Display device

Abstract

This display device is mounted on a vehicle driven by a driver and projects video light. The display device can display information on a remaining drivable period up to a predetermined driving time, and information on a cumulative rest period to be taken for driving up to the predetermined driving time.

Description

Display device

[0001] The present invention relates to a display device, a virtual image display device, and a vehicle equipped with the display device.

[0002] A display device or a virtual image display device that projects video light onto a windshield or a front glass of a vehicle such as an automobile to display a virtual image, and displays driving information such as vehicle speed and engine speed, traffic information from navigation, and vehicle information such as remaining fuel and coolant temperature is known.

[0003] Japanese Patent Application Laid-Open No. 3-169752

[0004] The display device is arranged, for example, on or inside the dashboard of the vehicle. When using the display device, the driver can obtain the information necessary for driving without moving the line of sight to the instrument panel incorporated in the dashboard, that is, the so-called instrument panel. On the other hand, sufficient consideration has not been given to the arrangement, brightness, influence from external light, information display, etc. of the display device.

[0005] An object of the present invention is to provide a more suitable display device or display technology.

[0006] According to an aspect of the present invention, the following display device is provided. The display device is a device mounted on a vehicle and projects video light. The display device can display information on the remaining drivable time until a predetermined driving time and information on the cumulative time of rest time to be acquired during driving per the predetermined driving time.

[0007] According to the present invention, a more suitable display device or display technology can be provided. Incidentally, problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

[0008] This figure shows an example of an in-vehicle system including a display device. This figure shows an example of a device used to acquire vehicle information. This is a block diagram showing an example of a display device. This figure shows an example of a configuration in which a display device is mounted on a vehicle. This figure shows an example of a configuration in which a display device is mounted on a vehicle. This figure shows an example of a light source structure of a display device. This figure shows an example of a display area layout. This is a flowchart showing an example of a video display flow. This figure shows an example of a screen configuration. This figure shows an example of a screen configuration. This figure shows an example of a display when the vehicle is stopped. This figure shows an example of a display when the vehicle is in motion. This figure illustrates an example of a warning display related to vehicle speed in the first embodiment. This figure illustrates an example of a warning display related to vehicle speed in the first embodiment. This figure illustrates an example of a display when the driver takes a break in the first embodiment. This figure illustrates an example of a display when the driver takes a break in the first embodiment. This figure illustrates an example of a display when the continuous break time does not exceed a predetermined time in the first embodiment. This figure illustrates an example of a display when the continuous break time does not exceed a predetermined time in the first embodiment. This figure illustrates an example of a display when the continuous driving time exceeds a predetermined time in the first embodiment. This figure illustrates an example of a display when the continuous driving time exceeds a predetermined time in the first embodiment. This figure shows an example of the display while the vehicle is stopped when it is linked with an external terminal, relating to the second embodiment. This figure shows an example of the display while the vehicle is in motion when it is linked with an external terminal, relating to the second embodiment. This figure shows an example of the display while the vehicle is in motion when it is linked with an external terminal, relating to the third embodiment. This figure shows an example of the display while the vehicle is in motion when it is linked with an external terminal, relating to the third embodiment. This figure shows an example of the display while the vehicle is in motion when it is linked with an external terminal, relating to the third embodiment. This figure shows an example of the display while the vehicle is stopped, relating to the third embodiment. This is an example of the display when the vehicle is not receiving a signal from a beacon, relating to the fourth embodiment. This is an example of the display when the vehicle is receiving a signal from a beacon, relating to the fourth embodiment. This is an example of the display of the menu screen, relating to the fifth embodiment. This is an example of the display of the menu screen, relating to the fifth embodiment. This is an example of the display of the menu screen, relating to the fifth embodiment.This figure shows an example of the relationship between the set Amp. value and the correction magnification. This is an example of the display of the menu screen in the fifth embodiment. This is an example of the display of the menu screen in the fifth embodiment. This is an example of the display of the menu screen in the fifth embodiment. This is an example of the display of the menu screen that presents information in the fifth embodiment. This is an example of the display of the menu screen that presents information in the fifth embodiment. This is an example of the display of the menu screen that presents information in the fifth embodiment. This is an example of the display of the menu screen that presents information in the fifth embodiment. This is an example of the display of the screen that presents information in the fifth embodiment. This is an example of the display of the screen that sets the start of the continuous running time.

[0009] Embodiments of the present invention will be described below with reference to the drawings. The embodiments are illustrative examples for explaining the present invention, and have been omitted and simplified as appropriate for clarity of explanation. The present invention can also be implemented in various other forms. Unless otherwise specified, each component may be singular or plural. The position, size, shape, and range of each component shown in the drawings may not represent the actual position, size, shape, and range in order to facilitate understanding of the invention. Therefore, the present invention is not necessarily limited to the position, size, shape, and range disclosed in the drawings. When there are multiple components that have the same or similar function, they may be described using the same reference numeral with different subscripts. Also, when it is not necessary to distinguish between these multiple components, the subscripts may be omitted in the description.

[0010] In explanations, when describing program-based processing, the focus may sometimes be on the program, functions, or processing units. However, the main hardware component is the processor, or a controller, device, computer, or system composed of such a processor. The computer, using its processor, executes processing according to the program read into memory, utilizing resources such as memory and communication interfaces as appropriate. This realizes the specified functions and processing units. The processor is composed of semiconductor devices such as a CPU / MPU or GPU. Processing is not limited to software program processing; it can also be implemented using dedicated circuits. Applicable dedicated circuits include FPGAs, ASICs, CPLDs, etc.

[0011] The program may be pre-installed as data on the target computer, or it may be distributed as data to the target computer from the program source. The program source may be a program distribution server on a communication network, or a non-transient computer-readable storage medium, such as a memory card or disk. The program may consist of multiple modules. The computer system may consist of multiple devices. The computer system may consist of a client-server system, a cloud computing system, an IoT system, etc. Various types of data and information are composed of structures such as tables and lists, but are not limited to these. Representations such as identification information, identifiers, IDs, names, and numbers are interchangeable.

[0012] Figure 1 shows an example configuration of an in-vehicle system including a display device or virtual image display device 1. With respect to the vehicle or ride 2 and the driver, the horizontal direction X is the left-right direction, the lateral direction of the vehicle or ride 2, or the width direction of the vehicle or ride 2; the vertical direction Z is the up-down direction, or vertical direction of the vehicle; and the horizontal direction Y, which is perpendicular to the lateral direction of the vehicle or ride 2, is the front-rear direction of the vehicle or ride 2, or the direction of travel of the vehicle. In the example in Figure 1, the direction in which the vehicle travels is set to be the negative direction in the Y-axis direction. The display device 1 may also be called a virtual image display device. The following explanation will use the name "display device". The vehicle or ride 2 is typically an automobile or a truck, but is not limited to these, and may also be a railway vehicle or an aircraft. The following explanation will use the name "vehicle".

[0013] The display device 1 acquires vehicle information 4 from cameras and various sensors installed in various parts of the vehicle 2. The various sensors, for example, detect various events that occur in the vehicle 2 and periodically detect the values ​​of various parameters related to driving conditions. It can also acquire road information from the navigation device 6 (car navigation system), external devices 400, terminal devices 410 (e.g., mobile terminals), and GPS (Global Positioning System) information. The GPS may be installed in the vehicle 2, or it may be installed in the external devices 400 or terminal devices 410.

[0014] Vehicle information 4 includes, for example, vehicle 2's speed information, gear information, steering angle information, lamp illumination information, ambient light information, distance information, infrared information, engine ON / OFF information, camera image information, accelerometer / gyro information, GPS (Global Positioning System) information, navigation information, vehicle-to-vehicle communication information, and vehicle-to-infrastructure communication information. Camera image information includes in-vehicle camera image information and exterior camera image information. GPS information includes latitude and longitude as well as current time information. Vehicle information 4 also includes input information from the driver.

[0015] The display device 1 is connected to the controller 100 of the vehicle 2 via an information transmission path, and the display device 1 and the controller 100 are able to communicate with each other. The controller 100 of the vehicle 2 is an ECU (Electronic Control Unit). The display device 1 and the controller 100 of the vehicle 2 communicate via the information transmission path using, for example, a CAN (Controller Area Network) or LIN (Local Interconnect Network) interface. Alternatively, the display device 1 and the controller 100 of the vehicle 2 may communicate via the information transmission path using an in-vehicle Ethernet or the like. Other connection configurations may also be adopted. For example, when transmitting all information, including video information, through a single information transmission path, the connection between the controller 100 on the vehicle 2 side (source of video information, etc.) and the display device 1 (in other words, the connection configuration of the information transmission path) may be FPD-Link III, GMSL (Gigabit Multimedia Serial Link), etc.

