JP2010064587A - Display device and display system - Google Patents

Abstract

The present invention reduces the risk when an occupant collides with a rear monitor when an unexpected situation occurs.
Vehicle information including a reproduction source section for generating a video signal, display means for displaying a video signal generated by the reproduction source section (rear monitor 10), a vehicle running state, and a seat belt wearing state is acquired. The vehicle information acquisition means (electronic control unit 20) to perform and the video signal generated by the reproduction source unit 34 are processed and displayed on the display unit 11, and the vehicle running state and seat belt wearing acquired by the vehicle information acquisition unit The control unit (main control unit 32) controls the supply of power supplied to the display unit according to the state.
[Selection] Figure 3

Description

  The present invention particularly relates to a display device and a display system suitable for use in a moving body such as a vehicle.

  2. Description of the Related Art In recent years, video / audio equipment mounted on vehicles has become compatible with rear entertainment systems (hereinafter abbreviated as RES) simply by preparing a rear monitor, for example. As a result, the driver receives a service of high-performance navigation, and at the same time, a guest (occupant) seated on the rear seat can enjoy a hospitality service using a television or a DVD (Digital Versatile Disc) video.

  On the other hand, as a technique for urging passengers to wear seat belts in the passenger compartment to avoid danger, conventionally, as disclosed in Patent Document 1, for example, an alarm sound is sounded when a seat belt is not worn while traveling. Alternatively, a seat belt non-wearing alarm device that displays an alarm on a display device in accordance with an alarm sound is known.

JP 2004-268873 A

However, the technique disclosed in Patent Document 1 described above is intended for a driver so that the driver can accurately recognize the meaning of the alarm and take appropriate measures for the alarm. It is not intended for passengers.
On the other hand, in recent years, display devices installed in vehicle interiors have been diversified. In particular, the above-described RES rear monitor is viewed as represented by a headrest wearing type due to a difference in mounting form in the vehicle interior. There are a type in which an occupant is fixed and an occupant shared viewing type as represented by a ceiling-suspended type or a floor console type.

When the above-described rear monitor is mounted in the passenger compartment, a passenger seated on the rear seat and viewing the content is watching the content. For example, an unexpected situation such as an accident may cause the passenger to collide with the rear monitor. .
The most popular liquid crystal display device currently used as an onboard rear monitor is when the occupant collides, for example, even if the liquid crystal surface is broken, consideration is given to avoid scattering, but the liquid crystal surface is in an energized state. I can't say that there is no danger to the crew.

  The present invention has been made to solve the above-described problem, and can reduce the risk of an occupant when an occupant collides with a display device such as a rear monitor when an unexpected situation such as an accident occurs. And to provide a display system.

  In order to solve the above-described problems, a display device according to the present invention acquires display information for displaying information, and monitoring information used when supplying power to the display means from the outside, and the acquired monitoring information Accordingly, a control unit that controls supply of power to the display unit is provided.

  Further, the display system of the present invention provides reproduction source means for generating a video signal, display means for displaying the video signal generated by the reproduction source means, vehicle information including a vehicle running state and a seat belt wearing state. The vehicle information acquisition means to be acquired and the video signal generated by the reproduction source means are processed and displayed on the display means, and according to the vehicle running state and seat belt wearing state acquired by the vehicle information acquisition means. And control means for controlling supply of power supplied to the display means.

  According to the present invention, it is possible to provide a display device and a display system that can reduce the risk of an occupant when an occupant collides with the display device when an unexpected situation such as an accident occurs.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a display device according to Embodiment 1 of the present invention. As shown in FIG. 1, the display device according to Embodiment 1 of the present invention includes a display unit 1, a video processing unit 2, a device control unit 3, a storage unit 4, and an opening / closing device unit 5. Is done.

