizontal plane. Sunlight outside the windshield can pass through the windshield and the cover at a second incident angle greater than the incident angle with respect to the horizontal plane and be multi-reflected in the space between the concave mirror and the first flat mirror. The multi-reflected sunlight in the space can propagate toward a lower area in the Z-axis direction inside the dashboard.

[0024] According to an embodiment, the invention may further include a motor coupled to the back surface of the second flat mirror and configured to adjust the second tilt angle of the second flat mirror.

[0025] According to another aspect of the present disclosure, a vehicle imaging device is disposed inside a dashboard of a vehicle, and includes a picture generation unit (PGU) that forms an optical signal on one side; a flat mirror disposed spaced apart from the PGU in a first direction so as to transmit the optical signal; a concave mirror disposed spaced apart from the flat mirror in the first direction so as to reflect the transmitted optical signal; and a cover that forms an exterior of the dashboard and through which a second optical signal transmitted through the flat mirror after being multiply reflected between the concave mirror and the flat mirror passes. The second optical signal that passes through the cover can display an image on a specific region of a windshield and advance to an eyebox region of a user.

[0026] In an embodiment, the flat mirror may include a phase retarder that converts the first polarization component into a first circular polarization component; and a polarizing film attached thereto so as to transmit the first polarization component and reflect the second polarization component. The concave mirror may be configured to reflect all polarization components.

[0027] According to an embodiment, the flat mirror to which the phase retarder and the polarizing film are attached can transmit the optical signal of the first polarization component and convert it into an optical signal of the second polarization component. The concave mirror can reflect the optical signal of the second polarization component, and the flat mirror can reflect the optical signal of the second polarization component reflected from the concave mirror. The concave mirror can re-reflect the optical signal of the second polarization component reflected from the flat mirror to form a second optical signal of the second polarization component, and the second optical signal of the second polarization component can transmit the flat mirror and pass through the cover.

[0028] In an embodiment, the PGU may be arranged at an inclination angle greater than 90 degrees with respect to the horizontal plane, and the flat mirror may be arranged at a first inclination angle greater than 90 degrees with respect to the horizontal plane. The concave mirror may be arranged at a second inclination angle greater than 90 degrees with respect to the horizontal plane. The cover may be arranged at a third inclination angle less than 90 degrees with respect to the horizontal plane.

[0029] According to an embodiment, the first tilt angle of the flat mirror may be formed to be greater than the tilt angle of the PGU. The second tilt angle of the concave mirror may be formed to be greater than the tilt angle of the PGU.

[0030] According to an embodiment, the flat mirror may be positioned in an upper region in the Z-axis direction than the concave mirror. The first length of the flat mirror may be formed to be longer than the length of the PGU. The second length of the concave mirror may be formed to be longer than the length of the PGU.

[0031] According to an embodiment, the second optical signal inside the windshield can propagate to the center point of the eyebox area at an incident angle less than 90 degrees with respect to the horizontal plane. Sunlight outside the windshield can pass through the windshield and the cover at a second incident angle greater than the incident angle with respect to the horizontal plane and be multi-reflected in the space between the concave mirror and the flat mirror. The multi-reflected sunlight in the space can propagate toward a lower area in the Z-axis direction inside the dashboard.

[0032] According to an embodiment, the vehicle imaging device may further include a mirror bench structure disposed in an area between the cover and the windshield, and reflecting sunlight passing through the windshield to pass through the cover.

[0033] Specific details of other embodiments are included in the detailed description and drawings.

[0034] The technical features of a vehicle imaging device having a reduced volume according to the present specification and a vehicle equipped with the same can be summarized as follows.

[0035] According to the present specification, a volume-reduced vehicle imaging device can be implemented by arranging first and second flat mirrors on one side and the other side of a concave mirror inside a cover of a dashboard to avoid sunlight.

[0036] According to the present specification, a vehicle imaging device can be implemented that guarantees a field of view (FOV) of a certain angle or more in a reduced volume according to a limited mounting space through a multi-reflective structure by configuring some mirrors to reflect or transmit optical signals.

[0037] According to the present specification, a volume-reduced vehicle imaging device can be implemented that avoids sunlight by forming a mirror structure to allow sunlight to be multi-reflected and thereby allow sunlight passing through a windshield to proceed to a lower area of ​​the vehicle.

[0038] According to the present specification, a volume-reduced vehicle imaging device capable of avoiding sunlight and having freedom in the angle and position of optical components can be implemented through a space secured by overlapping optical paths using two or more selective transmitting / reflecting optical components.

[0039] According to the present specification, a volume-reduced vehicle imaging device capable of avoiding sunlight and having a structure without back reflection while implementing volume reduction can be implemented.

[0040] The effects of this specification are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0041] FIG. 1 is a drawing showing the exterior of a vehicle according to an embodiment of the present specification.

[0042] FIG. 2 is a drawing of a vehicle according to an embodiment of the present specification viewed from various external angles.

[0043] Figures 3 and 4 are drawings showing the interior of a vehicle according to an embodiment of the present specification.

[0044] FIG. 5 is a block diagram for reference in explaining a vehicle according to an embodiment of the present specification.

[0045] Figure 6a shows a configuration in which a screen of a predetermined ratio is formed in a specific area of ​​the windshield of a vehicle.

[0046] Fig. 6b shows a structure in which a vehicle video device for implementing a screen of a predetermined ratio of Fig. 6a is placed inside a vehicle dashboard.

[0047] FIG. 7 illustrates a vehicle imaging device placed inside a dashboard of a vehicle according to an embodiment of the present specification.

[0048] Figure 8 compares the placement areas according to the mirror placement structure in a vehicle imaging device.

[0049] Fig. 9 shows a structure in which the first structure of the vehicle imaging device of Fig. 8(a) is combined with internal components inside the vehicle.

[0050] Fig. 10 shows a structure in which a motor is coupled to the second flat mirror of the vehicle imaging device of Fig. 8(a) and Fig. 9 and a structure in which an optical signal is transmitted and reflected.

[0051] Figure 11 shows the arrangement structure of a vehicle imaging device having a curved cover and a structure through which optical signals are transmitted and reflected.

[0052] FIG. 12 is a diagram showing polarization conversion of light signals transmitted and reflected from concave mirrors and flat mirrors in the vehicle imaging device of FIGS. 10 and 11.

[0053] FIG. 13 shows the arrangement structure of a vehicle imaging device that can be placed inside a dashboard of a vehicle according to an embodiment of the present specification and the structure through which an optical signal is transmitted and reflected.

[0054] Figure 14 shows the polarization components of an optical signal that is multiple-reflected and transmitted between the concave mirror and the flat mirror of Figure 12.

[0055] Figure 15 shows a structure in which sunlight outside the windshield of the vehicle imaging device of Figure 13 passes through the cover and is multi-reflected inside the dashboard.

[0056] Fig. 16 shows a block diagram of a vehicle equipped with a vehicle imaging device according to the present specification.

[0057] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components will be given the same reference numbers and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably only for the convenience of writing the specification, and do not in themselves have distinct meanings or roles. In addition, when describing the embodiments disclosed in this specification, if it is determined that a specific description of a related known technology may obscure the gist of the embodiments disclosed in this specification, a detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

[0058] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0059] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0060] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0061] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0062] The vehicle described in this specification may include a concept that includes automobiles and motorcycles. In the following, the vehicle will be described primarily with automobiles.

[0063] The vehicle described in this specification may be a concept that includes all types of vehicles, such as internal combustion engine vehicles equipped with an engine as a power source, hybrid vehicles equipped with an engine and an electric motor as a power source, and electric vehicles equipped with an electric motor as a power source.

[0064] In the following description, the left side of the vehicle means the left side of the vehicle's driving direction, and the right side of the vehicle means the right side of the vehicle's driving direction.

[0065] FIG. 1 is a drawing showing the exterior of a vehicle according to an embodiment of the present specification.

[0066] FIG. 2 is a drawing of a vehicle according to an embodiment of the present specification viewed from various external angles.

[0067] Figures 3 and 4 are drawings showing the interior of a vehicle according to an embodiment of the present specification.

[0068] FIG. 5 is a block diagram for reference in explaining a vehicle according to an embodiment of the present specification.

[0069] Referring to FIGS. 1 to 5, the vehicle (100) may include wheels that rotate by a power source and a steering input device (510) for controlling the direction of travel of the vehicle (100).

[0070] The vehicle (100) may be an autonomous vehicle.

[0071] The vehicle (100) can be switched to autonomous driving mode or manual mode based on user input.

[0072] For example, the vehicle (100) can be switched from manual mode to autonomous driving mode or from autonomous driving mode to manual mode based on user input received through the user interface device (200).

[0073] The vehicle (100) can be switched to autonomous driving mode or manual mode based on driving situation information. The driving situation information can be generated based on object information provided by the object detection device (300).

[0074] For example, the vehicle (100) can be switched from manual mode to autonomous driving mode or from autonomous driving mode to manual mode based on driving situation information generated by the object detection device (300).

[0075] For example, the vehicle (100) can be switched from manual mode to autonomous driving mode or from autonomous driving mode to manual mode based on driving situation information received through the communication device (400).

