JP5699706B2 - In-vehicle display device - Google Patents

Description

  The present invention relates to a vehicle-mounted display device that displays an image on a windshield, rear glass, or the like in a vehicle.

  Patent Document 1 includes a plurality of semiconductor lasers, a projector that scans light beams from the respective semiconductor lasers and projects an image, and assists driving such as an image of the surroundings of the vehicle captured by a camera, vehicle speed, and engine speed ( Assist) A vehicle-mounted display device that displays an image of information or the like in a vehicle is described. In this in-vehicle display device, a projector is moved along a rail provided on the ceiling, or a plurality of projections such as a windshield and a rear glass are driven by driving a lens system that projects light from a projector fixed to the ceiling. An image is projected on the location.

JP 2009-298201 A

  In the in-vehicle display device described in Patent Document 1, a complicated and large moving mechanism is required in the case of moving the position of the projector in the vehicle in accordance with the change of the projected position of the image. In the case of driving the projection lens while fixing the projector, there is a problem that the change range of the projected portion of the image is not so wide.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an in-vehicle display device capable of changing a projection position of an image by a projector to a wide range by a small and simple mechanism. To do.

An in-vehicle display device according to the present invention is an in-vehicle display device that includes a plurality of semiconductor lasers that emit light beams of different colors, and includes a projector that projects the image by scanning the light beams from the semiconductor lasers, Each of the plurality of semiconductor lasers emits one of three color beam lights, a posture changing mechanism for changing the posture of the projector, a posture control means for driving and controlling the posture changing mechanism , a windshield, and a rear glass. And a translucent screen provided on any one of the side glasses, and image reversing means for reversing the image projected from the projector on the screen, the screen being a vehicle of the windshield, rear glass, and side glass. Is provided at the end on the side close to the power supply part in the glass located on the side close to the power supply part to be fed from outside Serial image is characterized by image der Rukoto indicating information relating to the power supply to the power source.

In the present invention, the posture of the projector that projects the image by scanning the light beams from the plurality of semiconductor lasers each emitting one of the three color light beams is changed by driving and controlling the posture changing mechanism, The projection location of the image by the projector is changed. In addition, the image projected from the projector is reversed in the forward and reverse directions when displaying an image viewed inside the vehicle and when displaying an image viewed from outside the vehicle on a translucent screen provided on any of the windshield, rear glass, and side glass. Project. Thereby, in addition to the image seen in the car, the image projected by the projector installed in the car can be projected as an easy-to-see image from outside the car. Furthermore, when power is supplied to the power supply unit from the outside, the image from the projector is projected on the glass located on the side closer to the power supply unit among the windshield, rear glass, and side glass, and the image can be viewed from outside the vehicle. it can. In this case, the power supply operation can be smoothly performed by displaying information desired to be known at the time of power supply.

An in-vehicle display device according to the present invention includes a moving mechanism that moves a position of the projector, and a position control unit that drives and controls the moving mechanism.
In the present invention, the movement mechanism for moving the position of the projector is driven and controlled, and the position of the image is changed in addition to the change in the attitude of the projector, so that the change of the projected position of the image is made in a wider range.

The on-vehicle display device according to the present invention is characterized in that the posture changing mechanism has a holding portion for holding the projector, and the projector includes a held portion that is detachable from the holding portion.
In the present invention, by attaching the held portion provided in the projector to the holding portion of the posture changing mechanism, the projector is held by the posture changing mechanism and can be used as an in-vehicle projector. By detaching the held portion included in the projector from the holding portion of the posture changing mechanism, the projector is separated from the posture changing mechanism and can be used alone. This projector is provided with a three-color semiconductor laser as a light source and is small in size, so it is convenient for transportation and use.

  According to the present invention, there is provided an in-vehicle display device capable of changing a projection position of an image by a projector to a wide range by driving and controlling a small and simple attitude changing mechanism for changing the attitude of the projector. .

