JP2020032863A - Electronic mirror device, display switching control method and display switching control program - Google Patents

Abstract

To provide an electronic mirror device that prevents deterioration in visibility when a displayed view is switched to another view.SOLUTION: An electronic mirror device 100 includes: a mirror body 120 in which a display device 130 and a half mirror 140 are disposed; an operation lever 150 for changing a posture of the mirror body 120; and a selector switch 160 for detecting a position of the operation lever 150. When the mode of the electronic mirror device 100 is switched from a display mode to a mirror mode, the display device 130 displays a black image without being turned off.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electronic mirror device in which an optical mirror is combined with a display device such as a liquid crystal display, and more particularly, to control of switching from display using an optical mirror to display using a liquid crystal display.

  In recent years, an electronic mirror device combining a half mirror and a liquid crystal display has become widespread. The electronic mirror device allows the driver to visually recognize the rear of the vehicle projected on the optical mirror or to visually recognize the image of the imaging camera displayed on the liquid crystal display. Switching between the display by the optical mirror and the display by the liquid crystal display is performed, for example, by operating an operation lever attached to the electronic mirror device.

  Patent Literature 1 discloses a vehicle inner mirror system including a display device and a half mirror. This mirror system includes a mirror body in which a display device and a half mirror are incorporated, an operation lever member for changing the attitude of the mirror body, and a power switch for turning on or off the display device in conjunction with operation of the operation lever member. And

Patent No. 5929509

  FIGS. 8A and 8B are a plan view showing a schematic configuration of a conventional electronic mirror device disclosed in Patent Document 1, and a cross-sectional view taken along line AA thereof. The electronic mirror device 1 is configured such that a liquid crystal display (LCD) 3 and a half mirror 4 are arranged inside a housing of a vehicle mirror main body 2, and the attitude of the vehicle mirror main body 2 is changed by an operation lever member 5. Have been. When the operation lever member 5 is moved to the rear side as shown in FIG. 8A, the operation lever member 5 is separated from the power switch 6, and the power to the liquid crystal display 3 and the imaging camera (not shown) is turned off, and the operation is started. The driver can visually recognize the rear of the vehicle projected on the half mirror 4. When the operation lever member 5 is moved to the near side as shown in FIG. 8B, the operation lever 5 comes into contact with the power switch 6, and the power to the liquid crystal display 3 and the imaging camera is turned on. An image behind the vehicle captured by the image capturing camera is displayed at 3. At this time, since the half mirror 4 is tilted so that the ceiling of the vehicle is reflected, the light reflected by the half mirror 4 is less likely to travel in the line of sight of the driver, and is thereby displayed on the liquid crystal display 3. The visibility of the resulting image is improved. In the following description, for convenience, a display mode in which the reflected image by the half mirror 4 is visually recognized is referred to as a mirror mode, and a display mode in which the image displayed on the liquid crystal display 3 is visually recognized is referred to as a display mode.

  As described above, in the conventional electronic mirror device, when the display is switched from the display mode to the mirror mode, the power switch 6 is turned off. Therefore, when switching from the mirror mode to the display mode, the power of the liquid crystal display 3 must be turned on again. However, as a result, the activation process of the liquid crystal display 3 is required, and a delay occurs until the image is displayed on the liquid crystal display 3. That is, as shown in FIG. 8C, the liquid crystal display 3 is off in the mirror mode, and when the power switch 6 is turned on by the operation lever member 5 at time T1, the signal processing device for driving the liquid crystal display 3 And an activation time Td until the electronic circuit and the like are activated, and an image is displayed on the liquid crystal display 3 at time T2. Therefore, during the period from time T1 to T2, the image on the liquid crystal display 3 is not displayed, and the visibility of the electronic mirror device is reduced.

  The present invention solves such a conventional problem, and provides an electronic mirror device, a display switching control method, and a display switching control program which prevent a decrease in visibility when switching of display is performed. Aim.

