US20080150709A1 - Onboard Display Device, Onboard Display System and Vehicle - Google Patents

Onboard Display Device, Onboard Display System and Vehicle Download PDF

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Publication number
US20080150709A1
US20080150709A1 US10598098 US59809805A US2008150709A1 US 20080150709 A1 US20080150709 A1 US 20080150709A1 US 10598098 US10598098 US 10598098 US 59809805 A US59809805 A US 59809805A US 2008150709 A1 US2008150709 A1 US 2008150709A1
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Patent type
Prior art keywords
display
image
vehicle
area
display section
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10598098
Inventor
Takeshi Yamamoto
Aki Miake
Toshiya Takahashi
Megumi Itoh
Mitsukazu Okuda
Takeshi Doi
Takeo Abe
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Sharp Corp
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Sharp Corp
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00Navigation; Navigational instruments not provided for in preceding groups
    • G01C21/26Navigation; Navigational instruments not provided for in preceding groups specially adapted for navigation in a road network
    • G01C21/34Route searching; Route guidance
    • G01C21/36Input/output arrangements of navigation systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00Arrangement of adaptations of instruments
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/18Closed circuit television systems, i.e. systems in which the signal is not broadcast
    • H04N7/181Closed circuit television systems, i.e. systems in which the signal is not broadcast for receiving images from a plurality of remote sources
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2350/00Arrangements or adaptations of instruments; Dashboards
    • B60K2350/20Optical features of instruments
    • B60K2350/2013Optical features of instruments using a camera

Abstract

An onboard display device in accordance with the present invention includes a display section (11) attached to an instrument panel of a vehicle. The section (11) has a second display area (11 b) and a first display area (11 a). The second display area (11 b) shows at least the speed as vehicle condition images indicating the conditions of the vehicle. The first display area (11 a) shows a navigation image and other secondary images. The display section (11) measures greater in width than in height with an aspect ratio of 7:3 or greater. The aspect ratio is the width/height ratio of a display area. The onboard display device allows for a visibility-improved simultaneous display of the secondary image, such as a navigation image, and the vehicle condition image, such as a speed display, which presents information on the conditions of the vehicle.

Description

    TECHNICAL FIELD
  • The present invention relates to onboard display devices and systems for displaying the traveling speed, engine speed, and other conditions of the vehicle. The present invention also relates to vehicles in which the onboard display system is installed.
  • BACKGROUND ART
  • New automobile instrument panels, or onboard display devices, have been suggested. They display driver-supporting information, such as navigation images (“secondary images”), as well as the traveling speed, engine speed, and other information on the conditions of the vehicle. See Japanese published patent application 6-195056/1994 (Tokukaihei 6-195056; published on Jul. 15, 1994) and Japanese published patent application 9-123848/1997 (Tokukaihei 9-123848; published on May 13, 1997).
  • For example, Tokukaihei 6-195056 provides a wide display screen to improve on visibility, road safety, and ease in operation. Monitor images around the vehicle are displayed on the wide screen along with traveling speed, fuel, and other vehicle-related information.
  • Tokukaihei 9-123848 provides a wide display device through which the driver is presented with necessary information depending on traveling conditions, to allow for comfortable and smooth driving.
  • Tokukaihei 6-195056 discloses a display device with a screen measuring 160 to 180 mm in width and 80 to 100 mm in height. The patent application also discloses a specific aspect ratio of 16:9 for display screen. The aspect ratio is the width/height ratio of a display area.
  • However, navigation images are typically displayed at an aspect ratio of 4:3, 15:9, or 16:9. For example, if a 12:9 navigation image, with the least width, is produced on a Tokukaihei 6-195056 display screen (16:9), the remaining part of the screen has a 4:9 aspect ratio. This means that other images will appear vertically elongated.
  • A speed display device mounted on an instrument panel for a vehicle is expected also to produce other displays including navigation and rearview images.
  • If a navigation image is produced on the display device disclosed in Tokukaihei 6-195056 at 4:3 (12:9), the remaining 4:9 part of the screen is not large enough to accommodate a round speedometer display.
  • The speedometer and related displays are more important than, for example, the navigation system in terms of safety. However, when they are displayed side by side on the Tokukaihei 6-195056 display device, the former appear much smaller and more difficult to recognize. This situation will lead to safety and ease-in-operation issues.
  • As to the Tokukaihei 9-123848 display device, sufficient resolution is available if navigation and other secondary images and vehicle condition images presenting the conditions of the vehicle are switchably displayed. If these images are however displayed at the same time, sufficient resolution is not ensured for each kind of image. The resultant display is hard to recognize for the driver. This will again lead to safety and ease-in-operation issues.
  • DISCLOSURE OF INVENTION
  • The present invention, conceived in view of the problems, has an objective to provide an onboard display device and systems, as well as a vehicle incorporating the device and system. The device and system achieves improved visibility to the eye of the driver in the concurrent display of a secondary image and a vehicle condition image. The former includes, for example, a navigation image. The latter presents information on the conditions of the vehicle and includes. for example, a speed display. The device and system thus achieves improved road safety and ease in operation.
  • An onboard display device in accordance with the present invention, to achieve the objective, is characterized by the inclusion of a display section attached to an instrument panel of a vehicle. The display section shows at least the speed as vehicle condition images indicating the conditions of the vehicle. The display section also shows a navigation image and other secondary images. The display section measures greater in width than in height with an aspect ratio of 7:3 or greater.
  • Generally, at a 4:3 aspect ratio, a navigation image and other secondary images are displayed with sufficient visibility. At a 3:3 aspect ratio, a common, round speedometer can still be displayed with sufficiently visibility.
  • Therefore, if a navigation image and other secondary images are shown at the 4:3 aspect ratio, the foregoing arrangement where the display area on the display section measures greater in width than in height with the 7:3 or greater width/height ratio (aspect ratio) can still accommodate a display area having the 3:3 aspect ratio for the vehicle condition images.