[0076] The vehicle (100) can be switched from manual mode to autonomous driving mode or from autonomous driving mode to manual mode based on information, data, and signals provided from an external device.

[0077] When the vehicle (100) is operated in autonomous driving mode, the autonomous vehicle (100) can be operated based on the driving system (700).

[0078] For example, an autonomous vehicle (100) may be driven based on information, data, or signals generated from a driving system (710), an exit system (740), or a parking system (750).

[0079] When the vehicle (100) is driven in manual mode, the autonomous vehicle (100) can receive user input for driving through the driving control device (500). Based on the user input received through the driving control device (500), the vehicle (100) can be driven.

[0080] The overall length refers to the length from the front to the rear of the vehicle (100), the overall width refers to the width of the vehicle (100), and the overall height refers to the length from the bottom of the wheel to the roof. In the following description, the overall length direction (L) may refer to the direction that serves as a reference for measuring the overall length of the vehicle (100), the overall width direction (W) may refer to the direction that serves as a reference for measuring the overall width of the vehicle (100), and the overall height direction (H) may refer to the direction that serves as a reference for measuring the overall height of the vehicle (100).

[0081] As illustrated in FIG. 5, the vehicle (100) may include a user interface device (200), an object detection device (300), a communication device (400), a driving operation device (500), a vehicle driving device (600), a driving system (700), a navigation system (770), a sensing unit (120), an interface unit (130), a memory (140), a control unit (170), and a power supply unit (190).

[0082] Depending on the embodiment, the vehicle (100) may include other components in addition to the components described herein, or may not include some of the components described herein.

[0083] The user interface device (200) is a device for communication between a vehicle (100) and a user. The user interface device (200) can receive user input and provide information generated in the vehicle (100) to the user. The vehicle (100) can implement a UI (User Interface) or UX (User Experience) through the user interface device (200).

[0084] The user interface device (200) may include an input unit (210), an internal camera (220), a biometric detection unit (230), an output unit (250), and a processor (270).

[0085] Depending on the embodiment, the user interface device (200) may include additional components other than the described components, or may not include some of the described components.

[0086] The input unit (200) is for receiving information from a user, and data collected from the input unit (120) can be analyzed by a processor (270) and processed into a user's control command.

[0087] The input unit (200) may be placed inside the vehicle. For example, the input unit (200) may be placed in an area of ​​a steering wheel, an area of ​​an instrument panel, an area of ​​a seat, an area of ​​each pillar, an area of ​​a door, an area of ​​a center console, an area of ​​a head lining, an area of ​​a sun visor, an area of ​​a windshield, or an area of ​​a window.

[0088] The input unit (200) may include a voice input unit (211), a gesture input unit (212), a touch input unit (213), and a mechanical input unit (214).

[0089] The voice input unit (211) can convert a user's voice input into an electrical signal. The converted electrical signal can be provided to a processor (270) or a control unit (170).

[0090] The voice input unit (211) may include one or more microphones.

[0091] The gesture input unit (212) can convert a user's gesture input into an electrical signal. The converted electrical signal can be provided to a processor (270) or a control unit (170).

[0092] The gesture input unit (212) may include at least one of an infrared sensor and an image sensor for detecting a user's gesture input.

[0093] According to an embodiment, the gesture input unit (212) may detect a user's three-dimensional gesture input. To this end, the gesture input unit (212) may include a light output unit that outputs a plurality of infrared lights or a plurality of image sensors.

[0094] The gesture input unit (212) can detect a user's 3D gesture input through a TOF (Time of Flight) method, a structured light method, or a disparity method.

[0095] The touch input unit (213) can convert a user's touch input into an electrical signal. The converted electrical signal can be provided to a processor (270) or a control unit (170).

[0096] The touch input unit (213) may include a touch sensor for detecting a user's touch input.

[0097] According to an embodiment, the touch input unit (213) may be formed integrally with the display unit (251), thereby implementing a touch screen. Such a touch screen may provide both an input interface and an output interface between the vehicle (100) and the user.

[0098] The mechanical input unit (214) may include at least one of a button, a dome switch, a jog wheel, and a jog switch. An electrical signal generated by the mechanical input unit (214) may be provided to a processor (270) or a control unit (170).

[0099] The mechanical input unit (214) can be placed on a steering wheel, center fascia, center console, cockpit module, door, etc.

[0100] The internal camera (220) can capture images of the vehicle interior. The processor (270) can detect the user's status based on the images of the vehicle interior. The processor (270) can obtain information about the user's gaze from the images of the vehicle interior. The processor (270) can detect the user's gestures from the images of the vehicle interior.

[0101] The biometric detection unit (230) can obtain the user's biometric information. The biometric detection unit (230) includes a sensor capable of obtaining the user's biometric information, and can use the sensor to obtain the user's fingerprint information, heartbeat information, etc. The biometric information can be used for user authentication.

[0102] The output unit (250) is for generating output related to vision, hearing, or touch.

[0103] The output unit (250) may include at least one of a display unit (251), an audio output unit (252), and a haptic output unit (253).

[0104] The display unit (251) can display graphic objects corresponding to various information.

[0105] The display unit (251) may include at least one of a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display, a 3D display, and an e-ink display.

[0106] The display unit (251) can implement a touch screen by forming a mutual layer structure with the touch input unit (213) or forming it as an integral part.

[0107] The display unit (251) may be implemented as a HUD (Head Up Display), a CID (Center Information Display), a cluster, and / or an RSE (Rear Seat Entertainment). When the display unit (251) is implemented as a HUD, the display unit (251) may be equipped with a projection module to output information through an image projected onto a windshield or window.

[0108] The display unit (251) may include a transparent display. The transparent display may be attached to a windshield or window.

[0109] A transparent display can display a predetermined screen while having a predetermined transparency. To have transparency, the transparent display may include at least one of a transparent TFEL (Thin Film Electroluminescent), a transparent OLED (Organic Light-Emitting Diode), a transparent LCD (Liquid Crystal Display), a transmissive transparent display, and a transparent LED (Light Emitting Diode) display. The transparency of the transparent display can be adjusted.

[0110] Meanwhile, the user interface device (200) may include a plurality of display units (251a to 251g).

[0111] The display unit (251) may be arranged in one area of ​​the steering wheel, one area of ​​the instrument panel (521a, 251b, 251e), one area of ​​the seat (251d), one area of ​​each pillar (251f), one area of ​​the door (251g), one area of ​​the center console, one area of ​​the head lining, one area of ​​the sun visor, or may be implemented in one area of ​​the windshield (251c), one area of ​​the window (251h).

[0112] Driving-related information for the driver may be displayed in one area (251a, 251b) of the instrument panel. A personalized infotainment display for a passenger seated in the front passenger seat may be implemented in one area (251e) of the instrument panel using a vehicle-mounted video device. A personalized infotainment display for RSE (Rear Seat Entertainment) may be implemented in one area (251d) of the seat using a vehicle-mounted video device.

[0113] The audio output unit (252) converts an electric signal provided from the processor (270) or the control unit (170) into an audio signal and outputs the converted signal. To this end, the audio output unit (252) may include one or more speakers.

[0114] The haptic output unit (253) generates a tactile output. For example, the haptic output unit (253) can operate by vibrating a steering wheel, a seat belt, or a seat (110FL, 110FR, 110RL, 110RR) so that the user can perceive the output.

[0115] The processor (270) can control the overall operation of each unit of the user interface device (200).

[0116] Depending on the embodiment, the user interface device (200) may include a plurality of processors (270) or may not include a processor (270).

[0117] If the user interface device (200) does not include a processor (270), the user interface device (200) may be operated under the control of a processor or control unit (170) of another device in the vehicle (100).

[0118] Meanwhile, the user interface device (200) may be referred to as a vehicle display device.

[0119] The user interface device (200) can be operated under the control of the control unit (170).

[0120] The object detection device (300) is a device for detecting an object located outside a vehicle (100).

[0121] Objects may be various objects related to the operation of the vehicle (100).

[0122] Meanwhile, a vehicle imaging device according to this specification is described. In this regard, the vehicle display, which displays various driving information, is located below the driver's forward driving field of vision, which can affect driving safety (rubber necking). Therefore, vehicle imaging devices, such as recent HUDs (Head-up displays), can be installed in vehicles to ensure driving safety by projecting images onto the windshield near the driver's field of vision.

[0123] Additionally, an infotainment device needs to be implemented in the passenger or rear seat of a vehicle to provide personal information and entertainment content. Therefore, a vehicle-mounted video device is needed to display driving-related information in the area in front of the driver's seat or to provide personal entertainment content in the area in front of the passenger or rear seat.

[0124] To display such driving-related information or entertainment content on a specific area of ​​the windshield at the front of the vehicle, the width in one direction must be a certain percentage greater than the length in the other direction, creating a large aspect ratio. The problem is that there is no specific provision regarding where in the vehicle the vehicle-mounted video device can be installed and how it can be structured to accommodate such a large aspect ratio.