It is a side view which shows typically the motor vehicle carrying the vehicle-mounted display apparatus which concerns on this invention. It is a side view of the ceiling part of the motor vehicle which shows Embodiment 1 of the vehicle-mounted display apparatus which concerns on this invention. It is a figure which shows the outline | summary of the optical system of the projector with which the vehicle-mounted display apparatus which concerns on this invention is equipped. It is a figure of the windshield which shows the projection location from a projector. It is a figure of the rear glass which shows the projection location from a projector. It is a block diagram of the control structure of the vehicle-mounted display apparatus which concerns on this invention. It is a figure which shows an example of a display image. It is a side view of the ceiling part of the motor vehicle which shows Embodiment 2 of the vehicle-mounted display apparatus which concerns on this invention. It is a block diagram of the control structure of the vehicle-mounted display apparatus shown in FIG.

Hereinafter, embodiments of an in-vehicle display device according to the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
1 is a side view schematically showing an automobile equipped with an in-vehicle display device according to the present invention, FIG. 2 is a side view of a ceiling portion of the automobile showing Embodiment 1 of the in-vehicle display device according to the present invention, and FIG. FIG. 4 is a diagram showing an outline of an optical system of a projector provided in an in-vehicle display device according to the present invention, FIG. 4 is a diagram of a windshield showing a projection location from the projector, and FIG. 5 is a diagram of a rear glass showing a projection location from the projector. In this embodiment, an electric vehicle or a plug-in hybrid vehicle will be described as an example.

  The vehicle body 1 includes side cameras 2 that capture images of the rear on the left and right sides of the front side. A projector 5 is suspended and supported via a posture changing mechanism 4 on a ceiling 3 at a substantially central position on the left and right and front and rear in the vehicle. A side camera 8 for imaging the rear is provided on the rear side in the vehicle. The side cameras 2 and 8 are color video cameras. On the rear side surface of the vehicle body 1, a power supply port 9 for supplying power to a secondary battery provided in the vehicle body from the outside is provided.

  The posture changing mechanism 4 includes a receiving portion 4C attached to the ceiling 3, a rectangular parallelepiped rotating portion 4A that is rotatably held around a longitudinal axis Y on a columnar portion extending below the receiving portion 4C, and a rotating portion. An inclined portion 4B that rotates about the horizontal axis X with respect to 4A and can be inclined is provided. The inclined portion 4B has left and right side plates 4B2 and a bottom plate 4B1, and has a substantially U-shape when viewed from the front. The rotating portion 4A has a built-in swing motor 18 and the inclined portion 4B has a built-in tilt motor 19. FIG. 2 shows a state where the inclined portion 4B is inclined by a two-dot chain line.

  A through hole 4B1a is formed in the bottom plate 4B1 of the inclined portion 4B. The projector 5 has a screw hole 5a on the upper surface. The projector 5 is fixed to the lower side of the inclined portion 4B by screwing the set screw 7 passed through the through hole 4B1a of the bottom plate 4B1 from above into the upper screw hole 5a of the projector 5. When the set screw 7 is loosened, the projector 5 is detached from the inclined portion 4B, so that the projector 5 can be taken out of the vehicle and used as a projector alone.

  The projector 5 includes a semiconductor laser 10a that emits red beam light, a semiconductor laser 10b that emits green beam light, and a semiconductor laser 10c that emits blue beam light. The beam light from each of the semiconductor lasers 10a, 10b, and 10c is coaxially aligned by the half mirrors 11a and 11b, and then changed in angle so as to be scanned two-dimensionally by the scanning mirror 12, and projected to the outside.

  On the windshield 13, a horizontally long translucent screen 13a is attached to the lower front part of the driver's seat, and vertically long translucent screens 13b and 13c are attached to both left and right ends. The rear glass 14 has a vertically long translucent screen 14a attached to an end portion on the side close to the power supply port 9, and a horizontally long semitransparent screen 14b attached to the upper left and right centers.

  Next, the control configuration of the in-vehicle display device according to the present invention will be described. FIG. 6 is a block diagram of the control configuration of the in-vehicle display device according to the present invention.

  A control unit 15 in which a microcomputer including a calculation unit, a storage unit, an input / output unit and the like is incorporated is provided. Imaging signals from the side cameras 2 and 8 and a detection signal from the power supply port sensor 9 a that detects opening and closing of the cover of the power supply port 9 are input to the control unit 15. In addition, a detection signal of the turn signal switch 16 that detects lighting signals of the left and right turn signal lamps, and a detection signal of the back switch 17 that detects that the shift lever is operated in the back (reverse) are input to the control unit 15. Yes. Although not shown, various detection information such as the traveling speed, the engine speed, and the shift lever position are input to the control unit 15 and stored in the storage unit.