  • This allows for a visibility-improved simultaneous display of the secondary image, such as a navigation image, and the vehicle condition image, such as a speed display, which presents information on the conditions of the vehicle. As a result, the onboard display device offers improvement in visibility, safety, and easy-of-use to the driver.
  • Secondary images, other than the navigation image, include for example a television image, a camera image, an email message transmission/reception image, and other images which are useful information to the driver or a fellow passenger.
  • The aspect ratio only needs be 7:3 or greater. For example, at 8:3 or 32:9, two 4:3 or 16:9 display areas can be accommodated. As a result, high visibility displays are produced in both areas, giving extra safety to the driver.
  • An onboard display system in accordance with the present invention is characterized by the inclusion of an onboard display device, imaging devices, and a control device. The onboard display device is arranged in accordance with the present invention. The imaging devices take images to and near the front, rear, right, and left of the vehicle. The control device controls imaging operations of the imaging devices so that a front image, a rear image, a right-hand image, and a left-hand image taken by the imaging devices can be all simultaneously shown on the display section of the onboard display device,
  • According to the arrangement, the imaging devices takes images to and near the front, rear, right, and left of the vehicle. The images are simultaneously shown on the display section of the vehicle display device. The driver can reliably check the surroundings of the vehicle for safety when start moving the vehicle.
  • A vehicle in accordance with the present invention is characterized by the inclusion of an onboard display device, imaging devices, a reverse gear, and a display control device. The onboard display device is arranged in accordance with the present invention. The imaging devices take images to and near the rear of the vehicle. The reverse gear is selected to back the vehicle. Under the control of the display control device,
  • the onboard display device, upon a selection of the reverse gear, shows a widthwise elongated image to and near the rear of the vehicle as taken by the imaging devices at an aspect ratio more than or equal to 2.3:1.
  • It is not sufficient to display only the space where the vehicle will be parked. The aspect ratio is determined in order that at least about halves of adjacent parking spaces are visible, provided that the body of the vehicle is 170 cm wide (e.g., Japanese compact cars), the parking space is 230 cm wide, and the vehicle is 200 cm high.
  • Showing a widthwise elongated image to and near the rear of the vehicle in association with the reverse gear at an aspect ratio of 2.3:1 or greater as in the foregoing arrangement provides an easy-to-see image. Thus, the display device is capable of highly visible displays when parking the vehicle, allowing the driver to safely drive backwards.
  • Additional objects, advantages and novel features of the invention will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following or may be learned by practice of the invention.
  • BRIEF DESCRIPTION OF DRAWINGS
  • FIG. 1, illustrating an embodiment of the present invention, is a plan view of a display section for an onboard display device.
  • FIG. 2 is a schematic block diagram of the onboard display system incorporating the display section.
  • FIG. 3 is a drawing showing an example of resolution for the display section.
  • FIG. 4 is a drawing showing another example of resolution for the display section.
  • FIG. 5 is a drawing showing yet another example of resolution for the display section.
  • FIG. 6 is a drawing showing an example of display produced on the display section with the resolution shown in FIG. 5.
  • FIG. 7 is a plan view illustrating the setup of omnidirectional cameras mounted to an automobile to achieve the display example shown in FIG. 6.
  • FIG. 8 is a flow chart illustrating an example of a display process flow for an image captured by the omnidirectional cameras shown in FIG. 7.
  • FIG. 9 is a flow chart illustrating another example of a display process flow for an image captured by the omnidirectional cameras shown in FIG. 7.
  • FIG. 10 is a flow chart illustrating yet another example of a display process flow for an image captured by the omnidirectional cameras shown in FIG. 7.
  • FIG. 11 is a drawing showing an example of the display produced on a display section of an onboard display device in accordance with the present invention.
  • FIGS. 12( a), 12(b) are drawings showing designs of the display section when the example of the display produced on the display section in FIG. 11 is modified.
  • FIGS. 13( a), 13(b) are drawings showing designs of the display section when the example of the display produced on the display section in FIG. 11 is modified.
  • FIGS. 14( a), 14(b) are drawings showing examples of the secondary image display produced on the display section shown in FIG. 11.
  • BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1
  • The following will describe an embodiment of the present invention.
  • In the present embodiment, the onboard display device in accordance with the present invention is used as a display device which is part of an instrument panel on an automobile.
  • The onboard display system in accordance with the present embodiment contains an onboard display device 1 as shown in FIG. 2. The onboard display device 1 is mounted to an onboard instrument panel. The device 1 displays at least the speed of the vehicle. The device 1 may also display information on other conditions of the automobile. The device 1 includes a display section 11 and a display control section 12. The display section 11 includes a liquid crystal display panel for the display of secondary images. The display control section 12 controls the display on the display section 11. The display section 11 will be described later in detail. The secondary images include, for example, navigation images, television images, camera images, incoming/outgoing email message images, and other images which present information other than the information on the automobile per se (i.e., useful information to the driver and other passengers).
  • To display these various images on the display section 11, the display control section 12 is connected to a sensor system 14, a camera system 15, a navigation system 16, a television receiver system 17, and an email message transmission/reception system 18. The sensor system 14 collects information on the conditions of the automobile. The camera system 15 captures images around the automobile. The navigation system 16 produces a navigation image. The television receiver system 17 receives television image. The email message transmission/reception system 18 produces an email message transmission/reception image.
  • The display control section 12 includes a CPU 21 as a primary control section. The section 12 also includes a frame memory 22 temporarily record various image data.