[0125] To address these issues, the present disclosure provides a vehicle imaging device having a large aspect ratio using a vehicle-related projection optical system. Furthermore, the present disclosure displays driving-related information on a screen having a large aspect ratio on a specific area of ​​a windshield in front of a vehicle. Furthermore, the present disclosure provides a vehicle imaging device having an optical structure and a special screen for enabling an image to have a large aspect ratio in a single imaging module. Furthermore, the present disclosure implements a continuous image associated with driving-related information in a single imaging module so that the image has a large aspect ratio. Furthermore, the present disclosure provides a vehicle imaging device having a small and thin volume.

[0126] A vehicle imaging device for achieving the aforementioned purpose is described in detail with reference to drawings. In this regard, Fig. 6a illustrates a configuration in which a screen of a predetermined aspect ratio is formed on a specific area of ​​a vehicle's windshield. Fig. 6b illustrates a structure in which a vehicle imaging device for implementing the screen of Fig. 6a of a predetermined aspect ratio is positioned within the vehicle's dashboard.

[0127] Referring to FIG. 6A, an image having a width (Wa) in one axis direction and a length (La) in the other axis direction may be displayed on a specific area (251R) of a windshield of a vehicle. The image may be configured to include a plurality of image areas on which information necessary for driving the vehicle is displayed. The plurality of image areas may include a first image area (IR1) to a third image area (IR3). A first image including vehicle-related information may be displayed on the first image area (IR1) closest to the field of vision of a driver of the vehicle. A second image related to a vehicle driving route may be displayed on the second image area (IR2). A third image related to a map including a starting point and a destination may be displayed on the third image area (IR3). As a plurality of images are displayed on the specific area (251R), the width (Wa) in one axis direction may be set to a predetermined ratio, for example, 5 times or more, than the length (La) in the other axis direction.

[0128] Referring to FIGS. 6A and 6B, a vehicle imaging device (1000) may be placed inside a dashboard of a vehicle. The vehicle imaging device (1000) may be placed in a specific area inside the dashboard so as not to overlap with an area where a steering wheel and pedals are placed. An image reflected by light from a screen panel (1200) constituting the vehicle imaging device (1000) may be displayed on a specific area (251R) of a windshield of the vehicle. The specific area (251R) may be implemented with a predetermined length (La) so that the image is displayed within the driver's field of vision. The distance from the center of the driver's line of sight to the center of the specific area (251R) may be implemented with a predetermined distance (Da).

[0129] In this regard, a vehicle imaging device positioned within a vehicle dashboard according to an embodiment of the present disclosure is described. In this regard, Fig. 7 illustrates a vehicle imaging device positioned within a vehicle dashboard according to an embodiment of the present disclosure. Meanwhile, Fig. 8 compares the placement areas of a vehicle imaging device according to the mirror arrangement structure.

[0130] Referring to FIG. 7, a vehicle imaging device (1000) may be configured to include a picture generation unit (PGU) (1100), a concave mirror (1310), and a first flat mirror (1320). The concave mirror (1310) may be positioned in a first region adjacent to the picture generation unit (PGU) (1100). The first flat mirror (1320) may be positioned in a second region spaced apart from the concave mirror (1310).

[0131] The concave mirror (1310) may include a concave mirror region (1311) having a concave shape and a polarizing film (1312) disposed in the concave mirror region (1311). The polarizing film (1312) may also be formed in a concave shape to correspond to the concave shape of the concave mirror region (1311). The first flat mirror (1320) may include a first flat mirror region (1321) having a flat shape and a first polarizing film (1322) disposed in the first flat mirror region (1321). The first polarizing film (1322) may also be formed in a flat shape to correspond to the flat shape of the first flat mirror region (1321).

[0132] An optical signal emitted from an image forming unit (PGU) (1100) at a wide angle within a predetermined angular range can pass through a concave mirror (1310) and be reflected from a first flat mirror (1320). The optical signal emitted from the image forming unit (PGU) (1100) can be reflected through the entire area of ​​the first flat mirror (1320). The optical signal reflected from the first flat mirror (1320) can be reflected through the entire area of ​​the concave mirror (1310). The optical signal reflected through the concave mirror (1310) can form an optical signal area within a predetermined range (Dx) to display an image.

[0133] FIG. 8(a) is a first structure of a vehicle imaging device (1000) in which a photo-forming unit (PGU) (1100), a concave mirror (1310), a first flat mirror (1320), and a second flat mirror (1330) are arranged in a first region (1010R) inside a cover (1010). An optical signal emitted from the photo-forming unit (PGU) (1100) passes through the concave mirror (1310) and is reflected by the first flat mirror (1320). An optical signal reflected by the first flat mirror (1320) passes through the concave mirror (1310) and is reflected by the second flat mirror (1330). The light signal reflected from the second flat mirror (1330) is reflected from the concave mirror (1310) and passes through the second flat mirror (1330) and the cover (1010) to be directed to the windshield (250). The HUD image directed to the windshield (250) is displayed in the user's eye-box area.

[0134] FIG. 8(b) is a second structure of a vehicle imaging device (1000b) in which a picture forming unit (PGU) (1100), a concave mirror (1310-2), and a flat mirror (1330-2) are arranged in a second region (1020R) inside a cover (1010). An optical signal emitted from the picture forming unit (PGU) (1100) is reflected by the flat mirror (1330-2). The optical signal reflected by the flat mirror (1330-2) is reflected by the concave mirror (1310-2), passes through the cover (1010), and is directed to the windshield (250). The HUD image directed to the windshield (250) is displayed in the user's eye-box area.

[0135] The first structure of the vehicle imaging device (1000) of FIG. 8(a) in which the first and second flat mirrors (1320, 1330) are arranged on one side and the other side of the concave mirror (1310) is arranged in the first region (1010R) inside the cover (1010), thereby reducing the volume. On the other hand, the second structure of the vehicle imaging device (1000b) of FIG. 8(b) in which the concave mirror (1310-2) and the flat mirror (1330-2) are arranged on one side and the other side of the image forming unit (PGU) (1100) is arranged in the second region (1010R) inside the cover (1010), thereby increasing the volume. The volume of the second region (1010R) of the second structure of the vehicle imaging device (1000b) increases compared to the volume of the first region (1010R) inside the first structure of the vehicle imaging device (1000).

[0136] Accordingly, the first structure of the vehicle imaging device (1000) of FIG. 8(a) can maximize the volume reduction effect by implementing the overlap of the optical path using polarization with two parts instead of one. In this regard, the volume reduction effect can be maximized because the overlap of the optical path using polarization occurs in the area between the concave mirror (1310) and the second flat mirror (1330). In addition, since the arrangement angles between the optical components are parallel, the sunlight does not face upward when reflected, thereby providing the effect of avoiding back reflection.

[0137] FIG. 9 illustrates a structure in which the first structure of the vehicle imaging device of FIG. 8(a) is coupled with internal components inside the vehicle. Referring to FIGS. 8 and 9, the first structure of the vehicle imaging device (1000) is arranged within a first region (1010R) inside the cover (1010), thereby reducing the volume compared to the second structure arranged within a second region (1020R) inside the cover (1010).

[0138] A vehicle frame (1040), a brake structure (1050), and a steering wheel structure (1060) may be arranged in a third region (1030R), which is an external region of a first region (1010R). The first frame (1040) of the vehicle is a frame formed so that a vehicle imaging device (1000) can be assembled within the vehicle. The frame (1040) may be a frame that is coupled to one side of a body that forms the exterior of the vehicle imaging device (1000) formed in the first region (1010R). Since the frame (1040) is coupled to a HUD corresponding to the vehicle imaging device, it may be referred to as a HUD frame.

[0139] Meanwhile, at least one mirror of the vehicle imaging device according to the present specification may be coupled with a motor so that its arrangement angle can be changed. In this regard, FIG. 10 illustrates a structure in which a motor is coupled to the second flat mirror of the vehicle imaging device of FIG. 8(a) and FIG. 9, and a structure in which an optical signal is transmitted and reflected.

[0140] Referring to FIG. 8(a), FIG. 9, and FIG. 10, a vehicle imaging device (1000) may be configured to include a picture forming unit (PGU) (1100), a concave mirror (1310), a first flat mirror (1320), and a second flat mirror (1330). The vehicle imaging device (1000) may further be configured to include a cover (1010) and a windshield (250).

[0141] A concave mirror (1310) may be placed in a first region adjacent to the image forming unit (PGU) (1100) in one direction. A first flat mirror (1320) may be placed in a second region spaced apart from the concave mirror (1310) in one direction. A second flat mirror (1330) may be placed in a region adjacent to the image forming unit (PGU) (1100) in the upper direction of the z-axis.

[0142] An optical signal emitted from a picture forming unit (PGU) (1100) may pass through a concave mirror (1310) and be reflected from a first flat mirror (1320). The optical signal reflected from the first flat mirror (1320) may be reflected from a second flat mirror (1330) and a concave mirror (1310). The optical signal reflected from the concave mirror (1310) may pass through the second flat mirror (1330) and the cover (1010) to steer the windshield (250) to display an image. Accordingly, an image of the optical signal steered from the windshield (250) may be displayed in a user's eye box area.

[0143] Meanwhile, the cover of the vehicle imaging device according to the present specification may be formed with a curved structure. In this regard, Fig. 11 illustrates the arrangement structure of a vehicle imaging device having a curved cover and a structure through which optical signals are transmitted and reflected. Fig. 12 is a diagram illustrating polarization conversion of optical signals transmitted and reflected by concave mirrors and flat mirrors in the vehicle imaging device of Figs. 10 and 11.

