JP5157663B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a display device for a vehicle that displays information related to the following traveling in a vehicle that follows the preceding vehicle according to the control of the traveling control means.

Conventionally, as a kind of display device for a vehicle, in Patent Documents 1 and 2, a vehicle traveling in front of the host vehicle is set as a follow-up target, and the host vehicle travels so as to maintain an inter-vehicle distance with respect to the preceding vehicle. An apparatus for displaying travel control means control information when controlled by a control means is disclosed. In the vehicle display devices disclosed in these Patent Documents 1 and 2, specifically, when the traveling control means detects a preceding vehicle that is a target for causing the host vehicle to follow, the control representing the control information of the traveling control means. An image imitating a vehicle or the like is displayed as the information image.
JP 2006-234442 A Japanese Patent Laid-Open No. 11-42957

  However, the vehicle display devices disclosed in Patent Documents 1 and 2 only display only the control information image of the travel control unit according to the detection of the preceding vehicle that the travel control unit is subject to following traveling. . Therefore, the driver can determine the presence or absence of a preceding vehicle that the traveling control means is subject to following traveling, but cannot specify which of the vehicles on the road is the preceding vehicle. Here, on the road, the change of the preceding vehicle that the traveling control means follows according to the interruption of the other vehicle between the preceding vehicle and the own vehicle or the departure of the preceding vehicle from the front of the own vehicle by changing the lane, etc. Is likely to occur. Therefore, when the display that can identify the preceding vehicle to be followed is not made, the driver cannot recognize the change of the preceding vehicle to be followed and may be confused.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle display device that enhances driver drivability with respect to vehicle follow-up running.

In order to achieve the above object, according to the first aspect of the present invention, in the vehicle that travels following the preceding vehicle according to the control of the traveling control means while irradiating the near infrared light forward by the near infrared projector, A display device for a vehicle that displays information related to follow-up traveling, a front image acquired by a near-infrared camera as an imaging unit that images a front area of the vehicle, and a near-infrared light irradiated by a near-infrared projector Among them, the travel control means causes the vehicle to follow the vehicle based on the control information related to the control of the travel control means from the front image obtained by detecting the near infrared light reflected by the front obstacle including the preceding vehicle. an image of a leading vehicle by being extracted as the follow-up run target image extracting means for a change in vertical position of the follow-up run target image is further extracted from the forward image, leading vehicle Oyo By including at least one image indicating the set speed set in the image and running control means indicating the inter-vehicle distance between vehicles, and drawing means for forming a control information image representing control information, follow-up running target image in the front image A display means for superimposing and displaying a control information image around and for changing a display position of the control information image in accordance with a change in a vertical position of the follow target image extracted by the extraction means. Features .
In the invention according to claim 2, in the vehicle that travels following the preceding vehicle according to the control of the traveling control means while displaying the near infrared light forward by the near infrared projector, information on the following traveling is displayed. A front image acquired by a near-infrared camera as an imaging means for imaging a front area of the vehicle, and the vehicle in front of the near-infrared light emitted by the near-infrared projector Based on the control information related to the control of the travel control means, from the front image acquired by detecting the near infrared light reflected by the front obstacle, including the front running vehicle in which the travel control means causes the vehicle to follow the vehicle An image is extracted as a follow-up target image, and an extraction means for further extracting a change in the horizontal position of the follow-up target image from the front image and an inter-vehicle distance between the preceding vehicle and the vehicle A control unit image and a drawing unit that forms a control information image representing control information by including at least one of an image indicating a set speed set in the traveling control unit, and a control information image around the following traveling target image in the front image And a display means for changing the display position of the control information image so as to follow the change in the horizontal position of the follow-up travel target image extracted by the extraction means.