  • The sensor system 14 includes an ignition-off release sensor 23, a speed sensor 24, a door open/close sensor 25, and a parking brake sensor 26. The ignition-off release sensor 23 detects the releasing of ignition's off-state of the automobile. The speed sensor 24 detects the traveling speed of the automobile. The door open/close sensor 25 detects an opening/closing of a door of the automobile. The parking brake sensor 26 detects an active parking brake of the automobile. Sensor outputs provide a basis for further processes (to be detailed later).
  • The camera system 15 may be mounted at any place on the body of the automobile. The system 15 includes a set of cameras so that they can capture images of the surroundings around the automobile (a 360° view, including the front, back, and sides). Preferable cameras for the system 15 are, for example, omnidirectional ones disclosed in Japanese published patent application 2003-125396 (Tokukai 2003-125396; published on Apr. 25, 2003). The layout of the omnidirectional cameras for the camera system 15 will be detailed later.
  • The navigation system 16, television receiver system 17, and email message transmission/reception system 18 are commonly used ones.
  • Now, the display section 11 will be described in reference to FIG. 1.
  • The display section 11, elongated widthwise, has an aspect ratio of 7:3. An aspect ratio is the width/height ratio of a display area (hereinafter, “screen size”). As shown in FIG. 1, the display section 11 provides two display areas at different screen sizes: a first display area 11 a at a screen size of 4:3 and a second display area 11 b at a screen size of 3:3.
  • The first display area 11 a displays a secondary image, for example, an image given by the navigation system (“navigation image”). The second display area 11 b displays a speedometer or other image presenting the conditions of the vehicle.
  • Typical screen sizes for a navigation image is 4:3, 15:9, and 16:9. The first display area 11 a is set up at a screen size of 4:3 accordingly.
  • The speed display on an instrument panel requires a screen size of 3:3 or greater in consideration of road safety. The second display area 11 b is set up at a screen size of 3:3 accordingly.
  • Having the landscape screen size of 7:3, the display section 11 is suited to produce both a navigation image and a speed display.
  • Conventional systems could not help but narrow down the speed display area to produce a navigation image or could only display too small a navigation image for the driver to easily obtain navigation information. These problems no longer happen with the 7:3 screen size.
  • Whilst the first display area 11 a with the 4:3 screen size is displaying, for example, a navigation image, the second display area 11 b with the 3:3 screen size provides a square display area where, for example, a speedometer can be displayed. A common speedometer display has a round shape. The second display area 11 b, being square, ensures a minimum level of visibility that is required. Driving safety can be improved with the display section 11 thus arranged.
  • The screen size of the display section 11 may exceed 7:3, for example, 8:3. When this is the case, the display section 11 can accommodate a first display area 11 a and a second display area 11 b, both at a screen size of 4:3. The onboard display device 1 is therefore fabricable by combining those existing liquid crystal display panels with the 4:3 screen size. At 30:9, the onboard display device 1 is similarly fabricable by combining those existing panels with a screen size of 15:9. At 32:9, the onboard display device 1 is fabricable again by combining those existing panels with a screen size of 16:9.
  • A liquid crystal display panel with a high resolution produces clear images. The navigation image and the speed display are highly visible, improving safety.
  • An example of such a high resolution liquid crystal display panel is shown in FIG. 3. The display panel 31 contains 468 or more horizontal rows of pixels in a screen size of 7:3. In other words, the display section 31 has 468 or more scan lines parallel to the longer side. The 7:3 screen size gives the number of columns (vertical lines) of pixels at 1092.
  • So, the display section 31 can accommodate two display areas in W-QVGA format (400 columns×234 rows) on top of each other. The areas are shown as a first display area 31 a and a second display area 31 b.
  • The areas 31 a, 31 b are capable of high resolution displays. Assigning a navigation image display to the first display area 31 a and a speed display to the second display area 31 b, the display section 31 produces an image display which is easily recognizable to the driver, improving safety.
  • With these 468 scan lines parallel to the longer side (“rows”), at least two displays, each in W-QVGA format, can fit into the screen on top of each other. Two displays are produced on top of each other at high resolution, allowing the driver make accurate decisions from the images. Therefore, for example, a moving image can be so clearly produced on the screen that the driver can readily recognize it. Road safety will be thus improved.
  • Preferably, the section 31 contains 480 rows, which is equal to the number of rows involved in the VGA and WVGA format. Accordingly, a secondary display can be produced in the VGA (Video Graphics Array; 640 columns×480 rows) or WVGA (Wide Video Graphics Array; 800 columns×480 rows) format, giving significantly high visibility.
  • Another example of a resolution-improved liquid crystal display panel is given in FIG. 4. The display section 32 has a screen size of 7:3. The section 32 contains 1200 or more columns.
  • The display section 32 can accommodate three display areas (first, second, and third display areas 32 a, 32 b, 32 c) side by side, each in the W-QVGA (400 columns×234 rows) format.
  • The section 32 is capable of a high resolution display in each display area. Thus, assigning, for example, a navigation image to the first display area 32 a, a speed display to the second display area 32 b, and a rear view display to the third display area 32 c, the display section 32 is capable of producing easily recognizable displays to the driver. Road safety will be thus improved.
  • Displays shown in the display areas are not limited to these examples. It is preferable if, for example, the displays present useful information to the driver or a fellow passenger.
  • To increase the visibility of the onboard display device 1, a display section 33 may be used which contains 1200 or more columns and 468 or more rows. See FIG. 5.
  • When each display area is in the Q-WVGA format (400 columns×234 rows), the section 33 can accommodate three or more display areas side by side and two or more display areas on top of each other. With each display area being in the W-QVGA format, the section 33 is capable of a high resolution display in each display area. The display section 32 is thus capable of producing easily recognizable displays to the driver. Road safety will be thus improved.
  • An example of such a screen is shown in FIG. 5. The display section 33 has four display areas: a first display area 33 a, a second display area 33 b, a third display area 33 c, and a fourth display area 33 d. The first display area 33 a appears on the left of the screen. The second and third display areas 33 b, 33 c are in the middle of screen, stacked on top of each other. The fourth display area 33 d appears on the right of the screen.