[0144] Referring to FIGS. 10 and 12, a vehicle imaging device (1000) may be configured to include a picture forming unit (PGU) (1100), a concave mirror (1310), a first flat mirror (1320), and a second flat mirror (1330). The vehicle imaging device (1000) may further be configured to include a cover (1010b) formed in a curved shape and a windshield (250).

[0145] A vehicle imaging device (1000) may be placed within a first region (1010R) inside a cover (1010b). An image forming unit (PGU) (1100), a concave mirror (1310), a first flat mirror (1320), and a second flat mirror (1330) may be placed within the internal region (1000R) of the cover (1010b).

[0146] A concave mirror (1310) may be placed in a first region adjacent to the image forming unit (PGU) (1100) in one direction. A first flat mirror (1320) may be placed in a second region spaced apart from the concave mirror (1310) in one direction. A second flat mirror (1330) may be placed in a region adjacent to the image forming unit (PGU) (1100) in the upper direction of the z-axis.

[0147] An optical signal emitted from a picture forming unit (PGU) (1100) may pass through a concave mirror (1310) and be reflected from a first flat mirror (1320). The optical signal reflected from the first flat mirror (1320) may be reflected from a second flat mirror (1330) and a concave mirror (1310). The optical signal reflected from the concave mirror (1310) may pass through the second flat mirror (1330) and a curved cover (1010b) to steer the windshield (250) to display an image. Accordingly, an image of the optical signal steered to the windshield (250) may be displayed in an eye box area of ​​a user. As the optical signal passes through the curved cover (1010b), an image area of ​​the optical signal displayed on the windshield (250) may be changed.

[0148] In this regard, the image area of ​​the optical signal displayed on the windshield (250) may be changed to narrow or expand as the optical signal passes through the curved cover (1010b). In the cover (1010b) whose center is formed to be concave on the z-axis more than its periphery, the image area of ​​the optical signal may expand compared to a planar cover. On the other hand, in the cover whose center is formed to be convex on the z-axis more than its periphery, the image area of ​​the optical signal may narrow compared to a planar cover.

[0149] Referring to FIG. 13(a), an optical signal emitted from a picture forming unit (PGU) (1100) may pass through a concave mirror (1310), be reflected from a first plane mirror (1320), and pass through the concave mirror (1320). The optical signal that passes through the concave mirror (1310), is reflected from the first plane mirror (1320), and passes through the concave mirror (1320) may be in an S-polarized state. The optical signal in an S-polarized state may be reflected from a second plane mirror (1330) and converted into an optical signal in a P-polarized state. The optical signal in an P-polarized state reflected from the second plane mirror (1330) may be reflected from the concave mirror (1310) and pass through the second plane mirror (1330). The optical signal in an P-polarized state may be converted into an optical signal in an S-polarized state by passing through the second plane mirror (1330).

[0150] FIG. 13(b) is an enlarged view of a portion of the second flat mirror (1330) of FIG. 13(a). Referring to FIG. 13(b), the second flat mirror (1330) may be configured to include a phase retarder (1331) and a second polarizing film (1332). Referring to FIG. 12, the phase retarder (1331) may be configured to convert a first polarization component into a first circularly polarized component. The phase retarder (1331) may be implemented as a quarter-wave plate (QWP) that converts the first polarization component (e.g., S-polarization) into a first circularly polarized component (e.g., left-handed circularly polarized). The first circularly polarized component may be reflected from a reflective surface (1330R) of the second flat mirror (1330) and converted into a second circularly polarized component (e.g., right-handed circularly polarized). The reflected second circular polarization component can be converted back into a second polarization component (e.g., P-polarization) by passing through the phase retarder (1331).

[0151] Hereinafter, a vehicle imaging device (1000) according to the present specification will be described with reference to FIGS. 7 to 13. The image forming unit (PGU) (1100) of the vehicle imaging device (1000) may be implemented as projection devices. The vehicle imaging device (1000) may be configured to include a cover (1010), an image forming unit (PGU) (1100), a concave mirror (1310), a first flat mirror (1320), and a second flat mirror (1330).

[0152] An image forming unit (PGU) (1100) may be disposed inside a dashboard (1001) of a vehicle. The image forming unit (1100) may be disposed to form an optical signal to one side. The image forming unit (1100) includes various projection devices and a display that displays pixels on a screen. The image forming unit (1100) may be implemented with a liquid crystal display (LCD), an organic light-emitting diode (OLED), a digital light processing (DLP), a liquid crystal on silicon (LCoS), or a micro light-emitting diode (micro LED). The image forming unit (PGU) (1100) includes various projection devices and a display that displays pixels on a screen. Image rays emitted by the image forming unit (PGU) (1100) may be output as linearly polarized signals.

[0153] A concave mirror (1310) may be disposed spaced apart from the PGU (1100) to transmit an optical signal from the PGU (1100). A polarizing film (1312) may be disposed on at least one surface of the concave mirror (1310). The polarizing film (1312) may be formed to selectively transmit or reflect an optical signal from the PGU (1100) depending on the polarization component of the optical signal. A polarizing film (1312) having a coating or linear polarization may be applied to enable the concave mirror (1310) to selectively transmit / reflect.

[0154] The first flat mirror (1320) may be spaced apart from the concave mirror (1310) in the first direction of the X-axis to reflect the transmitted light signal. A linear polarizing coating, film, or mirror coating may be applied to the first flat mirror (1320) to reflect the transmitted light signal from the concave mirror (1310).

[0155] The second flat mirror (1330) may be arranged so that the light signal reflected from the first flat mirror (1320) reflects the second light signal that has passed through the concave mirror (1310) again. The second flat mirror (1330) may be arranged so that the second light signal reflected from the concave mirror (1310) is spaced apart from the concave mirror (1310) in the second direction of the X-axis so that the second light signal is directed toward the concave mirror (1310). The second direction of the X-axis corresponds to the positive X-axis direction, which is the opposite direction to the negative X-axis direction, which is the first direction of the X-axis. A half-mirror structure may be applied to the concave mirror (1310) and the second flat mirror (1330) to enable selective transmission / reflection.

[0156] The cover (1010) can form the exterior (front) of the dashboard (1001). The cover (1010) can be implemented as a dust cover that can prevent foreign substances, dust, etc. from entering from the outside. The cover (1010) is not limited to a flat structure. Accordingly, the cover can also be formed into a curved structure to avoid back reflection of external sunlight, depending on the mirror bench configuration provided by the OEM.

[0157] The cover (1010) may be formed of a non-metallic dielectric material to allow a second optical signal reflected from the concave mirror (1310) and transmitted through the second flat mirror (1330) to pass therethrough. The second optical signal passing through the cover (1010) may display an image on a specific region (251R) of the windshield (250) and advance to the user's eyebox region.

[0158] A concave mirror (1310) may have a polarizing film (1312) attached thereto so as to transmit a first polarization component and reflect a second polarization component. For example, the first polarization component may be an S-polarization component and the second polarization component may be a P-polarization component, but is not limited thereto and may be any different orthogonal polarization components. A first flat mirror (1320) may have a first polarizing film (1322) attached thereto so as to reflect the first polarization component and transmit the second polarization component.

[0159] The second flat mirror (1330) may be configured to include a phase retarder (1331) and a second polarizing film (1332). The phase retarder (1331) may be configured to convert a first polarization component into a first circularly polarized component. The phase retarder (1331) may be implemented as a quarter-wave plate (QWP) that converts the first polarization component (e.g., S-polarization) into a first circularly polarized component (e.g., left-hand circular polarization). The first circularly polarized component may be reflected from a reflective surface (1330R) of the second flat mirror (1330) and converted into a second circularly polarized component (e.g., right-hand circular polarization). The reflected second circularly polarized component may be converted into a second polarization component (e.g., P-polarization) while passing through the phase retarder (1331).

[0160] The second polarizing film (1332) may be attached so as to reflect one of the first and second polarization components and transmit the other component. The second polarizing film (1332) may be attached so as to reflect the first polarization component and transmit the second polarization component. The second polarizing film (1332) may be attached between the second flat mirror (1330) and the phase retarder (1331).

[0161] The concave mirror (1310) can transmit the light signal of the first polarization component emitted from the PGU (1100). The first flat mirror (1320) to which the first polarization film (1322) is attached can reflect the transmitted light signal of the first polarization component. As another example, the first flat mirror (1320) can be implemented without the polarization film so as to reflect the light signal of all polarization components.

[0162] A concave mirror (1310) to which a polarizing film (1311) is attached can retransmit the reflected light signal of the first polarization component. A second flat mirror (1320) to which a phase retarder (1331) and a second polarizing film (1332) are attached can convert the polarization of the light signal of the first polarization component and reflect a second light signal of the second polarization component.

[0163] As described above, the phase retarder (1331) may be implemented as a quarter-wave plate (QWP) that converts a first polarization component (e.g., S-polarization) into a first circularly polarized component (e.g., left-hand circular polarization). The first circularly polarized component may be reflected from a reflective surface (1330R) of a second flat mirror (1330) and converted into a second circularly polarized component (e.g., right-hand circular polarization). The reflected second circularly polarized component may be converted into a second polarization component (e.g., P-polarization) while passing through the phase retarder (1331).

