JP4289943B2 - Display device and navigation system - Google Patents

Description

  The present invention relates to a display device and a navigation system.

  Conventionally, a user operation function of a navigation device is roughly classified during driving and during driving, and actions that can be performed during driving are limited. For this reason, a display device has been proposed that restricts the display content during travel.

  The display device described in Patent Document 1 is for explaining such a conventional display device. A viewing angle control shutter is arranged on the front surface of the liquid crystal display panel, and when the vehicle is stopped, The angle control shutter is turned off so that the image displayed on the display panel can be seen on both the driver's seat and the passenger's seat side. The video of the navigation device can be seen, but the video of the DVD playback device is made invisible.

Japanese Patent Laid-Open No. 2003-15535

  However, since the navigation device has limited functions that can be operated while driving, even a non-driver who is operating in the vehicle sits in the passenger seat, etc., can perform operations such as destination setting and search. There is a problem that it cannot be done and is not convenient.

  Therefore, the present invention has been made to solve these problems, and a display device and a navigation system that can restrict functions that can be operated while driving without impairing the convenience of a passenger seat even while traveling. The purpose is to provide.

In order to solve the above-described problem, a display device according to the present invention includes a display unit and a predetermined operation menu display area displayed in at least a part of the display area of the display unit from both the first and second directions. A viewing angle control shutter that can be switched between a first state that can be seen and a second state that can be seen only in one of the first and second directions, and the vehicle is in a stopped state When the vehicle stop state detection unit detects whether or not the vehicle stop state detection unit detects the vehicle stop state, the viewing angle control shutter is switched to the first state , and the vehicle stop state detection unit Shutter drive for switching the viewing angle control shutter to a second state that can be seen only in the second direction, when the vehicle stop state is not detected, with the direction in which the vehicle driver is present as the first direction. Part and Characterized in that it.

  According to the present invention, during traveling, for example, a predetermined operation menu display area is not visible from the driver's seat side and is visible from the passenger seat side, so that the convenience of the passenger seat can be improved even during traveling. Functions that can be operated from the driver's seat side can be restricted without loss.

  Moreover, the display device of the present invention is characterized in that, in the above configuration, a touch panel provided corresponding to the operation menu display area is further provided. According to the present invention, predetermined input can be performed via the touch panel.

  Further, the display device according to the present invention further switches the viewing angle control shutter to the first state or the second state in accordance with an output from a seating detection sensor that detects seating on the seat. It is characterized by changing to the mode. According to the present invention, for example, the viewing angle control shutter can be changed to the mode for switching to the first state or the second state only when a person sits in the passenger seat.

In the navigation system of the present invention, the display unit and the first operation menu display region displayed in at least a part of the display region of the display unit can be viewed from both the first and second directions. A view angle control shutter that can be switched between a state and a second state that can be seen only in one of the first and second directions, and a vehicle stop that detects whether or not the vehicle is stopped When the state detection unit and the vehicle stop state detection unit detect the vehicle stop state, the viewing angle control shutter is switched to the first state , and the vehicle stop state detection unit does not detect the vehicle stop state. , the direction in which the driver of the vehicle is present as a first direction, having a shutter driving unit for switching the viewing angle control shutter in the second state which can be seen only in the second direction And features.

  According to the present invention, during traveling, for example, a predetermined operation menu display area is not visible from the driver's seat side and is visible from the passenger seat side, so that the convenience of the passenger seat can be improved even during traveling. Functions that can be operated from the driver's seat side can be restricted without loss.

  The navigation system according to the present invention further includes a seating detection sensor for detecting seating on a seat in the above-described configuration, and the shutter driving unit moves the viewing angle control shutter to the first angle according to an output of the seating detection sensor. Or a mode for switching to the second state.

  According to the present invention, for example, it can be detected that a person is sitting in the passenger seat, and the viewing angle control shutter can be changed to the mode for switching to the first state or the second state.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is drive | working, the display apparatus and navigation system which can restrict | limit the function which can be operated during a driving | operation without impairing the convenience of a passenger seat can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described.

  FIG. 1 is a block diagram of an AV / car navigation system. As shown in FIG. 1, the AV / car navigation system 1 includes a display device 10, a stop state detection sensor 11, a navigation device 12, a DVD playback device 13, an audio device 14, an amplifier 15, a speaker 16, and a seating detection sensor 17. .

