JP2011006034A - On-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance visibility in an on-vehicle display device.SOLUTION: An on-vehicle control unit 21 displays an image in a car inside or a car outside on a vehicular window 4 via a projector 31. The image displayed on the vehicular window 4 is visible inside/outside the car, while securing high visibility even in a plurality of persons. A user can switch to a desired screen, by touch operation a screen displayed inside/outside the car on the window 4. Convenience is enhanced by allowing the touch operation for the screen displayed on the vehicular window 4.

Description

  The present invention relates to an in-vehicle display device.

  The in-vehicle display device displays map information or the like as a display unit of a car navigation device, for example. In particular, the display device is installed at a position that is easily visible from the driver seat and the passenger seat, for example, a dashboard (console box) between the driver seat and the passenger seat (see, for example, Patent Document 1).

JP 2002-264692 A

  By the way, the in-vehicle display device described in Patent Document 1 is installed on a dashboard on which a steering, an instrument panel, and the like are arranged. Therefore, the installation position of the in-vehicle display device and the size of the screen are limited, and the in-vehicle display device is not suitable for visual recognition by a large number of people.

  This invention is made | formed in view of such a situation, The objective is to provide a vehicle-mounted display apparatus with higher visibility.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
According to a first aspect of the present invention, there is provided a display device that displays an image on at least one of a vehicle inner surface or a vehicle outer surface of a vehicle window of a vehicle door, and a control device that controls a screen displayed by the display device. The gist is to prepare.

  According to this configuration, the control device can display an image on the inside or outside of the vehicle window via the display device. Thereby, even if it is multiple persons, the image of a vehicle window can be seen in the inside or outside of a vehicle, ensuring high visibility.

  According to a second aspect of the present invention, in the in-vehicle display device according to the first aspect, the vehicle-mounted display device further includes a touch sensor that detects a touch operation on the vehicle window, and the control device is configured to display the display device based on a detection result of the touch sensor. The gist is to control the screen to be displayed.

  According to this configuration, the user can switch to a desired screen by touching a screen displayed on the inside or outside of the vehicle window. Thus, the convenience of an in-vehicle display device can be improved by enabling the touch operation of the screen displayed on the vehicle window.

  According to a third aspect of the present invention, in the on-vehicle display device according to the first or second aspect, the display device is a projector device that projects an image on the vehicle window by irradiating light on the vehicle window, and the projector device The first polarization direction or the first polarization direction of the light emitted from the projector device through the rotation operation is provided so as to be rotatable with the straight traveling direction of the light emitted from the projector device as a rotation center axis. A first polarizing means for passing only light oscillating in any one of the second polarization directions orthogonal to the polarization direction; and provided in the plane direction of the vehicle window and oscillating in the first polarization direction. Second polarizing means that allows only light to pass through, and an image is placed on the opposite side of the vehicle window to the projector across the vehicle window. When projecting, the light from the projector device is transmitted through the vehicle window by rotating the first polarization unit so that the polarization direction of the first polarization unit coincides with the first polarization direction. Then, when the image is visible from the opposite side of the projector across the vehicle window and the image is displayed on the projector side of the vehicle window, the polarization direction of the first polarization means is the first polarization. By operating the first polarization means so that the second polarization direction is different from the direction, the light from the projector device is reflected to the vehicle window, and the image can be viewed from the projector side of the vehicle window. The gist is that it is.

  According to this configuration, only the light that vibrates in the predetermined polarization direction can be irradiated to the vehicle window side by transmitting the light from the projector device to the first polarizing means. The first polarizing means is provided to the projector device so as to be rotatable with respect to a rotation axis extending in a straight traveling direction of light emitted from the projector device. It is possible to change between the first polarization direction and the second polarization direction orthogonal to the first polarization direction. On the other hand, the second polarizing means provided in the vehicle window allows only light that vibrates in the first polarization direction to pass therethrough. An image is displayed on the inner side of the vehicle window or the outer side of the vehicle window by making the polarization direction of the first polarizing unit coincide with or different from the first polarization direction through the rotation of the first polarizing unit. can do. Specifically, by rotating the first polarization unit so that the polarization direction of the first polarization unit coincides with the first polarization direction, the light from the projector device passes through the vehicle window and passes through the vehicle window. A user who is on the opposite side of the projector across the vehicle window and who is on the opposite side of the projector across the vehicle window can view the image. Further, by rotating the first polarizing means so that the polarization direction of the first polarizing means is a second polarization direction different from the first polarization direction, the light from the projector device is reflected on the vehicle window. The user on the projector side can view the image. In this way, the surface on which an image is displayed can be switched in the vehicle window simply by rotating the first polarizing means.

  According to a fourth aspect of the present invention, in the in-vehicle display device according to any one of the first to third aspects, a light shielding portion extending in the vehicle front-rear direction that protrudes outward from the vehicle is provided on a surface of the vehicle window on the vehicle outer side. The gist of the invention is that a reflector is provided at regular intervals in the vehicle height direction, and a reflector for reflecting light from outside the vehicle is provided on the vehicle upper side of the light shielding portion.

  According to this configuration, sunlight and other light from the outside of the vehicle, particularly from above the vehicle are reflected by the reflecting material provided in the light shielding portion. Thereby, it is suppressed that a vehicle window becomes too bright and it becomes difficult to see the screen of a vehicle window, and visibility is ensured.

