JP5769503B2 - Image display apparatus and program - Google Patents

Description

  The present invention relates to an image display device capable of selectively displaying a three-dimensional image with the naked eye, and more particularly to an image display device mounted on a vehicle.

  A moving body such as an automobile is equipped with a display device that displays navigation images, television images, Internet images, DVD images, and the like, and provides information necessary for driving and provides passengers with entertainment information. The in-vehicle display device is usually installed in front of the interior space of the vehicle, but it is not preferable for safe driving that the driver sees an image other than the navigation image during traveling. For this reason, Patent Document 1 discloses a display device that separately displays an image that can be viewed by a driver and an image that can be viewed by a passenger in a passenger seat.

  In recent years, a technique for displaying a three-dimensional image in a game machine or the like is becoming popular. The three-dimensional display generally uses a method using parallax. For example, Patent Document 2 discloses a car navigation device equipped with a liquid crystal display device capable of displaying a stereoscopic image and simultaneously displaying a plurality of images. FIG. 1 is a diagram illustrating a configuration of a liquid crystal display device that displays a stereoscopic image of Patent Document 2. As illustrated in FIG. The liquid crystal display device includes first and second light sources 1a and 1b, a light guide plate 2, a double-sided prism sheet 3, and a transmissive display panel 4. Light from the first light source 1a is transmitted through the light guide plate 2. The light incident from the incident end face 2a, the light from the second light source 1b incident from the incident end face 2b of the light guide plate 2, and the light repeatedly reflected within the light guide plate 2 are emitted from the output face 2c to the double-sided prism sheet 3 Is incident on. A triangular prism array 3a is formed on the incident surface of the double-sided prism sheet 3, and a cylindrical lens array 3b is formed on the output surface. The light emitted from the light sources 1a and 1b has angles corresponding to left and right parallaxes, respectively. The transmissive display panel 4 emits a different image in the left-right direction and allows a stereoscopic image to be displayed.

JP 2005-165228 A JP 2005-266293 A

  Since the three-dimensional display can provide a real image and a high-impact image, it is expected to be used for movies, shopping and advertisement images. Three-dimensional displays include those using dedicated 3D glasses and those using the naked eye using parallax. While the 3D display with the naked eye is comfortable and comfortable for the user, it causes a load or burden on the user's eyes. For this reason, when a display device that displays a three-dimensional image is used in an in-vehicle device, the burden on the eyes of the driver or passenger is reduced to a minimum when switching from the three-dimensional display to the two-dimensional display. Is desirable. It is also desirable to minimize the load on the eyes when the driver or passenger sees the real world from a three-dimensional display virtual society. In particular, when watching a three-dimensional display for a long time, it is necessary to become accustomed to see the real world.

  It is an object of the present invention to provide an image display device that can display a three-dimensional image that solves the above-described conventional problems and reduces the burden on the eyes of the user.

  An image display device that can be mounted on a vehicle according to the present invention includes a display unit that can perform two-dimensional display or three-dimensional display, a determination unit that determines whether or not the vehicle shifts from a stopped state to a traveling state, Control means for controlling the display means to switch from the three-dimensional display to the two-dimensional display when it is determined by the determination means to shift from the stop state to the running state.

  Preferably, the image display device further includes reception means for receiving information from the outside, and the determination means determines to shift from the stop state to the running state based on the information received by the reception means. Preferably, the information from the outside includes operation information of traffic lights at intersections, and the determination means determines to shift from a stop state to a travel state based on waiting time information until the traffic light changes from a red signal to a green signal. Preferably, the determination means determines to shift from the stopped state to the traveling state before a certain time before the red signal changes to the green signal. Preferably, the information from the outside includes movement information of a preceding vehicle in a congested vehicle train, and the determination unit determines to shift from a stopped state to a traveling state based on the movement information. Preferably, the control means controls stepwise switching from a three-dimensional display to a two-dimensional display or from a two-dimensional display to a three-dimensional display.

