JP4285229B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a vehicle display device.

Conventionally, a road condition display device has been proposed that captures the traveling direction of the host vehicle and displays the captured image on the rear surface of the host vehicle, thereby supplementing the forward view that is blocked by the presence of the host vehicle for the occupant of the rear vehicle. (For example, refer to Patent Document 1). According to the road condition display device disclosed in Patent Document 1, for example, a captured image in the traveling direction of the host vehicle is projected, and the projected image is reflected by a mirror on a screen provided on the rear surface of the host vehicle. Thus, an image of the traveling direction of the host vehicle is provided to the rear vehicle.
JP-A-9-58365

  Although the above-described conventional road condition display device can compensate for the forward view of the occupant of the rear vehicle, it cannot compensate for the rear view of the occupant of the own vehicle that is blocked by the screen on the rear surface of the own vehicle.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a display device for a vehicle that can supplement the front view of the occupant of the rear vehicle and the rear view of the occupant of the host vehicle.

  According to a first aspect of the present invention, there is provided a display device for a vehicle having a display area in a rear window of the host vehicle, and display means for displaying an image displayed in the display area from outside and inside the host vehicle. A front imaging unit that captures a front image; a rear imaging unit that captures an image behind the host vehicle; and a projection unit that projects an image captured by the front imaging unit or the rear imaging unit onto a display area of the display unit. , A shift position detection means for detecting the shift position of the host vehicle, and an image captured by the front imaging means or the rear imaging means to be projected on the display area of the display means according to the shift position detected by the shift position detection means And a control means for performing control for switching between the two.

  In this way, the rear window has a display area for displaying an image of the front or the rear of the host vehicle, and the display means for displaying the image displayed in the display area from outside the vehicle interior of the host vehicle. In addition, by switching the image projected on the display area according to the shift position of the host vehicle, an image in front of the host vehicle can be provided to the occupant of the rear vehicle. Thus, an image behind the host vehicle can be provided.

  According to the vehicle display device of the second aspect, the display means is capable of allowing an occupant of the own vehicle to visually recognize an image to be displayed in the display area so as to overlap a scenery around the own vehicle. To do.

  For example, by providing a display area of a well-known head-up display (hereinafter referred to as “HUD”) on the rear window, an occupant of the own vehicle can visually recognize the image displayed on the HUD superimposed on the scenery around the own vehicle. it can. As a result, it is possible to visually recognize an area that is not displayed as an image together with the image.

  According to the vehicle display device of the third aspect, when the shift position when the host vehicle is moved backward is detected by the shift position detection means, the control means displays the image captured by the rear imaging means on the display means. When the shift position detecting unit detects the shift position when the host vehicle moves forward, the image captured by the front image capturing unit is projected as the image to be projected on the display region of the display unit. It is characterized by performing switching control.

  Thereby, when the host vehicle moves forward, by displaying an image in front of the host vehicle in the display area, it is possible to supplement the front view of the occupant of the rear vehicle, and when the host vehicle moves backward, The rear view of the occupant of the own vehicle can be supplemented.

  According to the vehicle display device of the fourth aspect, the display area of the display means is divided into upper and lower display areas, and the projection means detects the shift position when the host vehicle is moved backward by the shift position detection means. In this case, the image captured by the rear imaging means is projected onto a display area below the display means. Thereby, the visibility of the area | region which is not displayed as an image can be improved.

  According to the vehicle display device of the fifth aspect, the display area of the display means is provided on the vehicle interior side of the host vehicle, and the projection means inverts the image captured by the front imaging means to the left and right, Projecting to the display area of the display means. Thereby, the image ahead of the own vehicle can be accurately provided to the occupant of the rear vehicle.