On the display unit 1, a video signal generated by the device control unit 3 or coming from the outside is processed and displayed by the video processing unit 2. The display unit 1 is configured by, for example, a liquid crystal display device (LCD) module or an organic EL (Electro-Luminescence) module.
The video processing unit 2 stores information generated by the device control unit 3 in a built-in or expanded display memory, and reads out and outputs the information to the display unit 1 in synchronization with the display timing of the display unit 1. A video signal supplied from the outside is converted in accordance with the specifications of the display unit 1 and output to the display unit.
Although not shown, the display unit 1 composed of a liquid crystal or an organic EL module includes, for example, a display panel, a control circuit, a column / row driving circuit, and a power supply unit. Here, the power supply unit is subjected to ON / OFF control of power supply by the device control unit 3.

  The video signal processed by the video processing unit 2 is separated into an RGB signal and a horizontal / vertical synchronizing signal by the control circuit. Among these signals, the RGB signal is once latched by the column driving circuit and then displayed at a designated timing. The constant current drive is performed simultaneously for the number of columns. The horizontal / vertical synchronizing signal is converted into a predetermined voltage by the row driving circuit, and the ON / OFF state of the selected pixel is determined by the constant current signal output by the column driving circuit, and a desired display is displayed on the display panel. Do. All of these are operated by power supplied from a power supply unit that is ON / OFF controlled by the apparatus control unit 3. For this reason, the above-described display unit 1 functions as “display means for displaying information”.

The device control unit 3 is constituted by, for example, a microprocessor and performs various controls of the display device in accordance with a program recorded in the storage unit 4 that is built in or externally attached. Here, the “control means for obtaining the monitoring information used when supplying power to the display means from outside and controlling the supply of power to the display means according to the obtained monitoring information” according to claim 1 Function as.
Here, the monitoring information is, for example, when the display device is applied to an in-vehicle device as a rear monitor, a vehicle speed signal obtained from the vehicle speed sensor 6 or the electronic control unit via communication, an output of the seat belt wearing detection switch 7, Or vehicle information, such as passenger detection sensor 8 output, is said. These vehicle information may be acquired from the electronic control unit by communication via an in-vehicle LAN (Local Area Network) called CAN (Control Area Network).

  The opening / closing device unit 5 is an electric opening / closing mechanism that can switch the display surface of the display unit 1 into two states, that is, a spread state and a protection state in which the display surface is covered and protected, and details will be described later.

  FIG. 2 is a flowchart showing the basic operation of the display apparatus according to Embodiment 1 of the present invention. Hereinafter, the operation of the display device according to the first embodiment of the present invention shown in FIG. 1 will be described in detail with reference to the flowchart of FIG.

  The apparatus control unit 3 confirms that power is supplied to the display unit 1 (step ST201 “YES”), and first determines whether or not the vehicle is traveling (step ST202). The determination as to whether or not the vehicle is running can be realized by monitoring the vehicle speed signal measured by the vehicle speed sensor 6 that the apparatus control unit 3 can capture via the input port of the microprocessor. Note that, in the power supply determination process in step ST201, when it is determined that power is not supplied (step ST201 “NO”), that is, when the occupant is not viewing the content on the display unit 1, the device control unit 3 Performs control to continue the power supply OFF to the display unit 1 (step ST206).

When it is determined that the vehicle is traveling in the determination process during traveling in step ST202 (step ST202 “YES”), the device control unit 3 further determines whether or not the seat belt is worn (step ST203). When it is determined that the vehicle is stopped and safe (step ST202 “NO”), apparatus control unit 3 continues to turn on power supply to display unit 1 (step ST204). The determination of whether or not the seat belt is worn can be realized by monitoring a signal detected by the seat belt wearing detection switch 7 that can be taken in by the device control unit 3 via the input port.
Next, when it is determined in the seat belt wearing determination process in step ST203 that the occupant is wearing the seat belt (step ST203 "YES"), the device control unit 3 determines that it is safe and displays the display unit 1. If the seat belt is not worn (step ST203 “NO”), the device control unit 3 determines that there is a danger and the display unit 1 is connected to the display unit 1. The power supply is switched from the ON state to the OFF state (step ST206).