  According to a fifth aspect of the present invention, in the in-vehicle display device according to any one of the first to fourth aspects, the vehicle door is connected to the vehicle through communication for returning a response signal in response to a request signal transmitted from the vehicle side. An electronic key carried by a user that can be locked and unlocked and engine start, an external transmission device that transmits the request signal around the vehicle, and an in-vehicle transmission device that transmits the request signal inside the vehicle, The control device determines the position of the user carrying the electronic key based on whether the response signal is a response signal transmitted from the outside transmission device or the inside transmission device, and there is a vehicle window user. The gist is to display an image on the side.

  According to this configuration, the control device determines the position of the user carrying the electronic key based on whether the response signal is a response signal corresponding to the request signal transmitted from the in-vehicle transmission device or the in-vehicle transmission device. Then, the control device displays an image on the inside of the vehicle window when it is determined that the user is inside the vehicle, and displays an image on the outside of the vehicle window when it is determined that the user is outside the vehicle. Further, when there is no response signal from the electronic key in response to the request signal from the vehicle side, the user is not in the vicinity of the vehicle and does not display an image on the vehicle window. Therefore, an image is displayed at a necessary timing on the side that the user carrying the electronic key of the vehicle window can see. Thereby, it is suppressed that an image is displayed on a vehicle window wastefully, and it leads to reduction of power consumption.

  According to the present invention, visibility can be further improved in an in-vehicle display device.

The perspective view of the vehicle provided with the vehicle-mounted display apparatus touch-operated from the vehicle exterior in this embodiment. The block diagram of the vehicle-mounted display system in this embodiment. Schematic which showed the projection aspect to the vehicle window by the projector in this embodiment. The schematic diagram which showed the polarization aspect by the polarizing filter in this embodiment. The enlarged view of the range A of FIG. The top view which showed the vehicle exterior initial screen in this embodiment. The top view which showed the vehicle interior initial screen in this embodiment.

Hereinafter, an embodiment in which an in-vehicle display device according to the present invention is embodied in an in-vehicle display system will be described with reference to FIGS.
As shown in FIG. 1, vehicle doors 3 that are opened and closed when passengers get on and off are provided on both sides of the vehicle 2. A vehicle window 4 mainly made of a transparent glass material is fitted into the vehicle door 3 above each vehicle door 3. The occupant can view the scenery from the outside of the vehicle or from the inside of the vehicle through the vehicle window 4. The vehicle window 4 of the vehicle door 3 on the driver's seat side has a display unit for displaying various information and a function as an operation unit thereof. Hereinafter, unless otherwise specified, the vehicle window 4 indicates a vehicle window on the driver's seat side. That is, as shown in FIG. 1, when the vehicle door 3 is closed, various information is displayed on the vehicle window 4 so as to be visible from outside the vehicle. And a user can perform desired operation by touching according to the display item 60 displayed on the vehicle window 4, visually recognizing the display of the vehicle window 4 from the vehicle outer side. In addition, various information can be displayed on the vehicle window 4 so as to be visible from the inside of the vehicle. In this case, as in the outside of the vehicle, as shown in FIG. 3, the user in the driver's seat touches the vehicle window 4 while visually checking the display of the vehicle window 4.

Next, a block diagram showing the configuration of the in-vehicle display system will be described with reference to FIG.
As shown in FIG. 2, the in-vehicle display system 1 includes an electronic key 10 possessed by a driver of the vehicle 2 and an in-vehicle device 20 disposed in the vehicle 2. Mutual communication is automatically performed between the electronic key 10 and the in-vehicle device 20, and the door lock is unlocked and the engine is started on the condition that the mutual communication is established outside and inside the vehicle.

  The electronic key 10 has a wireless communication function, and controls in-vehicle devices through mutual communication with the in-vehicle device 20. The electronic key 10 includes an electronic key control unit 11 configured by a computer unit including a CPU, a ROM, a RAM, and the like, and an LF reception unit that is electrically connected to the electronic key control unit 11 and receives an LF band radio signal. 12 and a UHF transmitter 13 for transmitting a radio signal in the UHF band.

  When the LF receiver 12 receives a request signal that is an LF band radio signal transmitted from the in-vehicle device 20, the LF receiver 12 demodulates the request signal into a pulse signal and outputs the demodulated demodulated signal to the electronic key controller 11. To do. The electronic key control unit 11 is provided with a nonvolatile memory 11a made of, for example, an EEPROM or the like, and an ID code unique to the electronic key 10 is registered in the memory 11a. When the demodulated signal is input from the LF receiver 12, the electronic key controller 11 reads the received data and outputs a response signal including an ID code registered in the memory 11 a to the UHF transmitter 13. The UHF transmitter 13 transmits the response signal input from the electronic key controller 11 to the in-vehicle device 20 as a UHF band radio signal.

  The in-vehicle device 20 includes a computer unit including a CPU, a ROM, a RAM, and the like, and includes an in-vehicle control unit 21 that controls various in-vehicle devices, and an out-of-vehicle transmission unit that is electrically connected to the in-vehicle control unit 21. 22, an in-vehicle transmission unit 23, and an in-vehicle reception unit 24.