  The display device for a vehicle according to claim 6 includes a display device at the time of forward gazing having a display screen at a position in the passenger compartment of the own vehicle that can be viewed by an occupant of the own vehicle while gazing at the front of the own vehicle. The control means performs control to display an image captured by the rear imaging means on the display screen of the front gazing display means when the shift position when the vehicle is moved forward is detected by the shift position detection means. And

  When displaying the front image of the host vehicle in the display area in order to supplement the front view of the occupant of the rear vehicle, for example, even when the above-described HUD is employed, the visibility behind the host vehicle is reduced. There is. Therefore, when displaying an image in front of the host vehicle, for example, the host vehicle moves forward by displaying an image behind the host vehicle on a front-gaze display means having a display screen near the center console of the host vehicle. This can supplement the rear view of the occupant.

  The vehicle display device according to claim 7 is a display unit having a display area in a rear window of the host vehicle, a rear imaging unit that captures an image behind the host vehicle, and a shift position that detects a shift position of the host vehicle. When the shift position when the host vehicle is moved backward is detected by the detection means and the shift position detection means, a projection means for projecting an image captured by the rear imaging means onto the display area is provided. To do.

  2. Description of the Related Art Conventionally, when a host vehicle is moved backward, a so-called back monitor has been proposed in which an image behind the host vehicle is displayed on, for example, a display device disposed in the vicinity of a center console to supplement the rear view of the passenger of the host vehicle. However, when the host vehicle is moved backward, it is common for the driver of the host vehicle to perform a driving operation with the face facing the back of the host vehicle in order to confirm the presence of an object approaching from the surroundings of the host vehicle. .

  Therefore, it is not possible to perform a driving operation by looking only at the image displayed on the back monitor arranged at a position where the passenger of the own vehicle such as the center console can view while gazing at the front of the own vehicle. This is rarely done because an object approaching from the surroundings cannot be confirmed early.

  Therefore, as in the present invention, when the host vehicle moves backward, an image behind the host vehicle is displayed on the rear window, so that the passenger of the host vehicle can display the side window of the host vehicle along with the image displayed on the rear window. It is possible to confirm an object approaching from the surroundings of the host vehicle via the above.

  According to the vehicle display device of the eighth aspect, the display means is capable of allowing an occupant of the own vehicle to visually recognize an image to be displayed in the display area so as to overlap with a scenery around the own vehicle. To do. Thereby, the area | region which is not displayed as an image can be visually recognized with an image.

  According to the vehicle display device of the ninth aspect, the display area of the display means is provided below the rear window. Thereby, the visibility of the area | region which is not displayed as an image can be improved.

  Hereinafter, the display device for vehicles of the present invention is explained using a drawing. In addition, this invention is not limited to this embodiment at all, and can take various forms as long as it belongs to the technical scope of this invention.

  FIG. 1 is a schematic diagram illustrating an overall configuration of a vehicle display device 100 according to the present embodiment. As shown in the figure, the vehicle display device 100 includes a rear windshield 101, a front camera 102, a rear camera 103, a projector 104, a shift position sensor 105, and a control device 106.

  The rear windshield 101 is a rear window of the vehicle, and a surface treatment serving as a combiner is applied to the surface on the passenger compartment side. The area subjected to the surface treatment is set as a display area for projecting display light output from the projector 104. That is, a well-known HUD display area is set on the rear windshield 101, and a passenger seated in a driver's seat in the passenger compartment is displayed on the display area by display light output from the projector 104. Can be seen on the actual scenery behind the host vehicle. In addition, the image displayed in the display area of the rear windshield 101 is visible from outside the passenger compartment of the host vehicle.

  The front camera 102 is an optical camera that is used as a forward imaging unit that captures the front of the host vehicle, and is used to capture images of roads in front of the host vehicle and other vehicles existing on the road. In addition, the front camera 102 may be arrange | positioned outside the compartment of the own vehicle, and may be arrange | positioned in the vehicle interior which does not disturb the passenger | crew's field of view of the own vehicle.

  The rear camera 103 is an optical camera used as a rear imaging means for photographing the rear of the host vehicle. The rear camera 103 may be disposed outside the passenger compartment of the host vehicle, or may be disposed in the passenger compartment without obstructing the rear view of the passenger of the host vehicle.