  • On the display section 33 thus arranged, one may assign, for example, a left-hand view display to the first display area 33 a, a front view display to the second display area 33 b, a rear view display to the third display area 33 c, and a right-hand view display to the fourth display area 33 d. See FIG. 6. With the entire scene around the vehicle being reproduced on the display section 33 in this manner, the driver can intuitively recognize the displays with no mistake. For example, the driver in a parked or otherwise stationary vehicle can reliably check the surroundings for traffic before starting. Road safety will be thus improved.
  • As to displays in this case, a left side image and a right side image are displayed on the left side and the right side respectively so that the width direction of the W-QVGA format is the height direction of the display device. Between them, the front is up, the back is down to produce a horizontally elongated display in the W-QVGA format. By producing a display in this manner, the driver can obtain sufficient information at high resolution in all the four directions. When vertically elongated video is to be displayed regarding the side, like when a camera shooting a side view is positioned at the side of the rooftop, such a display, the direction and the display match. Mistakes rarely occur in visual recognition.
  • To help recognize traffic ahead of and behind the automobile, preferably, the front view is displayed substantially at the center of the screen, slightly off center in an substantially upward direction. Such a displays is possible by means of superimposition and other image synthesis. The display helps reliable visual recognition by the drive, improving safety.
  • To make the display shown in FIG. 6 feasible, the aforementioned omnidirectional cameras for the camera system 15 may be mounted as shown in FIG. 7, as an example. According to FIG. 7, there are provided a first omnidirectional camera 15 a at the front left corner of the automobile 10, a second omnidirectional camera 15 b at the front right corner of the automobile 10, and a third omnidirectional camera 15 c at the mid-rear of the automobile 10.
  • An image captured by the first omnidirectional camera 15 a is displayed as a left-hand image in the first display area 33 a on the display section 33 in FIG. 6. Part of the captured image is displayed in the second display area 33 b as a front view display. The image captured by the second omnidirectional camera 15 b is displayed as a right-hand image in the fourth display area 33 d on the display section 33 in FIG. 6. Part of the captured image is displayed in the second display area 33 b as a front view display. The image captured by the third omnidirectional camera 15 c is displayed as a rear view display in the third display area 33 c on the display section in FIG. 6.
  • In this example, the four direction images produced on the display section 33 are fed from three omnidirectional cameras. Four or more omnidirectional cameras may be used instead.
  • The camera system 15 may not necessarily involve the aforementioned omnidirectional cameras. Alternatives include, for example, general CCDs and C-MOS image sensors equipped with a standard or wide-angle lens. These alternatives however have smaller shooting angles than the omnidirectional cameras.
  • Generally, the four direction images around the automobile 10 on the display section 33 may be useful if displayed before starting the automobile 10. The following will describe a flow of procedures to display the four direction images on the display section 33. Reference will be made to a block diagram in FIG. 2 and flow charts shown in FIG. 8 to FIG. 10.
  • First, a flow of procedures for producing a display will be described for a case where the four direction images are displayed on a display screen in response to an ignition turn-on action. Reference will be made to the flow chart in FIG. 8.
  • Relying on a detection signal from the ignition-off release sensor 23 (see FIG. 2), the display control section 12 determines whether the driver has turned on the ignition, in other words, released the ignition from off condition (step S1).
  • Upon determining that the driver has released the ignition from off condition, the section 12 turns on the power supply for the camera system 15 (step S2) to activate the omnidirectional cameras for omnidirectional imaging (step S3).
  • Thereafter, the section 12 turns on the display section 11 (step S4) and transmits the images captured by the omnidirectional cameras to the display section 11 (step S5).
  • The display section 11 then displays the received images, which are the latest images (step S6).
  • Subsequently, the display control section 12 determines, according to a signal from the speed sensor 24, whether the speed of the automobile exceeds 10 km (step S7).
  • Upon determining that the speed of the automobile does not exceed 10 km, the section 12 proceeds to step S5 where the display section 11 continues to display the latest images.
  • In contrast, if the section 12 determines in step S7 that the speed of the automobile exceeds 10 km, the section 12 deactivates the omnidirectional cameras (step S8) and switches to a standard display (navigation image, speed display, etc.) (step S9).
  • In step S7, the determination whether to deactivate the omnidirectional cameras is made based on the speed of the automobile. This is not the only possibility. For example, a parking brake sensor 26 may be used to make a decision based on whether the parking brake is released. Further, there may be provided a push button inside the vehicle which, when pressed, turns off the omnidirectional cameras.
  • Next, according to a detection signal from the ignition-off release sensor 23, the display control section 12 determines whether the ignition is turned off (step S10). This determination is made while the display section 11 is producing a standard display under the control of the section 12.
  • Upon determining that the ignition is turned off, the section 12 turns off the display section 11 (step S11) and also turns off the power supply for the camera system 15 (step S12). The display section 11 continues to produce a standard display until the ignition is determined to be turned off.
  • Now, a flow of procedures for producing a display will be described for a case where the four direction images are displayed on a display screen in response to a door unlock action. Reference will be made to the flow chart in FIG. 9.
  • First, the display control section 12 determines, according to a signal from a door unlock sensor 27, whether a vehicle door is unlocked (step S21). Upon determining that a door is unlocked, the section 12 turns on the power supply for the camera system 15 (step S22) to activate the omnidirectional cameras for omnidirectional imaging around the vehicle (step S23).
  • Images captured in step S23 are transmitted to the frame memory 22 in the display control section 12 for storage (step S24).
  • Subsequently, the display control section 12 determines, according to a signal from the ignition-off release sensor 23, whether the driver has released the ignition from off condition (step S25).