[0016] The in-vehicle system is configured such that the controller 100 controls the vehicle 2 based on data input and output and is connected to the display device 1. The in-vehicle system can communicate with the outside of the vehicle 2 via a communication device or network. Examples of communication with the outside of the vehicle 2 include direct communication and indirect communication. Direct communication is used internationally as ITS (Intelligent Transport System) communication, while indirect communication is performed, for example, via a server to an external device 400 or terminal device 410. The in-vehicle system can send and receive data or information to, for example, a server 700 connected to the network 500 via a relay station 600 on the network 500. The in-vehicle system may also communicate with infrastructure such as external devices and terminals installed on the road on which the vehicle 2 travels.

[0017] Figure 2 shows an example of a device used to acquire vehicle information. As shown in Figure 2, vehicle information 4 is acquired using devices such as a camera and various sensors connected to the controller 100 or control device 100. Note that the various devices in Figure 2 can be deleted, other types of devices added, or replaced with other types of devices as appropriate. Also, as an example, the controller 100 of the vehicle 2 may also have the function of controlling the display device 1.

[0018] The vehicle speed sensor 901 detects the speed of the vehicle 2 and is used to generate speed information as a result of the detection. The shift position sensor 902 detects the current gear and is used to generate gear information as a result of the detection. The steering angle sensor 903 detects the current steering angle and is used to generate steering angle information as a result of the detection. The headlight sensor 904 detects whether the headlights are ON or OFF and is used to generate lamp illumination information as a result of the detection.

[0019] The illuminance sensor 905 and the chromaticity sensor 906 detect ambient light from the vehicle 2 and are used to generate ambient light information as detection results. The distance measuring sensor 907 detects the distance between the vehicle 2 and an external object, or the distance between external objects, and is used to generate distance information as detection results. The infrared sensor 908 detects the presence and distance of objects in the vicinity of the vehicle 2 and is used to generate infrared information as detection results. The engine start sensor 909 detects the ON / OFF status of the engine and is used to generate ON / OFF information as detection results. The acceleration sensor 912 and the gyro sensor 913 detect the acceleration and angular velocity of the vehicle 2 and are used to generate acceleration gyro information representing the attitude and behavior of the vehicle 2.

[0020] The temperature sensor 914 detects the temperature inside and outside the vehicle and is used to generate temperature information as the detection result. For example, if the display device 1 is located inside the dashboard of the vehicle 2, the temperature sensor 914 may be used to detect the temperature inside the dashboard. If a temperature that may affect the operation of the display device 1 is detected, the display device 1 may stop operating. The temperature sensor 914 may also be located in other places that may reach temperatures similar to those inside the dashboard.

[0021] Furthermore, if the display device 1 is installed on the dashboard or elsewhere, the temperature sensor 914 may be used to detect the temperature in the vicinity where the display device 1 is installed. If a temperature is detected that may affect the operation of the display device 1 due to direct sunlight or the like, the display device 1 may stop operating. Here, the temperature sensor 914 may be placed on the dashboard as an example. The temperature sensor 914 may also be placed outside the vehicle, assuming that the temperature near the display device 1 and the temperature outside the vehicle are similar.

[0022] The vehicle-to-infrastructure wireless transceiver 915 generates vehicle-to-infrastructure communication information through vehicle-to-infrastructure communication between the vehicle 2 and roads, signs, signals, etc. The vehicle-to-vehicle wireless transceiver 916 generates vehicle-to-vehicle communication information through vehicle-to-vehicle communication between the vehicle 2 and other surrounding vehicles. The wired wireless communication unit 917 for mobile terminal-to-vehicle communication is a device that acquires information via wired or wireless communication from devices connected to an LTE (Long Term Evolution) network (e.g., Wi-Fi devices). The controller 100 or control device can acquire information transmitted and received on the LTE network via the wired wireless communication unit 917 for mobile terminal-to-vehicle communication.

[0023] The in-vehicle camera 919 and the exterior camera 920 capture images of the interior and exterior of the vehicle and are used to generate in-vehicle and exterior camera image information. Specifically, the in-vehicle camera 919 is, for example, a camera for a Driver Monitoring System (DMS) that captures the driver's posture, eye position, and movement. In this case, by analyzing the captured images, the driver's fatigue level and gaze position can be determined.

[0024] On the other hand, the external camera 920 captures images of the surroundings, such as the front and rear of the vehicle 2. In this case, by analyzing the captured images, it becomes possible to determine the presence or absence of obstacles such as other vehicles or people in the vicinity, buildings and terrain, road surface conditions such as rain, snow, ice, and unevenness, and road signs. The external camera 920 may also include, for example, a drive recorder that records the situation while driving.

[0025] The GPS receiver 921 generates GPS information obtained by receiving GPS signals from GPS satellites. For example, the GPS receiver 921 can obtain the current time, latitude, and longitude. The VICS (Vehicle Information and Communication System, registered trademark) receiver 922 generates VICS information obtained by receiving VICS signals. The GPS receiver 921 and the VICS receiver 922 may be provided as part of a navigation system.

[0026] The voice input device 918 receives the driver's voice and is used to generate voice information. The driver can input operation details via the voice input device 918 by speaking. The vehicle operation switches 911 are used to generate driver operation information for steering wheel switches, etc.

[0027] Furthermore, the video generation unit 910 generates video information based on vehicle information 4 acquired by the controller 100 of the vehicle 2. It can also generate video information based on external information.

[0028] Figure 3 is a block diagram of the display device 1. It is mainly used to control the display of projected images (virtual images) on the display device 1.

[0029] In Figure 3, the display device 1 includes, for example, a control unit 1010, a non-volatile memory 1011, a volatile memory 1012, a storage unit 1013, a display driver 1021, and a light source drive unit 1022, all of which are mounted on a wiring board or the like. The display device 1 also includes a communication unit 1014, a wireless communication unit 1015, a video processing unit 1016, an operation input unit 1017, an external power input unit 1018, a speaker 1019, and a light-emitting indicator 1020.

[0030] The control unit 1010 is specifically a microcontroller unit (MCU), a CPU (Central Processing Unit), etc. Each block other than the control unit 1010 may be mounted within the control unit 1010 as appropriate. Furthermore, the display device 1 is not limited to implementation using the control unit 1010, but may also be implemented using an ECU (Electronic Control Unit) or other semiconductor devices. The configuration shown in Figure 3 may, for example, be a control unit mounted inside the housing of the display device 1, or a control unit mounted outside the housing. Also, the display device 1 can be controlled by a controller in the vehicle 2 or an external device without implementing the control unit 1010 in the display device 1.

[0031] The non-volatile memory 1011 primarily stores programs executed within the control unit 1010, setting parameters used in the processing of each part within the control unit 1010, and predefined audio and video data. The non-volatile memory 1011 may also store information other than programs, such as video, audio, and video.

[0032] The volatile memory 1012 operates by unpacking the program stored in the non-volatile memory 1011. The volatile memory 1012 primarily processes acquired information and various data used in the processing of each part within the control unit 1010 as appropriate.

[0033] The storage unit 1013 stores video data, video data, or audio data for output to the speaker 1019, etc. The video data, video data, or audio data to be stored in the storage unit 1013 may be stored in the storage unit 1013 in advance. Alternatively, the video data, video data, or audio data to be stored in the storage unit 1013 may be received from an external device via the communication unit 1014.

[0034] In Figure 3, the communication unit 1014 transmits and receives information such as vehicle information 4 to and from the controller 100 of the vehicle 2 or various devices such as sensors of the vehicle 2, using a mechanism such as CAN or an in-vehicle Ethernet. The communication unit 1014 may also receive video information using a mechanism such as FPD-Link III or GMSL. The hardware of the communication interface that receives vehicle information 4 and the hardware of the communication interface that receives video information in the communication unit 1014 may be separate or integrated. The communication unit 1014 may also function as the control unit of the display device 1.

[0035] The wireless communication unit 1015 may be configured with a Wi-Fi communication interface, a Bluetooth® communication interface, a mobile communication interface such as 4G or 5G, etc. As shown in Figure 1, the wireless communication unit 1015 may communicate with external devices via a network 500 connected through a router or relay station 600. An example of an external device is a server 700 connected via the network 500. Alternatively, the wireless communication unit 1015 may communicate directly with a terminal device 410, etc. An example of a terminal device 410 is a smartphone, tablet, wireless earphones, headphones, or beacon.

[0036] The video processing unit 1016 may perform distortion correction, conversion, and other processing on the received video information. The video processing unit 1016 may generate video data for the video display unit 200 using acquired vehicle information, external information, etc. Specifically, the distortion correction here corrects the distortion of the video caused by the curvature of the windshield 3 when the video from the display device 1 is projected onto the display area 5, as shown in Figure 1. The video processing unit 1016 may also be implemented by the control unit 1010 reading and executing a program stored in the non-volatile memory 1011 or the volatile memory 1012.