[0164] A concave mirror (1310) having a polarizing film (1311) attached thereto can reflect a second optical signal of a second polarization component. The reflected second optical signal of the second polarization component can pass through the cover (1010) by transmitting through the second flat mirror (1330) having a second polarizing film (1332) attached thereto.

[0165] The PGU (1100) can be arranged at an inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). The first flat mirror (1320) can be arranged at a first inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). The second flat mirror (1330) can be arranged at a second inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). The concave mirror (1310) can be arranged at a third inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). Accordingly, the length of the vehicle imaging device (1000) including the PGU (1100), the concave mirror (1310), the first flat mirror (1320), and the second flat mirror (1330) on the X-axis can be reduced, thereby reducing the overall volume.

[0166] The cover (1010, 1010b) can be arranged at a fourth inclination angle less than 90 degrees with respect to the horizontal plane (X-axis). In this regard, the cover (1010) can be implemented as a straight-line cross-sectional shape as in FIG. 10, or the cover (1010b) can be implemented as a curved (streamlined) cross-sectional shape as in FIG. 11.

[0167] The second tilt angle of the second flat mirror (1320) is formed to be larger than the first tilt angle of the first flat mirror (1320), so that the length on the X-axis between the first and second flat mirrors (1320, 1330) can be reduced. The second tilt angle of the second flat mirror (1320) is formed to be larger than the third tilt angle of the concave mirror (1320), so that the multiple reflection paths of the optical signal can be shortened. In addition, the second tilt angle of the second flat mirror (1320) is formed to be larger than the third tilt angle of the concave mirror (1320), so that sunlight entering the interior of the dashboard (1001) can be directed to a lower area on the Z-axis of the dashboard (1001).

[0168] The second flat mirror (1330) may be arranged in a higher region in the Z-axis direction than the first flat mirror (1320). In this regard, the PGU (1100) may be arranged in a lower region of the second flat mirror (1330). The optical signal of the PGU (1100) may be reflected from the first flat mirror (1320) in the lower region in the Z-axis direction, transmitted through the concave mirror (1310), and reflected from the second flat mirror (1330) in the upper region in the Z-axis direction. Therefore, by arranging the first and second flat mirrors (1320, 1330) only in desired regions, it is possible to prevent undesired reflection components caused by some reflection components in the concave mirror (1310).

[0169] The second length (L2) of the second flat mirror (1330) may be formed longer than the first length (L1) of the first flat mirror (1320). Since the first flat mirror (1320) is formed with a single reflection structure, it is formed with the shortest first length (L1). Since the second flat mirror (1330) is formed with a reflection and transmission structure depending on the polarization component, it is formed with a second length (L2) that is longer than the first length (L1). The third length (L3) of the concave mirror (1310) may be formed longer than the second length (L2) of the second flat mirror (1330). Since the concave mirror (1310) is formed with a multiple transmission structure and a single reflection structure, it is formed with the longest third length (L3).

[0170] A vehicle equipped with a vehicle imaging device according to the present specification may have a windshield (250) placed on the vehicle frame to protect the driver from the external environment and secure a field of view. The position of each optical component of the vehicle imaging device may be changed depending on the installation space of the windshield (250) and the HUD, and the virtual image distance and FOV may also be changed as required. The windshield (250) may be formed to have a wedge structure capable of reducing double images according to the LDA.

[0171] A vehicle imaging device according to the present specification is formed with a sunlight avoidance structure. In this regard, the steering of a second optical signal inside a windshield (250) and sunlight outside the windshield (250) will be described. The second optical signal inside the windshield (250) can travel to the center point of the eye-box area at an incident angle of the X-axis less than 90 degrees with respect to the horizontal plane. The sunlight outside the windshield (250) passes through the windshield (250) and the cover (1001) at a second incident angle greater than the incident angle with respect to the horizontal plane. The sunlight passing through the windshield (250) and the cover (1001) at the second incident angle can be multiply reflected in the space between the concave mirror (1310) and the first flat mirror (1320). The sunlight multiply reflected in the space between the concave mirror (1310) and the first flat mirror (1320) travels toward a lower area in the Z-axis direction inside the dashboard (1010).

[0172] The vehicle imaging device (1000) may further include a motor (1335) to adjust the second inclination angle of the second flat mirror (1330). In this regard, the motor may be applied to the concave mirror (1310) or the second flat mirror (1330) to adjust the position of the virtual image according to the driver's eye level. In addition, a heat-blocking film may be applied to the front end of the image forming unit (PGU) (1100), the concave mirror (1310), or the cover (1010) to prevent damage from sunlight.

[0173] The motor (1335) can be coupled to the back surface of the second flat mirror (1330). The motor (1335) can adjust the second inclination angle of the second flat mirror (1330) to change the position on the Z-axis of a specific area (251R) where the second optical signal is displayed on the windshield (250). Accordingly, the eye box area can be adjusted to match the gaze position of the user of the vehicle by changing the position on the Z-axis of the specific area (251R) displayed on the windshield (250).

[0174] In this regard, Fig. 13 illustrates the arrangement structure of a vehicle imaging device that can be placed inside a dashboard of a vehicle according to an embodiment of the present specification and the structure through which optical signals are transmitted and reflected. Fig. 14 illustrates the polarization components of an optical signal that is multiple-reflected and transmitted between the concave mirror and the flat mirror of Fig. 12.

[0175] Referring to FIG. 13, a vehicle imaging device (1000-2) may be configured to include a picture forming unit (PGU) (1100), a concave mirror (1310), a flat mirror (1320b), and a mirror bench structure (1340). A flat mirror (1320b) may be disposed in a first region adjacent to the picture forming unit (PGU) (1100). A concave mirror (1310) may be disposed in a second region spaced apart from the flat mirror (1320b). The vehicle imaging device (1000-2) may further be configured to include a cover (1010b) and a windshield (250). The cover (1010b) of the vehicle imaging device (1000-2) may be formed in a curved structure, but is not limited thereto, and may be formed in a flat structure.

[0176] An optical signal emitted from a picture forming unit (PGU) (1100) may pass through a flat mirror (1320b) and be reflected by a concave mirror (1310). The optical signal reflected by the concave mirror (1310) may be reflected by the flat mirror (1320b) and may be reflected again by the concave mirror (1310). The optical signal reflected again by the concave mirror (1310) may pass through the flat mirror (1320b) and the cover (1010b) to steer the windshield (250) to display an image. Accordingly, an image of the optical signal steered by the windshield (250) may be displayed in a user's eye box area.

[0177] Fig. 14(a) shows the polarization components of an optical signal transmitted and reflected between a concave mirror (1310) and a flat mirror (1320b) in the structure of Fig. 12. Fig. 12(b) shows a structure in which an optical signal of a second polarization component (P-polarization) is reflected in a part of an area (B) of the flat mirror (1320b) of Fig. 12(a) and converted into an optical signal of a first polarization component (S-polarization).

[0178] Referring to FIGS. 13 and 14, a flat mirror (1320b) may be configured to include a phase retarder (1321) and a polarizing film (1322). The flat mirror (1320b) including the phase retarder (1321) and the polarizing film (1322) may transmit an optical signal of a first polarization component (S-polarization) and convert it into an optical signal of a second polarization component (P-polarization). In this regard, the polarizing film (1322) may be configured to transmit the first polarization component.

[0179] Meanwhile, a flat mirror (1320b) including a phase retarder (1321) and a polarizing film (1322) can reflect an optical signal of a second polarization component (P-polarization) and convert it into an optical signal of a first polarization component (S-polarization). In this regard, the polarizing film (1322) can be configured to reflect the second polarization component. The phase retarder (1321) can be configured to convert the second polarization component into a second circularly polarized component. The phase retarder (1321) can be implemented as a quarter-wave plate (QWP) that converts the second polarization component (e.g., P-polarization) into a second circularly polarized component (e.g., right-handed circularly polarized). The second circularly polarized component can be reflected from a reflective surface (1320R) of the flat mirror (1320b) and converted into a first circularly polarized component (e.g., left-handed circularly polarized). The reflected first circular polarization component can be converted back into the first polarization component (e.g., S-polarization) by passing through the phase retarder (1321).

[0180] The polarizing film (1322) may be attached so as to reflect one of the first and second polarization components and transmit the other component. The polarizing film (1322) may be attached so as to transmit the first polarization component and reflect the second polarization component. The polarizing film (1322) may be attached between the flat mirror (1320b) and the phase retarder (1321).

[0181] A flat mirror (1320b) having a phase retarder (1321) and a polarizing film (1322) attached thereto can transmit an optical signal of a first polarization component (S-polarization) and convert it into an optical signal of a second polarization component (P-polarization). The concave mirror (1310) can be configured to reflect all polarization components without a polarizing structure such as a separate polarizing film. The concave mirror (1310) can reflect an optical signal of the converted second polarization component.