As described above, according to the display device according to the first embodiment of the present invention, the device control unit 3 indicates that the vehicle is traveling and the occupant is wearing a seat belt, Monitoring is performed by a vehicle speed sensor attached to the vehicle, a seat belt wearing detection switch attached to a seat belt buckle, etc., and power supply stop control is performed in a state where power is supplied to the display unit 1.
That is, when the vehicle is traveling and the occupant is not wearing a seat belt, the device control unit 3 determines that it is dangerous and stops the power supply to the display unit 1 and the vehicle is stopped or When the vehicle is running and the occupant is wearing a seat belt, it is determined that the vehicle is safe and the power supply to the display unit 1 is continued. For this reason, the display unit 1 Since the power is not automatically turned on, the risk of the passenger when the passenger collides with the display device can be reduced.

In addition, according to the above-described display device according to the first embodiment of the present invention, only the case where it is applied to an in-vehicle device is illustrated, but it can be similarly applied to a general-purpose device such as a PC.
In this case, the monitoring information acquired from the outside is, for example, failure information, and the information can be acquired by wire or wirelessly such as infrared rays.

Embodiment 2. FIG.
FIG. 3 is a diagram showing a configuration of a display system according to Embodiment 2 of the present invention. The display system referred to here is an on-vehicle when the display device shown in FIG. 1 is used as a rear monitor for an on-vehicle device. The entire device is shown.
As shown in FIG. 3, the display system according to Embodiment 2 of the present invention includes a rear monitor 10 (display means), an electronic control unit 20 (vehicle information acquisition means), and a head unit 30 (reproduction source means and control). Means).

The rear monitor 10 includes a display unit 11, a video processing unit 12, a rear monitor control unit 13, and an opening / closing device unit 14.
The display unit 11 and the video processing unit 12 are the same as those shown in FIG. 1 (the display unit 1 and the video display unit 2). Here, the rear monitor control unit 13 includes the device control unit 3 described in FIG. Unlike the above, the video signal coming from the head unit 30 (by a reproduction source described later) is delivered to the video processing unit 12 under the control of the head unit 30 (the main control unit 32 thereof), and the supply of power to the display unit 11 is stopped. And the opening / closing control of the lid of the opening / closing device section 14 is performed. The opening / closing device unit 14 is an electric opening / closing mechanism that switches the display surface of the display unit 11 into two states: a spread state and a protection state in which the display surface is covered and protected.

  The head unit 30 includes a vehicle information acquisition unit 31, a main control unit 32, a power supply unit 33, a reproduction source unit 34, an operation unit 35, and a storage unit 36.

The vehicle information acquisition unit 31 acquires vehicle information including a vehicle running state and a seat belt wearing state from the outside. Here, the vehicle information acquisition unit 31 transmits signals detected by the vehicle speed sensor 6, the seat belt wearing detection switch 7, and the occupant detection sensor 8 mounted on each part of the vehicle via the in-vehicle LAN and the electronic control unit 20. It explains as what is acquired in (1).
Here, the signal detected by the occupant detection sensor 8 is a signal obtained by performing image processing on an image photographed by a camera provided in the vicinity of the mounting position of the rear monitor 10 in the vehicle interior, or detected by a seating sensor. An occupant detection signal.

The main control unit 32 processes the video signal generated by the reproduction source unit 34 and displays it on the display unit 11 of the rear monitor 10, and includes a vehicle running state and a seat belt wearing state acquired by the vehicle information acquisition unit 31. The function as the control means according to claim 2, which controls the supply of power supplied to the display unit 11 in accordance with the state information.
In addition, the main control unit 32 acquires information on the occupant's seating state via the vehicle information acquisition unit 31, and the vehicle information acquisition unit 31 detects the occupant seated in the backseat of the corresponding seat belt. The supply of power supplied to the display unit 11 is controlled according to the wearing state. Further, the main control unit 32 can switch the opening / closing device unit 14 of the rear monitor 10 from the spread state to the protection state according to the state information including the vehicle running state and the seat belt wearing state acquired by the vehicle information acquisition unit 31. It is.