  An image display device that can be mounted on a vehicle according to the present invention includes: a display unit that can perform two-dimensional display or three-dimensional display; a determination unit that determines whether or not a destination has been reached; and the display unit. Control means for controlling, when the control means is determined to arrive at the destination by the determination means when displaying an image for a passenger other than the driver during a three-dimensional display, Switch from 3D display to 2D display. Preferably, the display means is capable of three-dimensional display with the naked eye using a parallax barrier.

  The program according to the present invention is executed by an image display device including a display unit capable of performing two-dimensional display or three-dimensional display, and determines whether or not the vehicle shifts from a stopped state to a traveling state. And a step of controlling the display means to switch from the three-dimensional display to the two-dimensional display when it is determined to shift from the stopped state to the traveling state.

  According to the present invention, when it is determined to shift from the stopped state to the running state, the user can switch from the three-dimensional display to the two-dimensional display, so that the user can get used to before seeing the real society, The burden on the eyes can be reduced. In particular, by ending the three-dimensional display before the start of traveling, it is possible to promote the switching of the eyes or the brain from the three-dimensional display to the real society and to ensure safe driving.

It is a figure which shows the structure of the image display apparatus mounted in the vehicle which can display the conventional stereo image. It is a block diagram which shows the structure of the image display apparatus which concerns on preferable embodiment of this invention. Sectional drawing which shows the structural example of the display part shown in FIG. 1 is a block diagram illustrating a configuration of an image display device according to a first embodiment of the present invention. It is a block diagram which shows the structure of the image display apparatus which concerns on the 5th Example of this invention. It is a flowchart explaining the display switching operation | movement which concerns on 1st Example of this invention. It is a figure which shows the display switching timing of the 1st thru | or 4th Example of this invention. It is a figure explaining the display switching which concerns on 3rd Example of this invention. It is a flowchart explaining the display switching operation | movement which concerns on the 4th Example of this invention. It is a flowchart explaining the display switching operation | movement which concerns on the 5th Example of this invention. It is a block diagram which shows the structure of the 6th Example of this invention. It is a flowchart explaining the display switching operation | movement which concerns on the 6th Example of this invention. It is a figure which shows the structural example of the electronic device to which the image display apparatus of this invention is applied.

  Next, an embodiment of the present invention will be described. The image display device according to the embodiment of the present invention is preferably mounted on a moving body such as a vehicle, and performs three-dimensional display or stereoscopic display with the naked eye in the space of the moving body. In addition, the image display device is used as an image display medium for other electronic devices mounted on the moving body, for example, a navigation device, an audio / video device, a television receiver, and an information terminal device.

  FIG. 2 is a block diagram showing the configuration of the image display apparatus according to the preferred embodiment of the present invention. The image display apparatus 100 according to the present embodiment includes a vehicle state determination unit 110 that determines the state of the vehicle, a display unit 120 that can perform two-dimensional display or three-dimensional display, and an input unit 130 that receives input from the user. And an image source unit 140 that supplies image data to be displayed on the display unit 120, and a controller 150 that controls each unit.

  The vehicle state determination unit 110 determines whether or not the own vehicle shifts from the running state to the stopped state, on the contrary, whether or not the vehicle shifts from the stopped state to the running state, or whether the vehicle ahead of the own vehicle is stopped. Etc. are determined. The vehicle state determination unit 110 uses, for example, information indicating a vehicle state such as a vehicle speed sensor mounted on the vehicle, parking brake on or off, road traffic information acquired from the outside, or imaging. Detection information from cameras and millimeter wave radar can be used. Furthermore, road map data included in the navigation device can also be used.

  In a preferred aspect, when the host vehicle is stopped at an intersection, the vehicle state determination unit 110 determines the timing at which the host vehicle shifts from the stop state to the traveling state based on the operation information of the traffic light received from the outside. In another preferable aspect, when the host vehicle is stopped due to traffic jam, the vehicle status determination unit 110 determines the timing at which the host vehicle shifts from the stopped state to the running state based on traffic jam information received from the outside. In a more preferable aspect, the vehicle state determination unit 110 determines the timing at which the host vehicle transitions from the stop state to the travel state based on detection information from an obstacle detection unit such as millimeter wave radar, infrared rays, or an imaging camera.

