WO2006049247A1 - 画像表示装置および画像表示方法 - Google Patents
画像表示装置および画像表示方法 Download PDFInfo
- Publication number
- WO2006049247A1 WO2006049247A1 PCT/JP2005/020296 JP2005020296W WO2006049247A1 WO 2006049247 A1 WO2006049247 A1 WO 2006049247A1 JP 2005020296 W JP2005020296 W JP 2005020296W WO 2006049247 A1 WO2006049247 A1 WO 2006049247A1
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- WIPO (PCT)
- Prior art keywords
- vehicle
- acceleration
- image display
- display device
- detected
- Prior art date
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
Definitions
- the present invention relates to an image display device and an image display method provided in a vehicle.
- the use of the present invention is not limited to the above-described image display device and image display method. Background art
- a detection output line was installed between the parking brake and the video equipment to detect the position of the parking brake lever.
- the video signal from the video equipment is cut off, and when the parking brake is detected to be active, or the inactive state force is also activated.
- Video signals were supplied at the timing of switching (for example, see Patent Document 1) o
- Patent Document 1 Japanese Patent Laid-Open No. 3-132444
- the detection output line In both cases, when the vehicle running state is detected by the braking state of the parking brake, or when the video signal is supplied at the timing when the parking brake switches to the non-operating state, the detection output line. Since the display of the image is controlled by the output of the force, the detection output line and the like are not properly connected, and it is determined that the vehicle is always stopped in a pseudo manner, and the image is continuously displayed even while the vehicle is running. There was a concern that it could be modified so that it could be used as a safety measure for users.
- the present invention can erase the display of an image while the vehicle is running even when an image is displayed by deliberate modification. It is another object of the present invention to provide an image display method.
- An image display device is provided in a vehicle, and the vehicle is in a stopped state.
- An image display device that displays an image at the time of the acceleration, and is included in the image display device and detects acceleration of the vehicle, and the acceleration detected by the acceleration detection device exceeds a predetermined value. And determining means for determining that the vehicle is in a running state.
- the image display method according to the invention of claim 7 is an image display method of an image display device that is provided in a vehicle and displays an image when the vehicle is in a stopped state.
- An apparatus includes: an acceleration detection step of detecting acceleration of the vehicle; and a determination step of determining that the vehicle is in a running state when the acceleration detected by the acceleration detection step exceeds a predetermined value. It is characterized by that.
- FIG. 1 is a block diagram showing a functional configuration of an image display apparatus that is useful in an embodiment of the present invention.
- FIG. 2 is a flow chart showing processing of an image display method which is useful for an embodiment of the present invention.
- FIG. 3 is a perspective view showing the arrangement of each component in the image display apparatus of this embodiment.
- FIG. 4 is a block diagram showing an example of a hardware configuration of an image display apparatus that is useful in an embodiment of the present invention.
- FIG. 5 is a block diagram showing a functional configuration of the image display apparatus of this embodiment.
- FIG. 6 is a flowchart showing processing of the image display apparatus of this embodiment.
- FIG. 7 is an explanatory diagram showing the relationship between vehicle acceleration and running state determination.
- FIG. 1 is a block diagram showing a functional configuration of an image display device that is useful for an embodiment of the present invention.
- An image display device 100 that is useful in this embodiment includes an acceleration detection unit 101, a brake detection unit 102, a determination unit 103, a display control unit 104, and a display unit 105.
- the acceleration detection unit 101 is built in the image display device 100 and detects the acceleration of the vehicle equipped with the image display device 100.
- Vehicles are described here mainly using ordinary automobiles as examples, but include vehicles for transporting passengers such as trains, trains, and cars.
- the image display device 100 may be a playback device that plays back a DVD image, and is described assuming a car navigation system. Also, a television set that displays received video signals. It can also be.
- Acceleration is the rate of change of speed.
- the vehicle speed does not change.
- the acceleration is positive, the vehicle speed increases.
- the acceleration is negative, the vehicle speed decreases.
- the vehicle starts running the speed changes from 0 to a positive state, so the acceleration is positive at this time.
- the state force with a positive speed also decreases to zero, so the acceleration becomes negative.
- the brake detection unit 102 detects a braking operation of a parking brake of the vehicle provided in the vehicle.
- the driver can stop the vehicle by braking the vehicle with the parking brake.