[0037] In other words, the video processing unit 1016 processes video data related to the display video projected onto the display area 5, such as in Figure 1, based on information acquired from an external source or from the vehicle 2. On the other hand, the video processing unit 1016 is not necessarily required, but in such a case, the control unit 1010 can process video information from the vehicle 2 or an external terminal via the communication unit 1014. Alternatively, the controller 100 of the vehicle 2 may process the video information.

[0038] The operation input unit 1017 is, for example, an operation button, a receiver for a remote controller, or an infrared light receiver, and is used to input user operations. The operation input unit 1017 may be used, for example, for the driver to operate the display device 1.

[0039] The external power input unit 1018 receives power from an external source and supplies the necessary power to each part of the display device 1 shown in Figure 3.

[0040] The speaker 1019 emits sound based on audio data stored in the volatile memory 1012, the non-volatile memory 1011, or the storage unit 1013.

[0041] The light-emitting indicator 1020 emits light using a light-emitting element or the like, and can notify the user of the status of the display device 1 by the timing of the light emission of the light-emitting element or the color of the emitted light.

[0042] The display driver 1021 drives each display element (pixel) included in the display panel 11 based on the video data. This allows the video display unit 200 to create and display an image for projection onto the display area 5 based on the video data. The display driver 1021 can be configured, for example, by a circuit mounted on a circuit board.

[0043] The light source drive unit 1022 drives the light source 20 to generate light. Based on the drive from the light source drive unit 1022, the light source 20 generates light and supplies it to the display panel 11. Based on vehicle information 4 received via the communication unit 1014, or information from a terminal device, the light source 20 is adjusted or controlled using the light source drive unit 1022, which is the driver used to drive the light source.

[0044] In addition, the display device 1 may protect the display panel 11 based on external light information from the illuminance sensor 905 or the like. That is, in order to prevent sunlight from hitting the display panel 11 and burning the display panel 11, the display device 1 may perform an operation of protecting the display panel 11 from sunlight according to the value of the illuminance sensor 905. More specifically, when the intensity of the external light or sunlight acquired by the illuminance sensor 905 is strong and there is a risk of burning out the display panel 11, the brightness of the light source 20 is reduced, and the amount of light from the light source 20 incident on the display panel 11 is suppressed, thereby suppressing the temperature rise of the display panel 11.

[0045] Each part of FIG. 3 may be implemented by a dedicated circuit such as an FPGA (Field Programmable Gate Array) as appropriate. In the present embodiment, the configuration has a non-volatile memory 1011, a volatile memory 1012, a storage unit 1013, and a video processing unit 1016, respectively, but the above processing may be made to function by one memory.

[0046] Next, the video display unit 200 will be specifically described. The video display unit 200 projects video light of the video formed on the display panel 11 using the light emitted from the light source 20 (in other words, the light source light) based on the video data. The video display unit may be referred to as a projection type video display device or a projector. The video display unit 200 includes a light source 20 and a display panel 11 such as a liquid crystal panel LCD (Liquid Crystal Display) having a video display element.

[0047] The light source 20 functions as a backlight source of the display panel 11. The light source 20 is configured using, for example, a semiconductor light source element, generates predetermined light source light, and supplies it to the display panel 11. Typically, an LED (Light Emitting Diode) element is used as the semiconductor light source element. The light source 20 may have a configuration in which a plurality of light sources are arranged. A light source unit (backlight unit) 12 described later may be configured using the light source 20 or the like.

[0048] The display panel 11 generates and emits modulated video light based on the light source light. That is, the display panel 11 forms and displays a video on the display screen based on video data, and generates and emits video light corresponding to the video based on the light from the light source 20. The video data in the present embodiment will be described as the video data input from the video processing unit 1016. The display panel 11 modulates the light from the light source 20 for each pixel according to the video data, forms a video for projection onto the display area 5, and projects it as video light (or projection light).

[0049] Also, the display panel 11 may be a screen plate having a diffusion function, not limited to a liquid crystal panel. As a means for projecting a video onto a screen plate having a diffusion function, means such as a DMD (Digital Micromirror Device) or a means for projecting an image of a liquid crystal panel in combination with a projection lens, or a means using a Micro Electro Mechanical Systems (MEMS) may be used.

[0050] FIGS. 4 and 5 are diagrams showing a configuration example in which the display device 1 is mounted on the vehicle 2. FIG. 4 shows an example in which the display device 1 is mounted on a passenger car. The passenger car is a sports car, sedan, SUV (Sport Utility Vehicle), minivan, etc. in which the angle of the front glass 3 is 20° to 45° with respect to the Y-axis (the front-rear direction or the traveling direction of the vehicle 2). FIG. 5 shows an example in which the display device 1 is mounted on some passenger cars and commercial vehicles. In other words, the windshield or the front glass 3 in FIG. 5 is in a raised state. Specifically, it is a light super high wagon, truck, or bus in which the angle of the front glass 3 is 45° to 90° with respect to the Y-axis (the front-rear direction or the traveling direction of the vehicle 2). As shown in FIGS. 4 and 5, the display device 1 is disposed on the dashboard 7 of the vehicle 2. The display device 1 may be mounted so as to be embedded in the dashboard 7. The dashboard 7 also includes an instrument panel including a meter cluster, for example, in front of the steering wheel.

[0051] As shown in Figures 4 and 5, the image light 13 in Figure 4 is emitted toward the driver, and the image light 13 in Figure 5 is emitted toward the windshield 3. The image light 13 emitted from the display device 1 is reflected when it is irradiated onto the windshield or windshield 3. The reflected image light 13 is incident on the driver's viewpoint 14. From the driver's viewpoint 14, a virtual image 10 corresponding to the image light 13 is formed and visible at a position visible through the display area 5 (Figure 1) of the display device 1 corresponding to the irradiation area of ​​the image light 13. In this embodiment, the projection of image light onto the display area 5 of the windshield 3 is described, but the projection unit that projects the image light may be a projection member other than the windshield 3.

[0052] Figure 6 shows the video display unit 200 of the display device 1. The light source unit 12 may also be called the backlight unit. The light source unit 12 includes a light source 20, a reflective mirror 21, a polarization conversion element 22, and a light guide unit 23, and may also include a diffuser plate 24. The reflective mirror 21 is used to reflect light from the light source 20 and adjust it to parallel light. The reflective surface of the reflective mirror 21 is a parabolic surface and may be asymmetrical with respect to the optical axis of the light emitted from the light source 20. The reflective mirror 21 may also be positioned eccentrically with respect to the light source 20. The reflective mirror 21 may also be called a reflector.

[0053] The polarization conversion element 22 is composed of a polarizing beam splitter (PBS) and a phase difference film (1 / 2λ). It separates incident light into S-polarized and P-polarized light, and then uses the phase difference film (1 / 2λ) to polarize either the separated S-polarized or P-polarized light, so that the randomly polarized light incident on the polarization conversion element 22 is emitted as linearly polarized light.

[0054] The light guide section 23 may also be called an optical transmission section. The light guide section 23 is configured to adjust the angle of incidence of light rays to the display panel 11, and in this example, it is configured using an optical reflecting section 23a having a prism shape (a jagged shape). The light guide section 23 may also be a prism sheet as an example. In this example, the light rays incident on the optical reflecting section 23a of the light guide section 23 are adjusted to a predetermined light distribution and reflected toward the display panel 11. The distribution of light incident on the display panel 11 can be adjusted by the shape of the reflective surface of the optical reflecting section 23a, the inclination of the reflective surface, the surface roughness, etc. In this structure, the optical axis of the light source 20 and the optical axis of the light incident on the display panel 11 are parallel or approximately parallel.

[0055] The light guide 23 is, for example, a resin member having a prism shape, and the prism-shaped portion that becomes the reflective surface is coated with an Al reflective film or the like. The light reflective portion 23a of the light guide 23 may be configured to have multiple inclinations on one surface in order to achieve more precise adjustment of reflected light. Furthermore, the reflective surface may be composed of multiple or multifaceted surfaces, or it may be composed of curved surfaces. When a large number of reflective surfaces and connecting surfaces are alternately formed in a sawtooth pattern on the light reflective portion 23a, the light incident on the light guide 23 is reflected on each reflective surface and directed toward the display panel 11, and further adjusted to a predetermined light distribution characteristic via the diffuser plate 24 before incident on the display panel 11. The diffuser plate 24 uniformly disperses the incident light from the light guide 23. The diffuser plate 24 has the effect of improving the brightness uniformity within the virtual image plane.

[0056] Furthermore, the video display unit 200 may have a configuration other than that shown in Figure 6, and may, for example, include a light source, an illumination optical system, a PBS or polarization separation element, and a reflective liquid crystal panel or LCOS.

[0057] Next, an example of the layout of the image display by the display device 1 will be described with reference to Figure 7. As shown in Figure 7, the display device 1 can display an image in the display area 5 of the projection member (in this case, the windshield 3). Here, the image may be displayed in multiple display areas 5. In addition, the image may be displayed in display areas 5 at different height levels in the vertical direction of the vehicle. In addition, the image may be displayed in display areas 5 at different positions in the vehicle width direction (X direction).