  When the request signal is input from the in-vehicle control unit 21, the vehicle exterior transmission unit 22 modulates the request signal into a radio signal having a predetermined frequency (LF band), and is transmitted via the vehicle exterior transmission antenna 22a at a preset intermittent period. To the predetermined area around the vehicle 2 (outside the vehicle). When a request signal is input from the in-vehicle control unit 21, the in-vehicle transmission unit 23 modulates the request signal into a radio signal having a predetermined frequency (LF band), and passes through the in-vehicle transmission antenna 23a with a preset intermittent period. To a predetermined area in the vehicle 2 (inside the vehicle). Here, the antenna output, arrangement, and the like are set so as not to overlap each other with the transmission areas outside the vehicle and inside the vehicle. The in-vehicle transmission unit 23 and the in-vehicle transmission antenna 23a constitute an in-vehicle transmission device, and the out-of-vehicle transmission unit 22 and the out-of-vehicle transmission antenna 22a constitute an out-of-vehicle transmission device.

When receiving the response signal transmitted from the electronic key 10 via the receiving antenna 24 a, the in-vehicle receiving unit 24 demodulates both signals into pulse signals and outputs them to the in-vehicle control unit 21.
The in-vehicle control unit 21 includes a non-volatile memory 21a made of, for example, an EEPROM or the like, and the memory 21a stores the same ID code as the ID code of the corresponding electronic key 10 and various information. The in-vehicle control unit 21 intermittently outputs request signals to the outside transmission unit 22 and the in-vehicle transmission unit 23 at different timings. When the response signal transmitted from the electronic key 10 in response to the request signal transmitted through the in-vehicle transmission unit 22 and the in-vehicle transmission unit 23 is received by the in-vehicle reception unit 24, the in-vehicle control unit 21 receives the response signal. The ID code included is compared with the ID code recorded in the memory 21a. At this time, the in-vehicle control unit 21 determines whether the response signal transmitted from the electronic key 10 is in response to the request signal transmitted from the in-vehicle transmission unit 22 or the in-vehicle transmission unit 23. It is determined whether the vehicle exists outside the vehicle or inside the vehicle. Based on the position of the electronic key 10, the in-vehicle control unit 21 can determine whether the user is in the vehicle or in the vehicle, and executes control to display an image on the side where the user is present in the vehicle window 4.

  In addition, a projector 31, a touch sensor 32, a car navigation device 33, a door lock device 34, various sensors 35, and an engine starting device 36 are electrically connected to the in-vehicle control unit 21.

  The car navigation device 33 uses a GPS (Global Positioning System), a vehicle speed pulse, a gyroscope, and the like to guide a travel route to the current position and the destination. The car navigation device 33 is provided with an in-vehicle display (not shown), and various information of the car navigation device 33 is displayed through the in-vehicle display at normal times. Various information displayed on the in-vehicle display can be displayed on the vehicle window 4 by the projector 31. In this case, various information from the car navigation device 33 is transmitted to the in-vehicle control unit 21. The in-vehicle control unit 21 can control the projector 31 to project an image including various information from the car navigation device 33 onto the vehicle window 4. The method of projecting the image onto the vehicle window 4 by the projector 31 will be described in detail later.

  The door lock device 34 is a device that automatically locks and unlocks the door lock. The in-vehicle control unit 21 outputs an unlock signal to the door lock device 34 when collation of the ID code of the response signal from the electronic key 10 according to the request signal transmitted from the outside transmission antenna 22a is established, that is, when outside vehicle collation is established. To do. Thereby, the door lock of the vehicle door 3 can be unlocked. Further, when the response signal from the electronic key 10 is not returned in response to the request signal transmitted from the outside transmission antenna 22a and the inside transmission antenna 23a, the in-vehicle control unit 21 determines that the user has left the vehicle 2 and the door lock device 34. Outputs a locking signal. Thereby, the door lock of the vehicle door 3 is locked. At this time, when the image is projected onto the vehicle window 4, the in-vehicle control unit 21 stops the power supply to the projector 31, thereby erasing the image displayed on the vehicle window 4.

  The various sensors 35 are a plurality of types of sensors that detect the remaining amount of gasoline, tire air pressure, engine oil contamination, and the like. Detection results of the various sensors 35 are output to the in-vehicle control unit 21.

  The engine starting device 36 is a device that permits the starting of the vehicle engine. The in-vehicle control unit 21 outputs a start permission signal to the engine starting device 36 when the ID code verification of the response signal from the electronic key 10 corresponding to the request signal transmitted from the in-vehicle transmitting antenna 23a is established, that is, in-vehicle verification is established. To do. As a result, the vehicle engine is allowed to start.

Next, a specific configuration of the projector 31 will be described with reference to FIG.
As shown in FIG. 3, the projector 31 is installed on the top surface of the vehicle 2. The projector 31 is provided with a light source unit 40 that emits light projected on the vehicle window 4. A polarizing filter 42 is provided on the light irradiation side of the light source unit 40. The polarization filter 42 is rotatably provided by a polarization motor 43 built in the projector 31. The rotation angle of the polarization filter 42 by the polarization motor 43 is set at 90 ° intervals. The polarizing filter 42 has a property of passing only light that vibrates in a specific direction (polarization direction). That is, as shown in FIG. 4, the light from the light source unit 40 has a periodic waveform that vibrates in various directions. By passing the light through the polarizing filter 42, only the light that vibrates in the polarization direction can be passed through and extracted.