[0182] The flat mirror (1320b) can reflect the optical signal of the second polarization component (P-polarization) reflected from the concave mirror (1310) and convert it into a second optical signal of the first polarization component (S-polarization). The concave mirror (1310) can then reflect the second optical signal of the first polarization component reflected from the flat mirror (1320b). The second optical signal of the first polarization component reflected from the concave mirror (1310) can then pass through the flat mirror (1320b) and the cover (1010b). The second optical signal of the first polarization component (S-polarization) can then be converted into a second optical signal of the second polarization component (P-polarization) by passing through the flat mirror (1320b).

[0183] Meanwhile, Fig. 15 shows a structure in which sunlight outside the windshield of the vehicle imaging device of Fig. 13 passes through the cover and is multi-reflected inside the dashboard.

[0184] Referring to FIGS. 13 to 15, the picture generation unit (PGU) (1100) of the vehicle imaging device (1000b) may be implemented as projection devices. The vehicle imaging device (1000b) may be configured to include a cover (1010b), a picture generation unit (PGU) (1100), a concave mirror (1310), and a flat mirror (1320b).

[0185] The image forming device (1100) may be placed inside the dashboard (1001) of a vehicle. The image forming device (1100) may be placed to form an optical signal on one side. The image forming device (1100) includes various projection devices and a display that displays pixels on a screen. The image forming device (1100) may be implemented using an LCD, OLED, DLP, LCoS, or micro LED.

[0186] The concave mirror (1310) may be positioned apart from the PGU (1100) so as to transmit an optical signal from the PGU (1100). The concave mirror (1310) may be configured to reflect optical signals of all polarization components without a polarizing film being positioned on the reflective surface.

[0187] The flat mirror (1320b) may be arranged spaced apart from the concave mirror (1310) in a first direction of the X-axis to reflect the transmitted light signal. The concave mirror (1310) may be arranged spaced apart from the flat mirror (1320b) in a first direction of the X-axis to reflect the transmitted light signal from the flat mirror (1320b). The PGU (1100) may be arranged spaced apart from the flat mirror (1320b) in a second direction of the X-axis. The second direction of the X-axis corresponds to the positive X-axis direction, which is opposite to the negative X-axis direction, which is the first direction of the X-axis.

[0188] The cover (1010b) may form the exterior (front) of the dashboard (1001). The cover (1010) may be formed of a non-metallic dielectric material so that a second optical signal reflected from the concave mirror (1310) and transmitted through the flat mirror (1320b) may pass therethrough. The cover (1010b) may have a curved, streamlined cross-section, but is not limited thereto, and may have a straight cross-section depending on the application. The second optical signal passing through the cover (1010b) may display an image on a specific region (251R) of the windshield (250) and advance to the user's eyebox region.

[0189] As described above, the concave mirror (1310) may be configured to reflect a first polarization component and a second polarization component orthogonal to the first polarization component. The concave mirror (1310) may be formed as a reflection surface to reflect optical signals of all polarization components. In this regard, the concave mirror (1310) may be implemented as a reflection surface without a polarization structure such as a separate polarizing film.

[0190] The flat mirror (1320b) may be configured to include a phase retarder (1321) and a polarizing film (1322). The flat mirror (1320b) including the phase retarder (1321) and the polarizing film (1322) may transmit a first polarization component and convert it into a second polarization component. In this regard, the polarizing film (1322) may be configured to transmit the first polarization component.

[0191] Meanwhile, a flat mirror (1320b) including a phase retarder (1321) and a polarizing film (1322) can reflect the second polarization component and convert it into a first polarization component. In this regard, the polarizing film (1322) can be configured to reflect the second polarization component. The phase retarder (1321) can be configured to convert the second polarization component into a second circularly polarized component. The phase retarder (1321) can be implemented as a quarter-wave plate (QWP) that converts the second polarization component (e.g., P-polarization) into a second circularly polarized component (e.g., right-handed circular polarization). The second circularly polarized component can be reflected from a reflective surface (1320R) of the flat mirror (1320b) and converted into a first circularly polarized component (e.g., left-handed circular polarization). The reflected first circular polarization component can be converted back into the first polarization component (e.g., S-polarization) by passing through the phase retarder (1321).

[0192] The polarizing film (1322) may be attached so as to reflect one of the first and second polarization components and transmit the other component. The polarizing film (1322) may be attached so as to transmit the first polarization component and reflect the second polarization component. The polarizing film (1322) may be attached between the flat mirror (1320b) and the phase retarder (1321).

[0193] A flat mirror (1320b) having a phase retarder (1321) and a polarizing film (1322) attached thereto can transmit an optical signal of a first polarization component (S-polarization) and convert it into an optical signal of a second polarization component (P-polarization). The concave mirror (1310) can be configured to reflect all polarization components without a polarizing structure such as a separate polarizing film. The concave mirror (1310) can reflect an optical signal of the converted second polarization component.

[0194] The flat mirror (1320b) can reflect the optical signal of the second polarization component (P-polarization) reflected from the concave mirror (1310) and convert it into a second optical signal of the first polarization component (S-polarization). The concave mirror (1310) can then reflect the second optical signal of the first polarization component reflected from the flat mirror (1320b). The second optical signal of the first polarization component reflected from the concave mirror (1310) can then pass through the flat mirror (1320b) and the cover (1010b). The second optical signal of the first polarization component (S-polarization) can then be converted into a second optical signal of the second polarization component (P-polarization) by passing through the flat mirror (1320b).

[0195] The PGU (1100) can be arranged at an inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). The flat mirror (1320b) can be arranged at a first inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). The concave mirror (1310) can be arranged at a second inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). Accordingly, the length along the X-axis of the vehicle imaging device (1000) including the PGU (1100), the concave mirror (1310), and the flat mirror (1320b) can be reduced, thereby reducing the overall volume. In addition, the concave mirror (1310) can be formed as a reflective structure and formed as a single flat mirror structure, thereby further reducing the length along the X-axis compared to the vehicle imaging devices of FIGS. 7 to 12.

[0196] The cover (1010b) may be arranged at a third inclination angle less than 90 degrees with respect to the horizontal plane (X-axis). In this regard, the cover (1010b) may be implemented as a cover having a curved (streamlined) cross-sectional shape as in FIG. 11, or may be implemented as a cover having a straight cross-sectional shape. The first inclination angle of the flat mirror (1320b) may be formed to be greater than the inclination angle of the PGU (1100). The second inclination angle of the concave mirror (1310) may be formed to be greater than the inclination angle of the PGU (1100). Therefore, the length on the X-axis between the flat mirror (1320b) and the concave mirror (1310) may be reduced.

[0197] By forming the first inclination angle of the flat mirror (1320b) and the second inclination angle of the concave mirror (1310) to be greater than a certain angle, the multiple reflection paths of the optical signal can be shortened. In addition, by forming the first inclination angle of the flat mirror (1320b) and the second inclination angle of the concave mirror (1310) to be greater than a certain angle, the sunlight entering the interior of the dashboard (1001) can be directed to the lower area on the Z-axis of the dashboard (1001).

[0198] The flat mirror (1320b) may be arranged in an upper region in the Z-axis direction than the concave mirror (1310). The first length (L1b) of the flat mirror (1320b) may be formed to be longer than the length of the PGU (1100). The second length (L2b) of the concave mirror (1310) may be formed to be longer than the length of the PGU (1100). Accordingly, even in a structure in which an optical signal is formed at a wide angle in the PGU (1100), transmission to the eye-box area is possible while minimizing optical signal loss. In this regard, the optical signal loss can be minimized by the flat mirror (1320b) having the first length (L1b) and the concave mirror (1310) having the second length (L2b) that are formed to be longer than the length of the PGU (1100).

[0199] A vehicle imaging device according to the present specification is formed with a sunlight avoidance structure. In this regard, the steering of a second optical signal inside a windshield (250) and sunlight outside the windshield (250) will be described. The second optical signal inside the windshield (250) can travel to the center point of the eye-box area at an incident angle of the X-axis less than 90 degrees with respect to the horizontal plane. The sunlight outside the windshield (250) passes through the windshield (250) and the cover (1001) at a second incident angle greater than the incident angle with respect to the horizontal plane. The sunlight passing through the windshield (250) and the cover (1001) at the second incident angle can be multiply reflected in the space between the concave mirror (1310) and the flat mirror (1320b). The sunlight multiply reflected in the space between the concave mirror (1310) and the flat mirror (1320b) travels toward a lower area in the Z-axis direction inside the dashboard (1010).

[0200] The vehicle imaging device (1000) may further include a mirror bench structure (1340) arranged in an area between the cover (1010b) and the windshield (250). The mirror bench structure (1340) may be arranged to reflect sunlight passing through the windshield (250) and pass through the cover (1010b). The sunlight reflected by the mirror bench structure (1340) and passing through the cover (1010b) may be multi-reflected in the space between the concave mirror (1310) and the flat mirror (1320b). The multi-reflected sunlight in the space between the concave mirror (1310) and the flat mirror (1320b) travels toward a lower area in the Z-axis direction inside the dashboard (1010).