  The front camera 102 and the rear camera 103 are configured such that the shutter speed, frame rate, zoom, focus, etc. at the time of shooting can be adjusted in accordance with instructions from the control device 106. An image signal including a vertical synchronization signal and a pixel value indicating the brightness of each pixel of the image is output to the control device 106.

  The projector 104 acquires the image data output from the control device 106 and projects an image based on the acquired image data onto the display area of the rear windshield 101. The projector 104 has a built-in mirror for displaying the image projected on the display area of the rear windshield 101 by reversing left and right. The image is projected onto the mirror and the reflected image is displayed on the rear window. By projecting onto the display area of the shield 101, a horizontally inverted image is displayed in the display area.

  The projector 104 projects the horizontally reversed image when the instruction data for giving an instruction to project the horizontally reversed image is given to the image data from the control device 106.

  The shift position sensor 105 is a sensor that detects the shift position of the host vehicle, and a detection signal of the shift position sensor 105 is output to the control device 106.

  The control device 106 receives image signals output from the front camera 102 and the rear camera 103, and outputs an image to be output to the projector 104 (ie, the front) according to the detection result of the shift position from the shift position sensor 105. The image data taken by the camera 102 or the rear camera 103 is switched, and the image data is output to the projector 104.

  FIG. 2 shows a block diagram of the internal configuration of the control device 106. As shown in the figure, the control device 106 includes a CPU 301, a ROM 302, a RAM 303, an input / output unit 304, a drawing RAM 306, and a display controller 307.

  The CPU 301, the ROM 302, the RAM 303, and the drawing RAM 306 are configured by a known processor and memory module. The CPU 301 uses the RAM 303 as a temporary storage area for temporarily storing data, and various types based on programs stored in the ROM 302. Execute the process. The drawing RAM 306 stores image data output to the projector 104.

  The input / output unit 304 functions as an interface that inputs signals from the front camera 102, the rear camera 103, and the shift position sensor 105 and outputs the signals to the CPU 301, the RAM 303, the drawing RAM 306, and the display controller 307.

  The control device 106 grasps the current shift position of the host vehicle based on a signal from the shift position sensor 105, and if the shift position is a shift position selected when the host vehicle is moved backward, the rear camera 103 The image data of the photographed image is output to the projector 104. On the other hand, when the current shift position of the host vehicle is a shift position selected when the host vehicle is advanced, the image data of the image taken by the front camera 102 and the display area of the rear windshield 101 are displayed. Instruction data for reversing the image to be projected is output to the projector 104.

  The projector 104 acquires image data from the control device 106 and projects an image based on the acquired image data onto the display area of the rear windshield 101. When instruction data is attached to the image data, a horizontally reversed image is projected.

  Next, processing of the vehicle display device 100 relating to the characteristic part of the present embodiment will be described with reference to the flowchart shown in FIG. First, in step (hereinafter referred to as S) 10 shown in FIG. 3, images taken by the front camera 102 and the rear camera 103 are acquired. In S20, the shift position of the host vehicle is detected.

  In S30, it is determined whether or not the shift position of the host vehicle detected in S20 is a shift position selected when the host vehicle is advanced. If the determination is affirmative, the process proceeds to S40. If the determination is negative, the process proceeds to S60.

  In S <b> 40, the image data of the image captured by the front camera 102 and the instruction data for instructing the projection after the image to be projected by the projector 104 are reversed to the left and right are output to the projector 104.

  In S <b> 50, the projector 104 projects an image based on the image data onto the built-in mirror, and projects the reflected image onto the display area of the rear windshield 101. In this way, when the host vehicle moves forward, as shown in FIG. 4A, an image in front of the host vehicle is displayed in the display area of the rear windshield 101, so that the front view of the occupant of the rear vehicle is displayed. Can be supplemented. Further, even if a display area is provided on the vehicle interior side of the host vehicle, the image projected on the display area is horizontally inverted and projected, so that an image in front of the host vehicle can be accurately displayed to the occupant of the rear vehicle. Can be provided.