  As described above, the polarization filter 42 can be rotated at intervals of 90 ° by the polarization motor 43, but the polarization direction is rotated at intervals of 90 °. That is, the polarization direction of the light emitted from the projector 31 to the vehicle window 4 includes a total of two directions: a first polarization direction along the vehicle vertical direction and a second polarization direction orthogonal to the first polarization direction. . The polarizing filter 42 corresponds to the first polarizing means. There are various types of projectors 31 such as a liquid crystal projector and a DLT (digital light processing) projector, but any type may be used as long as an image can be projected onto the vehicle window 4.

Next, a specific configuration of the vehicle window 4 will be described with reference to FIG.
As shown in FIG. 5, the vehicle window 4 is formed by sandwiching a transparent polarizing plate 46 in a glass shield 45 formed of a transparent glass material. Similar to the polarizing filter 42, the polarizing plate 46 has a property of passing only light that vibrates in a specific direction (polarization direction). In the present embodiment, the polarization direction of the polarizing plate 46 is a direction along the vehicle vertical direction. Incidentally, the presence of the glass shield 45 does not change the polarization direction of light.

  When light in the first polarization direction is irradiated from the projector 31 to the polarizing plate 46, the light passes through the polarizing plate 46 as indicated by an arrow from the projector 31 on the upper side in FIG. As a result, the light from the projector 31 reaches the user outside the vehicle, and an image is displayed outside the vehicle window 4. On the other hand, when light in the second polarization direction is irradiated from the projector 31 to the polarizing plate 46, the light is reflected by the polarizing plate 46 as shown by an arrow from the lower projector 31 in FIG. As a result, an image is displayed on the inner side of the vehicle window 4. In this way, by switching the polarization direction on the projector 31 side between the first polarization direction and the second polarization direction through driving of the polarization motor 43, the surface on which the image is displayed is set to the vehicle interior or vehicle exterior of the vehicle window 4. You can switch to In FIG. 5, two projectors 31 are shown for convenience of explanation, but both projectors 31 are the same projector 31 in which the polarizing filter 42 is rotated by 90 °.

  Here, in the case where the vehicle window 4 is displayed on the vehicle interior side and the case where the vehicle window 4 is displayed on the vehicle exterior side, the vehicle-mounted control unit 21 is reversed from the projector 31 even when the same screen is displayed. It is necessary to irradiate the light of the state. This is because when the vehicle window 4 is displayed on the vehicle interior side, the light from the projector 31 is reflected by the vehicle window and reaches the user, and when the vehicle window 4 is displayed on the vehicle exterior side, the light from the projector 31 is reflected on the vehicle window. This is because the user directly reaches the user through 4. The polarizing plate 46 corresponds to a second polarizing unit.

  As shown in FIG. 5, on the vehicle exterior side of the vehicle window 4, extending in the vehicle front-rear direction (paper surface direction in FIG. 5), triangular prism-shaped light shielding portions 47 are formed at regular intervals in the vehicle vertical direction. The light shielding portion 47 is formed with an inclined surface 48 that inclines in the vehicle downward direction toward the vehicle outer side. The inclined surface 48 is ideally formed to be perpendicular to the sunlight irradiation direction. A reflective material 49 is attached to the inclined surface 48. The reflecting material 49 reflects sunlight falling on the outside of the vehicle. Thereby, it is possible to prevent the image projected by the projector 31 from becoming difficult to be seen by irradiating the vehicle window 4 with sunlight having a higher luminance than the light from the projector 31.

  In addition, the irradiation direction of sunlight changes with seasons and places. Therefore, by forming the inclined surface 48 perpendicular to the direction in which the sun irradiates with the highest frequency in each place, and practically in each country, the influence of sunlight on the image projected by the projector 31 can be efficiently suppressed. . When the light-shielding portion 47 is arranged at regular intervals in the vehicle vertical direction, visibility from the inside of the vehicle to the outside of the vehicle or from the outside of the vehicle to the inside of the vehicle is secured.

  As shown in FIG. 5, the touch sensor 32 has a capacitance between a touch electrode 50 sandwiched between the polarizing plate 46 and the glass shield 45 and a human body (finger) close to the touch electrode 50 and the glass shield 45. And a detection circuit 51 for detecting. As shown in FIG. 5, the touch electrode 50 is formed in a sheet shape and is attached to the side surface of the polarizing plate 46 on the vehicle outer side. The detection circuit 51 is provided on the substrate and is electrically connected to the touch electrode 50 and is built in, for example, the vehicle door 3. The touch electrode 50 is a transparent electrode using, for example, ITO (Indium Tin Oxide). When a finger is brought close to the touch electrode 50, a current flows through the human body, and the capacitance between the touch electrode 50 and the human body changes. The detection circuit 51 detects this change in capacitance, and outputs the detection result to the in-vehicle control unit 21. The in-vehicle control unit 21 can determine the presence / absence of a touch operation on the vehicle window 4 and the touch position based on the detection result of the detection circuit 51. The touch sensor 32 can detect a touch operation on the vehicle window 4 from the inside and outside of the vehicle window 4.

Next, the operation mode of the in-vehicle display system 1 and the control mode during operation will be described.
When the electronic key 10 carried by the user receives a request signal transmitted from the outside transmitting antenna 22a around the vehicle 2, the electronic key 10 transmits a response signal including the ID code of the electronic key 10 to the vehicle side. The in-vehicle controller 21 unlocks the vehicle door 3 via the door lock device 34 when collation (external vehicle collation) of the ID code of the received response signal is established. At the same time, the in-vehicle control unit 21 supplies power to the projector 31 and displays the initial outside screen on the outside of the vehicle window 4. Precisely, the vehicle-mounted control unit 21 drives and controls the polarization filter 42 through the polarization motor 43 of the projector 31, and irradiates the vehicle window 4 side with light having the first polarization direction through the polarization filter 42. Furthermore, the vehicle-mounted control unit 21 controls the light emission (light source unit 40) of the projector 31 so that the vehicle exterior initial screen is displayed on the vehicle exterior surface of the vehicle window 4. Thereby, as illustrated in FIG. 6, the vehicle outside initial screen is displayed on the vehicle outside of the vehicle window 4.