[0058] Next, an example of video display control will be described with reference to Figure 8. In this embodiment, the main control unit is the processor. The processor is configured using, for example, the control unit 1010 of the display device 1. However, it is not limited to this, and the processor may be configured using, for example, other semiconductor devices such as ECUs and GPUs, the controller of the vehicle 2, or the control unit of external equipment.

[0059] The processor acquires vehicle driving conditions related to the vehicle's movement (S11). The processor acquires vehicle driving conditions, for example, from sensors mounted on the vehicle or through communication with an external source, and controls the display of vehicle driving information based on the acquired vehicle driving conditions (S12). In step 13, the display area 5 displays images related to the acquired vehicle driving information. Here, vehicle driving conditions are, for example, information regarding whether vehicle 2 is stopped or whether vehicle 2 is moving.

[0060] Subsequently, the processor acquires the vehicle driving conditions and determines whether a display change is necessary based on the change in the vehicle driving conditions (S14). The processor performs display control based on the result of the determination, and the display area 5 displays an image based on the result of the determination (S15). For example, if vehicle 2 is stopped, an image indicating that it is stopped is displayed, and if vehicle 2 is moving, an image indicating that it is moving is displayed.

[0061] Next, an example of a basic screen configuration will be explained with reference to Figures 9 and 10. Figure 9 shows the display while the vehicle is stationary, and Figure 10 shows the display while the vehicle is in motion.

[0062] First, the display while stopped will be explained with reference to Figure 9. The display device 1 can display a rest icon 210, cumulative rest time 220, remaining driving time 230, terminal connection icon 240A, driving information connection icon 250A, current time 310, rest warning icon 410A, and driving road type 420 on the screen 201 displayed in the display area 5. The screen 201 may also be called the BMD (Bright Mirror Display) screen 201.

[0063] The rest icon 210 is displayed, for example, in the upper section of the display screen 201, and the cumulative rest time 220 is displayed, for example, next to the rest icon 210. The cumulative rest time 220 indicates the cumulative amount of rest time taken by the driver, and the rest icon 210 is an icon that visually represents the contents of the cumulative rest time 220 in an easy-to-understand manner.

[0064] The rest icon 210 may be a shape representing a container (in this example, a cup). The rest icon 210 may also be displayed so that the liquid level in the container rises as the cumulative rest time 220 increases. The driver can easily grasp the cumulative rest time 220 by checking this shape representing a container.

[0065] The drivable time 230 is displayed, for example, in the upper section of the display screen 201. The drivable time 230 indicates the amount of time the driver is permitted to drive continuously. In other words, when driving continuously for a predetermined time or longer, it may be necessary to take a break of a certain length of time within or immediately after the predetermined time, based on laws and regulations. Therefore, by visually checking the drivable time 230, the driver can understand how much time they are permitted to drive continuously. In addition, if only breaks of a predetermined length or less (for example, refueling) are taken, the drivable time 230 may be the total driving time.

[0066] The remaining operating time 230 may be displayed as a numerical value. Alternatively, the remaining operating time 230 may be displayed as a graphic. For example, the remaining operating time 230 may be displayed as a clock graphic, with the hands of the clock indicating the amount of time that can be operated continuously.

[0067] The terminal connection icon 240A and the driving information connection icon 250A are displayed, for example, in the upper part of the display screen 201. The terminal connection icon 240A is an icon that indicates whether the display device 1 and an external terminal (e.g., a smartphone) are connected in a communicative manner. The driving information connection icon 250A is an icon that indicates whether it is possible to acquire driving information. Driving information is information related to vehicle driving, such as vehicle driving conditions, vehicle speed, and current time. The processor may acquire driving information from a GPS device, terminal, or vehicle-mounted components (vehicle speed sensor 901, GPS receiver, car navigation system, etc.) as described later.

[0068] The current time 310 indicates the current time and, as an example, is displayed in the middle of the display screen 201.

[0069] The rest warning icon 410A is displayed, for example, in the lower section of the display screen 201. The rest warning icon 410A is an icon that prompts the driver to take a rest. The processor may display the rest warning icon 410A on the display device 1 when it determines that the remaining driving time 230 has fallen below a predetermined time. In other words, the rest warning icon 410A may be displayed on the display device 1 when the remaining driving time until the predetermined driving time that the driver can drive becomes shorter than a predetermined threshold time, or falls below a predetermined threshold time.

[0070] The road type icon 420 indicates the type of road on which vehicle 2 is parked or traveling. In this example, displaying the "highway" icon indicates that vehicle 2 is located on a highway, while not displaying the icon indicates that vehicle 2 is located on a road other than a highway, such as a regular road.

[0071] For example, when vehicle 2 passes through an ETC gate and the processor acquires information that vehicle 2 has entered a highway, the processor may determine that vehicle 2 is located on a highway and display this icon on the display device 1. Also, for example, when vehicle 2 passes through an ETC gate and the processor acquires information that vehicle 2 has left a highway, the processor may determine that vehicle 2 is located on a general road and control the display device 1 so that this icon is not displayed. Furthermore, the processor may switch the display / hide of icons related to the road being traveled depending on whether the vehicle is traveling on a general road or a highway.

[0072] Alternatively, the driver may input information, and the processor may acquire the information entered by the driver and switch the display / hide status of this icon. The driver may use the operation input unit 1017 for inputting information. Alternatively, the driver may use an external terminal connected to the display device 1 for inputting information. The display device 1 may also be equipped with a manual switch that can be switched ON / OFF by the driver or others, and is used to switch the display / hide status of the icon. The processor may acquire the ON / OFF information of this manual switch and switch the display / hide status of the icon accordingly. Furthermore, the processor can switch the display / emergency status of the icon based on voice information acquired by the microphone.

[0073] Next, the display during driving will be explained with reference to Figure 10. The display device 1 can basically display the same information on the BMD screen 201 as when the vehicle is stopped, as described above. However, when driving, the display device 1 can display the vehicle speed 340 instead of the current time 310. The display device 1 can also display the vehicle speed unit 430. Here, the vehicle speed 340 represents the numerical value of the vehicle's speed, and the vehicle speed unit 430 represents the unit of the vehicle's speed. In addition, the display device 1 basically hides the rest warning icon 410A when driving.

[0074] Furthermore, the display device 1 can display a truck icon 260 and a three-line mark 260A instead of the drivable time 230. The truck icon 260 represents vehicle 2, and the three-line mark 260A is a mark indicating that vehicle 2 is in motion. As will be described later, the display positions of the truck icon 260 and the three-line mark 260A move according to the vehicle's driving time, but the three-line mark 260A may also be changed.

[0075] In this example, the icon is truck 260, but it is sufficient to indicate vehicle 2, and it may be changed to an icon that indicates another vehicle in motion. For example, if vehicle 2 is a truck, the truck icon 260 may be displayed; if it is another vehicle, the corresponding vehicle icon may be displayed. Also, in this example, the three-line mark 260A is used, but it is sufficient to indicate that vehicle 2 is in motion, and it may be changed.

[0076] Next, referring to Figure 11, an example of the display when the vehicle has been driven continuously for more than 30 minutes and is stopped on a public road will be explained. Note that Figure 11 shows the case where the driver has not taken a break up to this point (i.e., until this display screen is output). When the vehicle stops, the display in the center of the BMD screen 201 of the display device 1 changes the driving speed value to time.

[0077] Display device 1 basically displays information in the same way as described above. In this example, the driving information connection icon 250B is displayed in the same way as the driving information connection icon 250A. However, depending on the driving time of vehicle 2, the display position of the truck icon 260 moves forward (to the right on the BMD screen 201 in this example), and display device 1 displays the truck icon 260 at this display position.

[0078] Furthermore, the display device 1 displays a dust cloud mark 260B behind the track icon 260. The dust cloud mark 260B indicates the driving time since the start of continuous driving by the driver, according to the number of dust clouds. Continuous driving in this embodiment includes driving with a rest period shorter than a predetermined time. For example, if the pre-set rest period is 30 minutes and driving resumes after a 10-minute break, that driving is considered continuous driving. Note that it is sufficient to indicate the driving time since the start of continuous driving by the driver, and a display other than the dust cloud mark 260B may be used.

[0079] Next, referring to Figure 12, we will explain an example of a display when driving on a public road for a continuous period of 30 minutes or more but less than 3 hours. Note that Figure 12 shows the case where the driver has not taken a break up to this point.

[0080] Display device 1 basically displays the same information as described above. Also, similarly to the above, the display position of the truck icon 260 moves forward (to the right on the BMD screen 201 in this example) according to the driving time of vehicle 2, and display device 1 displays the truck icon 260 at this display position. Display device 1 also displays a dust cloud mark 260B. Display device 1 also displays a three-line mark 260A indicating that the vehicle is in motion.