According to these inventions, from the obtained front image by the imaging means for capturing an area ahead of the vehicle, based on the control information of the travel control means, run before the running control means is allowed to travel following the vehicle A car image is extracted as a follow-up target image. Then, a control information image representing the control information of the travel control means is displayed superimposed on the front image around the extracted following travel target image. Therefore, the driver can specify the preceding vehicle that the traveling control device is subject to following traveling from the superimposed display of the following traveling target image and the surrounding control information image. Moreover, even if the preceding vehicle targeted for the follow-up running by the running control means is changed, the follow-up running target image indicating the preceding running target vehicle is also changed, and the changed follow-up running target image is surrounded by the change. The control information image is displayed in a superimposed manner. Therefore, the driver can also recognize the change of the preceding vehicle that the traveling control means is subject to following traveling by changing the position where the control information image is displayed. According to the above, the drivability of the driver can be enhanced with respect to the vehicle following traveling. In addition, even at night and in dark places where there is a small amount of visible light, the front area of the vehicle is correctly imaged by the imaging means that is a near-infrared camera, and the tracking target image is extracted from the front image acquired by the imaging can do. Therefore, according to the control information image being superimposed and displayed around the extracted follow-up target image, information necessary for follow-up running at night or in a dark place can be accurately provided to the driver. It can give you a sense of security .
According to the invention of claim 1, when the relative position in the vertical direction with respect to the host vehicle changes with respect to the preceding vehicle that the traveling control means is subject to following traveling, such as when the slope of the road on which the host vehicle travels changes. The vertical position of the follow target image in the front image also changes. Therefore, by extracting a change in the vertical position of the follow-up target image and changing the display position of the control information image so as to follow the change, the control information image can always be displayed around the follow-up target image. it can. Therefore, even on the road where the gradient changes, the driver can accurately identify the preceding vehicle that the traveling control device is subject to following traveling and can realize high drivability.
On the other hand, according to the invention of claim 2, when the relative position in the horizontal direction with respect to the host vehicle changes in relation to the preceding vehicle that the traveling control means is subject to following traveling, such as when the host vehicle travels on a road that bends in the horizontal direction. The horizontal position of the follow-up running image in the front image also changes. Therefore, by extracting a change in the horizontal position of the follow-up target image and changing the display position of the control information image so as to follow the change, the control information image can always be displayed around the follow-up target image. it can. Therefore, even on a road that bends in the horizontal direction, the driver can accurately identify the preceding vehicle that the traveling control device is subject to following traveling and can realize high drivability.

In general, the travel control means uses the nearest preceding vehicle as a target for follow-up travel. Here, in the front image acquired by the imaging means, the image of the preceding vehicle that is closer to the host vehicle is reflected on the lower side. Therefore, in the invention according to claim 3 , when the front image includes a plurality of front-running vehicles, the extraction means follows the image of the front-running vehicle located on the lowermost side of the front image. Extract as

  According to this invention, the image of the preceding vehicle positioned at the lowermost side of the front image, that is, the image of the preceding vehicle that the traveling control means is subject to following traveling by being closest to the host vehicle, Can be extracted accurately. According to this, it is possible to appropriately provide the driver with the information necessary for the follow-up traveling and to improve drivability.

In the invention according to claim 4 , the extraction means is a follow-up travel target image based on inter-vehicle distance information that represents a distance between the preceding vehicle and the vehicle that the travel control means is subject to follow-up travel of the control information. To extract.

  According to the present invention, when the distance between the host vehicle and the preceding vehicle that the traveling control unit is subject to following traveling changes, the position of the following traveling target image in the front image also changes. Therefore, based on the inter-vehicle distance information that represents the distance between the preceding vehicle and the host vehicle that is the tracking target of the traveling control means in the control information, the tracking target image can be extracted from the front image with high accuracy. Become. Therefore, the display of the following traveling target image in which the control information image is superimposed on the periphery allows the driver to accurately identify the preceding vehicle that the traveling control device is subject to following traveling and realize high drivability. It is.

In the invention according to claim 5 , the extraction means is a follow-up running target based on vertical position information representing a relative position in a vertical direction with respect to the vehicle of the preceding vehicle that the run control means is a follow-up run target of the control information. Extract images.

  According to the present invention, when the relative position in the vertical direction with respect to the host vehicle changes with respect to the preceding vehicle to be tracked by the travel control unit, such as when the slope of the road on which the host vehicle travels changes, the tracking in the front image is performed. The vertical position of the travel target image also changes. Therefore, based on the vertical position information representing the relative position in the vertical direction with respect to the host vehicle of the preceding vehicle that is the target of the following traveling of the traveling control means in the control information, the following target traveling image can be obtained with high accuracy from the front image. Extraction becomes possible. Therefore, even on a road where the slope changes, the driver can accurately identify the preceding vehicle that the traveling control device is subject to following traveling by displaying the following traveling target image with the control information image superimposed on the surroundings. You can feel high drivability.

In the invention according to claim 6 , the extraction means is a follow-up running target based on horizontal position information representing a relative position in the horizontal direction with respect to the vehicle of the preceding vehicle that the run control means is a follow-up run target of the control information. Extract images.

  According to the present invention, when the host vehicle travels on a road that bends in the horizontal direction or the like, if the relative position in the horizontal direction with respect to the host vehicle changes with respect to the preceding vehicle to be tracked by the travel control unit, the tracking in the front image The horizontal position of the travel target image also changes. Therefore, based on the horizontal position information that represents the relative position in the horizontal direction with respect to the host vehicle of the preceding vehicle that is the target of the follow-up travel of the travel control means in the control information, the follow-up target image can be accurately obtained from the front image. Extraction becomes possible. Therefore, even on a road that bends in the horizontal direction, the driver can accurately identify the preceding vehicle that the traveling control device is subject to following traveling by displaying the following traveling target image with the control information image superimposed on the surroundings. You can feel high drivability.