  • Upon determining that the driver has not released the ignition from off condition, the section 12 proceeds to step S23. The section 12 transmits the images captured by the omnidirectional cameras to the frame memory 22 for storage until the ignition is released from off condition.
  • In contrast, upon determining in step S25 that the driver has released the ignition from off condition, the section 12 turns on the display section 11. The display section 11 displays the images stored in the frame memory 22, in other words, the latest images captured, under the control of section 12 (step S27).
  • Subsequently, the display control section 12 determines, according to a signal from the speed sensor 24, whether the speed of the automobile exceeds 10 km (step S28).
  • Upon determining that the speed of the automobile does not exceed 10 km, the section 12 proceeds to step S23 where the display section 11 continues to display the latest images.
  • In contrast, if the section 12 determines in step S28 that the speed of the automobile exceeds 10 km, the section 12 deactivates the omnidirectional cameras (step S29), and switches to a standard display (navigation image, speed display, etc.) (step S30).
  • In step S28, the determination whether to deactivate the omnidirectional cameras is made based on the speed of the automobile. This is not the only possibility. For example, a parking brake sensor 26 may be used to make a decision based on whether the parking brake is released. Further, there may be provided a push button inside the vehicle which, when pressed, turns off the omnidirectional cameras.
  • Next, according to a detection signal from the ignition-off release sensor 23, the display control section 12 determines whether the ignition is turned off (step S31). This determination is made while the display section 11 is producing a standard display under the control of the section 12.
  • Upon determining that the ignition is turned off, the section 12 turns off the display section 11 (step S32) and also turns off the power supply for the camera system 15 (step S33). The display section 11 continues to produce a standard display until the ignition is determined to be turned off.
  • Now, a flow of procedures for producing a display will be described for a case where the four direction images are displayed on a display screen in response to a door open/close action. Reference will be made to the flow chart in FIG. 10.
  • First, according to a signal from the door open/close sensor 25, the display control section 12 determines whether a vehicle door, which was open, is now closed (step S41). Upon determining that an open door is now closed, the section 12 turns on the power supply for the camera system 15 (step S42) to activate the omnidirectional cameras for omnidirectional imaging around the vehicle (step S43).
  • Images captured in step S43 are transmitted to the frame memory 22 in the display control section 12 for storage (step S44).
  • Subsequently, the display control section 12 determines, according to a signal from the ignition-off release sensor 23, whether the driver has released the ignition from off condition (step S45).
  • Upon determining that the driver has not released the ignition from off condition, the section 12 proceeds to step S43. The section 12 transmits the images captured by the omnidirectional cameras to the frame memory 22 for storage until the ignition is released from off condition.
  • In contrast, upon determining in step S45 that the driver has released the ignition from off condition, the section 12 turns on the display section 11. The display section 11 displays the images stored in the frame memory 22, in other words, the latest images captured, under the control of the section 12 (step S47).
  • Subsequently, the display control section 12 determines, according to a signal from the speed sensor 24, whether the speed of the automobile exceeds 10 km (step S48).
  • Upon determining that the speed of the automobile does not exceed 10 km, the section 12 proceeds to step S43 where the display section 11 continues to display the latest images.
  • In contrast, if the section 12 determines in step S48 that the speed of the automobile exceeds 10 km, the section 12 deactivates the omnidirectional cameras (step S49), and switches to a standard display (navigation image, speed display, etc.) (step S50).
  • In step S48, the determination whether to deactivate the omnidirectional cameras is made based on the speed of the automobile. This is not the only possibility. For example, a parking brake sensor 26 may be used to make a decision based on whether the parking brake is released. Further, there may be provided a push button inside the vehicle which, when pressed, turns off the omnidirectional cameras.
  • Next, according to a detection signal from the ignition-off release sensor 23, the display control section 12 determines whether the ignition is turned off (step S51). This determination is made while the display section 11 is producing a standard display under the control of the section 12. Upon determining that the ignition is turned off, the section 12 turns off the display section 11 (step S52). The display section 11 continues to produce a standard display until the ignition is determined to be turned off.
  • The display control section 12 then determines, according to a signal from a sensor (not shown) detecting locked doors, whether the doors are locked (step S53). Upon determining that the doors are locked, the section 12 turns off the power supply for the camera system 15 (step S53).
  • Generally, omnidirectional checks are preferably done before starting the automobile 10. The driver can very safely start moving the automobile 10 with the help of the four direction image display on the display screen which occurs in response to an ignition turn-on action, the unlocking of a door, or the opening/closing of the door(s).
  • Embodiment 2
  • The following will describe another embodiment of the present invention. In the present embodiment, the onboard display device in accordance with the present invention is used as an onboard instrument panel as in embodiment 1.
  • The onboard display device in accordance with the present embodiment contains a display section 101 as shown in FIG. 11. The section 101 is capable of wide displays similarly to the display section 11 of embodiment 1 shown in FIG. 1. Unlike the display section 11 shown in FIG. 1, the display section 101 displays both secondary images and vehicle condition images at an identical aspect ratio of 4:3. The secondary images, not related to the speed and other conditions of the vehicle, are produced in a first display area 102. The vehicle condition images show the speed and other conditions of the vehicle and are produced in a second display area 103. The display section 101 has an aspect ratio of 8:3 accordingly.
  • The first display area 102 displays a navigation image 102 a. The second display area 103 displays a speed display image 103 a, as well as vehicle condition images 103 b presenting informing of the gear position, fuel gauge, etc. The speed display image 103 a shows a round speedometer. Reshaping the speedometer as a bar or representing it in numerals allows for a greater display area for the navigation image 102 a.
  • Bar speedometers are shown as examples on a display section 111 in FIGS. 12( a), 12(b). A numerical representation of the speedometer is shown as an example on a display section 121 in FIG. 13( a). Both the display sections 111, 121 have the same 8:3 aspect ratio as the display section 101 in FIG. 11.