  The stop state detection sensor 11 is a sensor that detects whether or not the vehicle is in a stop state. As the stop state detection sensor 11, for example, a speed sensor that detects the speed of the vehicle, a sensor that detects the state of the side brake, or the like can be used.

  The navigation device 12 includes a map beta base, a GPS receiver, a self-contained navigation sensor, and the like. The map beta base, the GPS receiver and the self-contained navigation sensor are used to detect the current position of the vehicle, and A video signal such as an enlarged map of an intersection with arrows (hereinafter simply referred to as “map image”) indicating the current position and its surrounding map image and the traveling direction of the vehicle, and an audio signal such as voice guidance are output.

  The seating detection sensor 17 detects seating on the driver seat or the passenger seat, and for example, a pressure sensor embedded in the seat can be used. The display device 11 includes a display controller 18, a liquid crystal display panel 19, a viewing angle control shutter 20, and a touch panel 21.

  FIG. 2 is a diagram showing the liquid crystal display panel 19, the viewing angle control shutter 20, and the touch panel 21. As shown in FIG. 2, the viewing angle control shutter 20 is attached to the front surface of the liquid crystal display panel 19.

  The viewing angle control shutter 20 controls a first shutter unit 20a that controls an upper viewing angle with a little lower center as a boundary, a second shutter unit 20b that controls a lower left viewing angle, and a lower right viewing angle. A third shutter portion 20c. The touch panel 21 is attached to the front surface of the viewing angle control shutter 20 and outputs a predetermined detection signal to the display controller 18 when a user's finger or the like comes into contact.

  The display controller 18 individually controls the first shutter unit 20a, the second shutter unit 20b, and the third shutter unit 20c, so that the video reproduced by the DVD playback device 13 on the driver's seat side while the vehicle is traveling. Or hide some operation menu display areas on the driver's seat side while the vehicle is running. Instead of the liquid crystal display panel 19, a CRT (Cathode Ray Tube), an organic EL (Electro Luminescence) display panel, or the like may be used.

  FIG. 3 is a diagram for explaining touch position detection by the touch panel 21. In FIG. 3, 18 is a display controller, 19 is a liquid crystal display panel, 20 is a shutter, 21 is a touch panel, 22 is a contact position detector, and 23 is a position calculator. As shown in FIG. 3, the touch panel 21 is attached to the front surface of the liquid crystal display panel 19 and the viewing angle control shutter 20, and outputs a predetermined detection signal when a user's finger or the like comes into contact.

  The contact position detection unit 22 detects a contact position when the user touches the touch panel 21 based on a detection signal output from the touch panel 21. The position calculation unit 23 calculates a contact position on the touch panel 21 based on the detection result by the contact position detection unit 22, and outputs the calculated contact position to the display controller 18.

  Next, the display controller 18 will be described. FIG. 4 is a block diagram showing the configuration of the display controller 18. As shown in FIG. 4, the display controller 18 includes a video signal switching / combining unit 181, an audio signal switching unit 182, and a shutter driving unit 183.

  The video signal switching / synthesizing unit 181 receives video signals from the navigation device 12 and the DVD playback device 13 and synthesizes either one of the video signals or a signal obtained by synthesizing those video signals according to the setting by the user from the touch panel or the like. Is transmitted to the liquid crystal display panel 19. In addition, the video signal switching / synthesizing unit 181 outputs a control signal corresponding to the switching and synthesis of the video signal to the audio signal switching unit 182 and the shutter driving unit 183.

  The audio signal switching unit 182 inputs audio signals from the navigation device 12 and the DVD playback device 13, and sends either or both to the audio device 14 based on the control signal output from the video signal switching / synthesizing unit 181. .

  The shutter drive unit 183 receives the first signal of the viewing angle control shutter 20 according to the control signal output from the video signal switching / combination unit 181 and the signal output from the stop state detection sensor 12 or the seating detection sensor 17. A first drive signal S1 for driving the shutter unit 20a, a second drive signal S2 for driving the second shutter unit 20b, and a signal S3 for driving the third shutter unit 20c are output.