In the invention according to claim 7 , the display means displays the control information image superimposed on the lower side of the follow target image in the front image.

  According to the present invention, in the front image, the road surface located between the preceding vehicle and the host vehicle that the traveling control device is subject to following traveling is displayed below the following traveling target image. A region with little change is formed. By displaying the control information image superimposed on the lower side of the follow-up target image, which is an area where there is little change in the image, the driver can easily view the control information image, and the travel control device can It is possible to instantly identify the vehicle in front and to realize high drivability.

In the invention according to claim 8 , the display means displays a frame image that emphasizes the preceding vehicle targeted for the follow-up running by the running control means along the outer periphery of the follow-up running target image in the front image.

  According to the present invention, in addition to the control information image, the frame image along the outer periphery of the follow-up target image is displayed in a superimposed manner, so that the driver specifies the preceding vehicle that the travel control means targets for follow-up running. It becomes easy to do. Therefore, the drivability related to the vehicle following traveling can be further enhanced.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a vehicle 10 including a vehicle display device 100 according to an embodiment of the present invention. In addition to the vehicle display device 100, an adaptive cruise control device (ACC device) 11, a vehicle control device 15, and a night vision device 13 are mounted on the vehicle 10.

  The ACC device 11 is a device that performs so-called adaptive cruise control that detects the preceding vehicle and follows the vehicle while maintaining the distance between the host vehicle 10 and the preceding vehicle at a desired interval. The ACC device 11 is configured around an adaptive cruise control circuit (ACC circuit) 11a, and includes a radar transmitter 11b, a radar receiver 11c, and an operation switch 11d.

  The ACC circuit 11a is composed of a microcomputer, a CPU that executes various arithmetic processes for performing adaptive cruise control, a ROM that stores programs and various maps for executing the arithmetic processes, and information necessary for the arithmetic processes. It has a RAM for temporary storage.

  The ACC circuit 11a is electrically connected to the radar transmitter 11b, the radar receiver 11c, the operation switch 11d, and the vehicle control device 15. The ACC circuit 11a acquires information related to the preceding vehicle necessary for adaptive cruise control by the radar transmitter 11b and the radar receiver 11c. Specifically, this information includes inter-vehicle distance information that represents the distance between the preceding vehicle and the host vehicle 10 that the ACC device 11 is subject to following traveling, and the vertical and horizontal directions of the preceding vehicle with respect to the host vehicle. This is vertical / horizontal position information representing the relative position of the direction. The radar transmitter 11b and the radar receiver 11c are accommodated in a front bumper 10a that is a front end of the vehicle 10. The radar transmitter 11b transmits a millimeter wave toward a predetermined angle range in front of the host vehicle 10, and the radar receiver 11c receives the millimeter wave reflected by a front obstacle including the preceding vehicle. Thereby, the distance and direction to the front obstacle including the preceding vehicle are detected, and information on the preceding vehicle that is the target of the following traveling is acquired from the detection result. In addition, the ACC circuit 11a acquires information such as the vehicle speed, engine rotation speed, and brake control of the host vehicle 10 necessary for adaptive cruise control from the vehicle control device 15.

  The operation switch 11 d is installed near the steering wheel 17 a of the vehicle 10. When the driver operates the operation switch 11d, the start and end of control and the cruise speed of the vehicle 10 are set by the ACC circuit 11a. When the operation switch 11d is operated, the ACC circuit 11a starts detection of the preceding vehicle that is the target of the follow-up traveling based on the information acquired from the radar receiver 11c. When the preceding vehicle is detected, the ACC circuit 11a determines that the distance from the preceding vehicle becomes the target inter-vehicle distance based on the information from the radar receiver 11c and the information from the vehicle control device 15. An acceleration / deceleration command is issued to the control device 15. For example, if the ACC circuit 11a detects a preceding vehicle that cruises at a lower speed than the cruising speed set in the ACC circuit 11a in front of the own vehicle 10, the ACC circuit 11a decelerates the own vehicle 10 to the speed of the preceding vehicle. A deceleration command is issued to the vehicle control device 15. When the preceding vehicle leaves the front of the host vehicle 10 due to a lane change or the like, the ACC circuit 11a does not detect the preceding vehicle that should follow the front of the host vehicle 10. In this case, the ACC circuit 11a issues an acceleration command to the vehicle control device 15 so as to accelerate the host vehicle 10 to the cruising speed set in the ACC circuit 11a.

  Here, in particular, the ACC circuit 11a of the present embodiment targets the closest preceding vehicle for follow-up traveling. Therefore, in the case where there are a plurality of preceding vehicles, if the closest preceding vehicle changes due to a lane change or the like, the preceding vehicle subject to the follow-up traveling is changed.