The power supply unit 33 performs power supply control to each block in the head unit 30 and to the display unit 11 in the rear monitor 10 according to control by the main control unit 32.
The reproduction source unit 34 is a video input source such as a TV or DVD, and the operation unit 35 is a common viewing such as a ceiling-suspended type or a floor console type as the rear monitor 10 in addition to the selection input of the reproduction source and volume adjustment. When a display device of the type is used, the seating status of the occupant is set and input in advance by the user including the driver. The storage unit 36 stores various programs executed by the main control unit 32, and stores a seating state of the occupant set and input by the operation unit 35 for each shared viewing type rear monitor 10. The main control unit 32 refers to this table and monitors the wearing state of the corresponding seat belt specified by the seating information stored in the storage unit 36, thereby supplying power to the display unit 11 of the rear monitor 10. It is also possible to control.

  FIG. 4 is a schematic diagram for explaining the mounting form of the rear monitor 10 on the vehicle, and a headrest type (FIG. 4 (a)) in which an occupant seated in the second or third row of the vehicle is fixed, A ceiling suspended type (FIG. 4B) and a floor console type (FIG. 4C) shared and viewed by passengers seated in the second or third row are shown.

  Here, in any mounting form, in the protected state, the rear monitor 10 (display unit 11) has a lid (or frame) 40 at a portion facing the display surface 11a, and the lid 40 is provided by an electric opening / closing mechanism (not shown). For example, by sliding up and down as shown in FIG. 4A, or by rotating the display unit 11 around the tilt axis 50 as shown in FIGS. 4B and 4C, There are two states: a “spread state” in which the occupant can view the content displayed on the display unit 11 of the rear monitor 10 and a “protection state” in which the panel surface is covered and protected by the lid 40.

For example, in the case of the ceiling-suspended type shown in FIG. 4B, the cover 40 is set to a protection state that is positioned so as to cover the panel surface of the display unit 11 by applying a load in the A direction to the tilt shaft 50 of the rear monitor 10. In the case of setting the spread state by tilting, it has an electric opening / closing mechanism (opening / closing device section 14 in FIG. 3) for rotating the rear monitor 10 in the B direction by a motor and a reduction gear (not shown) with a torque higher than the load.
When the rear monitor 10 is not used, the rear monitor 10 is rotated so as to be substantially parallel to the ceiling and stored in a frame including the lid 40. When the rear monitor 10 is used, the panel surface of the rear monitor 10 can be easily seen by the occupant by remote control operation. It is structured to automatically tilt and set the position. It is also possible to finely adjust the tilt position by manual adjustment of the occupant.

  FIG. 5 is a flowchart showing the operation of the display system according to Embodiment 2 of the present invention. Hereinafter, the operation of the display system according to Embodiment 2 of the present invention shown in FIG. 3 will be described in detail with reference to the flowchart of FIG.

The head unit 30 (main control unit 32) confirms that power is supplied to the display unit 11 of the rear monitor 10 (step ST501 “YES”), and first determines whether or not the vehicle is running (step ST501). Step ST502). Whether or not the vehicle is running is determined by the main control unit 32 of the head unit 30 using the vehicle information acquisition unit 31 and the vehicle speed pulse measured by the vehicle speed sensor 6 via the in-vehicle LAN and the electronic control unit 20. It is possible by acquiring through communication.
When power is not supplied (step ST501 “NO”), that is, when the occupant is not viewing content from the rear monitor 10 (display unit 11), the main control unit 32 controls the power supply unit 33. Then, the power supply is turned off (step ST511).

If it is determined that the vehicle is traveling in the traveling determination process in step ST502 (step ST502 “YES”), the occupant to view is fixed so that the mounting type of the rear monitor 10 is represented by the headrest wearing type. In the case (step ST503 “fixed”), the main control unit 32 further determines whether or not the seat belt is worn (step ST505).
When it is determined that the vehicle is stopped (step ST502 “NO”), the main control unit 32 continues to supply power to the display unit 11 of the rear monitor 10 (step ST507).