- Determination unit 103 determines that the vehicle is running when the output of acceleration detection unit 101 exceeds a predetermined value. State force when the vehicle is stopped If acceleration becomes positive, it can be considered that the vehicle has started running, but it is not actually accelerating, and it is detected. May be in a wrong state. Therefore, it is determined that the vehicle is accelerating by determining that the vehicle is accelerating when the predetermined value is exceeded.
- the determination unit 103 is a case where the acceleration detected by the acceleration detection unit 101 exceeds a predetermined value, and the parking detection brake is not in a braking state by the brake detection unit 102 (the vehicle is stopped). It is also possible to determine that the vehicle is in a running state. That is, when the parking brake is not in a braking operation, the vehicle is likely to be in a traveling state. Therefore, in addition to the case where the acceleration detection unit 101 determines that the vehicle is accelerating, it can be more accurately determined that the vehicle is stopped by the braking operation by the parking brake.
- the determination unit 103 determines that the vehicle is in a stopped state when the braking operation by the parking brake is detected by the brake detection unit 102 when the acceleration of the vehicle is within a predetermined range. You can also Note that this predetermined range includes a state where the vehicle has not accelerated.
- the vehicle Before stopping the vehicle, the vehicle is decelerated at any time, so the acceleration of the vehicle first falls below the lower limit of the predetermined range. After that, the vehicle stops, so the acceleration is not accelerating or takes values before and after. When the acceleration changes in this way, the vehicle is likely to stop.
- the acceleration detected by the acceleration detection unit 101 can be set to the predetermined value. Even when the vehicle is not accelerating, the output of the acceleration detector 101 is not always constant. For example, there are places where the acceleration is output as a biased value, such as a sloped place. Since acceleration is a relative value from an unaccelerated state, accuracy may be lacking when based on an unbiased state value.
- the acceleration when it is determined that the vehicle is in a stopped state is set to the predetermined value.
- the value corresponding to the current position of the vehicle can be used as a reference, and as a result, more accurate acceleration can be obtained. Since the acceleration is accurately obtained, it is possible to prevent an image from being displayed at an inappropriate acceleration and erasing the image when the display is controlled based on the acceleration.
- the predetermined value can be set every time the vehicle stops. By setting the predetermined value every time, a reference value corresponding to the position of the vehicle can be determined. As a result, even if the output value of the acceleration detection unit 101 when the vehicle moves and is not accelerated at each destination position is different, the above specified value is appropriately set for each position. Can be set to any value.
- the display control unit 104 deletes the image display by the display unit 105 when the determination unit 103 determines that the vehicle is running.
- the display unit 105 displays an image from the display screen.
- FIG. 2 is a flowchart showing processing of an image display method according to the embodiment of the present invention. Next, the processing of the image display method which is useful for the embodiment of the present invention will be described with reference to FIG. Prior to the start of this process, the display control unit 104 displays an image on the display unit 105.
- the acceleration detection unit 101 detects the acceleration of the vehicle (step S201).
- the determination unit 103 determines whether or not the detected acceleration exceeds a predetermined value (step S202).
- the process proceeds to step S205.
- the determination unit 103 determines whether or not the braking operation force by the parking brake provided in the vehicle is detected by the brake detection unit 102 (step S202). S203).
- step S202 it is further determined whether or not the force is returned to the predetermined range after the acceleration, which is not based on whether the acceleration exceeds the predetermined value, falls below the lower limit of the predetermined range. You can also. When this condition is satisfied, it can be determined that the vehicle is in a stopped state from the viewpoint of acceleration, and otherwise, it can be determined that the vehicle is in a traveling state. Therefore, it is possible to more appropriately determine whether the vehicle is running or stopped.
- step S203 If the braking operation by the parking brake is not detected (step S203: No), it is determined that the vehicle is traveling, so the display control unit 104 displays the image displayed on the display unit 105. Erase (step S204). Since the vehicle is running, the process returns to step S201 to detect the subsequent change.
- step S203 If the braking operation by the parking brake is detected (step S203: Yes), it is determined that the vehicle is stopped, so the display control unit 104 displays an image on the display unit 105 (step S205). Then, a series of processing is completed.
- FIG. 3 is a perspective view showing the arrangement of each component in the image display apparatus of this embodiment.
- An image display device 100 that works on the above-described embodiment will be described with reference to FIG.
- a display panel 301 of an in-vehicle electronic device is attached to a main body 300.