[0201] The above has described a vehicle imaging device (1000, 1000b) according to one aspect of the present specification. Below, a vehicle equipped with a vehicle imaging device (1000, 1000b) according to another aspect of the present specification will be described. All descriptions of the vehicle imaging devices (1000, 1000b) of FIGS. 6A to 14 and the vehicle (1) of FIGS. 1 to 5 can be applied to a vehicle equipped with the vehicle imaging device (1000, 1000b) below. In this regard, FIG. 16 illustrates a block diagram of a vehicle equipped with a vehicle imaging device according to the present specification.

[0202] A vehicle equipped with a vehicle imaging device according to the present specification will be described with reference to FIGS. 1 to 16. The vehicle (1) may be configured to include a windshield (250) and a vehicle imaging device (1000, 1000b). The vehicle imaging device may be implemented as the vehicle imaging device (1000) of FIGS. 7 to 12 or as the vehicle imaging device (1000b) of FIGS. 13 to 15.

[0203] Hereinafter, a vehicle (1) equipped with a vehicle imaging device (1000) of FIGS. 7 to 12 will be described, but is not limited thereto and can also be applied to a vehicle imaging device (1000b) of FIGS. 13 to 15. A windshield (250) can be placed on the front of the vehicle (1). The vehicle imaging device (1000, 1000b) can be placed inside a dashboard (1001) of the vehicle (1) and between the windshield (250) and the dashboard (1001). The dashboard (1001) can be configured to include an upper region (1001a) and a lower region (1001b).

[0204] A vehicle imaging device (1000) may be configured to include a cover (1010), a picture forming unit (PGU) (1100), a concave mirror (1310), a first flat mirror (1320), and a second flat mirror (1330).

[0205] The image forming device (1100) may be placed inside a dashboard (1001) of a vehicle. The image forming device (1100) may be placed to form an optical signal on one side. The image forming device (1100) includes various projection devices and a display that displays pixels on a screen. The image forming device (1100) may be implemented as a liquid crystal display (LCD), an organic light emitting diode (OLED), a DLP, an LCoS, or a micro LED.

[0206] A concave mirror (1310) may be positioned apart from the PGU (1100) to transmit an optical signal from the PGU (1100). A polarizing film (1312) may be positioned on at least one surface of the concave mirror (1310). The polarizing film (1312) may be formed to selectively transmit or reflect an optical signal from the PGU (1100) depending on a polarization component of the optical signal.

[0207] The first flat mirror (1320) may be spaced apart from the concave mirror (1310) in the first direction of the X-axis to reflect the transmitted light signal. The image forming device (1100) and the first flat mirror (1320) may be placed in the lower area (1001b) of the dashboard (1001).

[0208] The second flat mirror (1330) may be arranged so that the light signal reflected from the first flat mirror (1320) reflects the second light signal that has passed through the concave mirror (1310) again. The second flat mirror (1330) may be arranged so that the second light signal reflected from the concave mirror (1310) is directed toward the concave mirror (1310) and is spaced apart from the concave mirror (1310) in the second direction of the X-axis. The second direction of the X-axis corresponds to the positive X-axis direction, which is the opposite direction to the negative X-axis direction, which is the first direction of the X-axis. The second flat mirror (1330) may be arranged in the upper region (1001a) of the dashboard (1001). Meanwhile, the concave mirror (1310) may be arranged in the upper region (1001a) and the lower region (1001b) of the dashboard (1001).

[0209] The cover (1010) may form the exterior (front) of the dashboard (1001). The cover (1010) may be formed of a non-metallic dielectric material so that a second optical signal reflected from the concave mirror (1310) and transmitted through the second flat mirror (1330) may pass therethrough. The second optical signal passing through the cover (1010) may display an image on a specific region (251R) of the windshield (250) and may proceed to the user's eyebox region.

[0210] A concave mirror (1310) may have a polarizing film (1312) attached thereto so as to transmit a first polarization component and reflect a second polarization component. For example, the first polarization component may be an S-polarization component and the second polarization component may be a P-polarization component, but is not limited thereto and may be any different orthogonal polarization components. A first flat mirror (1320) may have a first polarizing film (1322) attached thereto so as to reflect the first polarization component and transmit the second polarization component.

[0211] The second flat mirror (1330) may be configured to include a phase retarder (1331) and a second polarizing film (1332). The phase retarder (1331) may be configured to convert a first polarization component into a first circularly polarized component. The phase retarder (1331) may be implemented as a quarter-wave plate (QWP) that converts the first polarization component (e.g., S-polarization) into a first circularly polarized component (e.g., left-hand circular polarization). The first circularly polarized component may be reflected from a reflective surface (1330R) of the second flat mirror (1330) and converted into a second circularly polarized component (e.g., right-hand circular polarization). The reflected second circularly polarized component may be converted into a second polarization component (e.g., P-polarization) while passing through the phase retarder (1331).

[0212] The second polarizing film (1332) may be attached so as to reflect one of the first and second polarization components and transmit the other component. The second polarizing film (1332) may be attached so as to reflect the first polarization component and transmit the second polarization component. The second polarizing film (1332) may be attached between the second flat mirror (1330) and the phase retarder (1331).

[0213] The concave mirror (1310) can transmit the light signal of the first polarization component emitted from the PGU (1100). The first flat mirror (1320) to which the first polarization film (1322) is attached can reflect the transmitted light signal of the first polarization component. As another example, the first flat mirror (1320) can be implemented without the polarization film so as to reflect the light signal of all polarization components.

[0214] A concave mirror (1310) to which a polarizing film (1311) is attached can retransmit the reflected light signal of the first polarization component. A second flat mirror (1320) to which a phase retarder (1331) and a second polarizing film (1332) are attached can convert the polarization of the light signal of the first polarization component and reflect a second light signal of the second polarization component.

[0215] As described above, the phase retarder (1331) may be implemented as a quarter-wave plate (QWP) that converts a first polarization component (e.g., S-polarization) into a first circularly polarized component (e.g., left-hand circular polarization). The first circularly polarized component may be reflected from a reflective surface (1330R) of a second flat mirror (1330) and converted into a second circularly polarized component (e.g., right-hand circular polarization). The reflected second circularly polarized component may be converted into a second polarization component (e.g., P-polarization) while passing through the phase retarder (1331).

[0216] A concave mirror (1310) having a polarizing film (1311) attached thereto can reflect a second optical signal of a second polarization component. The reflected second optical signal of the second polarization component can pass through the cover (1010) by transmitting through the second flat mirror (1330) having a second polarizing film (1332) attached thereto.

[0217] The PGU (1100) can be arranged at an inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). The first flat mirror (1320) can be arranged at a first inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). The second flat mirror (1330) can be arranged at a second inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). The concave mirror (1310) can be arranged at a third inclination angle greater than 90 degrees with respect to the horizontal plane (X-axis). Accordingly, the length of the vehicle imaging device (1000) including the PGU (1100), the concave mirror (1310), the first flat mirror (1320), and the second flat mirror (1330) on the X-axis can be reduced, thereby reducing the overall volume.

[0218] The covers (1010, 1010b) may be arranged at a fourth inclination angle less than 90 degrees with respect to the horizontal plane (X-axis). In this regard, the cover (1010) may be implemented as a cover having a straight cross-sectional shape as in FIG. 8, or the cover (1010b) may be implemented as a cover having a curved (streamlined) cross-sectional shape as in FIG. 9. The second inclination angle of the second flat mirror (1320) may be formed to be greater than the first inclination angle of the first flat mirror (1320), thereby reducing the length on the X-axis between the first and second flat mirrors (1320, 1330). The second inclination angle of the second flat mirror (1320) may be formed to be greater than the third inclination angle of the concave mirror (1320), thereby shortening the multiple reflection paths of the optical signal. In addition, the second inclination angle of the second flat mirror (1320) is formed to be greater than the third inclination angle of the concave mirror (1320), so that sunlight entering the interior of the dashboard (1001) can be directed to the lower area on the Z-axis of the dashboard (1001).

[0219] The second flat mirror (1330) may be arranged in a higher region in the Z-axis direction than the first flat mirror (1320). In this regard, the PGU (1100) may be arranged in a lower region of the second flat mirror (1330). The optical signal of the PGU (1100) may be reflected from the first flat mirror (1320) in the lower region in the Z-axis direction, transmitted through the concave mirror (1310), and reflected from the second flat mirror (1330) in the upper region in the Z-axis direction. Therefore, by arranging the first and second flat mirrors (1320, 1330) only in desired regions, it is possible to prevent undesired reflection components caused by some reflection components in the concave mirror (1310).

[0220] The second length (L2) of the second flat mirror (1330) may be formed longer than the first length (L1) of the first flat mirror (1320). Since the first flat mirror (1320) is formed with a single reflection structure, it is formed with the shortest first length (L1). Since the second flat mirror (1330) is formed with a reflection and transmission structure depending on the polarization component, it is formed with a second length (L2) that is longer than the first length (L1). The third length (L3) of the concave mirror (1310) may be formed longer than the second length (L2) of the second flat mirror (1330). Since the concave mirror (1310) is formed with a multiple transmission structure and a single reflection structure, it is formed with the longest third length (L3).