  • The display section 111 in FIGS. 12( a), 12(b) shows a navigation image 112 a in a first display area 112. The image 112 a is extended widthwise reaching the area for the speed display image 103 a shown in FIG. 11. In FIGS. 12( a), 12(b), vehicle condition images 113 b, among the display images in the second display area 113, appear on the far right of the display section 111. The images 113 b appear at almost the same position as the vehicle condition images 103 b in the second display area 103 on the display section 101 in FIG. 11.
  • Referring to FIG. 12( a), the speed display image 113 a in the second display area 113 appear below the navigation image 112 a in the first display area 112. The image 113 a shows a horizontal speed indicator bar. In FIG. 12( b), the speed display image 113 a in the second display area appear between the navigation image 112 a in the first display area 112 and the vehicle condition images 113 b. The 113 a shows vertical speed indicator bar.
  • The display section 121 in FIGS. 13( a), 13(b) shows a navigation image 122 a in the first display area 122. As with the image 112 a in the display section 111, the image 122 a is extended widthwise reaching the area for the speed display image 103 a shown in FIG. 11. In FIGS. 13( a), 13(b), vehicle condition images 123 b, among the display images in the second display area 123, appear on the far right of the display section 121. The images 123 b appear at almost the same position as the vehicle condition images 103 b in the second display area 103 on the display section 101 shown in FIG. 11.
  • Referring to FIG. 13( a), the speed display image 123 a in the second display area 123 represents a numerical speedometer and appears in the top right corner of the navigation image 122 a in the first display area 122.
  • FIG. 13( b) shows another speed display image 123 a in the second display area 123. The image 123 a appears in the top right corner of the navigation image 122 a in the first display area 122 as with the one in FIG. 13( a). The speed display image 123 a represents a round speedometer as in FIG. 11. Round speedometers have a problem of extremely poor visibility.
  • Therefore, when a wide navigation image is shown in the display section, the speedometer is most telling in terms of visibility if it is shaped as a bar rather than a circle or represented by numerals.
  • To produce a large display of a secondary image (for example, when the driver backs to park the vehicle, a large rear view display is easy to see), the speedometer, tachometer, and other displays are inevitably produced at reduced size. A large display is sure to be produced if the image is superimposed; the overlapping of the images however decreases the visibility of the rear view display. Accordingly, the speedometer, tachometer, etc. may be given in numerals or shown in a linear shape.
  • These designs ease degradation in visibility even with limited available space. Road safety is further improved.
  • As mentioned earlier, the display area for a navigation image and other secondary images is preferably rendered variable when the driver needs the images to be shown in the display area for the secondary images.
  • In this case, if a navigation image is displayed at an increased scale in such a manner that a reference point is not stationary, but movable, display edges move and will highly likely distract the attention of the driver.
  • When the display area for secondary images is scaled up through no proper process without defining any reference point, display area edges may move and seriously distract the attention of the driver. Therefore, movements of the edge parts need be rendered not that eye-catching.
  • This is achieved by extending the image toward the driver seat with a reference point being defined at an edge part of the image closer to the front passenger seat. Referring to FIGS. 14( a), 14(b), the following will describe this method by way of an example.
  • A display section 201 shown in FIG. 14( a) shares an identical design with the display section 101 shown in FIG. 11. A display section 201 shown in FIG. 14( b) shares an identical design with the display section 121 shown in FIG. 13( a).
  • Here, in an alteration of the display section 201 from the design in FIG. 14( a) to the one in FIG. 14( b), a navigation image 202 a in the first display area 202 is extended toward the driver seat. A reference is given by a bus line (vertical display line) on the front passenger seat side of the navigation image 202 a in the first display area 202.
  • As a result of the alteration, a speed display image 203 a in the second display area 203 shown in FIG. 14( a) appears in FIG. 14( b) as a numerical speedometer in the top right corner of the now widened navigation image 202 a. The layout of the vehicle condition images 203 b of the second display area 203 has not changed in the scaling up of the navigation image 202 a.
  • As described in the foregoing, the visibility of the vehicle condition images in the display section 201 which has the same aspect ratio in FIG. 14( a) and FIG. 14( b) is prevented from decreasing in the scaling-up process of a secondary image, by altering the manner in which the vehicle condition images are displayed.
  • If a secondary image is displayed at an increased scale in such a manner that a reference point is not stationary, display edges move and will highly likely distract the attention of the driver.
  • Accordingly, the display control section scales up the secondary image with any one of the vertical bus line (vertical display line) of the image 202 on the driver's side or the vertical bus line (vertical display line) of the image 202 on the front passenger's side being fixed. The vertical bus line (vertical display line) on the unfixed side is altered.
  • Accordingly, either one of the bus lines (vertical display lines) of a secondary image is fixed. The secondary image is scaled up by allowing the other bus line (vertical display line) to change. One of the display edges is fixed. This approach eliminates undesirable image fluctuations and allows the driver to comfortably check the images while driving. The approach is provides better safety to the driver.
  • With the screen size being varied based on a fixed reference point, the display device becomes free from undesirable image fluctuations and allows the driver to comfortably check images.
  • Using the onboard display system in accordance with the present embodiment, the onboard display device 1 is capable of very wide image displays.
  • For example, when the driver backs the vehicle, the system presents a rear view fully across the wide screen. Thus, the display device is capable of highly visible displays when parking the vehicle, allowing the driver to safely drive backwards.
  • Specifically, upon a determination that the driver has selected the reverse gear, the display section 11 produces, under the control of the display control section 12, a rear view display at an aspect ratio of 2.3:1 or greater on the display screen of the display section 11. The determination is made by the display control section 12 based on a signal from a reverse gear selection sensor 28 shown in FIG. 2. The 2.3:1 or wider display when backing the vehicle provides very easy-to-see images.