  A car navigation system 60a, a TV (television) 60b, various kinds of information 60c, and a vehicle situation 60d are displayed on the screen (vehicle window 4) as display items 60 on the screen (vehicle window 4). As described above, the in-vehicle control unit 21 can determine the touch position on the screen based on the detection result of the touch sensor 32. The in-vehicle control unit 21 compares the touch position with an image displayed on the vehicle window 4 via the projector 31 and determines that the display item is selected if the touch position is within the range of the display item. That is, the user can select the display item 60 by touching the display item 60 from the outside of the vehicle.

  When the in-vehicle control unit 21 recognizes that the car navigation 60a is touch-operated, map information and the like are further displayed, and a destination can be set through further touch operations. When the in-vehicle control unit 21 recognizes that the TV 60b is touch-operated, it displays the received one segment broadcasting or the like.

  When the in-vehicle control unit 21 recognizes that the various information 60c is touch-operated, based on the various information stored in the memory 21a, the gasoline tank capacity, the vehicle year, the tire chain attachment method, the tire replacement method, the vehicle replacement Simple inspection method, correct car washing method, etc. can be displayed. Thereby, for example, even when the vehicle maintenance method is forgotten, these pieces of information can be displayed immediately. In particular, the vehicle maintenance method is displayed outside the vehicle window 4 so that maintenance can be performed outside the vehicle while referring to the vehicle maintenance method, which is highly convenient.

  When the vehicle-mounted control unit 21 recognizes that the vehicle situation 60d is touch-operated, the remaining amount of gasoline, tire air pressure, and engine oil replacement time can be displayed based on the detection results of the various sensors 35. Thereby, the user can confirm a vehicle condition easily. By displaying the remaining amount of gasoline, especially when refueling at a self-service gas station, you can check the remaining amount of gasoline while adding gasoline. It becomes easy.

  When the user opens the vehicle door 3, assuming that no image display is necessary, the in-vehicle control unit 21 stops power supply to the projector 31 and erases the image displayed on the vehicle window 4. Thereby, the power consumption concerning an image display can be reduced.

  Next, when the user carrying the electronic key 10 gets into the vehicle 2, the electronic key 10 includes the ID code of the electronic key 10 on the vehicle 2 side in response to a request signal transmitted from the in-vehicle transmission antenna 23a. Send a response signal. The in-vehicle control unit 21 sets the vehicle engine to the start-permitted state via the engine starter 36 when the ID code verification (in-vehicle verification) of the received response signal is established. At the same time, the vehicle-mounted control unit 21 displays an in-vehicle initial screen on the vehicle inner side of the vehicle window 4 on condition that the vehicle door 3 is closed. Specifically, the vehicle-mounted control unit 21 drives and controls the polarization filter 42 through the polarization motor 43 of the projector 31, and irradiates the vehicle window 4 side with light having the second polarization direction through the polarization filter 42. That is, when an image is displayed on the outside of the vehicle window 4, the polarizing filter 42 is rotated by 90 °. Further, the in-vehicle control unit 21 controls the light emission (light source unit 40) of the projector 31 so that the in-vehicle initial screen is displayed on the inner side of the vehicle window 4.

  Thereby, as illustrated in FIG. 7, an in-vehicle initial screen is displayed on the inner side of the vehicle window 4. In the vehicle initial screen, an appreciation presentation 60e is added as a new display item to the display item 60 of the vehicle external initial screen. The appreciation presentation 60e is touch-operated, for example, when it is desired to express gratitude to another vehicle (exactly the driver) traveling in the oncoming lane. When the vehicle-mounted control unit 21 recognizes that the gratitude presentation 60e has been touched, the polarization filter 42 is rotated by 90 ° via the polarization motor 43 of the projector 31, and the vehicle window 4 is displayed on the vehicle interior side. Switch to the outside display. At the same time, the in-vehicle control unit 21 controls the projector 31 so that an appreciation presentation screen is displayed. An appreciation presentation screen (not shown) displays, for example, “thank you” or a symbol that conveys gratitude. In addition, by flashing the display indicating gratitude and changing the color, it is possible to appeal more strongly to other vehicles. In this way, the appreciation can be displayed on the outside of the vehicle window 4 in comparison with the display of appreciation such as raising a hand from the driver's seat, bowing, etc., which has been conventionally performed. And thank you to other vehicles. Even at night, the outside of the vehicle window 4 shines, so that thanks can be transmitted to other vehicles without any problem.

  As described above, the vehicle-mounted control unit 21 displays the vehicle exterior initial screen on the vehicle window 4 for the first time when communication with the electronic key 10 existing outside the vehicle is established. Accordingly, since the screen is displayed on the vehicle window 4 only when the user is in the vicinity of the vehicle, it is possible to suppress unnecessary display of the screen on the vehicle window 4 and to reduce power consumption. In addition, an image is displayed on the vehicle exterior side of the vehicle window 4 when the vehicle outside verification is established, and an image is displayed on the vehicle interior side of the vehicle window 4 when the vehicle interior verification is established. For this reason, an image is displayed on the side that the user of the vehicle window 4 can visually recognize without any operation, and the convenience is high.