  The vehicle control device 15 is electrically connected to an engine and a transmission (not shown). The vehicle control device 15 controls the actuator of the electronically controlled throttle of the engine and the electromagnetic solenoid of the transmission according to the command from the ACC circuit 11a, etc., thereby generating acceleration / deceleration in the vehicle 10 and increasing the speed of the host vehicle 10 To control.

  The night vision device 13 is a device that can image the front of the vehicle 10 even in a situation where the amount of visible light during the day is large, or in a situation where there is a small amount of visible light such as at night or in a dark place. The night vision device 13 includes a near-infrared camera 13c and a near-infrared projector 13i.

  The near-infrared projector 13i emits near-infrared light having a wavelength of about 900 to 1500 nanometers, which is invisible light. The near-infrared projector 13i is installed in the front headlight module 10b of the vehicle 10, and irradiates near-infrared light to a predetermined angle range in front of the vehicle 10 using a reflector in the front headlight module 10b. . The near infrared projector 13i may be installed on the front bumper 10a.

  The near-infrared camera 13c is an image sensor that converts the intensity of near-infrared light into an electrical signal by an image sensor and outputs the electrical signal. The near-infrared camera 13 c is installed between the interior ceiling 16 of the vehicle 10 and the windshield 18, and has an imaging surface facing the front of the vehicle 10. The near-infrared camera 13c detects the near-infrared light reflected by the front obstacle including the preceding vehicle from the near-infrared light irradiated by the near-infrared projector 13i at night or in a dark place. A front area, for example, an area of about 40 to 250 meters can be imaged correctly. The near-infrared camera 13c captures the above-described front area of the vehicle 10 by detecting near-infrared light reflected by a front obstacle including a preceding vehicle out of near-infrared light included in sunlight during the daytime. it can.

  As described above, in the present embodiment, the ACC device 11 corresponds to the traveling control unit described in the claims, and the near-infrared camera 13c corresponds to the imaging unit described in the claims.

  Hereinafter, a vehicle display device 100 according to an embodiment of the present invention will be described. As shown in FIG. 1, the vehicular display device 100 is accommodated in the instrument panel 17 of the vehicle 10 and installed so that the screen 80 faces the driver's seat 19 side.

  FIG. 2 shows an electric circuit configuration of the vehicle display device 100. The vehicle display device 100 functions as a combination meter, and includes a display device 70, an image processing circuit 30, an extraction circuit 40, a display control circuit 50, and the like. The vehicle display device 100 is electrically connected to the ACC device 11, the near-infrared camera 13 c, and the vehicle control device 15.

  The display device 70 includes a liquid crystal panel 71, a backlight 73, and the like. The liquid crystal panel 71 is a dot matrix type TFT transmissive liquid crystal panel having a plurality of pixels arranged in a matrix, and realizes image display on the screen 80 by driving each pixel. Here, each pixel of the liquid crystal panel 71 is composed of sub-pixels of three colors provided with red (R), green (G), and blue (B) color filters, respectively. Display is possible.

  Here, the screen 80 on which the liquid crystal panel 71 of the present embodiment displays an image is composed of a plurality of pixels. As shown in FIG. 3, a first pixel area 85 for displaying a meter image 83 and a forward image 87 composed of a plurality of pixels. And a second pixel region 89 for displaying.

  Specifically, the meter image 83 is an image for instructing the driver of the state value of the vehicle 10, and in this embodiment, a vehicle speed display image 83a indicating the vehicle speed, a water temperature display image 83b indicating the temperature of the engine cooling water, A remaining amount display image 83c indicating the remaining amount of fuel, a shift position display image 83d indicating the shift position of the transmission, and a background image 83e indicating the background are included. The first pixel area 85 is defined in a rectangular outer peripheral portion excluding the central portion on the screen 80, and displays the meter image 83 (83a to 83e) by driving each pixel constituting the area 85.

  The forward image 87 is an image obtained by capturing a predetermined area in front of the vehicle 10 with the near-infrared camera 13c. In the present embodiment, the forward image 87 is a night view image that can be displayed even at night or when the vehicle 10 passes through a dark place. . The second pixel area 89 is defined in the central portion of the screen 80 surrounded by the first pixel area 85, and the front image 87 is displayed by driving each pixel constituting the area 89.

  As shown in FIGS. 2 and 4, the backlight 73 is provided on the back side opposite to the screen 80 side of the liquid crystal panel 71, and includes a light emitting diode 73a and a diffusion plate 73b. The light emitting diode 73a is a chip type, is electrically connected to the display control circuit 50, and emits light according to a signal given from the display control circuit 50. The diffusion plate 73 b is formed in a flat plate shape with a light transmissive resin, and is disposed on the back side of the liquid crystal panel 71 in parallel with the panel 71. The diffusion plate 73b diffuses the incident light from the adjacent light emitting diode 73a and emits it from the light emitting surface 73c on the liquid crystal panel 71 side, so that the light emission luminance on the light emitting surface 73c is made uniform over the entire area. . As described above, the backlight 73 illuminates and transmits the entire liquid crystal panel 71 from behind by the light from the light emitting surface 73c.