[0221] A vehicle imaging device according to the present specification is formed with a sunlight avoidance structure. In this regard, the steering of a second optical signal inside a windshield (250) and sunlight outside the windshield (250) will be described. The second optical signal inside the windshield (250) can travel to the center point of the eye-box area at an incident angle of the X-axis less than 90 degrees with respect to the horizontal plane. The sunlight outside the windshield (250) passes through the windshield (250) and the cover (1001) at a second incident angle greater than the incident angle with respect to the horizontal plane. The sunlight passing through the windshield (250) and the cover (1001) at the second incident angle can be multiply reflected in the space between the concave mirror (1310) and the first flat mirror (1320). The sunlight multiply reflected in the space between the concave mirror (1310) and the first flat mirror (1320) travels toward a lower area in the Z-axis direction inside the dashboard (1010).

[0222] The vehicle imaging device (1000) may further include a motor (1335) to adjust a second tilt angle of the second flat mirror (1330). The motor (1335) may be coupled to the back surface of the second flat mirror (1330). The motor (1335) may adjust the second tilt angle of the second flat mirror (1330) to change the position on the Z-axis of a specific area (251R) where the second optical signal is displayed on the windshield (250). Accordingly, the eye-box area may be adjusted to match the line of sight of a user of the vehicle by changing the position on the Z-axis of the specific area (251R) displayed on the windshield (250).

[0223] The above describes a volume-reduced vehicle imaging device capable of avoiding sunlight according to this specification and a vehicle equipped with the same. The technical effects of the volume-reduced vehicle imaging device capable of avoiding sunlight according to this specification and a vehicle equipped with the same can be summarized as follows, but are not limited thereto.

[0224] The technical features of a vehicle imaging device having a reduced volume according to the present specification and a vehicle equipped with the same can be summarized as follows.

[0225] According to the present specification, a volume-reduced vehicle imaging device can be implemented by arranging first and second flat mirrors on one side and the other side of a concave mirror inside a cover of a dashboard to avoid sunlight.

[0226] According to the present specification, a vehicle imaging device can be implemented that guarantees a field of view (FOV) of a certain angle or more in a reduced volume according to a limited mounting space through a multi-reflective structure by configuring some mirrors to reflect or transmit optical signals.

[0227] According to the present specification, a volume-reduced vehicle imaging device can be implemented that avoids sunlight by forming a mirror structure to allow sunlight to be multi-reflected and thereby allow sunlight passing through a windshield to proceed to a lower area of ​​the vehicle.

[0228] According to the present specification, a volume-reduced vehicle imaging device capable of avoiding sunlight and having freedom in the angle and position of optical components can be implemented through a space secured by overlapping optical paths using two or more selective transmitting / reflecting optical components.

[0229] According to the present specification, a volume-reduced vehicle imaging device capable of avoiding sunlight and having a structure without back reflection while implementing volume reduction can be implemented.

[0230] Further scope of the applicability of this specification will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of this specification will be apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments, are given by way of example only.

Claims

1. In vehicle video devices, A picture generation unit (PGU) placed inside the dashboard of a vehicle and forming an optical signal to one side; A concave mirror positioned spaced apart from the PGU so as to transmit the optical signal; A first flat mirror arranged spaced apart from the concave mirror in a first direction to reflect the transmitted light signal; A second flat mirror arranged in a second direction opposite to the first direction and spaced apart from the concave mirror so that the reflected light signal reflects a second light signal that has passed through the concave mirror again and is directed toward the concave mirror; and A cover forming the exterior of the above dashboard and through which a second optical signal transmitted through the second flat mirror passes, A vehicle imaging device in which the second optical signal passing through the cover displays an image on a specific area of ​​the windshield and progresses to the user's eyebox region.

2. In paragraph 1, The above concave mirror has a polarizing film attached thereto so as to transmit the first polarization component and reflect the second polarization component. A vehicle imaging device, wherein the first flat mirror has a first polarizing film attached thereto so as to reflect the first polarization component and transmit the second polarization component.

3. In paragraph 2, The above second flat mirror, a phase retarder for converting the first polarization component into a first circular polarization component; and A vehicle imaging device comprising a second polarizing film attached so as to reflect the first polarization component and transmit the second polarization component.

4. In paragraph 3, The above concave mirror transmits the optical signal of the first polarization component emitted from the PGU, The first flat mirror to which the first polarizing film is attached reflects the light signal of the transmitted first polarization component, The above concave mirror retransmits the light signal of the reflected first polarization component, The second flat mirror to which the phase retarder and the second polarizing film are attached converts the polarization of the second optical signal of the first polarization component and reflects it as a second optical signal of the second polarization component. The above concave mirror reflects the second optical signal of the second polarization component, A vehicle imaging device, wherein the second optical signal of the second reflected polarization component passes through the second flat mirror and passes through the cover.

5. In paragraph 1, The above PGU is placed at an inclination angle greater than 90 degrees with respect to the horizontal plane, The first flat mirror is arranged at a first inclination angle greater than 90 degrees with respect to the horizontal plane, The second flat mirror is arranged at a second inclination angle greater than 90 degrees with respect to the horizontal plane, A vehicle imaging device, wherein the above concave mirror is arranged at a third inclination angle greater than 90 degrees with respect to the horizontal plane. A vehicle imaging device, wherein the cover is positioned at a fourth inclination angle less than 90 degrees with respect to the horizontal plane.

6. In paragraph 5, A vehicle imaging device, characterized in that the second inclination angle of the second flat mirror is greater than the first inclination angle of the first flat mirror and greater than the third inclination angle of the concave mirror.

7. In paragraph 5, The second flat mirror is positioned in an upper region in the Z-axis direction than the first flat mirror, The first length of the first flat mirror is formed longer than the second length of the second flat mirror, A vehicle imaging device, wherein the third length of the concave mirror is formed longer than the first length of the first flat mirror.

8. In paragraph 5, The second optical signal inside the windshield propagates to the center point of the eye box area at an incidence angle less than 90 degrees with respect to the horizontal plane, Sunlight outside the windshield passes through the windshield and the cover at a second incidence angle greater than the incidence angle with respect to the horizontal plane and is multiply reflected in the space between the concave mirror and the first flat mirror, A vehicle imaging device in which multi-reflected sunlight in the above space propagates toward a lower area in the Z-axis direction inside the dashboard.

9. In paragraph 5, A vehicle imaging device further comprising a motor coupled to the rear surface of the second flat mirror and configured to adjust the second inclination angle of the second flat mirror.

10. In vehicle video devices, A picture generation unit (PGU) placed inside the dashboard of a vehicle and forming an optical signal to one side; A flat mirror arranged spaced apart from the PGU in the first direction so as to transmit the optical signal; A concave mirror arranged spaced apart from the flat mirror in the first direction to reflect the transmitted light signal; A cover forming the exterior of the above dashboard and including a second optical signal passing through the flat mirror by being multi-reflected between the concave mirror and the flat mirror, A vehicle imaging device in which the second optical signal passing through the cover displays an image on a specific area of ​​the windshield and progresses to the user's eyebox region.

11. In paragraph 9, The above flat mirror, a phase retarder for converting the first polarization component into a first circular polarization component; and A polarizing film is included so as to transmit the first polarization component and reflect the second polarization component. A vehicle imaging device, wherein the above concave mirror is configured to reflect all polarization components.

12. In paragraph 11, The flat mirror to which the above phase retarder and the above polarizing film are attached transmits the light signal of the first polarization component and converts it into the light signal of the second polarization component, The above concave mirror reflects the light signal of the second polarization component, The above flat mirror reflects the light signal of the second polarization component reflected from the above concave mirror, The above concave mirror re-reflects the light signal of the second polarization component reflected from the above flat mirror to form a second light signal of the second polarization component, A vehicle imaging device, wherein the second optical signal of the second polarization component transmits through the flat mirror and passes through the cover.

13. In paragraph 10, The above PGU is placed at an inclination angle greater than 90 degrees with respect to the horizontal plane, The above flat mirror is arranged at a first inclination angle greater than 90 degrees with respect to the horizontal plane, A vehicle imaging device, wherein the above concave mirror is arranged at a second inclination angle greater than 90 degrees with respect to the horizontal plane. A vehicle imaging device, wherein the cover is positioned at a third inclination angle less than 90 degrees with respect to the horizontal plane.

14. In paragraph 13, The first inclination angle of the above flat mirror is greater than the inclination angle of the above PGU, A vehicle imaging device, characterized in that the second inclination angle of the concave mirror is greater than the inclination angle of the PGU.

15. In paragraph 12, The above flat mirror is arranged in an upper region in the Z-axis direction than the above concave mirror, The first length of the above flat mirror is formed longer than the length of the PGU, A vehicle imaging device, wherein the second length of the above concave mirror is formed longer than the length of the above PGU.

16. In Article 13, The second optical signal inside the windshield propagates to the center point of the eye box area at an incidence angle less than 90 degrees with respect to the horizontal plane, Sunlight outside the windshield passes through the windshield and the cover at a second incidence angle greater than the incidence angle with respect to the horizontal plane and is multiply reflected in the space between the concave mirror and the flat mirror, A vehicle imaging device in which multi-reflected sunlight in the above space propagates toward a lower area in the Z-axis direction inside the dashboard.

17. In paragraph 13, A vehicle imaging device further comprising a mirror bench structure disposed in an area between the cover and the windshield and reflecting sunlight passing through the windshield to pass through the cover.

Images