  The display unit 120 can perform two-dimensional display or three-dimensional display of the image supplied from the image source unit 140. In a preferred embodiment, the display unit 120 enables three-dimensional display with the naked eye. The human recognizes the image stereoscopically by the brain processing the difference between the left and right images (binocular parallax) and recognizing the depth. That is, stereoscopic display can be performed by delivering a right-eye image only to the right eye and a left-eye image only to the left eye.

  As is known in the art, an integral imaging method and a parallax barrier method are known for three-dimensional display with the naked eye. In the integral imaging method, a liquid crystal panel is arranged behind a lenticular sheet in which countless fine lenses are arranged. The parallax barrier method delivers different images to the left and right eyes by arranging a fine vertical stripe-shaped light blocking object (liquid crystal shutter or the like) on a panel. Switching between the three-dimensional display and the two-dimensional display can be easily realized by switching the liquid crystal shutter that constitutes the light shield.

  FIG. 3 shows an example of a parallax barrier type liquid crystal panel constituting the display unit 120. The liquid crystal panel 200 includes a polarizing plate 202 that transmits linearly polarized light from a backlight device serving as a light source, a TFT substrate (active thin film transistor substrate) 204, a liquid crystal layer 206, a color filter substrate 208, a parallax barrier 210, glass, and the like. A substrate 212 and a polarizing plate 214 are included.

As for the light from the backlight device, only light of a specific linearly polarized light is transmitted by the polarizing plate 202, and the transmitted light is modulated by the liquid crystal layer 206 driven by the transistor of the TFT substrate 204, and is transmitted to the color filter substrate 208. Incident. The color filter substrate 208 arranges color filters of three primary colors of RGB (red, green, and blue), and one pixel is formed by RGB. The parallax barrier 210 is a panel disposed on the color filter substrate 208, and includes a light blocking unit 210a that blocks light and a light transmitting unit 210b that transmits light. A plurality of light shielding portions 210a and light transmitting portions 210b are alternately arranged in every other row, and the pitch between the light shielding portions 210a and the light transmitting portions 210b corresponds to the arrangement pitch of the color filters R, G, and B. From each translucent section 210b, R, G, B light in the right eye direction of the observer is emitted in the visual field direction V1, and at the same time, R, G, B light in the left eye direction is emitted in the visual field direction V2. . The visual field barrier 210 is made of liquid crystal, and can be switched to an on state in which the light shielding unit 210a shields light or an off state in which light is transmitted by applying a voltage to an electrode corresponding to the light shielding unit 210a. Switching of the light shielding unit 210a is performed by a switching control signal from the controller 150. When the display unit 120 displays a three-dimensional image, the light shielding unit 210a is in a light-shielding state and displays a two-dimensional image. The light shielding portion 210a is in a light transmitting state.

  The input unit 130 constitutes a user interface between the user and the image display apparatus 100. The input unit 130 can receive, for example, an instruction for selecting an image source to be displayed, an instruction for switching between two-dimensional display or three-dimensional display, and the like from the user.

  The image source unit 140 provides or generates image data to be displayed on the display unit 120. The image source unit 140 is, for example, a navigation image that is a road map around the vehicle position, an image reproduced from a storage medium such as a DVD, or an image received by television broadcasting in accordance with a user selection from the input unit 130 I will provide a. In addition, when an instruction to perform three-dimensional display is given from the controller 150, the image source unit 140 is an image for three-dimensional display, that is, an image for the right eye and an image for the left eye according to the parallax. An image can be generated.

  The controller 150 is configured using, for example, a control device such as a central processing unit, a central processing processor, a microcomputer, a microprocessor, or a processing processor. Preferably, the controller 150 stores a display switching program for switching between three-dimensional display or two-dimensional display in a memory, and controls the display unit 120 and the image source unit 140 by executing the program.