[0081] When the vehicle is in motion, the display device 1 displays the vehicle speed 320 instead of the current time 310. Here, the display device 1 may display the vehicle speed 320 as an integer. Alternatively, the display device 1 may display the vehicle speed 320 to a decimal point (for example, to one decimal place). The driver can input which display to show using the operation input unit 1017 or an external terminal connected to the display device 1. The processor then acquires the driver's setting and controls the display device 1 to display the corresponding information.

[0082] Next, as a first embodiment, a case in which the display device 1 is equipped with a GPS device that receives GPS signals will be described. The GPS device may be mounted on the vehicle or built into the housing of the display device 1. The processor may acquire data from this GPS device and perform processing such as display in cooperation with this GPS device. Note that redundant or repetitive explanations may be omitted.

[0083] <First Embodiment> First, an example of a vehicle speed warning display using a GPS device will be described. When the vehicle speed approaches a preset threshold speed, the display device 1 changes the color of the vehicle speed display 350 and the vehicle speed unit 440 to a warning color (for example, yellow), as shown in Figure 13, in order to issue a warning. It may also start flashing the display / hide indicator. That is, if the vehicle 2 is traveling at a speed slower than the threshold speed by a predetermined range, the display device 1 may not issue a warning and may display in a different display mode than the normal display. Here, approaching the threshold speed means, for example, that the vehicle speed is 1 to 5 km / h lower than the threshold speed. The speed values ​​from 1 to 5 km / h are preset and are not limited to these.

[0084] Furthermore, if the vehicle speed exceeds a preset threshold speed, the display device 1 may, as shown in Figure 14, stop the flashing display of the vehicle speed 350 and vehicle speed unit 440 shown in Figure 13, and display the vehicle speed 360 and vehicle speed unit 450 in a non-flashing state using the warning display color. In other words, when the vehicle 2 is traveling at a speed exceeding the threshold speed, the display device 1 displays in a different display mode than the normal display which does not issue a warning.

[0085] For example, the processor may acquire vehicle speed based on short-term changes in position obtained using a GPS device.

[0086] Next, an example of the display in this embodiment will be described. In this embodiment, the operating time and rest time during a predetermined operating period are managed. Here, the predetermined operating time and the rest time required per predetermined operating time may be set in advance before the start of operation. In this embodiment, as an example, a continuous operating time of 4 hours and a rest time of 30 minutes are set before the start of continuous operation, and a 30-minute rest is taken after 4 hours of continuous operation. The display device 1 may then display information related to this management.

[0087] In this management system, for example, if the location acquired using the GPS device changes, the processor may decide to start driving vehicle 2. If the location acquired using the GPS device does not change for a predetermined time, the processor may decide to stop driving vehicle 2. The processor may then acquire the time from the start of driving to the stop of driving as the driving time.

[0088] Furthermore, in this management, as an example, if the location acquired using the GPS device does not move for a predetermined time, the processor may determine that a break has begun, and if the location acquired using the GPS device moves, the processor may determine that a break has ended. The processor may then acquire the period from the start to the end of the break as the break time. Also, if the time from stopping operation to starting operation is less than or equal to the predetermined break time, it may not be considered a break time.

[0089] The following explains an example of the display while the vehicle is stopped, referring to Figures 15 and 16. Figure 15 shows an example of the display when the vehicle is stopped and the driver has taken a 10-minute break. Note that Figure 15 shows a situation where the driver's driving time in continuous operation is less than 30 minutes and vehicle 2 is located on a public road. Note that in this example, the current time 311 in Figure 15 and the current time 312 in Figure 16 are displayed in the same way as the current time 310.

[0090] As described above, the rest icon 210 may be a shape representing a container (in this example, a cup). Here, the amount of liquid 210B in the container is displayed to increase as the cumulative rest time 220 (Figure 13) increases. The color of the liquid in the cup may also be displayed to change according to the cumulative rest time 220. The amount of steam 210A may also be displayed to increase as the cumulative rest time 220 increases. The color of the steam 210A may also be displayed to change according to the cumulative rest time 220.

[0091] When the break time is 0 minutes, an empty container without liquid is displayed, but when the break time is 10 minutes, a container with liquid is displayed. Then, when the set break time is reached, the container may be displayed as being filled with liquid.

[0092] The display may show the liquid level gradually rising according to the rest period. Alternatively, the display may show the liquid level rising in stages according to the rest period. For example, the display may show the liquid level rising in stages every 10 minutes, and the display may show that the container is full after 30 minutes.

[0093] The display may show the steam 210A and the liquid changing color gradually according to the rest period. Alternatively, the display may show the steam 210A and the liquid changing color at predetermined intervals. For example, the display may show the colors changing every 10 minutes.

[0094] The display may show that the steam 210A gradually increases in proportion to the rest period. Alternatively, the display may show that the steam 210A increases in stages in proportion to the rest period. For example, the display may show that the steam 210A increases in stages every 10 minutes.

[0095] Figure 16 shows an example of a display when the vehicle is stopped and the driver takes a 30-minute break. Note that Figure 16 also shows a situation where the driver's driving time during continuous operation is less than 30 minutes and vehicle 2 is located on a public road. Furthermore, Figure 16 shows a situation where the driver has taken the required break time per set continuous driving period.

[0096] As shown in Figure 16, when the driver takes the required break time for continuous operation, a container filled with liquid is displayed. The display device 1 then displays a check mark 222 indicating that the break time has been completed. The display device 1 may also hide the cumulative break time 221 in Figure 15 along with displaying the check mark 222.

[0097] Next, with reference to Figures 17 and 18, we will explain examples of displays when the continuous rest period does not exceed a predetermined time. Figure 17 shows an example of a display when the vehicle is stopped and the driver has taken a rest of less than 10 minutes. Figure 18 shows an example of a display when the vehicle starts moving while the driver's rest period is less than 10 minutes. Figures 17 and 18 show situations where the driver's driving time during continuous operation is 30 minutes or more but less than 3 hours.

[0098] On the BMD screen 201, while vehicle 2 is in motion, the three-line mark 260A, vehicle speed 320, etc. are displayed. However, when vehicle 2 stops, as shown in Figure 17, the three-line mark 260A disappears, and the current time 310 is displayed instead of the vehicle speed and vehicle speed unit, meaning that the information related to vehicle movement is changed to time information. In addition, the BMD screen 201 displays, for example, a rest icon 210 indicating that the accumulated rest time is 9 minutes, and the accumulated rest time 220.

[0099] If the continuous rest period is 9 minutes and does not exceed a predetermined time (10 minutes in this example), and the vehicle 2 is driven, the rest period immediately preceding the driving is treated as invalid. Then, as shown in Figure 18, the display device 1 displays a rest icon 210 indicating the accumulated rest period before the invalidated rest (0 minutes in this example) and the accumulated rest period 220. In this way, if the continuous rest period is less than the predetermined time, this rest period may be treated as invalid.

[0100] Furthermore, as shown in Figure 17, when vehicle 2 is stopped, the current time 310 is displayed. However, as shown in Figure 18, depending on the movement of vehicle 2, a three-line mark 260A is displayed, and instead of the current time 310 in Figure 17, the vehicle speed 320 and vehicle speed unit 430 in Figure 18 are displayed.

[0101] As described above, the display device 1 displays the driving information connection icon 250B. Here, if the processor is unable to acquire driving information, it may change the display form of the driving information connection icon 250B. For example, if the vehicle 2 is located underground in a building, in a mountainous area, or inside a tunnel, and the GPS device cannot receive GPS signals well, and the processor cannot acquire driving information, the processor may change the display form of the driving information connection icon 250B. For example, when driving information can be acquired, the display device 1 may display a colored driving information connection icon 250B, and when driving information cannot be acquired, it may display a contour-shaped driving information connection icon 250B as shown in Figure 18. The processor may also display another indication that driving information cannot be acquired. For example, as shown in Figure 18, when driving information cannot be acquired, the display device 1 may display a mark 280B (an "x" mark in this example) indicating that driving information cannot be acquired.

[0102] Next, with reference to Figures 19-20, we will explain examples of displays when the continuous driving time exceeds 3 hours. Figure 19 shows an example of a display when the vehicle is stopped and the continuous driving time is 3 hours or more. Figure 20 shows an example of a display when the vehicle is moving and the continuous driving time is 4 hours or more. Note that Figures 19 and 20 show a situation where the driver has not taken a rest break up to that point.

[0103] If the processor determines that the operating time has exceeded a preset threshold time (3 hours in this example) during continuous operation, the display device 1 will display the remaining operating time 230 instead of the track icon 260 in Figure 18, as shown in Figures 19 and 20. Here, the remaining operating time 230 corresponds to the remaining time until the preset continuous operating time (4 hours in this example). The processor may also obtain the remaining operating time 230 from the difference between the preset continuous operating time and the acquired operating time.