  In addition, it is possible to surround the vehicle window 4 outside the vehicle and view images simultaneously by a plurality of people. Furthermore, since the image is displayed on the vehicle window 4 even in the vehicle, the image is displayed on a larger screen compared to the case where the image is displayed on the vehicle display, so that the visibility from the rear seat can be improved.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) The in-vehicle control unit 21 can display an image on the inside or outside of the vehicle window 4 via the projector 31. Thereby, even if it is multiple persons, the image displayed on the vehicle window 4 can be seen in the inside or outside of a vehicle, ensuring high visibility.

  (2) The user can switch to a desired screen or the like by touching a screen displayed on the inside or the outside of the vehicle window 4. Thus, the convenience can be improved by enabling the touch operation of the screen displayed on the vehicle window 4.

  (3) By transmitting the light from the projector 31 to the polarizing filter 42, only the light that vibrates in a predetermined polarization direction can be irradiated to the vehicle window 4 side. The polarizing filter 42 is provided so as to be rotatable with respect to the projector 31 about the straight traveling direction of light emitted from the projector 31 as a rotation center axis. The polarizing direction of the polarizing filter 42 is the same as the first polarizing direction. It is possible to change between a second polarization direction orthogonal to one polarization direction. On the other hand, the polarizing plate 46 provided in the vehicle window 4 allows only light that vibrates in the first polarization direction (vertical direction in FIG. 5) to pass therethrough. Displaying an image on the vehicle window 4 inside or outside the vehicle window 4 by making the polarization direction of the polarization filter 42 coincide with or different from the first polarization direction through the rotation of the polarization filter 42. Can do. Specifically, the light from the projector 31 is transmitted through the vehicle window 4 by rotating the polarization filter 42 so that the polarization direction of the polarization filter 42 coincides with the first polarization direction that is the polarization direction of the polarizing plate 46. Then, the user reaches the outside of the vehicle, and the user outside the vehicle can view the image. Further, by rotating the polarization filter 42 so that the polarization direction of the polarization filter 42 is different from the second polarization direction, the light from the projector 31 is reflected on the vehicle window 4, and the user inside the vehicle visually recognizes the image. It becomes possible. In this manner, the surface on which an image is displayed can be switched in the vehicle window 4 simply by rotating the polarizing filter 42.

  (4) Light from the outside of the vehicle including sunlight, particularly from above the vehicle is reflected by the reflecting material 49 provided in the light shielding portion 47. Thereby, it is suppressed that the vehicle window 4 becomes too bright, and it becomes difficult to see the screen of the vehicle window 4, and visibility is ensured.

  (5) The in-vehicle control unit 21 determines the position of the user carrying the electronic key 10 based on whether the response signal is in response to the request signal transmitted from either the outside transmission antenna 22a or the inside transmission antenna 23a. When the on-board control unit 21 determines that the user is inside the vehicle, the vehicle-mounted control unit 21 displays an image on the vehicle interior side of the vehicle window 4, and when the user determines that the user is outside the vehicle, displays an image on the vehicle exterior side of the vehicle window 4. . Further, when there is no response signal from the electronic key 10 in response to a request signal from the vehicle side, the user is not in the vicinity of the vehicle and does not display an image on the vehicle window 4. Therefore, an image can be displayed at a necessary timing on the vehicle window 4 on the side that can be visually recognized by the user carrying the electronic key. Thereby, it is suppressed that an image is displayed on the vehicle window 4 wastefully, and it leads to reduction of power consumption.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
In the above embodiment, the touch sensor 32 is provided in order to enable a touch operation on the screen displayed on the vehicle window 4. However, even if the touch sensor 32 is omitted, the vehicle window 4 functions as a display unit, and the screen displayed on the vehicle window 4 can be viewed inside and outside the vehicle. In this configuration, the operation of the screen displayed on the vehicle window 4 is performed, for example, through a switch provided near the driver's seat.

  In the above embodiment, the in-vehicle controller 21 rotates the polarizing filter 42 every 90 ° via the polarization motor 43 of the projector 31 to switch between the vehicle inside display and the vehicle outside display. However, the rotation angle interval of the polarizing filter 42 is not limited to 90 °. That is, it is also possible to display images on the vehicle windows 4 on both the inside and the inside of the vehicle with the rotation angle interval of the polarizing filter 42 being 45 °. Specifically, the polarization filter 42 is rotated so that light in a polarization direction that forms 45 ° with respect to the first polarization direction and the second polarization direction is irradiated to the vehicle window 4 side. At this time, the polarization direction of the irradiated light includes both the first polarization direction and the second polarization direction. Thereby, an image can be displayed on the vehicle windows 4 on both sides. At this time, the images shown on the vehicle side and the vehicle interior are reversed, but for example, the display item 60 may be a symmetrical symbol.

  Further, by preventing the light emitted from the light source unit 40 of the projector 31 from being transmitted through the polarization filter 42, the vehicle window 4 is irradiated with light including both the first polarization direction and the second polarization direction as described above. Images are displayed on both sides of 4. In this configuration, when it is desired to display an image only in the vehicle window 4 either inside or outside the vehicle, the light emitted from the light source unit 40 of the projector 31 is transmitted through the polarization motor 43 to the polarization filter 42, and the light is emitted. Is limited to the first polarization direction or the second polarization direction. Thus, by projecting images on both sides of the vehicle window 4, a plurality of people inside and outside the vehicle can share the same screen and perform a touch operation.