  The audio device 14 switches between an audio signal from the navigation device 12 or the DVD playback device 13 given via the display controller 18 and an audio signal from a CD player, a radio tuner, or the like built in the audio device 14. The audio signal output from the audio device 14 is supplied to the speaker 16 via the amplifier 15.

  FIG. 5 is a schematic diagram showing the configuration of the viewing angle control shutter. In FIG. 5, an area corresponding to one pixel of the liquid crystal display panel 19 is enlarged. As shown in FIG. 5, the viewing angle control shutter 20 is disposed on the transparent glass substrates 31 and 35, the liquid crystal 33 sealed between these substrates 31 and 35, the lower surface side of the glass substrate 31, and the upper surface side of the glass substrate 35. The polarizing plates 36 and 37, and the microprisms 38a and 38b disposed on the polarizing plate 37, are disposed on the liquid crystal display panel 19 (on the display surface).

  The area corresponding to one pixel of the liquid crystal display panel 19 is divided into two areas 30 a and 30 b having substantially the same size in the viewing angle control shutter 20. A transparent electrode 32a made of ITO (indium tin oxide) or the like is provided on the surface (upper surface) of the substrate 31 on the liquid crystal 33 side. The transparent electrode 32a is formed only on the region 30a side, and is not formed on the region 30b side.

  On the surface (lower surface) of the substrate 35 on the liquid crystal 33 side, a transparent common electrode 34 made of ITO or the like having the same size as the display area of the liquid crystal display panel 19 is provided. These electrodes 32a and 34 and the liquid crystal 33 between the electrodes 32a and 34 constitute a shutter cell.

  Each shutter cell of the first shutter unit 20a (see FIG. 2) is driven by a first drive signal S1 output from the display controller 18, and each shutter cell of the second shutter unit 20b is output from the display controller 18. Driven by the second drive signal S2, and each shutter cell of the third shutter section 20c is driven by the third drive signal S3 output from the display controller 18.

  Each of the microprisms 38 a and 38 b has a right-angled triangle cross section, and is disposed back to back on the polarizing plate 37. The microprism 38a is disposed on the region 30a side, and the microprism 30b is disposed on the region 30b side.

  In the viewing angle control shutter 20 configured as described above, the light transmitted through the pixels of the liquid crystal display panel 19 passes between the polarizing plates 36 and 37 when no voltage is applied between the electrodes 32 a and 34. Thus, the microprisms 38a and 38b are reached. The light on the region 30a side is refracted by the microprism 38a and travels toward the driver's seat. The light on the region 30b side is refracted by the microprism 38b and travels toward the passenger seat. Therefore, at this time, the same image can be seen on the driver's seat side and the passenger seat side.

When a predetermined voltage is applied between the electrode 32a and the electrode 34, the direction of liquid crystal molecules between the electrodes 32a and 34 changes, and light is blocked in the region 30a.
Accordingly, the driver seat side cannot see the image displayed on the liquid crystal display panel 19. On the other hand, since light is transmitted between the polarizing plates 36 and 37 on the region 30b side, an image displayed on the liquid crystal display panel 19 can be seen on the passenger seat side.

  The operation of the AV / car navigation system configured as described above will be described below. FIG. 6 is a diagram showing a screen of the display device viewed from the driver seat side and the passenger seat side when the vehicle is stopped. FIG. 7 is a diagram illustrating a screen of the display device viewed from the driver's seat side during traveling. FIG. 8 is a diagram showing a screen of the display device viewed from the passenger seat side during traveling. FIG. 9 is a diagram showing a DVD playback screen of the display device viewed from the passenger seat side during traveling. FIG. 10 is a diagram showing a DVD playback screen of the display device viewed from the driver's seat side during traveling.

  When the stop state detection sensor 11 detects that the vehicle is in a stop state, the display controller 18 always keeps the viewing angle control shutters 20a, 20b, and 20c in an off state (no voltage applied). In this state, the display controller 18 transmits one of the video signals from the navigation device 12 and the DVD playback device 13 or a signal obtained by synthesizing these video signals to the liquid crystal display panel 19 in accordance with a user setting. .