[0104] The display device 1 may also display the remaining driving time 230 in one-minute increments. Furthermore, when the vehicle 2 is in motion, the display device 1 may decrease the remaining driving time 230 by one minute for every minute the vehicle 2 is in motion.

[0105] Furthermore, if the processor determines that the driving time has exceeded a preset threshold time (3 hours in this example), the display device 1 may display a rest warning icon 410A while the vehicle 2 is in motion.

[0106] Next, as a second embodiment, we will describe a case in which the device performs display and other processing in cooperation with an external terminal. The display device 1 is connected to an external terminal (for example, a smartphone) via communication (for example, BLT connection). Note that redundant or repetitive explanations may be omitted.

[0107] <Second Embodiment> The processor can acquire data from an external terminal and cooperate with the external terminal to control the video display. The processor may acquire and process data such as data acquired by a GPS device installed in the external terminal, current time data, and video display data. For example, when the vehicle 2 is stopped, the processor may display the current time 310 on the display device 1 based on data acquired from the external terminal. Alternatively, the processor may display the vehicle speed 340 on the display device 1 based on data acquired from the GPS device of the external terminal, or vehicle speed data acquired from the external terminal. As shown in Figures 21 and 22, the display device 1 can basically display the same information as in the first embodiment, except for the addition of the terminal connection icon 240A. A vehicle speed warning display as described in the first embodiment may also be displayed.

[0108] If the processor determines that there is no connection to an external terminal, the display device 1 displays the terminal connection icon 240A. If the processor determines that there is no connection to an external terminal, the display device 1 either does not display the terminal connection icon 240A or changes the terminal connection icon 240A to another terminal connection icon.

[0109] Furthermore, the display form (size, shape, color, etc.) of the driving information connection icon may be changed depending on whether the system is linked with a GPS device or an external terminal, as described in the first embodiment. The display device 1 may, for example, display the driving information connection icon in a different color depending on whether it is linked with a GPS device or an external terminal. For example, the display device 1 may display a white arrow driving information connection icon when linked with a GPS device, and a blue arrow driving information connection icon when linked with an external terminal.

[0110] The processor can acquire driving information from an external terminal when coordinating with the external terminal. In this case, if the processor is unable to acquire driving information, it may display a driving information connection icon 250A or a mark 280B (in this example, an "X" mark) on the display device 1 to indicate that driving information cannot be acquired.

[0111] Next, as a third embodiment, we will describe a case in which processing is performed in cooperation with an external terminal. The display device 1 is connected to an external terminal (for example, a smartphone) via communication (for example, BLT connection). Note that redundant or repetitive explanations may be omitted.

[0112] <Third Embodiment> The processor may acquire data from an external terminal, cooperate with the external terminal to control the video display, and based on the data acquired from the external terminal, display navigation information (TbyT (Turn by Turn), DtoT (Distance to Turn) regarding the distance to the guidance point, road name display, estimated arrival time, etc.) on the display device 1.

[0113] The BMD screen 201 is displayed in three sections: upper, middle, and lower, and the display differs depending on the distance to the next guidance point and whether vehicle 2 is moving or stopped. Figure 23 shows an example of the display when vehicle 2 is moving and the distance to the next guidance point (intersection, fork, etc.) is 1 km or more. Figure 24 shows an example of the display when vehicle 2 is moving and the distance to the next guidance point (intersection, fork, etc.) is less than 1 km. Figure 25 shows an example of the display when vehicle 2 is moving and the distance to the next guidance point (intersection, fork, etc.) is 200 m or less. Figure 26 shows an example of the display when vehicle 2 is moving and the distance to the next guidance point (intersection, fork, etc.) is 100 m or less.

[0114] As shown in Figure 23, the upper section of the BMD screen 201 displays the current time 290, a terminal connection icon 240A, and a driving information connection icon 280A. The type of road being driven on is also displayed. The middle section of the BMD screen 201 displays the distance to the guidance point (intersection, junction, etc.) 360A and distance unit 361, and a direction of travel icon 351A indicating the direction of travel. The lower section of the BMD screen 201 displays the vehicle speed 440A and the vehicle speed unit 430.

[0115] As shown in Figure 24, the upper section of the BMD screen 201 displays a terminal connection icon 240A and a driving information connection icon 280A. The middle section of the BMD screen 201 displays the distance 362 and distance unit 363 to the guidance point (intersection, junction, etc.), and a direction of travel icon 351B indicating the direction of travel. Note that, as an example, the direction of travel icon 351B in Figure 24 may be displayed larger than the direction of travel icon 351A (Figure 23) when the distance to the guidance point is 1 km or more. The direction of travel icon 351B may, for example, be displayed so as to span across the upper section of the BMD screen 201. Also, the distance 362 and distance unit 363 may be displayed larger than, as an example, the distance 360A and distance unit 361 when the distance to the guidance point is 1 km or more. The lower section of the BMD screen 201 displays the next guidance point name 450A (intersection name, road name, etc.).

[0116] As shown in Figure 25, the same display as when the distance to the next guidance point (intersection, junction, etc.) is less than 1 km is shown, and the distance to the guidance point 362A is displayed. Furthermore, an indicator 500A is displayed on the display device 1. For example, the indicator 500A is bar-shaped and is displayed so as to extend vertically across the BMD screen 201 at the edge of the BMD screen 201 (in this example, the left edge of the screen). Also, for example, the indicator 500A can be displayed in blue. The name of the next guidance point 451 (intersection name, road name, etc.) is displayed on the lower part of the BMD screen 201.

[0117] As shown in Figure 26, the same display as when the distance to the guidance point (intersection, junction, etc.) is 200m or less is shown, and the distance to the guidance point, such as 362B, is displayed. In addition, an indicator 500B (Figure 26), which is shorter in dimensions than the indicator 500A in Figure 25, is displayed. Here, the indicator may also be displayed as it gets shorter as the distance to the guidance point decreases. Alternatively, the length of the indicator may be displayed in stages at predetermined distances. For example, the display device 1 may display the indicator when the distance to the guidance point is 200m, display the indicator without changing its length when the distance to the guidance point is more than 100m but less than 200m, and display the indicator with a shortened length when the distance to the guidance point is 100m.

[0118] Figure 27 shows an example of the display when vehicle 2 is in motion. As shown in Figure 27, the upper part of the BMD screen 201 displays the date 291, current time 290, terminal connection icon 240, driving information connection icon 280A, and driving road type 292. The middle part of the BMD screen 201 displays the distance 360A and distance unit 361 to the guidance point (intersection, fork, etc.), and the direction of travel icon 351A. The lower part of the BMD screen 201 displays the estimated arrival time 460, indicating that it is a display related to the estimated arrival time to the final destination, and the estimated arrival time to the final destination 470.

[0119] Similar to the second embodiment, the processor may acquire and process data such as data obtained by a GPS device installed in an external terminal, current time data, and video display data. The processor may also acquire and process navigation-related data or data used to generate navigation information from an external terminal.

[0120] Next, as a fourth embodiment, we will describe a case in which a signal is received from a beacon and a warning is displayed. For example, the beacon is installed in advance at a location where a warning is to be issued, and a warning is displayed when approaching that location. The processor acquires the signal from the beacon and processes it. This signal from the beacon is acquired via communication (for example, BLE-based communication). Note that redundant or repetitive explanations may be omitted.

[0121] <Fourth Embodiment> Figure 28 shows an example of a display when a signal from a beacon cannot be received. When a beacon signal cannot be received, when the ID is not that of the beacon that the processor processes, or when the system transitions to such a situation, the beacon unreceived indicator 600A is displayed. The beacon unreceived indicator 600A is a predetermined fixed character, icon, mark, etc., and is displayed on the BMD screen 201, for example. In this example, the beacon unreceived indicator 600A is the fixed character "Caution: Surroundings" and is displayed on the lower part of the BMD screen 201, but it may also be displayed on the middle or upper part of the BMD screen 201.

[0122] Figure 29 shows an example of a display when receiving a signal from a beacon. When the processor acquires a beacon signal, a display corresponding to the beacon signal (in other words, corresponding to the beacon ID) is shown. A beacon for displaying information about traffic signs may be installed outside the vehicle, and the processor may cause the display device 1 to display a beacon reception display (610, 620, 630, 640), which is a display of related information corresponding to the received beacon signal. The beacon reception display (610, 620, 630, 640) may be displayed using icons, marks, strings of text, etc.

[0123] Next, as a fifth embodiment, a screen used for various settings, information display, etc. will be described. Note that redundant or repetitive explanations may be omitted. The driver, etc., may perform operations on the screen by operating the operation input unit 1017, for example, or operation buttons used for operations on the screen may be provided on the housing of the display device 1.

[0124] <Fifth Embodiment> Figure 30 relates to a menu screen for adjusting brightness. The upper part of the BMD screen 201 displays a menu icon 700A, a menu name 710, a terminal connection icon 240A, and a driving information connection icon 250A. The menu icon 700A is an icon used to switch menu screens, as will be described later. The menu name 710 indicates the setting content.