  • For example, if the body of the vehicle is about 170 cm wide (e.g., Japanese compact cars), the parking space needs be about 230 cm wide which includes a 60 cm space for door opening/closing.
  • In a parking process, it is not sufficient to display only the space where the vehicle will be parked. it is desirable if at least about halves of adjacent parking spaces are visible.
  • A typical passenger vehicle is up to 2 m high.
  • Therefore, a display at an aspect ratio of 230×2/200=2.3 (:1) or greater is considered to be sufficient.
  • The resultant display device is capable of highly visible, wide displays at the 2.3:1 or greater aspect ratio when parking the vehicle, allowing the driver to safely drive backwards.
  • The embodiments are based on a assumption that the display panel for use in the display section is a liquid crystal panel. This is not meant to be limiting at all. The display panel may be a plasma display device, an organic or inorganic EL panel, CRT, or other like display device.
  • In the vehicle display device in accordance with the present invention, the control device activates the imaging device in response to an ignition-induced start-up of the engine in the vehicle or automobile. Under the control of the control device, the display section simultaneously displays images of the front, rear, right, and left of the vehicle.
  • The activation in response to the engine start-up, along with the simultaneous display of the front, rear, right, and left images on the display section, allows the drivers to reliably check for safety all around the vehicle before moving.
  • In addition, as to displays in this case, a left side image and a right side image are displayed on the left side and the right side respectively so that the width direction of the W-QVGA format is the extended width directions of the display areas on the display section. Preferably, between them, the front is up, the back is down to produce a horizontally elongated display in the W-QVGA format. By producing a display in this manner, the driver can obtain sufficiently information at high resolution in all the four directions. The direction and the display match. Mistakes rarely occurs in visual recognition.
  • The members in the onboard display device 1 and processing steps in accordance with the embodiments can be realized by a CPU or other computing means executing a computer program contained in a ROM (Read Only Memory), RAM, or other storage means to control a keyboard or like input means, a display device or like output means, or an interface circuit or like communications means. Therefore, the various functions and processes of the onboard display device of the present embodiment can be realized if a computer equipped with these means simply reads a storage medium containing the program and executing the program. In addition, if the program is contained in a removable storage medium, the various functions and processes can be realized on any given computer.
  • Such a computer program storage medium may be a memory (not shown), such as a ROM, so that the process is executable on a microcomputer. Alternatively, a program medium may be used which can be read by inserting the storage medium in an external storage device (program reader device; not shown).
  • In addition, in either of the cases, it is preferable if the contained program is accessible to a microprocessor which will execute the program. Further, it is preferable if the program is read and then downloaded to a program storage area of a microcomputer where the program is executed. Assume that the program for download is stored in a main body device in advance.
  • In addition, the program medium is a storage medium arranged so that it can be separated from the main body. Examples of such a program medium include a tape, such as a magnetism tape and a cassette tape; a magnetism disk, such as a flexible disk and a hard disk; a disc, such as a CD/MO/MD/DVD; a card, such as an IC card (inclusive of a memory card); and a semiconductor memory, such as a mask ROM, an EPROM (erasable programmable read only memory), an EEPROM (electrically erasable programmable read only memory), or a flash ROM. All these storage media holds a program in a fixed manner.
  • In addition, if the system is configured to be connectible to a communications network, such as the Internet, it is preferred that the storage medium contains the program in a flowing manner like downloading the program over the communications network.
  • Further, to download the program over the communications network, it is preferred if the program for download is stored in a main body device in advance or installed from another storage medium.
  • The embodiments and examples described in Best Mode for Carrying Out the Invention are for illustrative purposes only and by no means limit the scope of the present invention. Variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the claims below.
  • INDUSTRIAL APPLICABILITY
  • The onboard display device in accordance with the present invention improves on visibility, road safety, and ease in operation. The device is applicable as an onboard display device mounted, for example, to an automobile.

Claims (22)

  1. 1-12. (canceled)
  2. 13. An onboard display device attached to an instrument panel of a vehicle, comprising:
    a display screen having a resolution including at least 468 rows of pixels and at least 1092 columns of pixels, said display screen including a first area, a second area, a third area and a fourth area, wherein the first area and the fourth area are laterally elongated display areas with a row direction displayed as a column direction in the display screen, and the second area and the third area are laterally elongated display areas with the row direction displayed as the row direction in the display screen, the first area being displayed on a left-hand side of the display screen, the fourth area being displayed on a right-hand side of the display screen, the second area being displayed between and above the first area and the fourth area, and the third area being displayed between and below the first area and the fourth area.
  3. 14. The onboard display device of claim 13, wherein the first area is for displaying an image of an area of a left side of the vehicle, the second area is for displaying an image of an area of a front of the vehicle, the third area is for displaying an image of an area of a rear of the vehicle, and the fourth area is for displaying an image of an area of a right side of the vehicle.
  4. 15. The onboard display device of claim 13, wherein the first area, the second area, the third area and the fourth area are W-QVGA display areas.
  5. 16. A vehicle comprising the onboard display device of claim 13.
  6. 17. An onboard display device, comprising:
    a display section attached to an instrument panel of a vehicle, said display section showing a secondary image different from vehicle condition images indicating conditions of the vehicle in a first portion thereof and showing the vehicle condition images in a second portion thereof; wherein
    said display section is greater in width than in height and has an aspect ratio that is equal to or greater than approximately 7:3, the aspect ratio being a width/height ratio of a display area.
  7. 18. The onboard display device of claim 17, wherein the display section includes at least 468 lines arranged substantially parallel to a longer side of the display section.
  8. 19. The onboard display device of claim 17, wherein the display section includes at least 1200 lines arranged substantially parallel to a shorter side of the display section.