- a playback device 303 and an acceleration sensor 304 are arranged inside the main body 300.
- a disc insertion slot 305 is disposed in front of the main body 300, and a disc to be played back by the playback device 303 is inserted from the disc insertion slot 305.
- the display panel 301 has a display monitor 302 such as a liquid crystal display monitor, and is displayed on the display monitor 302 with image information and character information power such as a navigation map screen and a television screen.
- the display panel 301 has a configuration in which the display monitor 302 is housed and disposed in a rectangular box-shaped housing. The housing covers the entire back surface and side surfaces of the display monitor 302 and has a frame-like outer periphery on the display surface. Surrounded by.
- FIG. 4 is a block diagram showing an example of the hardware configuration of the image display apparatus that is useful in the embodiment of the present invention. Next, the hardware configuration of the image display apparatus according to the embodiment of the present invention will be described with reference to FIG.
- an image display device 100 includes a CPU 401, a RAM 402, a ROM 403, and an H D404 is included. Further, a user operation unit 410, an ACC (accessory power supply) 411, an acceleration sensor 412 that detects vehicle acceleration, and an inclination angle sensor 413 that detects an inclination angle of the vehicle are connected to the image display device 100. Yes.
- the acceleration sensor 412 realizes the function of the acceleration detection unit 101.
- a GPS 414 that detects the position of the vehicle (latitude and longitude information) by receiving radio waves from an artificial satellite
- a gyro sensor 415 that detects the traveling direction of the vehicle
- a parking that detects the operating state of the parking brake
- a brake sensor 416 is connected to the image display device 100.
- the parking brake sensor 416 detects when the parking brake is applied and turns it off when the parking brake is applied! / ⁇ .
- the display 420, the amplifier 421, the speaker 422, and the force image display device 100 are connected.
- the display 420 corresponds to the display unit 105.
- the CPU 401 performs display control and also controls the entire image display apparatus 100.
- the RAM 402 is used as a work area for the CPU 401.
- the ROM 403 stores a basic processing program for the image display device 100.
- the HD 404 is a nonvolatile storage medium and stores various types of information. Alternatively, or in addition to the hard disk, the HD404 can be a removable recording medium such as a DVD or a compact disk (CD).
- the CPU 401, RAM 402, ROM 403, and HD 404 realize the functions of the calorie speed detection unit 101, the brake detection unit 102, the determination unit 103, and the display control unit 104.
- the user operation unit 410 realizes its function by, for example, a remote controller, a touch panel, a button provided in the image display device 100, or the like.
- the display 420 specifically includes a liquid crystal display, an organic EL display, and the like.
- a communication interface (IZF) 423 performs data communication with an external communication device by radio.
- FIG. 5 is a block diagram showing a functional configuration of the image display apparatus of this embodiment.
- the image display device 100 includes a detection unit 501, a sampling unit 502, a travel determination unit 503, an ACC 411, a calo speed sensor 412, a parking brake sensor 416, and a display 420.
- the ACC 411 Since the ACC 411 is energized when the engine is started, by notifying the detection unit 501 that the ACC 411 is energized, the ACC 411 operates as a detection start signal of the running state of the vehicle.
- the acceleration sensor 412 detects the acceleration and outputs it to the detection unit 501.
- Detection unit 501 detects the output from acceleration sensor 412 after ACC 411 is energized.
- the output of the acceleration sensor 412 is 0 to 5V, and the output when not accelerating is 2.5V. However, depending on the position of the vehicle, the gravitational force may be biased, such as when the ground is tilted. In this case, the output may not be 2.5V. In this case, the output in the initial state is the output when the vehicle accelerates.
- the initial value of the output in the initial state where acceleration is not strong is handled as 2.53 V instead of 2.5 V.
- the parking brake sensor 416 detects that the parking brake is ON, that is, the parking brake is applied, this initial value is reset.
- the output of the acceleration sensor 412 at that time is set as an initial value. For example, if the output of the acceleration sensor 412 at this time is 2.51V, replace the initial value with the current output of 2.51V from the previous 2.53V.
- the output of the acceleration sensor 412 increases to 2.6 V, 2.7 V, and so on each time the vehicle accelerates, assuming that the output when acceleration is not strong is 2.5 V. On the other hand, the output of the acceleration sensor 412 decreases to 2.4V, 2.3V, and so on each time the vehicle decelerates.