[0125] The middle section of the BMD screen 201 displays the menu information / settings 711, which is used for settings. The menu information / settings 711 includes "+" and "-" indicators, and by operating these "+" and "-" indicators, the brightness of the display can be set in 1 to 9 steps. In this example, the display screen becomes brighter as you move from step 1 to step 9. The bottom section of the BMD screen 201 displays the current time 712.

[0126] Figure 31 relates to a menu screen for setting the number of vehicle speed pulses. In the above embodiment, examples of acquiring vehicle speed based on minute changes in GPS position information and examples of acquiring vehicle speed data from an external terminal were described. In the above embodiment, the processor may acquire vehicle speed pulses (vehicle speed pulse frequency) from components mounted on the vehicle (vehicle speed sensor 901, controller 100, etc.) and display the vehicle speed based on the acquired vehicle speed pulses on the display device 1. Therefore, the number of vehicle speed pulses used when calculating the vehicle speed from the vehicle speed pulses may be set on the menu screen. The number of vehicle speed pulses can be set from 4, 8, 16, 20, and 25, and the driver, etc., sets the number of vehicle speed pulses considering the vehicle type, the manufacturer of the vehicle 2, etc. The processor may prioritize the method of calculating the vehicle speed using the number of vehicle speed pulses over other methods (for example, the method of calculating the vehicle speed using a GPS device) and display the calculated vehicle speed on the display device 1.

[0127] The upper section of the BMD screen 201 displays a menu icon 700A, a menu name 720, a terminal connection icon 240A, and a driving information connection icon 250A. The menu name 720 indicates the settings.

[0128] The middle section of the BMD screen 201 displays menu information / settings 721, which is used for settings. Menu information / settings 721 includes "+" and "-" indicators, and by operating these "+" and "-" indicators, the number of vehicle speed pulses can be set from 4, 8, 16, 20, and 25. The lower section of the BMD screen 201 displays the driving speed 722.

[0129] Figure 32A shows a menu screen for setting the Amp. value. The Amp. value is a value associated with a predetermined correction multiplier, which is used to correct the vehicle speed displayed by the display device 1 to match or approach the vehicle speed displayed by the meter of the vehicle 2. The processor displays the corrected vehicle speed, using the predetermined correction multiplier, on the display device 1.

[0130] The upper section of the BMD screen 201 displays a menu icon 700A, a menu name 730, a terminal connection icon 240A, and a driving information connection icon 250A. The menu name 730 indicates the settings.

[0131] In the middle section of the BMD screen 201, the menu information / settings 731, which is used for settings, is displayed. Menu information / settings 731 includes "+" and "-" indicators, and by operating these "+" and "-", the Amp. value can be set in 12 steps from 0 to 12. Figure 32B shows an example of the relationship between the Amp. value and the correction multiplier. In this example, the correction multiplier for Amp. 0, which is the 0th step Amp. value, is set to 1.000, and the correction multiplier increases as you move towards the 12th step. For example, if the vehicle speed displayed by the display device 1 is 40 [km / h] and the vehicle speed shown on the meter of vehicle 2 is 42 [km / h], the Amp. value is set to the 5th step, and correction is performed using the correction multiplier of Amp. 5, which is the 5th step Amp. value, so that the vehicle speed displayed by the display device 1 matches the vehicle speed shown on the meter of vehicle 2. In addition, the vehicle speed 732 is displayed in the lower section of the BMD screen 201.

[0132] Figure 33 shows the menu screen for configuring the vehicle speed warning display. In the upper section of the BMD screen 201, the menu icon 700A, menu name 740, terminal connection icon 240A, and driving information connection icon 250A are displayed from left to right in the vehicle width direction. The menu name 740 indicates the setting content.

[0133] In the middle section of the BMD screen 201, the menu information / settings 741, which is used for settings, is displayed. Menu information / settings 741 includes "+" and "-" indicators, and by operating these "+" and "-", the offset value from the threshold speed for warning display can be set in 1 to 5 steps within the range of -1 [km / h] to -5 [km / h]. For example, if the offset value is set to -5 [km / h], when the vehicle speed falls to -5 [km / h] from the threshold speed, the vehicle speed display and the color of the vehicle speed unit will change to the warning display color (for example, yellow), and the display / hide blinking will begin. Therefore, it is possible to set the speed range at which a warning is displayed when the vehicle speed approaches the threshold speed. In addition, the current time 742 is displayed in the lower section of the BMD screen 201.

[0134] The speed thresholds for displaying warnings are set separately for when Vehicle 2 is traveling on a regular road and when Vehicle 2 is traveling on a highway. The threshold used for regular roads is set in advance and, for example, is set (fixed) to 60 km / h. The threshold used for highways is set using the menu screen shown in Figure 34 as an example. The processor may also determine whether Vehicle 2 is traveling on a regular road or a highway based on information such as ETC gate passage, information entered by the driver, and the status of the road type icon 420 (illuminated / unilluminated), and decide which threshold to use for processing the warning display.

[0135] Figure 34 shows a menu screen for configuring vehicle speed warning displays, and more specifically, a menu screen for setting the threshold for vehicle speed warning displays when vehicle 2 is traveling on a highway. The upper part of the BMD screen 201 displays a menu icon 700A, a menu name 750, a terminal connection icon 240A, and a driving information connection icon 250A. The menu name 750 indicates the setting content.

[0136] The middle section of the BMD screen 201 displays Menu Information / Settings 751, which is used for settings. Menu Information / Settings 751 includes "+" and "-" indicators, and by operating these "+" and "-" indicators, the threshold for use on highways can be set in increments of 10 km / h within the range of 30 km / h to 120 km / h. Note that 30 km / h to 70 km / h is for special purposes. The lower section of the BMD screen 201 displays the current time 752.

[0137] Figure 35 shows the menu screen for setting the theme displayed by the display device 1. The upper part of the BMD screen 201 displays a menu icon 700A, a menu name 760, a terminal connection icon 240A, and a driving information connection icon 250A. The menu name 760 indicates the setting content.

[0138] In the middle section of the BMD screen 201, menu information / settings 761, which is used for settings, is displayed. Menu information / settings 761 includes the symbols "+" and "-", and by operating these symbols, themes 1, 2, 3, or 4 can be set. For example, when setting theme 1, the display device 1 displays information based on cooperation with a GPS device according to the first embodiment. When setting theme 2, the display device 1 displays information based on cooperation with an external terminal according to the second embodiment. When setting theme 3, the display device 1 displays navigation information according to the third embodiment. When setting theme 4, the display device 1 displays information based on beacons according to the fourth embodiment. In addition, the current time 762 is displayed in the lower section of the BMD screen 201.

[0139] Figure 36 is a menu screen that displays information (sometimes called an information display menu screen), and it is a screen that displays the driving status. The upper part of the BMD screen 201 displays a menu icon 700A, a menu name 770A, a terminal connection icon 240A, and a driving information connection icon 250A. The menu name 770A indicates the content of the information to be displayed.

[0140] The middle section of the BMD screen 201 displays Menu Information / Settings 771. Menu Information / Settings 771 includes "+" and "-" indicators, and by operating these "+" and "-", screen transitions are possible, as described later. Menu Information / Settings 771 displays the driving status, including rest time during continuous driving and cumulative driving time since the start of continuous driving. The lower section of the BMD screen 201 displays the current time 772.

[0141] Figure 37 is an information display menu screen, which shows the available configurations. The upper part of the BMD screen 201 displays a menu icon 700A, a menu name 770B, a terminal connection icon 240A, and a driving information connection icon 250A. The menu name 770B indicates the content of the information to be displayed.

[0142] The middle section of the BMD screen 201 displays menu information / settings 775. Menu information / settings 775 includes "+" and "-" indicators, and by operating these "+" and "-", screen transitions are possible, as described later. Menu information / settings 775 presents the available configurations. In this example, it is shown that "Bluetooth", "GPS" (GPS device), and "ETC" are available for use on display device 1, and that "vehicle speed pulse" is unavailable for use on display device 1. The lower section of the BMD screen 201 displays the current time 772.

[0143] Figure 38 shows the information display menu screen, which displays the version of the program used for processing by the processor. The upper part of the BMD screen 201 displays the menu icon 700A, the menu name 770C, the terminal connection icon 240A, and the driving information connection icon 250A. The menu name 770C indicates the content of the information to be displayed.

[0144] The middle section of the BMD screen 201 displays Menu Information / Settings 776. Menu Information / Settings 776 includes "+" and "-" symbols, and by operating these "+" and "-" symbols, screen transitions are possible, as described later. Menu Information / Settings 776 displays the version of the program used for processing by the processor. The lower section of the BMD screen 201 displays the current time 772.

[0145] Figure 39 is an information display menu screen, which displays devices that are connected and capable of communication. The upper part of the BMD screen 201 displays a menu icon 700A, a menu name 770D, a terminal connection icon 240A, and a driving information connection icon 250A. The menu name 770D indicates the content of the information to be displayed.