  From the control unit 15, drive signals for driving the semiconductor lasers 10 a, 10 b, 10 c, control signals for the mirror drive unit 12 a for driving the scanning mirror 12, and oscillations provided in the rotation unit 4 A of the attitude changing mechanism 4. A rotation drive signal for the motor 18 and a tilt drive signal for the tilt motor 19 provided in the tilt portion 4B of the posture changing mechanism 4 are output.

Next, the control operation of the control unit 15 and the projection image by the projector 5 will be described.
During forward traveling, the control unit 15 drives the swing motor 18 to turn the projector 5 to the right with respect to the traveling direction, drives the tilt motor 19 to turn the projector 5 downward, and the windshield 13 Assist information that can be confirmed by the driver is displayed on the lower screen 13a. For example, information such as travel speed, engine speed, shift lever position, and the like is displayed as assist information during forward travel. In this case, the colors of the three semiconductor lasers 10a, 10b, and 10c are selectively used to display each information as a single color (red, blue, or green) image.

  When making a left turn, based on the detection signal of the turn signal switch 16 indicating a left turn, the control unit 15 drives the swing motor 18 to turn the projector 5 leftward with respect to the traveling direction, and the left end screen 13b of the windshield 13 Assist information that is easy for the driver facing left to check is displayed. As assist information at the time of left turn, a captured image of the side camera 2 that captures the situation (dead angle) on the left side of the vehicle body that cannot be seen with the left side mirror (door mirror) is displayed. In this case, the three semiconductor lasers 10a, 10b, and 10c are driven to display a color image.

  Similarly, at the time of a right turn, based on the detection signal of the turn signal switch 16 indicating a right turn, the control unit 15 drives the swing motor 18 to turn the projector 5 to the right with respect to the traveling direction. Assist information that is easy for a driver who turns to the right to check is displayed on the front screen 13c. As assist information at the time of turning right, a captured image of the side camera 2 on the right side of the vehicle body that captures the situation on the right side of the vehicle body that cannot be seen with the right side mirror (door mirror) is displayed. In this case, the three semiconductor lasers 10a, 10b, and 10c are driven to display a color image.

  At the time of the back operation, based on the detection signal of the back switch 17 indicating the switching of the shift lever to the back, the control unit 15 drives the swing motor 18 to turn the projector 5 backward with respect to the traveling direction. A captured image of the camera 8 on the rear side of the vehicle body that captures a situation (dead angle) behind the vehicle body that is difficult to be seen by the driver is displayed on the screen 14b on the upper part of the rear glass 14 as assist information that can be easily confirmed by the driver facing the rear side. In this case, the three semiconductor lasers 10a, 10b, and 10c are driven to display a color image.

  At the time of power supply, based on the detection signal of the detection signal of the power supply port sensor 9a, the control unit 15 drives the swing motor 18 so that the projector 5 faces left rearward with respect to the traveling direction, and the screen 14a of the rear glass 14 The assist information at the time of feeding is displayed. FIG. 7 is a diagram illustrating an example of a display image, as viewed from outside the vehicle. As assist information at the time of power feeding, a remaining battery level, a charging end time, a charging fee (billing information), and the like are displayed. In this case, the colors of the three semiconductor lasers 10a, 10b, and 10c are selectively used to display each information as a single color (red, blue, or green) image. Moreover, since the image displayed on the screen 14a of the rear glass 14 is an image obtained by inverting the left and right, unlike the image when checking from the inside of the vehicle, it can be easily checked from the outside of the vehicle. Although not shown, the control unit 15 has a built-in clock, stores a billing table for calculating the charge, and receives various detection information such as the remaining battery level and the charging speed. Is remembered.

(Embodiment 2)
FIG. 8 is a side view of a ceiling portion of an automobile showing Embodiment 2 of the in-vehicle display device according to the present invention, and FIG. 9 is a block diagram of a control configuration of the in-vehicle display device shown in FIG.

  In the second embodiment, a rail 20 is installed along the front-rear direction on the ceiling 3 at the left and right center in the vehicle, and a movable table 6 supported movably on the rail 20 is provided instead of the receiving portion 4C. The configuration is the same as that of the first embodiment except that 6 has a built-in moving motor 21. A driving signal is output from the control unit 15 to the moving motor 21. The moving table 6 constitutes a posture changing mechanism and a moving mechanism.