- the sampling unit 502 samples the output of the acceleration sensor 412 detected by the detection unit 501. For example, if the output detected by the detection unit 501 is 2.5 V, blurring occurs due to vibration that is not always constant at 2.5 V. Therefore, by sampling all the outputs for a certain period, the value excluding the blur is obtained as the output. Sampling is executed with 1 second as one cycle.
- Travel determination unit 503 determines whether the vehicle is traveling based on the output from sampling unit 502. Whether or not the vehicle is running is determined based on whether or not the force is within ⁇ 0.IV of the initial output force of the sampling unit 502. When the output of the sampling unit 502 exceeds the initial value +0. IV, the acceleration exceeds the level, so it is determined that the vehicle is in a running state.
- the vehicle When the vehicle stops, the vehicle first decelerates, so the output of the sampling unit 502 falls below the initial value of ⁇ 0. IV and then falls within ⁇ 0. IV of the initial value. Thereafter, when the parking brake is applied and the parking brake sensor 416 detects that the parking brake is on, the traveling determination unit 503 determines that the vehicle is stopped. Then, a stop signal is output to the display 420. When the display 420 receives the stop signal, the display 420 restores the display of the erased screen.
- FIG. 6 is a flowchart showing the processing of the image display apparatus of this embodiment. After energization by ACC411, the process shown in FIG. 6 starts. First, initial values are set (step S601). That is, the detection unit 501 detects the output of the acceleration sensor 412 when energized by the ACC 411, and the sampling unit 502 samples the output. Then, the travel determination unit 503 sets the obtained acceleration as an initial value.
- the detection unit 501 detects the acceleration from the acceleration sensor 412 (step S602).
- the detected acceleration is sampled by the sampling unit 502 and sent to the traveling determination unit 503.
- step S603 travel determination unit 503 determines whether or not the force is within an initial value ⁇ 0. IV (step S603). That is, the obtained acceleration is compared with the initial value set by force, and it is determined whether the difference is within 0.4V. If the difference is greater than 0. IV (step S603: No), the process proceeds to step S604.
- step S604 travel determination unit 503 determines whether or not the acceleration is smaller than the initial value (step S604). If the acceleration is smaller than the initial value (step S604: Yes), the vehicle is decelerating, so the traveling determination unit 503 sets that the vehicle is decelerating (step S605). If the car speed is greater than the initial value (Step S604: No), the vehicle is accelerating and The line determination unit 503 cancels the setting that the vehicle is decelerating (step S606).
- step S605 Since the vehicle is traveling in both cases of deceleration (step S605) and acceleration (step S606), travel determination unit 503 outputs a signal indicating that the vehicle is traveling (step S607). ), Return to step S602.
- step S603: Yes the running determination unit 503 determines whether the setting is a decelerating force (step S608).
- step S608: No the process proceeds to step S607, and when the setting is decelerating, the traveling determination unit 503 confirms that the parking brake is ON, that is, the parking brake is applied. Is determined by the parking brake sensor 416 to determine whether it is! / (Step S609).
- step S609: No If the parking brake is OFF (step S609: No), that is, if the parking brake is not applied, the process proceeds to step S607. If the parking brake is ON (step S609: Yes), that is, if the parking brake is applied, the vehicle is in a stopped state, so the travel determination unit 503 outputs a signal indicating that the vehicle is stopped (step S6 10 ), A series of processing ends.
- FIG. 7 is an explanatory diagram showing the relationship between the acceleration of the vehicle and the determination of the running state. The process from the start of the engine to the start of travel of the vehicle, deceleration and stop will be described with reference to FIG. First, when the vehicle engine is started, the machine in the vehicle is energized and the ACC is activated (T701). At this time, the acceleration is detected from the acceleration sensor 412 and the value obtained by sampling the output is set as the initial value. In Figure 7, 2.53V is detected, so this value is the initial value (T702)
- the sampling unit 502 samples the output from the acceleration sensor 412 at a cycle of 1 second.
- the output from the sampling unit 502 continuously changes to 2.54V, 2.5V, and 2.57V (T703).
- the traveling determination unit 503 outputs a traveling signal when the parking brake is turned off (T704). Or, when switching to the parking brake OFF is not detected, a running signal is output when the output exceeds the initial value +0. IV (T705).