  An electronic mirror device according to the present invention includes a display unit that displays an image, a mirror main body in which an optical member that transmits part of light and reflects part of light is disposed, and an image displayed by the display unit. Switching means for enabling switching between a first display mode for enabling visual recognition of the first image or a second display mode for enabling visual recognition of a reflected image by the optical member, and the display in response to switching of the switching means. Control means for controlling means, wherein the control means controls the display means so that when the display mode is switched from the first display mode to the second display mode, a reflected image by the optical member can be visually recognized. Display a specific image.

  In one embodiment, the specific image is a monochrome image. In one embodiment, the specific image is a black monochrome image. In one embodiment, the display unit includes at least a liquid crystal panel and a backlight, and the control unit displays a specific image on the liquid crystal panel when the display mode is switched from the first display mode to the second display mode. Display and reduce the brightness of the backlight. In one embodiment, the control means minimizes the brightness of the backlight. In one embodiment, the liquid crystal panel is a normally black type that presents a black screen when power is turned off, and the control unit displays a black image equivalent to normally black on the liquid crystal panel. Let it. In one embodiment, the specific image includes a combination of a monochrome image and another image. In one embodiment, the other image includes a character, a graphic, or a symbol for identifying that the image is the second display mode. In one embodiment, the other image includes information on a driving state. In one embodiment, the specific image is displayed on a central portion of the display device, and the other image is displayed on a peripheral portion of the display device. In one embodiment, the switching means includes an operation lever attached to the mirror main body, and switches to the first display mode when the operation lever is at the first position, and the operation lever is at the second position. At this time, the display is switched to the second display mode. In one embodiment, the switching means further includes a switch that is turned on / off in accordance with the position of the operation lever, and switches to the first display mode or the second display mode in accordance with the on / off state of the switch. In one embodiment, the switching means sets the mirror main body or the optical member to the first position when the operation lever is at the first position, and sets the mirror main body or the optical member when the operation lever is at the second position. The optical member is in a second position. In one embodiment, the switching means includes a receiving means for receiving a switching control signal from the outside, wherein the switching means switches to a first display mode when the switching control signal indicates a first state; When the control signal indicates the second state, the display mode is switched to the second display mode. In one embodiment, the switching means includes input means for receiving an instruction from a user, wherein the switching means switches to a first display mode when the instruction from the user indicates a first state, and issues an instruction from the user. Switch to the second display mode when indicates the second state. In one embodiment, the switching unit includes a sensor that detects a position of the mirror body or the optical member, and the switching unit detects a first position of the mirror body or the optical member by the sensor. Then, the display is switched to the first display mode, and when the second position of the mirror body or the optical member is detected by the sensor, the display mode is switched to the second display mode. In one embodiment, when the control unit is switched from the second display mode to the first display mode, the control unit displays, on the display unit, an image of a vehicle rear image captured by an imaging camera without activating the display unit. Is displayed. In one embodiment, the optical member is a half mirror.

  The display switching control method according to the present invention includes a display unit that displays an image, a mirror main body in which an optical member that transmits a part of the light and reflects a part of the light is disposed, and the display unit displays the image. Switching means for enabling switching between a first display mode for enabling visual recognition of an image or a second display mode for enabling visual recognition of a reflected image by the optical member; and the switching means in response to switching of the switching means. Control means for controlling a display means, wherein the control means, when switched from the first display mode to the second display mode, allows the reflected image by the optical member to be visually recognized. A specific image is displayed on the display means so that it becomes possible.

  A display switching control program according to the present invention includes a display unit that displays an image, a mirror body that internally includes an optical member that transmits a part of light and reflects a part of the light, and a display unit that is displayed by the display unit. Switching means for enabling switching between a first display mode for enabling visual recognition of an image or a second display mode for enabling visual recognition of a reflected image by the optical member; and the switching means in response to switching of the switching means. Control means for controlling a display means, wherein the control means, when switched from the first display mode to the second display mode, allows the reflected image by the optical member to be visually recognized. The display switching program is executed so as to display a specific image on the display means so as to be enabled.

  According to the present invention, when the display mode is switched from the first display mode to the second display mode, the display image of the display unit is controlled so that the reflected image by the optical member can be visually recognized. Therefore, it is not necessary to perform the activation process of the display means when switching from the second display mode to the first display mode, and it is possible to prevent a decrease in visibility at the time of display switching.