  9. 20. The onboard display device of claim 17, wherein the display section includes at least 468 lines arranged substantially parallel to a longer side of the display section and at least 1200 lines arranged substantially parallel to a shorter side of the display section.
  10. 21. The onboard display device of claim 17, further comprising a display control section arranged to control how the display section shows the secondary image and the vehicle condition images, wherein under control of said display control section, the secondary image appears partially on the second portion of the display section where the vehicle condition images are shown to show the secondary image at an increased scale and, the vehicle condition images are switched to be displayed in a different display manner, so as to display the secondary image at an increased scale.
  11. 22. The onboard display device of claim 21, wherein the display control section fixes any one of ends of a vertical display line of the secondary image in left/right directions and moves a vertical display line at a fixed end, so as to scale up the secondary image.
  12. 23. An onboard display system, comprising:
    an onboard display device including a display section attached to an instrument panel of a vehicle, the display section showing a secondary image different from vehicle condition images indicating conditions of the vehicle in a first portion thereof and showing the vehicle condition images in a second portion thereof, the display section being greater in width than in height and having an aspect ratio that is equal to or greater than approximately 7:3, the aspect ratio being a width/height ratio of a display area;
    imaging devices arranged to obtain images from areas near the front, rear, right, and left of the vehicle; and
    a control device arranged to control imaging operations of the imaging devices so that a front image, a rear image, a right-hand image, and a left-hand image obtained by the imaging devices can be all simultaneously shown on the display section of the onboard display device.
  13. 24. The onboard display system of claim 23, wherein under control of the control device, the imaging devices operate in response to an ignition-induced start-up of an engine in the vehicle, so that the front, rear, right-hand, and left-hand images can be all simultaneously shown on the display section.
  14. 25. A vehicle, comprising:
    an onboard display device including a display section attached to an instrument panel of a vehicle, the display section showing a secondary image different from vehicle condition images indicating conditions of the vehicle in a first portion thereof and showing the vehicle condition images in a second portion thereof, the display section being greater in width than in height and having an aspect ratio that is equal to or greater than approximately 7:3, the aspect ratio being a width/height ratio of a display area;
    an imaging device arranged to obtain an image from an area near the rear of the vehicle;
    a reverse gear selected to move the vehicle rearwardly; and
    a display control device arranged to control the onboard display device such that, upon activation of the reverse gear, the display section shows a widthwise elongated image of the area near the rear of the vehicle as obtained by the imaging device at an aspect ratio that is equal to or greater than approximately 2.3:1.
  15. 26. A vehicle, comprising:
    an onboard display device including a display section attached to an instrument panel of a vehicle, said display section showing a secondary image different from vehicle condition images indicating conditions of the vehicle in a first portion thereof and showing the vehicle condition images in a second portion thereof, said display section being greater in width than in height and having an aspect ratio that is equal to or greater than approximately 7:3, the aspect ratio being a width/height ratio of a display area.
  16. 27. A vehicle, equipped with an onboard display system comprising:
    an onboard display device including a display section attached to an instrument panel of a vehicle, the display section showing a secondary image different from vehicle condition images indicating conditions of the vehicle in a first portion thereof and showing the vehicle condition images in a second portion thereof, the display section being greater in width than in height and having an aspect ratio that is equal to or greater than approximately 7:3, the aspect ratio being a width/height ratio of a display area;
    imaging devices arranged to obtain images of areas near the front, rear, right, and left of the vehicle; and
    a control device arranged to control imaging operations of the imaging devices so that a front image, a rear image, a right-hand image, and a left-hand image obtained by the imaging devices can be all simultaneously shown on the display section of the onboard display device.
  17. 28. The vehicle of claim 27, wherein under control of the control device, the imaging devices operate in response to an ignition-induced start-up of an engine, so that the front, rear, right-hand, and left-hand images can be all simultaneously shown on the display section.
  18. 29. The onboard display device according to claim 17, wherein the vehicle condition images include at least one of a vehicle speed image, a gear shift image, and a fuel quantity image, and the secondary image includes at least one of a navigation image, a camera image, and a non-vehicle information image.
  19. 30. The onboard display system according to claim 23, wherein the vehicle condition images include at least one of a vehicle speed image, a gear shift image, and a fuel quantity image, and the secondary image includes at least one of a navigation image, a camera image, and a non-vehicle information image.
  20. 31. The vehicle according to claim 25, wherein the vehicle condition images include at least one of a vehicle speed image, a gear shift image, and a fuel quantity image, and the secondary image includes at least one of a navigation image, a camera image, and a non-vehicle information image.
  21. 32. The vehicle according to claim 26, wherein the vehicle condition images include at least one of a vehicle speed image, a gear shift image, and a fuel quantity image, and the secondary image includes at least one of a navigation image, a camera image, and a non-vehicle information image.
  22. 33. The vehicle according to claim 27, wherein the vehicle condition images include at least one of a vehicle speed image, a gear shift image, and a fuel quantity image, and the secondary image includes at least one of a navigation image, a camera image, and a non-vehicle information image.
US10598098 2004-02-20 2005-02-16 Onboard Display Device, Onboard Display System and Vehicle Abandoned US20080150709A1 (en)

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US12103158 US20080197990A1 (en) 2004-02-20 2008-04-15 Onboard display device, onboard display system and vehicle
US12103164 US20080204205A1 (en) 2004-02-20 2008-04-15 Onboard display device, onboard display system and vehicle
US12827167 US7969294B2 (en) 2004-02-20 2010-06-30 Onboard display device, onboard display system and vehicle

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US12103167 Abandoned US20080252439A1 (en) 2004-02-20 2008-04-15 Onboard display device, onboard display system and vehicle
US12103164 Abandoned US20080204205A1 (en) 2004-02-20 2008-04-15 Onboard display device, onboard display system and vehicle
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