Next, the control operation of the control unit 15 in the second embodiment will be described.
When traveling forward, the control unit 15 drives the moving motor 21 to move the moving table 6 to the front side of the vehicle, drives the swing motor 18 to turn the projector 5 to the right with respect to the traveling direction, and tilts the motor. 19 is driven to turn the projector 5 downward, and assist information for forward traveling is displayed on the screen 13a below the windshield 13.

  At the time of a left turn, based on the detection signal of the turn signal switch 16 indicating a left turn, the control unit 15 drives the swing motor 18 to change the direction of the projector 5 with respect to the traveling direction in a state where the moving base 6 has moved to the front side in the vehicle. The left turn screen 13b displays the assist information for the left turn. Similarly, at the time of a right turn, based on the detection signal of the turn signal switch 16 indicating a right turn, the control unit 15 drives the swing motor 18 and advances the direction of the projector 5 in a state where the moving base 6 has moved to the front side in the vehicle. Assist information for turning right is displayed on the right end screen 13c of the windshield 13 so as to face rightward.

  At the time of the back operation, the control unit 15 drives the moving motor 21 to move the moving table 6 to the rear side in the vehicle based on the detection signal of the back switch 17 indicating the switching of the shift lever to the back, and the swing motor 18 is driven to turn the projector 5 backward with respect to the traveling direction, and the assist information for the back operation is displayed on the screen 14 b of the rear glass 14.

  At the time of power feeding, based on the detection signal of the detection signal of the power feeding port sensor 9a, the control unit 15 drives the moving motor 21 to move the moving table 6 to the rear side in the vehicle, and drives the swing motor 18 to drive the projector. 5 is set to the left rear direction with respect to the traveling direction, and the assist information at the time of power feeding is displayed on the screen 14a of the rear glass 14.

Next, another embodiment of the in-vehicle display device according to the present invention will be described.
(1) An infrared camera that images the front side and the surroundings in the traveling direction is provided, and an image from the infrared camera is displayed on the screen 13a below the windshield 13 in conjunction with the lighting of the headlight. Assist information for safe driving when night vision is poor.
(2) A lens that disperses the light of the semiconductor lasers 10a, 10b, and 10c projected from the projector 5 is provided, and the semiconductor lasers 10a, 10b, and 10c are driven in conjunction with the opening of the door when stopped to be used as an interior lamp.
(3) When illegal entry into the vehicle without using a key switch is confirmed, the semiconductor lasers 10a, 10b, and 10c are driven on and off to generate flash light, which is used as a security light.

  In the above embodiment, an example in which the in-vehicle display device according to the present invention is mounted on an electric vehicle or a plug-in hybrid vehicle has been described, but the present invention can also be applied to a vehicle such as a gasoline engine or a diesel engine.

4 Posture change mechanism 4B1a Through hole (holding part)
5 Projector 5a Screw hole (held part)
6 Moving platform (posture changing mechanism, moving mechanism)
7 Set screw (holding part)
10a semiconductor laser 10b semiconductor laser 10c semiconductor laser 13 windshield 13a screen 13b screen 13c screen 14 rear glass 14a screen 15 control unit (attitude control means)
15 Control unit (position control means)

Claims (3)

An in-vehicle display device having a plurality of semiconductor lasers that emit light beams of different colors and provided with a projector that scans the light beams from the semiconductor lasers and projects an image,
Each of the plurality of semiconductor lasers emits one of three color light beams,
An attitude changing mechanism for changing the attitude of the projector;
Attitude control means for driving and controlling the attitude change mechanism ;
A translucent screen provided on any of the front glass, rear glass and side glass;
Image reversing means for reversing the image projected from the projector on the screen .
The screen is provided at an end of the windshield, the rear glass, and the side glass that is close to the power feeding portion in the glass that is located near the power feeding portion that feeds power to the vehicle from the outside.
The image-vehicle display device comprising image der Rukoto indicating information relating to the power supply to the power source. A moving mechanism for moving the position of the projector;
Vehicle display device according to claim 1, wherein the obtaining Bei and position control means for driving and controlling said moving mechanism. The posture changing mechanism has a holding unit for holding the projector,
The projector-vehicle display device according to claim 1 or 2, characterized in that to obtain Bei the held portion of detachably to the holding portion.

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