  In the above embodiment, the projector 31 is provided as a display device that can display an image on the vehicle window 4. However, the present invention is not limited to this as long as an image can be displayed on the vehicle window 4. For example, an LED liquid crystal composed of a plurality of light emitting diodes (LEDs) may be used for the vehicle window 4.

  In the above embodiment, the touch electrode 50 is sandwiched between the polarizing plate 46 and the glass shield 45. However, for example, a polarizing plate 46 may be provided on the inner surface of the glass shield 45, and a transparent film may be attached to the inner side of the glass shield 45. In this case, since there is no need for insert molding in which the polarizing plate 46 is sandwiched between the glass shields 45, a simple configuration can be achieved. Further, by using a transparent film as compared with the glass shield 45, it is possible to improve the sensitivity of the touch operation from the inside of the vehicle.

In the above embodiment, various information, vehicle status, and the like can be displayed on the vehicle window 4, but the display content is not limited to this, and may be vehicle speed information, travel distance, and the like.
In the above-described embodiment, the capacitive touch sensor 32 that detects a touch operation based on a change in capacitance is provided. However, the touch sensor 32 is not limited to the capacitive type as long as it can detect a touch operation, and for example, another detection method such as an infrared touch sensor may be adopted.

  In the above embodiment, the polarization filter 42 is rotated by the driving force of the polarization motor 43. However, other rotary actuators such as a rotary solenoid may be employed. Further, the polarization motor 43 may be omitted if the polarization filter 42 can be rotated. In this case, for example, the polarizing filter 42 is manually rotated to switch the display on the inside and outside of the vehicle.

  Further, the polarizing filter 42 may be unrotatable. In this case, the polarization filter 42 is fixed to the projector 31. Then, an image is displayed only on either the outside of the vehicle window 4 or the inside of the vehicle window 4. Even in this case, since the vehicle window 4 can be used as the display unit and the operation unit, the visibility and operability are high for the user.

  In the above embodiment, the projector 31 is installed on the ceiling surface of the vehicle 2. However, the installation position of the projector 31 is not limited to the ceiling surface as long as an image can be projected onto the vehicle window 4. That is, for example, the projector 31 may be installed on the dashboard of the vehicle 2 and the light from the projector 31 may be projected onto the vehicle window 4.

  Further, the projector 31 may be provided outside the vehicle, for example, above the side mirror. In this case, when projecting an image on the vehicle exterior side of the vehicle window 4, the projector 31 emits light in the second polarization direction and reflects it to the vehicle window 4. When projecting an image on the vehicle interior side of the vehicle window 4, the projector 31. Then, the light of the first polarization direction is irradiated to transmit the light to the vehicle window 4. When the projector 31 is installed outside the vehicle, it is difficult for an obstacle to display an image such as a person or an object between the projector 31 and the vehicle window 4. When the projector 31 is installed on the side mirror, for example, even when the vehicle door 3 is opened, the image is displayed unchanged.

  In the above embodiment, the image is displayed on the vehicle window 4 on the driver's seat side, but the vehicle window 4 that displays the image is not limited to the driver's seat side. That is, an image may be displayed on the vehicle window 4 of the vehicle door 3 on the passenger seat side and the rear seat side, and further on the vehicle window 4 of the back door. In this case, a plurality of projectors 31 may be provided so that an image can be projected onto each vehicle window 4 simultaneously, or the single projector 31 can be rotated about an axis extending in the vehicle height direction. It is also possible to move the projector 31 so that the light of the projector 31 irradiates the vehicle window 4 where it is desired to display an image. When an image is projected outside the vehicle window of the back door, a signal such as an appreciation screen can be sent to the following vehicle. Thereby, for example, when the vehicle is interrupted in front of another vehicle, it is possible to display a gratitude on the outside of the vehicle window of the back door through a touch operation on the vehicle window 4 on the driver's seat side.

  In the above embodiment, the in-vehicle control unit 21 is based on whether the response signal transmitted from the electronic key 10 is a response to the request signal transmitted from the outside transmission antenna 22a or the inside transmission antenna 23a. Thus, it is determined whether the user carrying the electronic key 10 is present outside the vehicle or inside the vehicle, and thus whether the image is displayed on the inside or the inside of the vehicle window 4. However, the method for determining the location of the user carrying the electronic key 10 is not limited to this. For example, each vehicle door is provided with a transmission unit and a transmission antenna, and the vehicle-mounted control unit 21 is a user who carries the electronic key 10 based on which response signal is transmitted from which transmission antenna. Is located near which vehicle door. In this case, for example, in the configuration in which an image can be displayed on the vehicle window 4 of the vehicle door 3 on either the passenger seat side or the rear seat side, the image is displayed on the vehicle window 4 that is closest to the user, that is, most easily visible. Can be displayed.

  Also in the following configuration, an image can be displayed on an appropriate vehicle window through determination of the user's position. That is, a plurality of sets of the in-vehicle receiving unit 24 and the receiving antenna 24a are provided, and the in-vehicle control unit 21 determines the position of the user based on which receiving antenna 24a has received the response signal. Here, when response signals are received via a plurality of receiving antennas 24a, it is determined that there is a user near the antenna 24a having the strongest received signal strength.