  As shown in FIG. 2, the image processing circuit 30 includes a microcomputer, and is installed in the vehicle 10 and electrically connected to the near-infrared camera 13c. The image processing circuit 30 processes the electrical signal acquired from the near-infrared camera 13c, thereby forming a front image 87 of the vehicle front area.

  The extraction circuit 40 is composed of a microcomputer, is installed on the opposite side of the light emitting diode 73a from the liquid crystal panel 71 (see FIG. 4), is installed in the vehicle, and is electrically connected to the image processing circuit 30. The extraction circuit 40 acquires a front image 87 of the vehicle front area formed by the image processing circuit 30.

  The display control circuit 50 is composed of a microcomputer and is installed on the side opposite to the liquid crystal panel 71 (see FIG. 4). The display control circuit 50 includes an image memory 63 and is electrically connected to the liquid crystal panel 71, the light emitting diode 73a of the backlight 73, the extraction circuit 40, and the vehicle control device 15. The display control circuit 50 acquires the detection result information of the ignition switch of the vehicle 10 and the state value of the vehicle 10 via the vehicle control device 15 that is electrically connected to various sensors (not shown) mounted on the vehicle 10. The state value of the vehicle 10 is detection result information such as a vehicle speed, an engine coolant temperature, a fuel remaining amount, and a shift position displayed as a meter image 83 in the first pixel area 85 of the liquid crystal panel 71. The display control circuit 50 controls the light emission of the light emitting diode 73 a and the drive of the pixels of the liquid crystal panel 71 based on the acquired information and the like.

  Here, the image memory 63 includes an EEPROM, and a meter image 83 is stored in advance as image information before the apparatus 100 is shipped from the factory. The display control circuit 50 reads the necessary meter image 83 from the image memory 63 and drives the constituent pixels in the first pixel region 85 to display the meter image 83 on the screen 80. Further, the display control circuit 50 receives the front image 87 of the vehicle front area from the extraction circuit 40, and drives each component pixel of the second pixel area 89 to display the front image 87 on the screen 80.

  As described above, in the present embodiment, the display device 70 corresponds to the display unit described in the claims, the display control circuit 50 corresponds to the drawing unit described in the claims, and the extraction circuit 40 corresponds to the extraction unit described in the claims. .

(Characteristic part)
Subsequently, characteristic portions of the vehicle display device 100 according to the present embodiment will be described.

  As shown in FIG. 2, the extraction circuit 40 is electrically connected to the ACC circuit 11a. When the circuit 11a detects or changes the preceding vehicle to be followed, the extraction circuit 40 operates as follows. First, the extraction circuit 40 obtains the inter-vehicle distance information indicating the distance between the preceding vehicle that the ACC circuit 11a is subject to following traveling and the host vehicle 10 and the vertical / horizontal position information about the preceding vehicle. Obtained from the circuit 11a. Subsequently, the extraction circuit 40 performs an image extraction process based on the inter-vehicle distance information and the vertical / horizontal position information acquired from the ACC circuit 11a on the front image 87 acquired from the image processing circuit 30. As a result, the extraction circuit 40 extracts from the front image 87 a follow-up running target image 87a (see FIG. 3) that shows the preceding vehicle that the ACC circuit 11a is to follow up.

  Here, the inter-vehicle distance information is used to extract the follow-up travel target image 87a when the inter-vehicle distance between the preceding vehicle to be followed and the host vehicle 10 changes accordingly. This is because the position of the target image 87a also changes. Further, the vertical position information is used for the extraction of the follow-up travel target image 87a. When the relative position in the vertical direction with respect to the host vehicle 10 changes with respect to the preceding vehicle subject to the follow-up travel target, the follow-up in the front image 87 is accordingly performed. This is because the vertical position of the travel target image 87a also changes. Further, the horizontal position information is used for extracting the follow-up travel target image 87a because the follow-up in the front image 87 correspondingly changes in the horizontal relative position with respect to the host vehicle 10 with respect to the preceding vehicle to be followed. This is because the horizontal position of the travel target image 87a also changes.

  As described above, the ACC circuit 11a of the present embodiment is configured to set the preceding vehicle closest to the host vehicle 10 as the target of the following traveling. Here, in the front image 87, the front obstacle closer to the host vehicle 10 is reflected on the lower side. Therefore, when the front image 87 includes a plurality of images of the preceding vehicle, the extraction circuit 40 according to the present embodiment extracts the image of the preceding vehicle that appears on the lowermost side of the front image 87 as the follow-up traveling object image 87a. .