Next, a first embodiment of the image display apparatus of this embodiment will be described. Figure 4 A shows a configuration of an image display device 100A according to the first embodiment are denoted by the same numerals for the same configuration as FIG. In the first embodiment, the image display device 100A includes an external information acquisition unit 160 that acquires information on road traffic from the outside of the host vehicle. The external information acquisition unit 160 acquires real-time road traffic information using optical beacons and wireless communication, as represented by driving safety support systems (DSSS). DSSS uses light beacons placed at intersections and major roads to provide real-time road traffic information to vehicles passing through them. For example, when there is a traffic light ahead of a vehicle entering an intersection, and the traffic light is a red signal or a blue signal, information such as a waiting time until the vehicle changes to a green light when the signal is a red signal is provided. In addition, for a vehicle that enters the forward traffic jam, information on the distance to the traffic jam, information on whether or not the front of the traffic jam has started moving, and the like are provided. The external information acquisition unit 160 may acquire information from, for example, VICS (registered trademark) , DSRC, smart way, the Internet, and the like in addition to DSSS and decode it.

Based on the information acquired by the external information acquisition unit 160, the vehicle state determination unit 110 determines whether the vehicle is traveling or stopped, whether the vehicle transitions from the stopped state to the traveling state, or whether the vehicle is in the traveling state. to determine the constant depending on the purpose or the like whether to shift to the stopped state from. The determination result is provided to the controller 150, and the controller 150 switches between three-dimensional display and two-dimensional display based on this information.

  FIG. 5 is a flowchart for explaining display switching of the image display apparatus according to the first embodiment. Here, it is assumed that an image for the driver is displayed. The image display device 100A causes the image selected by the user to be output from the image source unit 140 and displayed on the display unit 120. However, since it is dangerous to show the driver a three-dimensional image while driving, A two-dimensional image is displayed (S101). The vehicle state determination unit 150 determines whether or not the host vehicle is traveling using information such as a vehicle speed sensor. While the host vehicle is traveling, the controller 150 turns off the light shielding portion 210a of the visual field barrier 210 via the switching control signal (in other words, sets the light shielding state), so that the display unit 120 can display a two-dimensional image. To. Also, normal image data is provided from the image source unit 140 to the display unit 120.

  When the own vehicle passes the vicinity of the intersection, the external information acquisition unit 160 receives the operation information of the traffic light from the optical beacon installed before the intersection (S102). Traffic signal operation information includes the presence of a traffic signal at the intersection ahead, traffic signal status (red signal, green signal, right turn signal, etc.), waiting time when the signal is red (time to change from red signal to green signal) Etc. The external information acquisition unit 160 temporarily stores the received operation information, decodes the operation information (S103), and provides the decoding result to the vehicle state determination unit 110.

  Next, the vehicle state determination unit 110 receives the operation information, determines whether or not the intersection signal is a red signal (S104), and if it is a red signal, the vehicle waits for a red signal or a blue signal. The remaining time is counted down (S105). For example, if the waiting time for a red light is 1 minute 20 seconds, the vehicle state determination unit 110 counts down 1 minute 20 seconds in 1 second units using a built-in timer or the like.

  Next, the vehicle state determination unit 150 determines whether or not the own vehicle has stopped (S106). Whether or not the vehicle has stopped can be determined using, for example, a vehicle speed sensor. If it is determined that the host vehicle has stopped, the controller 150 switches the display from the two-dimensional display to the three-dimensional display (S107). That is, the image source unit 140 divides the selected image into a left-eye image and a right-eye image, and provides them to the display unit 120. Further, the light shielding unit 210 a of the visual field barrier 210 is brought into a light shielding state by a switching control signal from the controller 150. When the vehicle stops in this way, a stereoscopic image is displayed on the display unit 120, and the driver can see the stereoscopic image with the naked eye.