  Further, in the above embodiment, a so-called key operation free system that allows the vehicle door 3 to be locked and unlocked without the user's operation by bidirectional communication between the vehicle 2 and the electronic key 10 is mounted on the vehicle. It was. However, a so-called wireless key system in which various request signals such as locking and unlocking are transmitted to the vehicle 2 through a switch operation of the electronic key 10 may be mounted on the vehicle 2. Even in this case, the user's position can be determined based on the received signal strength by providing a plurality of sets of the in-vehicle receiving unit 24 and the receiving antenna 24a as described above.

  In the above embodiment, the polarizing direction of the polarizing plate 46 is a direction along the vehicle vertical direction, but the polarizing direction of the polarizing plate 46 is not limited to this. For example, when the polarization direction of the polarizing plate 46 is a direction orthogonal to the vertical direction of the vehicle (the horizontal direction in FIG. 5), the vehicle window 4 (polarizing plate 46) has the first polarization direction (the vertical direction in FIG. 5). ) Is reflected, and light in the second polarization direction (left-right direction in FIG. 5) is transmitted.

Next, the technical idea that can be grasped from the embodiment will be described together with the effects.
(A) In the in-vehicle display device according to claim 5, the outside transmission device or the inside transmission device is provided at a position corresponding to each vehicle door, and the control device is any of the outside transmission device or the inside transmission. On-vehicle display that determines the position of a user carrying the electronic key based on whether the response signal is a response signal according to a request signal transmitted from the apparatus, and displays an image on the vehicle window of the vehicle door that is closest to the position where the user is present Display device.

According to this configuration, an image is displayed on the vehicle window of the vehicle door closest to the position where the user exists. For this reason, it is easy for the user to visually recognize the image of the vehicle window.
(B) The on-vehicle display device according to any one of claims 3 to 5, further comprising: a rotary actuator that rotates the first polarizing means, and the first polarization through rotation by a driving force of the rotary actuator. A vehicle-mounted display device in which the polarization direction of the means can be changed between the first polarization direction and the second polarization direction.

  According to this configuration, an image can be displayed on the inner side of the vehicle window by driving the rotary actuator, or an image can be displayed on the outer side of the vehicle window. This makes it possible to more easily switch the surface of the vehicle window that displays an image between the inside of the vehicle and the outside of the vehicle.

  DESCRIPTION OF SYMBOLS 2 ... Vehicle, 3 ... Vehicle door, 4 ... Vehicle window, 10 ... Electronic key, 21 ... Car-mounted control part (control apparatus), 31 ... Projector (projector apparatus, display apparatus), 32 ... Touch sensor, 43 ... Polarization motor ( Rotation actuator), 47: light shielding unit, 49: reflective material, 50: touch electrode, 51: detection circuit.

Claims (5)

A display device for displaying an image on at least one side of the vehicle inner surface or the vehicle outer surface of the vehicle window of the vehicle door;
A control device for controlling a screen displayed by the display device;
A vehicle-mounted display device comprising: The in-vehicle display device according to claim 1,
A touch sensor for detecting a touch operation on the vehicle window;
The said control apparatus is a vehicle-mounted display apparatus which controls the screen which the said display apparatus displays based on the detection result of the said touch sensor. The in-vehicle display device according to claim 1 or 2,
The display device is a projector device that projects an image on the vehicle window by irradiating the vehicle window with light,
The projector device is provided so as to be rotatable about a straight direction of light emitted from the projector device as a rotation center axis, and the first polarization direction or the same through the rotation operation of the light emitted from the projector device. First polarizing means for passing only light oscillating in any direction of the second polarization direction orthogonal to the first polarization direction;
A second polarizing means provided over the surface direction of the vehicle window and allowing only light that vibrates in the first polarization direction to pass therethrough,
When projecting an image on the opposite side of the vehicle window from the projector across the vehicle window, the first polarization unit is rotated so that the polarization direction of the first polarization unit coincides with the first polarization direction. By moving the light, the light from the projector device passes through the vehicle window, and the image is visible from the opposite side of the projector across the vehicle window.
When projecting an image on the projector side of the vehicle window, the first polarization unit is operated so that the polarization direction of the first polarization unit is a second polarization direction different from the first polarization direction. Thus, the vehicle-mounted display device that reflects light from the projector device to the vehicle window so that an image can be viewed from the projector side of the vehicle window. In the vehicle-mounted display apparatus as described in any one of Claims 1-3,
On the vehicle outer surface of the vehicle window, a light-shielding portion that protrudes outward in the vehicle and extends in the vehicle front-rear direction is provided at regular intervals in the vehicle height direction.
A vehicle-mounted display device in which a reflective material that reflects light from outside the vehicle is provided on the vehicle upper side of the light shielding portion. In the in-vehicle display device according to any one of claims 1 to 4,
An electronic key that is carried by the user that enables locking and unlocking of the vehicle door and engine start through communication for returning a response signal in response to a request signal transmitted from the vehicle side to the vehicle,
An out-of-vehicle transmitter for transmitting the request signal around the vehicle;
An in-vehicle transmission device for transmitting the request signal into the vehicle,
The control device determines the position of the user carrying the electronic key based on whether the response signal is a response signal transmitted from the outside transmission device or the inside transmission device, and there is a vehicle window user. In-vehicle display device that displays images on the side.

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