  Furthermore, the extraction circuit 40 of the present embodiment uses the vertical direction of the preceding vehicle relative to the host vehicle 10 for the front image 87 obtained by extracting the following traveling target image 87a according to the detection or change of the preceding traveling target vehicle. A change in the vertical position of the image 87a due to the change in position after extraction is extracted by performing image recognition processing. Similarly, with respect to the front image 87, the extraction circuit 40 determines a change in the horizontal position of the follow-up travel target image 87a due to a change in the horizontal relative position of the preceding vehicle to be followed after the follow-up travel target image 87a. The image is extracted by performing image recognition processing.

  Thus, the extraction circuit 40 calculates the current position information of the follow-up travel target image 87a in the front image 87 from the change in the vertical / horizontal position extracted for the follow-up travel target image 87a, and the calculated information together with the front image 87. This is output to the display control circuit 50.

  The display control circuit 50 forms a control information image 88 and a frame image 87b to be displayed on the screen 80 of the liquid crystal panel 71 as shown in FIG. Specifically, the control information image 88 includes a preceding vehicle icon 88a that indicates the presence or absence of a preceding vehicle that the ACC circuit 11a is subject to following traveling, and an inter-vehicle indicator 88b that indicates the distance between the preceding vehicle and the host vehicle 10. The set speed indicator 88c indicating the cruising speed set in the ACC circuit 11a is combined. Here, the forward vehicle icon 88a is an image imitating a vehicle. The inter-vehicle distance indicator 88b is a composite image formed by combining a plurality of trapezoidal images. The number of trapezoidal images displayed as the inter-vehicle distance indicator 88b corresponds to the inter-vehicle distance between the preceding vehicle that the ACC circuit 11a is subject to follow-up and the host vehicle 10, and the number of trapezoidal images decreases as the distance decreases. A small number is displayed. Furthermore, the frame image 87b is an image for emphasizing the preceding vehicle that the ACC circuit 11a is subject to following traveling, and is a rectangular line-shaped image having a highly attractive color.

  As shown in FIG. 2, the control information image 88 (88a, 88b, 88c) and the frame image 87b are stored in advance in the image memory 63 as image information. The display control circuit 50 reads the necessary control information image 88 and the frame image 87b from the image memory 63 when receiving the front image 87 and the position information of the follow-up travel target image 87a in the image 87 from the extraction circuit 40. Then, the display control circuit 50 drives each constituent pixel of the second pixel area 89 based on the position information of the follow-up travel target image 87a in the front image 87, thereby causing the control information image 88 and the frame image to be shown in FIG. 87b is displayed on the screen 80 of the liquid crystal panel 71. Thus, in the present embodiment, the control information image 88 is displayed superimposed on the lower side of the tracking target image 87a in the front image 87, and the frame image surrounds the tracking target image 87a along the outer periphery thereof. 87b is displayed superimposed. Further, in this embodiment, while the ACC circuit 11a does not change the preceding vehicle to be followed, the display positions of the control information image 88 and the frame image 87b are in the vertical and horizontal directions of the following image 87a in the front image 87. It will be changed following the change in position.

  In the present embodiment described above, when the preceding vehicle to be followed is detected by the ACC circuit 11a, the following traveling which is an image of the preceding vehicle in the front image 87 displayed on the screen 80 of the liquid crystal panel 71. A control information image 88 and a frame image 87b are superimposed and displayed on the target image 87a. Therefore, the driver can specify which of the vehicles on the road is the preceding vehicle to be followed by the position where the images 88 and 87b are displayed in the front image 87. In addition, when the preceding running target vehicle is changed by the ACC circuit 11a, the image extracted as the following running target image 87a is changed to one corresponding to the changed preceding running vehicle, The control information image 88 and the frame image 87b are superimposed and displayed on the changed follow-up travel target image 87a. Therefore, the driver can easily and accurately recognize the change of the preceding vehicle that is the target of the follow-up running by changing the position where the images 88 and 87b are displayed in the front image 87. According to the above, the driver's drivability can be improved with respect to the following traveling of the vehicle 10 by adaptive cruise control.

  Here, particularly in the present embodiment, the vertical position of the follow-up travel target image 87a in the front image 87 can be estimated by the extraction circuit 40 based on the inter-vehicle distance information and the vertical position information acquired from the ACC circuit 11a. The following traveling target image 87a can be extracted from the front image 87 with high accuracy during the following traveling on the road where the gradient changes. Similarly, in the present embodiment, the horizontal position of the follow-up running target image 87a in the front image 87 can be estimated by the extraction circuit 40 based on the horizontal position information acquired from the ACC circuit 11a, so follow-up on a road that bends in the horizontal direction. During traveling or the like, the follow traveling target image 87a can be extracted from the front image 87 with high accuracy. According to these high-accuracy image extraction actions, the ACC circuit 11a accurately displays the control information image 88 on the lower side of the follow-up travel target image 87a. It is possible to accurately identify the vehicle in front of the car and realize high drivability.