  Further, the vehicle state determination unit 110 monitors whether or not the counted down value of the waiting time of the red signal has reached a certain value (S108), and when the counted down value reaches the certain value, notifies the controller 150 of the result. . The constant value is, for example, several seconds before the red signal changes to the blue signal, or several seconds before the blue signal lights up, and this time is set in advance. When the controller 150 receives notification that the predetermined value has been reached, the controller 150 controls the display unit 120 and the image source unit 140 to switch the display from the three-dimensional image to the two-dimensional image (S109). That is, switching from the three-dimensional image to the two-dimensional image is performed before the time when the host vehicle starts to travel. As a result, the 3D image is finished before the start of driving, and the driver can obtain a preparation period for promoting switching of eyes or brain before seeing the real society, and at the same time, see the 2D image. This reduces the burden on the eyes.

  FIG. 6A shows the timing of display switching according to the first embodiment. At time T1, traffic signal operation information is received. At this time, since the display unit 120 is traveling, the two-dimensional display remains. When the vehicle stops at a red signal at time T2, the display unit 120 is switched from the two-dimensional display to the three-dimensional display. While the vehicle is stopped, the three-dimensional display is continued, but at time T3, when a certain time before the start of traveling is reached, that is, when the traveling start is predicted, the display unit 120 switches from the three-dimensional display to the two-dimensional display. It is done. At time T4, the traffic light changes from a red signal to a green signal, and the host vehicle starts to travel. Thus, when shifting from the stopped state to the traveling state, a preparation period for viewing the real society is provided, and the burden on the eyes of the driver can be reduced.

  FIG. 6B shows the display switching timing of the second embodiment. In the first embodiment, when shifting from the stopped state to the traveling state, the display is switched from the three-dimensional display to the two-dimensional display. However, in the second embodiment, the image display on the display unit 120 is deleted. As a result, the burden on the driver's eyes can be reduced. Also, instead of erasing all the images, only the images that do not need to be viewed while driving (for example, TV images or movies) are deleted, and the navigation images that may be viewed while driving are not deleted. Good.

  Next, a third embodiment of the present invention will be described. In the first embodiment, at time T3, when the fixed time before the start of traveling, that is, when the waiting time of the red signal reaches a certain value, the display is switched from the three-dimensional display to the two-dimensional display. In the third embodiment, By performing this switching step by step, the burden on the driver's eyes is minimized. FIG. 7A shows a switching control signal given to the light shielding unit 210a in the first embodiment. When the switching control signal is logic high, the light shielding unit 210a is light shielding on, and when the switching control signal is logic low, the light shielding unit 210a is light shielding off.

  On the other hand, in the third embodiment, as shown in FIG. 7B, the switching control signal is changed using a plurality of pulses to shift from the logic high to the logic low. Thereby, the switching from the three-dimensional display to the two-dimensional display becomes stepwise, and the load on the eyes of the driver can be minimized. Further, when switching from the two-dimensional display to the three-dimensional display at time T2 in FIGS. 6A to 6C, the switching control signal is changed stepwise as shown in FIG. 7C. Also good.

  FIG. 7D shows a modification of the third embodiment. When the light-shielding part 210a of the visual field barrier 210 is switched from on to off, the luminance of the display unit 210 is gradually decreased (either linear or stepwise), and the luminance is gradually increased from the time of switching. Also good. Such display switching can reduce the burden on the eyes. The change in luminance may be a combination with FIGS. 7 (a) to 7 (c). In this case, the inflection point of the luminance is made to coincide with the timing at which the switching control signal changes, or is made coincident within a period in which the stepwise change is performed.

  Next, a fourth embodiment of the present invention will be described. The fourth embodiment relates to display switching when stopped due to a traffic jam, and the operation flow is shown in FIG. While the host vehicle is traveling, a two-dimensional display is displayed on the display unit 120 (S201). If there is a traffic jam ahead of the vehicle during traveling, the traffic jam information is received as road traffic information such as DSSS (S202). The traffic jam information includes, for example, the presence of a traffic jam train ahead, the distance or time to the traffic jam train, the presence / absence of movement in the traffic jam train, and the like.