  In S60, it is determined whether or not the shift position of the host vehicle detected in S20 is a shift position selected when the host vehicle is moved backward. If the determination is affirmative, the process proceeds to S70. If the determination is negative, the process proceeds to S10, and the above-described process is repeatedly executed.

  In S <b> 70, image data of an image captured by the rear camera 103 is output to the projector 104. In S 80, the projector 104 projects an image based on the image data onto the display area of the rear windshield 101. In this way, when the host vehicle moves backward, as shown in FIG. 4B, an image of the rear of the host vehicle is displayed in the display area of the rear windshield 101, so that the rear view of the passenger of the host vehicle is displayed. Can be supplemented.

  As described above, the vehicle display device 100 according to the present embodiment has a display area for displaying a front or rear image of the host vehicle on the rear window, and the image displayed in the display area is the host vehicle. Display means that can be viewed from inside and outside the vehicle interior, and by switching the image projected on the display area according to the shift position of the host vehicle, the shift position that is selected when the shift position of the host vehicle advances In some cases, an image of the front of the host vehicle can be provided to the occupant of the rear vehicle, and if the shift position of the host vehicle is a shift position selected when the host vehicle moves backward, the occupant of the host vehicle In contrast, an image behind the host vehicle can be provided.

(Modification 1)
The vehicle display device 100 in the present embodiment displays an image captured by the front camera 102 or the rear camera 103 in a display area provided in the rear windshield 101 of the host vehicle. For example, the display area When the shift position when the vehicle is moved backward is detected, the image captured by the rear camera 103 may be projected onto the lower display area. Thereby, the visibility of the passenger | crew of the own vehicle with respect to the area | region which is not displayed as an image can be improved.

(Modification 2)
In the vehicle display device 100 according to the present embodiment, when the shift position of the host vehicle is a shift position selected when the host vehicle moves forward, the image captured by the front camera 102 is displayed in the display area of the rear windshield 101. Even if a HUD that can visually recognize the display image projected on the display area superimposed on the actual scenery behind the host vehicle is used, the visibility may be reduced.

  Therefore, when an image in front of the host vehicle is displayed in the display area of the rear windshield 101, as shown in FIG. 5, for example, an occupant of the host vehicle near the center console is watching the front of the host vehicle. A display device 106 having a display screen is provided at a position where it can be visually recognized, and an image behind the host vehicle taken by the rear camera 103 is displayed on the display device 106. Thereby, while being able to supplement the front view of the passenger | crew of the back vehicle when the own vehicle moves forward, the back view of the passenger | crew of the own vehicle can be supplemented.

(Modification 3)
The vehicle display device 100 according to the present embodiment switches an image to be projected on a display area provided on the rear windshield 101 according to a shift position of the host vehicle, and detects a shift position when the host vehicle is moved backward. Only in such a case, an image captured by the rear camera 103 may be displayed in a display area provided in the rear windshield 101.

  That is, conventionally, when the host vehicle is moved backward, a so-called back monitor is proposed that supplements the rear view of the occupant of the host vehicle by displaying a rear image of the host vehicle on a display device disposed near the center console, for example. However, when reversing the host vehicle, the driver of the host vehicle generally performs a driving operation with his face facing the back of the host vehicle in order to confirm the presence of an object approaching from the surroundings of the host vehicle. It is.

  Therefore, as in the prior art, the driving operation is performed by looking only at the image displayed on the back monitor arranged at a position where the passenger of the own vehicle, such as near the center console, can view the vehicle while gazing at the front of the own vehicle. Is rarely performed because an object approaching from the surroundings of the host vehicle cannot be confirmed at an early stage.

  Therefore, as in this modification, when the host vehicle moves backward, the rear windshield 101 displays an image behind the host vehicle so that the passenger of the host vehicle can display an image displayed on the rear windshield 101, An object approaching from the periphery of the host vehicle can be confirmed through the side window of the host vehicle.