  Particularly in the present embodiment, even if the vertical position of the follow-up travel target image 87a in the front image 87 changes due to a change in the slope of the road on which the host vehicle 10 travels, control is performed following the change. The display position of the information image 88 can be changed. Similarly, in the present embodiment, even if the horizontal position of the follow-up travel target image 87a in the front image 87 changes due to the road on which the host vehicle 10 travels bends in the horizontal direction, the control information image follows the change. The display position of 88 can be changed. According to these display position changing actions, the driver can accurately identify the preceding vehicle to be followed and can realize high drivability regardless of the slope or turn of the road on which the vehicle 10 travels. Can do it.

  In addition, particularly in the present embodiment, the lower region of the follow-up travel target image 87a in which the control information image 88 is displayed in the front image 87 is a road surface located between the preceding vehicle to be followed up and the host vehicle 10 Since this is an area where the image appears, there is little change in the image. Therefore, the driver can easily view the control information image 88 and can instantly specify the preceding vehicle to be followed, so that the driver can feel high drivability.

  In this embodiment, in addition to the daytime when there is a large amount of sunlight including near-infrared light, the near-infrared camera 13c also uses the near-infrared camera 13c in the front area of the vehicle 10 at night and in dark places where the amount of visible light is small. Is correctly captured, and the follow-up running target image 87a can be accurately extracted from the front image 87 which is the imaging result. Therefore, even at night or in a dark place, the driver can obtain a sense of security by appropriately providing information necessary for the vehicle 10 to follow the vehicle.

(Other embodiments)
As mentioned above, although one Embodiment of this invention was described, this invention is limited to the said embodiment and is not interpreted and can be applied to various embodiment in the range which does not deviate from the summary.

  In the above embodiment, the extraction circuit 40 obtains inter-vehicle distance information indicating the distance between the preceding vehicle and the host vehicle 10 that the ACC circuit 11a is subject to following traveling, and vertical / horizontal position information about the preceding vehicle. , And is obtained from the ACC circuit 11a. On the other hand, any one of the inter-vehicle distance information and the vertical / horizontal position information may not be acquired by the extraction circuit 40. Further, the vehicle image of the follow-up traveling target image 87a may be recognized by the image recognition processing for the front image 87 without using the extraction circuit 40 for the inter-vehicle distance information and the vertical / horizontal position information.

  In the above embodiment, the extraction circuit 40 extracts changes in the vertical / horizontal position of the follow-up travel target image 87a, so that the display positions of the control information image 88 and the frame image 87b are made to follow the follow-up travel target image 87a. It was changed. Instead, the display position of the control information image 88 and the frame image 87b is changed to follow the follow-up target image 87a on the basis of the inter-vehicle distance information acquired from the ACC circuit 11 and the vertical / horizontal position information. May be. Alternatively, the display positions of the control information image 88 and the frame image 87b may not be changed by following the follow-up running target image 87a, and may be followed only in one of the vertical and horizontal directions in the front image 87. May be changed.

  In the above embodiment, the control information image 88 is displayed below the following travel target image 87a, but the display position of the control information image 88 is not limited as long as it is around the following travel target image 87a. For example, the control information image 88 may be displayed beside the follow-up running target image 87a. In the above embodiment, a rectangular image is used as the frame image 87b. However, the color and shape of the frame image 87b are not limited as long as the preceding vehicle can be emphasized. Further, the frame image 87b may not be displayed as shown in FIG.

  In the above embodiment, the near-infrared camera 13c is used as the imaging means. However, any camera that can image the front area of the host vehicle 10 may be used. For example, a far-infrared camera or a visible light camera may be used. Moreover, in the said embodiment, although the one camera 13c is used as an imaging means, you may image the front area | region of the vehicle 10 with a some camera. Furthermore, in the above-described embodiment, the ACC device 11 detects the preceding vehicle using the radar transmitters / receivers 11b and 11c that transmit and receive millimeter waves, but the radar transmitter / receiver that transmits and receives lasers. A machine may be used. In the above embodiment, the liquid crystal panel 71 is used as the display means, but a display device such as an organic EL (Electro Luminescence) or FED (Field Emission Display) may be used.

  The present invention can be applied to, for example, a HUD (Head-up Display) device capable of displaying a front image 87 on the windshield 18 (see FIG. 1) in addition to the vehicle display device functioning as a combination meter. it can.

It is a mimetic diagram showing composition of a vehicle carrying a display for vehicles by one embodiment of the present invention. It is a block diagram which shows the electric circuit structure of the display apparatus for vehicles by one Embodiment of this invention. It is a front view showing a schematic structure of a display for vehicles by one embodiment of the present invention. It is a figure which shows schematic structure of the display apparatus for vehicles by one Embodiment of this invention, Comprising: It is the IV-IV sectional view taken on the line of FIG. It is a front view which shows schematic structure of the display apparatus for vehicles by other embodiment of this invention.