[0146] The middle section of the BMD screen 201 displays Menu Information / Settings 777. Menu Information / Settings 777 includes "+" and "-" indicators, and by operating these "+" and "-", screen transitions are possible, as described later. Menu Information / Settings 777 displays, for example, the names of devices that are connected and able to communicate. The communication standard may also be displayed; in this example, it indicates that the device is connected to a smartphone and is communicating via Bluetooth. The bottom section of the BMD screen 201 displays the current time 772.

[0147] Figure 40 shows the information display menu screen, which displays the MAC addresses of devices that are connected for communication. The upper part of the BMD screen 201 displays the menu icon 700A, the menu name 770E, the terminal connection icon 240A, and the driving information connection icon 250A. The menu name 770E indicates the content of the information to be displayed.

[0148] The middle section of the BMD screen 201 displays Menu Information / Settings 778. Menu Information / Settings 778 includes "+" and "-" symbols, and by operating these "+" and "-", screen transitions are possible, as described later. Menu Information / Settings 778 displays the MAC addresses of devices that are connected for communication. The lower section of the BMD screen 201 displays the current time 772.

[0149] The menu screen used for the various settings described above can be accessed, for example, by the driver operating the operation input unit 1017. The driver can then operate the operation input unit 1017 while viewing the menu screen to perform various settings through operations on the menu screen. If there is no operation on the menu screen for a predetermined time (for example, 10 seconds), it may transition to a normal screen that displays information based on the driving conditions of the vehicle 2. Alternatively, it may transition to a normal screen that displays information based on the beacon signal. Furthermore, the "+" and "-" operations on the menu screen may be reflected immediately. In addition, the settings made using the menu screen may be saved even if the ignition switch of the vehicle 2, the start switch (key switch) of an electric vehicle, etc. are turned OFF.

[0150] On the menu screen, the driver or other user may activate the menu switch 701 by operating the menu icon 700A, which may transition to another menu screen. Here, for example, the system may be configured so that each time the menu icon 700A is operated, the menu screens transition in a predetermined order. For example, by operating the menu icon 700A on the brightness adjustment menu screen, the system may transition to the menu screen for setting the number of vehicle speed pulses; by operating the menu icon 700A on that menu screen, the system may transition to the menu screen for setting the Amp. value; by operating the menu icon 700A on that menu screen, the system may transition to the menu screen for setting the offset value from the threshold for warning display; by operating the menu icon 700A on that menu screen, the system may transition to the menu screen for setting the vehicle speed warning display threshold for highways; by operating the menu icon 700A on that menu screen, the system may transition to the menu screen for setting the theme displayed by the display device 1; and by operating the menu icon 700A on that menu screen, the system may transition to the brightness adjustment menu screen.

[0151] The information display menu screen used to present the above-mentioned information can be accessed, for example, by the driver or other operator operating the operation input unit 1017. If there is no operation on the information display menu screen for a predetermined time (for example, 10 seconds), the system may transition to a normal screen that displays information based on the driving conditions of the vehicle 2. Alternatively, the system may transition to a normal screen that displays information based on the beacon signal.

[0152] On the information display menu screen, the driver or other user may navigate to other information display menu screens by operating the "+" or "-" button in the menu information / settings. Here, for example, the system may be configured so that each time "+" or "-" is operated, the information display menu screens are navigated in a predetermined order. For example, operating "+" on the information display menu screen that displays the driving status may navigate to the information display menu screen that displays the available configurations, operating "+" on that information display menu screen may navigate to the information display menu screen that displays the program version, operating "+" on that information display menu screen may navigate to the information display menu screen that displays the devices that are connected for communication, operating "+" on that information display menu screen may navigate to the information display menu screen that displays the MAC address of the devices that are connected for communication, and operating "+" on that information display menu screen may navigate to the information display menu screen that displays the driving status.

[0153] Furthermore, by operating the menu icon 700A on the information display menu screen, the system may transition to a normal screen that displays information based on the driving conditions of vehicle 2. Alternatively, the system may transition to a normal screen that displays information based on the beacon signal.

[0154] Next, an example of a screen for setting the start of continuous operation time will be described with reference to Figure 41. The menu name 800 is displayed in the upper part of the BMD screen 201. The menu name 800 indicates the content of the information to be presented. The first reset selection button 802 and the second reset selection button 803 are displayed in the middle part of the BMD screen 201. Here, for example, by operating the first reset selection button 802, the operation time and rest time in the continuous operation time are initialized. In this example, the operation time and rest time are initialized by pressing and holding the first reset selection button 802. Also, for example, by operating the second reset selection button 803, the system transitions to a normal screen that displays information based on the driving conditions of the vehicle 2, or to a normal screen that displays information based on the beacon signal. In this example, the system transitions to the normal screen by briefly pressing the second reset selection button 803. Note that if there is no operation for a predetermined period of time, the system may transition to the normal screen.

[0155] For example, if another driver takes over driving and performs continuous driving, the continuous driving time is reset on this screen, and the new driver performs continuous driving of vehicle 2. This screen can be accessed, for example, by the driver operating the operation input unit 1017. The driver can then set the start of the continuous driving time by operating the operation input unit 1017 while viewing this screen.

[0156] The display device 1 may also output a screen for setting the continuous operating time, the rest time per continuous operating time, a predetermined time for treating rests as invalid, and a threshold time for displaying the drivable time 230. The driver or other operator may set these values ​​by operating the operation input unit 1017. On the other hand, these values ​​may also be fixed at the time of product shipment.

[0157] Although embodiments have been described above, the present invention is not limited to the embodiments described above, and includes various modifications and equivalent configurations within the spirit of the attached claims. For example, the embodiments described above are described in detail for the purpose of explaining the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described. Also, for example, some of the configurations of the embodiments may be added, deleted, or replaced with other configurations.

[0158] The processor may measure driving time and rest time using timers that measure driving time and rest time.

[0159] The processor may use data acquired by the GPS receiver 921 mounted on the vehicle to determine the speed of the vehicle 2 and perform display processing on the display device 1.

[0160] The technology described in this embodiment makes it possible to prevent traffic accidents by providing a display device that can display a good virtual image, reduces the driver's eye movement, and contributes to supporting safe driving. This contributes to the United Nations' Sustainable Development Goal (SDG), specifically "Goal 3: Ensure good health and well-being for all."

[0161] 1 Display device (virtual image display device) 11 Display panel 20 Light source

Claims

1. A display device mounted on a vehicle that projects image light, characterized in that it is capable of displaying: information regarding the remaining drivable time until a predetermined driving time, and information regarding the cumulative time of rest periods to be taken during driving for the predetermined driving time.

2. A display device according to claim 1, wherein the display device displays information relating to the cumulative time of the break time using icons.

3. A display device according to claim 1, wherein the display device displays information regarding the remaining operating time when the remaining operating time until a predetermined operating time becomes shorter than a predetermined threshold time, or becomes less than or equal to a predetermined threshold time.

4. A display device according to claim 1, wherein the display device displays a mark indicating the driving time from the start of driving by the driver.

5. A display device according to claim 1, wherein the display device is capable of displaying the current time and the speed of the vehicle, and when the vehicle is stopped, it displays the current time and does not display the speed of the vehicle, and when the vehicle is moving, it displays the speed of the vehicle and does not display the current time.

6. A display device according to claim 1, wherein the display device displays information relating to the type of road on which the vehicle travels.

7. A display device according to claim 1, characterized in that the display device displays a message prompting the driver to take a break when the remaining drivable time until a predetermined driving time becomes shorter than a predetermined threshold time, or falls below a predetermined threshold time.

8. A display device according to claim 1, wherein the display device is capable of displaying the speed of the vehicle, and when the vehicle is moving at a speed slower than a predetermined range below a threshold, the display device displays the speed of the vehicle in a manner that is different from the normal speed display.

9. A display device according to claim 1, wherein the display device is capable of displaying the speed of the vehicle, and when the vehicle is moving at a speed exceeding a threshold, it displays the speed of the vehicle in a manner that is different from the normal speed display.

10. A display device according to claim 1, wherein the display device displays an icon indicating whether an external terminal is connected in a communicative manner.

11. A display device according to claim 1, wherein the display device displays an icon indicating whether it is in a state where it can acquire information including whether it is stationary or moving, the speed of the moving object, and the current time.

12. A display device according to claim 1, wherein the display device comprises a GPS device for receiving GPS signals and displays the speed of the vehicle obtained based on the GPS device.

13. A display device according to claim 1, wherein the display device displays the speed of the vehicle based on data obtained from an external terminal that is connected to it for communication.

14. A display device according to claim 1, wherein the display device displays navigation information based on data obtained from an external terminal that is connected to it for communication.

15. A display device according to claim 1, wherein the display device displays information based on a received beacon signal.

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