  On the other hand, in the mounting type determination process of the rear monitor 10 in step ST505, when the mounting type of the rear monitor 10 is a passenger shared viewing type as represented by a ceiling hanging type or a floor console type (step ST503 “shared”). ) The main control unit 32 refers to the seat information acquired from the occupant detection sensor 8 via the vehicle information acquisition unit 31 or by referring to the content manually set by the operation unit 35 and set and registered in the storage unit 36. Based on the acquired seat information, the seat belt whose wearing state should be detected is specified (step ST504).

Subsequently, the main control unit 32 determines whether or not the corresponding seat belt is worn (step ST505). Whether or not the seat belt is worn is determined by the main control unit 32 of the head unit 30 communicating the signal detected by the seat belt wearing detection switch 7 taken in by the vehicle information acquisition unit 31 via the in-vehicle LAN and the electronic control unit 20. It is possible to obtain by.
Here, when it is determined that the corresponding seat belt is worn (step ST505 “YES”), the main control unit 32 controls the power supply unit 33 to turn on the power supply to the display unit 11 of the rear monitor 10. (Step ST506), and when it is determined that the seat belt is not worn (step ST505 "NO"), the power supply unit 33 is controlled to switch the power supply to the display unit 11 of the rear monitor 10 from ON to OFF ( Step ST508).

  Subsequently, the main control unit 32 determines whether or not the tilt function including the opening / closing device unit 14 is present (step ST509). If the tilt function is provided (step ST509 "YES"), the electric opening / closing by the device opening / closing unit 14 is performed. By closing the lid 40 by controlling the mechanism, the spread state is switched to the protection state, and the above-described series of processing ends (step ST510). If the tilt mechanism is not provided, the process of closing the lid 40 in step ST510 is skipped, and the series of processes described above ends.

  As described above, according to the display system according to the second embodiment of the present invention, the main control unit 32 of the head unit 30 has the headrest shown in FIG. As represented by the type, when there is only one occupant viewing the content displayed on the display unit 11 of the rear monitor 10, it is possible to specify which seat belt is to be worn, so that the vehicle information acquisition unit By acquiring the information from the specific seat belt wearing detection switch 7 by the signal line or communication, the power is turned off so that the content cannot be viewed unless the seat belt is worn while traveling. Even if an occupant collides with the rear monitor 10 (display unit 11) due to the occurrence of the accident, the display unit 11 is not already in the energized state, and thus danger can be avoided. A.

  Further, according to the display system according to the second embodiment of the present invention, for example, as represented by the ceiling hanging type shown in FIG. 4B or the floor console type shown in FIG. Even if the occupant who views the content cannot be specified, the main control unit 32 acquires information on which seat the occupant is seated by the occupant detection sensor 8 via the vehicle information acquisition unit 31 ( Alternatively, the corresponding seat belt information to be detected is acquired by referring to the table of the storage unit 36), and further, the information from the corresponding seat belt wearing detection switch 7 is acquired by a signal line or communication, so that the vehicle is traveling If the user does not wear a seat belt, the power supply to the display unit 11 is turned off so that the content cannot be viewed. Already display unit 11 even occupant crashing into the rear monitor 10 (display unit 11) is capable of avoiding danger to not energized.

  Further, according to the display system according to the second embodiment of the present invention, the main control unit 32 of the head unit 30 further controls the switchgear unit 14 after stopping the power supply to the display unit 11 of the rear monitor 10. Thus, even if an unexpected situation such as an accident occurs in a state where the seat belt is not worn by switching the cover 40 covering the display surface of the display unit 11 from the spread state to the protected state, the display unit 11 Since it is not already in the energized state, the passenger's danger is avoided, and the panel surface formed by the liquid crystal or organic EL mounted as the display unit 11 by the lid 40 can be protected from the impact at the time of collision.