Explanation of symbols

10 vehicle, 11 ACC device (travel control means), 11a ACC control device, 11b radar transmitter, 11c radar receiver, 11d operation switch, 13 night vision device, 13c near infrared camera (imaging means), 13i near infrared projector, DESCRIPTION OF SYMBOLS 15 Vehicle control apparatus, 16 Car interior ceiling, 17 Instrument panel, 17a Steering, 18 Windshield, 19 Driver's seat, 30 Image processing circuit, 40 Extraction circuit (extraction means), 50 Display control circuit (drawing means), 63 image Memory, 70 Display device (display means), 71 Liquid crystal panel, 73 Back light, 73a Light emitting diode, 73b Diffuser plate, 80 screen, 83 meter image, 83a Vehicle speed display image, 83b Water temperature display image, 83c Remaining amount display image, 83d Shift position display image, 83e background image, 85 1st pixel area, 87 front image, 87a following traveling target image, 87b frame image, 88 control information image, 88a forward vehicle icon, 88b inter-vehicle indicator, 88c set speed indicator, 89 second pixel region, 100 display device for vehicle

Claims (8)

In a vehicle that travels following a preceding vehicle according to the control of the travel control means while irradiating near infrared light forward by a near-infrared projector, a vehicle display device that displays information related to the following travel,
A front image acquired by a near-infrared camera as an imaging means for imaging a front area of the vehicle, and reflected by a front obstacle including the preceding vehicle among the near-infrared light irradiated by the near-infrared projector. Based on the control information related to the control of the travel control means, from the front image acquired by detecting the near-infrared light, the image of the preceding vehicle in which the travel control means is following the vehicle Extraction means for extracting as a follow-up target image and further extracting a change in the vertical position of the follow-up target image from the front image ;
A drawing unit for forming a control information image representing the control information by including at least one of an image indicating the inter-vehicle distance between the preceding vehicle and the vehicle and an image indicating a set speed set in the travel control unit; ,
The control information image is displayed so as to be superimposed around the following travel target image in the front image, and the control information image is made to follow the change in the vertical position of the following travel target image extracted by the extraction unit. Display means for changing the display position ;
A vehicle display device comprising: In a vehicle that travels following a preceding vehicle according to the control of the travel control means while irradiating near infrared light forward by a near-infrared projector, a vehicle display device that displays information related to the following travel,
A front image acquired by a near-infrared camera as an imaging means for imaging a front area of the vehicle, and reflected by a front obstacle including the preceding vehicle among the near-infrared light irradiated by the near-infrared projector. Based on the control information related to the control of the travel control means, from the front image acquired by detecting the near-infrared light, the image of the preceding vehicle in which the travel control means is following the vehicle Extraction means for extracting as a follow-up target image, and further extracting a change in the horizontal position of the follow-up target image from the front image;
A drawing unit for forming a control information image representing the control information by including at least one of an image indicating the inter-vehicle distance between the preceding vehicle and the vehicle and an image indicating a set speed set in the travel control unit; ,
The control information image is displayed so as to be superimposed on the periphery of the tracking target image in the front image, and the control information image is tracked in accordance with a change in the horizontal position of the tracking target image extracted by the extracting unit. Display means for changing the display position;
A vehicle display device comprising: When the front image includes a plurality of front-running vehicle images, the extraction means extracts the front-running vehicle image positioned at the lowest side of the front image as the follow-up travel target image. The vehicle display device according to claim 1 or 2. The extraction means extracts the follow-up travel target image based on inter-vehicle distance information representing a distance between the preceding vehicle and the vehicle, which is the target of the follow-up travel by the travel control means, in the control information. The vehicular display device according to any one of claims 1 to 3. The extraction means extracts the follow-up travel target image based on vertical position information representing a relative position in a vertical direction with respect to the vehicle with respect to the preceding vehicle that is the target of the follow-up travel by the travel control means. The vehicular display device according to claim 1, wherein the vehicular display device is a vehicular display device. The extraction means is based on horizontal position information representing a relative position in the horizontal direction with respect to the vehicle of the preceding vehicle that the traveling control means is subject to following traveling of the control information.
The vehicle display device according to claim 4, wherein the follow-up running target image is extracted. The vehicle display according to any one of claims 1 to 6 , wherein the display unit displays the control information image so as to be superimposed on a lower side of the follow-up travel target image in the front image. apparatus. The display means displays a frame image for emphasizing the preceding vehicle that the traveling control unit is subject to following traveling along an outer periphery of the following traveling target image in the front image. The display apparatus for vehicles as described in any one of 1-7 .

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