  Therefore, when the vehicle is stopped, the map display portion (A), the destination setting button, and the telephone call button output from the navigation device 12 are displayed not only in the passenger seat but also in the driver seat as shown in FIG. The displayed menu button display part (B), the current position display, and the menu button display part (C) on which the return button is displayed can be seen.

  As a result, it is possible to set a destination and make a call by operating the buttons displayed on the menu button display part (B) from either the driver side or the passenger side, and the menu button display part. By operating the button displayed in (C), it is possible to return to the current location display and the previous screen.

  When the vehicle is moving, the display controller 18 uses the signal from the stop state detection sensor 19 so that the menu button display portion (B) cannot be seen from the driver's seat. 2 is turned on. Thereby, as shown in FIG. 7, the menu button display part (B) with the destination setting button and the telephone call button cannot be viewed from the driver's seat side.

  For this reason, while the vehicle is moving, it is possible to operate the buttons displayed in the menu button display part (C) from the driver's seat side, but search by operating the buttons displayed in the menu button display part (B). I cannot make calls or make calls. While the vehicle is moving, the function from the driver's seat side can be restricted.

  On the other hand, on the passenger seat side, even when the vehicle is running, as shown in FIG. 8, the map display part (A), menu button display part (B), menu button display part output from the navigation device 12 You can see all of (C). For this reason, even if the function is limited to the driver, the function can be performed from the passenger seat side.

  When a movie played on the DVD playback device 13 is viewed in the full screen display mode while the vehicle is running, the display controller 18 uses the first shutter unit 20a, the second shutter unit 20b, and the third shutter unit 20 of the viewing angle control shutter 20. The shutter unit 20c is driven.

  Accordingly, as shown in FIG. 9, on the passenger seat side, the DVD playback screen display part (A), the DVD playback screen display part (B), and the DVD playback image display part (C) can all be viewed. A movie played on a DVD playback device can be viewed in full screen display mode.

  On the other hand, on the driver's seat side, as shown in FIG. 10, the display controller 18 turns on the first shutter unit 20 a, the second shutter unit 20 b, and the third shutter unit 20 c of the viewing angle control shutter 20. Therefore, the DVD playback screen display part (A) and the DVD playback image display parts (B) and (C) cannot all be viewed. For this reason, movies cannot be viewed from the driver's seat.

  As described above, in this embodiment, the display controller 18 controls the viewing angle control shutter 20 according to the output of the stop state detection sensor 19 and the outputs of the navigation device 12 and the DVD playback device 13, so that the vehicle The menu display area for operating functions that the driver should not perform while driving is visible from the passenger side and not from the driver side. While restricting the functions that can be operated, the convenience of the passenger seat can be improved.

  The viewing angle control shutter is not limited to that shown in FIG. 5 and may be configured as follows. FIG. 11 is a schematic diagram showing another configuration of the viewing angle control shutter. As shown in FIG. 11, the viewing angle control shutter 42 is disposed on the front surface of the liquid crystal display panel 19 and includes a plurality of shutter cells corresponding to the respective pixels of the liquid crystal display panel 19. Reference numeral 21 denotes a touch panel.

  In the shutter cell, the liquid crystal molecules 43 can be tilted in a certain direction by applying a voltage between a pair of electrodes (not shown) arranged with the liquid crystal in between. Thus, in a state where the liquid crystal molecules 43 are aligned in a certain direction, the light traveling in the major axis direction of the liquid crystal molecules 43 is transmitted through the viewing angle control shutter 42 and the light traveling in the minor axis direction of the liquid crystal molecules 43 is viewed. It is blocked by the angle control shutter 42. As a result, it is possible to prevent the image displayed on the liquid crystal display panel 19 from being seen from the passenger seat side and from being seen from the driver seat side. Each shutter cell of the viewing angle control shutter 42 can be individually controlled by the shutter driving unit 183 of the display controller 18 as described above.

  FIG. 12 is a schematic diagram showing another configuration of the viewing angle control shutter. A viewing angle control shutter 63 is disposed between the liquid crystal display panel 61 and the backlight 62. The viewing angle control shutter 63 includes a plurality of cylindrical lenses 71 and a plurality of shutter cells 72 arranged side by side.