  Note that, also in the present modified example, as in the first modified example, when the shift position when the display area of the rear windshield 101 is divided into upper and lower parts and the host vehicle is moved backward is detected, You may make it project the image to image | photograph on the lower display area. Thereby, the visibility of the passenger | crew of the own vehicle with respect to the area | region which is not displayed as an image can be improved.

1 is a schematic diagram showing an overall configuration of a vehicle display device 100 according to an embodiment of the present invention. It is a block diagram which shows the internal structure of the control apparatus 106 concerning embodiment of this invention. It is a flowchart which shows the flow of a process of the display apparatus 100 for vehicles concerning embodiment of this invention. (A) is a figure which shows the example in the case of displaying the image ahead of the own vehicle in the display area of the rear windshield 101, (b) is a display area of the rear windshield 101 in the rear image of the own vehicle. It is a figure which shows the example in the case of displaying on. It is a schematic diagram which shows the whole structure of the display apparatus 100 for vehicles concerning the modification 2 of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Display apparatus for vehicles 101 Rear windshield 102 Front camera 103 Rear camera 104 Projector 105 Shift position sensor 106 Control apparatus

Claims (9)

Display means having a display area in a rear window of the host vehicle, and an image displayed in the display area being visible from inside and outside the interior of the host vehicle;
Forward imaging means for capturing an image in front of the host vehicle;
A rear imaging means for capturing an image behind the host vehicle;
A projection unit that projects an image captured by the front imaging unit or the rear imaging unit onto a display area of the display unit;
Shift position detecting means for detecting the shift position of the host vehicle;
Control means for performing control to switch the image captured by the front imaging means or the rear imaging means to be projected on the display area of the display means in accordance with the speed change position detected by the speed change position detection means. A display device for vehicles.   The vehicle display device according to claim 1, wherein the display unit is configured to allow an occupant of the host vehicle to visually recognize an image to be displayed in the display area so as to overlap a landscape around the host vehicle. . The control means includes
When the shift position is detected by the shift position detecting means when the host vehicle is moved backward, the image captured by the rear imaging means is switched as an image to be projected on the display area of the display means,
When the shift position detecting means detects a shift position when the host vehicle moves forward, control is performed to switch an image captured by the front imaging means as an image to be projected on the display area of the display means. The vehicle display device according to claim 1, wherein the display device is a vehicle display device. The display area of the display means is divided into upper and lower display areas,
The projection unit projects an image captured by the rear imaging unit onto a display area below the display unit when the shift position detection unit detects a shift position when the host vehicle is moved backward. 4. The vehicle display device according to claim 3, wherein The display area of the display means is provided on the vehicle interior side of the host vehicle,
5. The vehicle according to claim 1, wherein the projection unit projects the image captured by the front imaging unit to the left and right and then projects the image on a display area of the display unit. Display device. A forward gazing display means having a display screen at a position in the passenger compartment of the host vehicle, which can be viewed by an occupant of the host vehicle gazing at the front of the host vehicle,
The control unit is configured to display an image captured by the rear imaging unit on the display screen of the front gazing display unit when the transmission position when the host vehicle moves forward is detected by the transmission position detection unit. The vehicle display device according to any one of claims 1 to 5, wherein: Display means having a display area on the rear window of the host vehicle;
A rear imaging means for capturing an image behind the host vehicle;
Shift position detecting means for detecting the shift position of the host vehicle;
And a projection unit that projects an image captured by the rear imaging unit onto a display area when the shift position is detected by the shift position detection unit when the host vehicle is moved backward. Display device for a vehicle.   8. The vehicle display device according to claim 7, wherein the display means allows an occupant of the host vehicle to visually recognize an image to be displayed in the display area so as to overlap a landscape around the host vehicle. .   The vehicle display device according to claim 7 or 8, wherein the display area of the display means is provided below the rear window.

Images