  Further, according to the display system according to the second embodiment of the present invention, the power supply to the display unit 11 was turned on and the user or the content was watched immediately before traveling, but the passenger was in the current traveling. In such a situation, the power supply is automatically turned off. In this case, the rear monitor 10 does not operate, and therefore, it can contribute to preventing the rear monitor 10 (display unit 11) from forgetting to turn off the power. A power saving effect can be obtained.

The functions of the constituent blocks included in the display device according to the first embodiment of the present invention or the display system according to the second embodiment are all realized by software, or at least a part thereof is hardware. It may be realized.
For example, data processing in the device control unit 3 that acquires monitoring information used when supplying power to the display unit 1 from the outside and controls the supply of power to the display unit 1 according to the acquired monitoring information; Alternatively, the video signal generated by the reproduction source unit 34 is processed and displayed on the display unit 11 (rear monitor 10), and the display is performed according to the vehicle running state and the seat belt wearing state acquired by the vehicle information acquisition unit 31. Data processing in the main control unit 32 that controls supply of power supplied to the unit 11 may be realized on a computer by one or more programs, and at least a part thereof may be realized by hardware. .

It is a block diagram which shows the structure of the display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the basic operation | movement of the display apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the system configuration | structure of the display system which concerns on Embodiment 2 of this invention. It is the schematic diagram shown in order to demonstrate the mounting form to the vehicle of the rear monitor used with the display system which concerns on Embodiment 2 of this invention. It is a flowchart which shows operation | movement of the display system which concerns on Embodiment 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Display part (display means), 2 Image | video processing part, 3 Apparatus control part (control means), 4 Memory | storage part, 5 Opening / closing apparatus part, 6 Vehicle speed sensor, 7 Seat belt wearing detection switch, 8 Crew detection sensor, 10 Rear monitor, DESCRIPTION OF SYMBOLS 11 Display part, 12 Video processing part, 13 Rear monitor control part, 14 Switchgear part, 20 Electronic control unit, 30 Head unit, 31 Vehicle information acquisition part, 32 Main control part, 33 Power supply part, 34 Playback source part, 35 Operation unit, 36 storage unit, 40 lid, 50 tilt axis.

Claims (6)

Display means for displaying information;
Control means for acquiring monitoring information used when supplying power to the display means from outside, and controlling the supply of power to the display means according to the acquired monitoring information;
A display device comprising: Playback source means for generating a video signal;
Display means for displaying a video signal generated by the reproduction source means;
Vehicle information acquisition means for acquiring vehicle information including a vehicle running state and a seat belt wearing state;
The video signal generated by the reproduction source means is processed and displayed on the display means, and the power is supplied to the display means according to the vehicle running state and the seat belt wearing state acquired by the vehicle information acquisition means. Control means for controlling the supply of
A display system characterized by comprising: The display means is mounted on a rear monitor,
The vehicle information acquisition means
The vehicle information including the vehicle running state and the seat belt wearing state is acquired via a sensor connected via an in-vehicle LAN, and is mounted on a head unit together with the reproduction source unit and the control unit. Item 3. The display system according to Item 2. The vehicle information acquisition means further acquires information related to the seating state of the occupant,
The control means includes
The power supply to be supplied to the display means is controlled according to the wearing state of the corresponding seat belt specified when the vehicle information acquisition means detects an occupant seated in a rear seat. Item 4. The display system according to Item 3. Operation means;
Storage means,
The control means includes
The power supply to be supplied to the display means is controlled according to the wearing state of the corresponding seat belt specified by the operation means and specified by the seating information stored in the storage means. Item 4. The display system according to Item 3. The display means of the display means further comprises an electric opening and closing mechanism means that can be switched between two states, a spread state and a protection state that covers and protects the display surface with a lid,
The control means includes
6. The electric opening / closing mechanism means is switched from a spread state to a protection state in accordance with a vehicle running state and a seat belt wearing state acquired by the vehicle information acquisition unit. The display system according to item 1.

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