  When the shutter cell 72 is in the off state, the light emitted from the backlight 62 is split by the cylindrical lens 71 into light directed toward the driver seat and light directed toward the passenger seat. Then, these lights pass through the liquid crystal display panel 61 and proceed to the passenger seat side and the driver seat side, and images displayed on the liquid crystal display panel 61 can be seen on both the driver seat side and the passenger seat side.

  The shutter cell 72 includes a pair of transparent electrodes and a liquid crystal between the transparent electrodes. These shutter cells 72 are disposed in a light path toward the driver's seat, and no shutter cells are provided in the light path toward the passenger seat. Therefore, if the light directed toward the driver's seat is blocked by the shutter cell 72, the driver's seat has the liquid crystal display panel 61 on the driver's seat even when the image displayed on the liquid crystal display panel 61 can be viewed. The displayed image cannot be viewed.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible. For example, in the above embodiment, the shutter drive unit is realized by the display controller 18 in the display device 10 as shown in FIG. 4, but the present invention is not limited to this, for example, in the navigation device 12. It may be realized by a controller or the like. The viewing angle control shutter is not limited to the configuration shown in FIGS.

1 is a block diagram of an AV / car navigation system. FIG. 2 is a diagram showing a liquid crystal display panel, a viewing angle control shutter, and a touch panel 21. FIG. It is a figure for demonstrating the position detection by a touch panel. It is a block diagram which shows the structure of a display controller. It is a schematic diagram which shows the structure of a viewing angle control shutter. It is a figure which shows the screen of the display apparatus seen from the driver's seat side at the time of a stop, and a passenger seat side. It is a figure which shows the screen of the display apparatus seen from the driver's seat side at the time of driving | running | working. It is a figure which shows the screen of the display apparatus seen from the passenger seat side at the time of driving | running | working. It is a figure which shows the DVD reproduction screen of the display apparatus seen from the passenger seat side at the time of driving | running | working. It is a figure which shows the DVD reproduction screen of the display apparatus seen from the driver's seat side at the time of driving | running | working. It is a schematic diagram which shows the other structure of a viewing angle control shutter. It is a schematic diagram which shows the other structure of a viewing angle control shutter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 AV car navigation system 10 Display apparatus 11 Stop state detection sensor 12 Navigation apparatus 13 DVD reproducing apparatus 14 Audio apparatus 17 Seating detection sensor 18 Display controller 19 Liquid crystal display panel 20 View angle control shutter 21 Touch panel 181 Video signal switching composition part 182 Audio signal Switching unit 183 Shutter drive unit

Claims (5)

A display unit;
A first state in which a predetermined operation menu display area displayed in at least a part of the display area of the display unit can be viewed from both the first and second directions, and the first and second directions A viewing angle control shutter that can be switched to a second state that can be viewed only in either one of
A vehicle stop state detector that detects whether the vehicle is in a stop state; and
When the vehicle stop state detection unit detects the vehicle stop state, the viewing angle control shutter is switched to the first state, and when the vehicle stop state detection unit does not detect the vehicle stop state, the vehicle driver And a shutter drive unit that switches the viewing angle control shutter to a second state that can be viewed only in the second direction . The display device according to claim 1, further comprising a touch panel provided corresponding to the operation menu display area. The display device changes the viewing angle control shutter to a mode for switching to the first state or the second state in accordance with an output from a seating detection sensor for detecting seating on a seat. The display device according to claim 1 or 2. A display unit;
A first state in which a predetermined operation menu display area displayed in at least a part of the display area of the display unit can be viewed from both the first and second directions, and the first and second directions A viewing angle control shutter that can be switched to a second state that can be viewed only in either one of
A vehicle stop state detector that detects whether the vehicle is in a stop state; and
When the vehicle stop state detection unit detects the vehicle stop state, the viewing angle control shutter is switched to the first state, and when the vehicle stop state detection unit does not detect the vehicle stop state, the vehicle driver A shutter drive unit that switches the viewing angle control shutter to a second state that can be seen only in the second direction, where the direction in which
A navigation system comprising: The navigation system further includes a seating detection sensor that detects seating on the seat,
5. The navigation system according to claim 4 , wherein the shutter driving unit changes the viewing angle control shutter to a mode for switching to the first state or the second state according to an output of the seating detection sensor. .

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