  The external information acquisition unit 160 temporarily stores the received traffic jam information, decodes the traffic jam information (S203), and provides the decoded result to the vehicle state determination unit 110. The vehicle state determination unit 110 monitors whether or not the own vehicle has stopped due to traffic jam (S204), and if it is determined that the own vehicle has stopped, the controller 150 switches from the two-dimensional display to the three-dimensional display (S205). ). The external information acquisition unit 160 continuously receives the latest traffic jam information, and determines whether or not the front of the traffic jam train has started moving based on the traffic jam information (S206). If it is determined that the front of the traffic jam column has started moving, the determination result is transmitted to the controller 150, and the controller 150 switches the display on the display unit 120 from the three-dimensional display to the two-dimensional display (S207). Thereafter, the vehicle starts to travel.

  FIG. 6D shows the display switching timing of the fourth embodiment. At time T1, the own vehicle stops in the congested vehicle train, and in response to this, the two-dimensional display is switched to the three-dimensional display. In response to receiving the forward movement of the congested vehicle train at time T2, the display is switched from the three-dimensional display to the two-dimensional display, and the vehicle starts to travel at time T3.

  Next, a fifth embodiment of the present invention will be described. FIG. 4B shows the configuration of the image display device 100B of the fifth embodiment. The fifth embodiment includes an obstacle detection unit 170 that detects an obstacle such as a vehicle existing in front of the host vehicle. The obstacle detection unit 170 detects the distance and the moving direction to the obstacle ahead of the host vehicle by receiving reflected light from the obstacle ahead of the host vehicle using millimeter wave radar, infrared rays, or the like. Can do. The obstacle detection unit 170 detects the distance to the obstacle and the moving direction by imaging the front of the vehicle with an imaging camera and recognizing an obstacle such as a vehicle displayed on the obstacle. Also good. The detection result detected by the obstacle detection unit 170 is provided to the vehicle state determination unit 110 and is used for determination of the traveling state of the host vehicle.

  The display switching when the host vehicle is stopped in the congested vehicle train shown in FIG. 6D can also be performed using the fifth embodiment. FIG. 9 is a flowchart for explaining the operation of the fifth embodiment. As described above, the image for the driver is displayed two-dimensionally while traveling (S301), and when it is detected that the host vehicle has stopped (S302), the display unit 120 responds to the two-dimensional display. The display is switched to the three-dimensional display (S303). In the fifth embodiment, in response to the stop of the host vehicle, the obstacle detection unit 170 detects an obstacle existing in front of the host vehicle (S304). In the detection information, the distance to the vehicle ahead of the host vehicle is detected. Moreover, when a vehicle is detected by the imaging camera, lighting information of a brake lamp of the vehicle may be included as detection information. The obstacle detection unit 170 provides the latest detection result to the vehicle state determination unit 110 at a constant cycle.

  The vehicle state determination unit 110 determines whether the obstacle has moved based on the detection result (S305). For example, when the distance of the obstacle detected this time becomes larger than the distance to the obstacle detected last time, or when the brake lamp of the vehicle ahead changes from the lit state to the unlit state, Is determined to have moved or moved. When it is determined that there is an obstacle moving, the controller 150 switches the display on the display unit 120 from the three-dimensional display to the two-dimensional display (S306).

  Next, a sixth embodiment of the present invention will be described. The first to fifth embodiments mainly perform display switching of an image for a driver, but the sixth embodiment has an image for a passenger seat or a rear seat (referred to as a passenger image). The display is switched. In the sixth embodiment, it is assumed that the image display device 100 is applied to a navigation device 300 as shown in FIG. FIG. 11 is a flowchart for explaining the display switching operation of the sixth embodiment.