- the display 420 cannot output the video, and therefore receives the running signal and cuts the video output. In other words, when the parking brake is OFF, the video output is cut off. The force that cuts the video display at the timing of T704. If the parking brake signal line is modified, the parking brake sensor 416 will Therefore, if it cannot be detected that the vehicle is running, the video display is cut off at the accelerated timing as shown in T705.
- the output of the sampling input 502 is changed to 2.67V and 2.63V (T706), and becomes 2.51V (T707).
- This 2.51V is within the range of the initial value ⁇ 0.IV when viewed from the initial value of 2.53V, but it is the output value after the acceleration state in ⁇ 706, not the output value after the deceleration state.
- the traveling determination unit 503 maintains the output of the traveling signal.
- travel determination unit 503 When the parking brake is ON (T710), travel determination unit 503 outputs a stop signal. At this time, the display 420 receives the stop signal and returns the display of the image output. On the other hand, since the output of the sampling unit 502 after the parking brake is turned on is 2.5V (T711), the initial value is updated to 2.53V force, which is 2.5V detected here.
- the vehicle it is possible to determine whether the vehicle is in a running state or in a stopped state based on the output of the acceleration sensor.
- This acceleration sensor Since it is built in the image display device, the driver must disassemble the image display device and modify the interior when trying to bring the image display device to a stationary state while driving. This is difficult to modify, unlike parking brakes that determine when a vehicle has stopped. Therefore, according to the present invention, it is possible to delete the display of the image while the vehicle is traveling, after taking safety measures so that the driver is not easily remodeled.
- the image display method described in the present embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation.
- This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by reading the recording medium force by the computer.
- the program may be a transmission medium that can be distributed through a network such as the Internet.
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Abstract
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Applications Claiming Priority (2)
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JP2004322850 | 2004-11-05 | ||
JP2004-322850 | 2004-11-05 |
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Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60192572U (ja) * | 1984-05-31 | 1985-12-20 | パイオニア株式会社 | 車載用映像受信装置 |
JPH0111570Y2 (ja) * | 1981-04-13 | 1989-04-05 | ||
JPH0683296A (ja) * | 1992-08-31 | 1994-03-25 | Alpine Electron Inc | 車載用映像表示装置 |
JPH0921650A (ja) * | 1995-07-06 | 1997-01-21 | Kenwood Corp | 移動体の状態検出装置 |
JP2580139B2 (ja) * | 1986-11-26 | 1997-02-12 | 日産自動車株式会社 | 車両用サスペンシヨン装置 |
JP2654405B2 (ja) * | 1989-10-18 | 1997-09-17 | パイオニア株式会社 | 車両停止検出機能を有する車載映像表示装置 |
JPH10293139A (ja) * | 1997-04-16 | 1998-11-04 | Murata Mfg Co Ltd | 速度演算装置 |
JPH11155109A (ja) * | 1997-11-20 | 1999-06-08 | Matsushita Electric Ind Co Ltd | 映像信号処理装置 |
JP2000306315A (ja) * | 1999-04-16 | 2000-11-02 | Pioneer Electronic Corp | 情報再生装置 |
-
2005
- 2005-11-04 WO PCT/JP2005/020296 patent/WO2006049247A1/ja not_active Application Discontinuation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0111570Y2 (ja) * | 1981-04-13 | 1989-04-05 | ||
JPS60192572U (ja) * | 1984-05-31 | 1985-12-20 | パイオニア株式会社 | 車載用映像受信装置 |
JP2580139B2 (ja) * | 1986-11-26 | 1997-02-12 | 日産自動車株式会社 | 車両用サスペンシヨン装置 |
JP2654405B2 (ja) * | 1989-10-18 | 1997-09-17 | パイオニア株式会社 | 車両停止検出機能を有する車載映像表示装置 |
JPH0683296A (ja) * | 1992-08-31 | 1994-03-25 | Alpine Electron Inc | 車載用映像表示装置 |
JPH0921650A (ja) * | 1995-07-06 | 1997-01-21 | Kenwood Corp | 移動体の状態検出装置 |
JPH10293139A (ja) * | 1997-04-16 | 1998-11-04 | Murata Mfg Co Ltd | 速度演算装置 |
JPH11155109A (ja) * | 1997-11-20 | 1999-06-08 | Matsushita Electric Ind Co Ltd | 映像信号処理装置 |
JP2000306315A (ja) * | 1999-04-16 | 2000-11-02 | Pioneer Electronic Corp | 情報再生装置 |
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