  The destination is set by the user (S401), and the vehicle starts traveling according to the guidance route to the destination. The controller 150 causes the display unit 120 to three-dimensionally display the passenger image during traveling (S402). When the navigation device 300 determines that the host vehicle has arrived at the destination (or waypoint), the controller 150 switches the passenger image on the display unit 120 from the three-dimensional display to the two-dimensional display based on the determination result. (S404). Since the passenger needs to see the real world outside the vehicle by arriving at the destination, the burden on the passenger's eyes can be reduced by switching to the two-dimensional display in advance.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the specific embodiment, and various modifications can be made within the scope of the present invention described in the claims. Deformation / change is possible.

  For example, the image display device 100 of the present invention can be applied to a part of an electronic device 400 as shown in FIG. The electronic device 400 includes a navigation device 300, a television receiver 310, and an audio / video (AV) playback device 320, and the image source unit 140 selectively selects images from the navigation device 300, the television receiver 310, and the AV playback device 320. The data is provided to the display unit 120, and the display unit 120 performs three-dimensional display or two-dimensional display with the naked eye. The first to sixth embodiments described above may be implemented independently, or may be implemented by appropriately combining the first to sixth embodiments.

100, 100A: Image display device 110: Vehicle information determination unit 120: Display unit 130: Input unit 140: Image source unit 150: Controller 160: External information acquisition unit 170: Obstacle detection unit 200: Liquid crystal panel 202: Polarizing plate 204 : TFT substrate 206: Liquid crystal layer 208: Color filter substrate 210: Field barrier 210 a: Light shielding part 210 b: Translucent part 212: Glass substrate 214: Polarizing plate

Claims (9)

An image display device that can be mounted on a vehicle,
Display means capable of performing two-dimensional display or three-dimensional display;
Receiving means for receiving the operation information of the traffic lights at the intersection from the outside;
Determining means for determining whether or not to shift from the stop state to the traveling state based on waiting time information until the traffic light included in the operation information changes from a red signal to a green signal ;
Control means for controlling the display means so as to switch from three-dimensional display to two-dimensional display when it is determined by the determination means to shift from the stopped state to the running state;
An image display apparatus. The image display device according to claim 1 , wherein the determination unit determines to shift from the stopped state to the traveling state before a certain time before the red signal changes to the blue signal. An image display device that can be mounted on a vehicle,
Display means capable of performing two-dimensional display or three-dimensional display;
A receiving means for receiving movement information of a preceding vehicle in a congested vehicle train from outside;
Determining means for determining whether or not to shift from a stopped state to a traveling state based on the movement information ;
Control means for controlling the display means so as to switch from three-dimensional display to two-dimensional display when it is determined by the determination means to shift from the stopped state to the running state;
An image display apparatus. Wherein the control means controls the phased switching of the two-dimensional display from the three-dimensional display, or from the two-dimensional display to three-dimensional display, the image display apparatus according to 3 any one claims 1. It said display means is capable of three-dimensional display by naked eye using a parallax barrier, an image display apparatus according to 4 any one claims 1. A program executed by the control means in an image display device comprising display means capable of performing two-dimensional display or three-dimensional display and control means for controlling the display means ,
A reception step of receiving the operation information of the traffic light at the intersection from the outside;
Determining whether or not to transition from a stopped state to a traveling state based on waiting time information until the traffic light included in the operation information changes from a red signal to a green signal ;
Controlling the display means to switch from a three-dimensional display to a two-dimensional display when it is determined to shift from a stopped state to a traveling state;
A program with The program according to claim 6 , wherein the determining step determines that the vehicle shifts from the stop state to the traveling state before a certain time before the red signal changes to the green signal. A program executed by the control means in an image display device comprising display means capable of performing two-dimensional display or three-dimensional display and control means for controlling the display means ,
A reception step of receiving movement information of a preceding vehicle in a congested vehicle train from the outside;
Determining whether to shift from a stopped state to a traveling state based on the movement information ;
Controlling the display means to switch from a three-dimensional display to a two-dimensional display when it is determined to shift from a stopped state to a traveling state;
A program with The program according to any one of claims 6 to 8 , wherein the controlling step controls stepwise switching from a three-dimensional display to a two-dimensional display or from a two-dimensional display to a three-dimensional display.

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