FIG. 1 is a diagram illustrating a schematic configuration of an electronic mirror device according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating an electrical configuration of the electronic mirror device according to the embodiment of the present invention. It is a figure showing the functional composition of the display change control program concerning an example of the present invention. 6 is a flowchart illustrating an operation of the electronic mirror device according to the embodiment of the present invention. 6 is a timing chart of display switching in the electronic mirror device according to the embodiment of the present invention. FIG. 9 is a diagram illustrating another display example of the electronic mirror device according to the embodiment of the present invention. FIG. 11 is a block diagram illustrating an electrical configuration of an electronic mirror device according to another embodiment of the present invention. FIG. 9 is a diagram for explaining a problem of a conventional electronic mirror device.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the drawings are emphasized for easy understanding of the invention, and do not necessarily represent the scale of an actual device.

  FIG. 1 is a diagram showing a schematic configuration of an electronic mirror device according to an embodiment of the present invention. As shown in FIG. 1A, the electronic mirror device 100 of this embodiment is mounted near the ceiling of the vehicle, and the driver U can visually recognize the rear of the vehicle with the electronic mirror device 100. 1B and 1C are schematic longitudinal sectional views (corresponding to a section taken along the line AA in FIG. 8) of the electronic mirror device 100. FIG. 1B shows that the electronic mirror device 100 is in a mirror mode. FIG. 1C shows a state in which the electronic mirror device 100 is in a display mode.

  The electronic mirror device 100 includes a support member 110 fixed to a ceiling of a vehicle, and a mirror main body 120 rotatably attached to the support member 110 via a rotation shaft 112 such as a hinge. The mirror main body 120 is a housing having a rectangular internal space with one open side, in which a display device 130 and a half mirror 140 are arranged in front of the display device 130. It is exposed from the open side of the body. An opening 122 is formed in a lower portion of the mirror main body 120, and one end of the operation lever 150 protrudes from the opening 122. The other end of the operation lever 150 is connected to the rotation shaft 112, and by rotating one end of the operation lever 150 around the rotation shaft 112 within the range of the opening 122, the rotation of the operation lever 150 causes the mirror body 120 to rotate. You can change your posture.

  As shown in FIG. 1B, when one end of the operation lever 150 is moved to the farthest side, the mirror main body 120 causes the light reflected by the half mirror 140 to be directed substantially in the line of sight of the driver U. And the electronic mirror device 100 is in the mirror mode. Also, as shown in FIG. 1C, when one end of the operation lever 150 is moved to the foremost, the mirror main body 120 displays the half mirror 140 in the ceiling direction, and the reflected light is reflected in the line of sight of the driver U. And the angle or posture is such that the image displayed by the display device 130 is directed substantially toward the driver's U line of sight via the half mirror 140, and the electronic mirror device 100 enters the display mode. Note that the mutual positional relationship between the display device 130 and the half mirror 140 disposed in the mirror main body 120 is adjusted in advance so that the image in the mirror mode and the display mode is appropriately directed in the line of sight of the driver U. You.

  A changeover switch 160 is mounted on the rear surface of the display device 130 at a position facing the operation lever 150. The changeover switch 160 is a switch that is turned on or off in conjunction with the movement of the operation lever 150. When the operation lever 150 is moved to the back side, the operation lever 150 is separated from the changeover switch 160, and the changeover switch 160 is turned off. I do. When the operation lever 150 is moved to the front, the operation lever 150 comes into contact with the changeover switch 160, and the changeover switch 160 is turned on.

  FIG. 2A is a block diagram illustrating an electrical configuration of the electronic mirror device 100 according to the embodiment of the present invention. As shown in the figure, the electronic mirror device 100 includes a display device 130, a changeover switch 160, an imaging camera 170, and a power supply unit 180.

  The imaging camera 170 is installed inside or outside the vehicle so as to image the rear and side of the vehicle. The imaging data I captured by the imaging camera 170 is provided to the display device 130 via a wired or wireless connection.

  The power supply unit 180 provides the power PWR supplied from the ACC power supply or the battery to the display device 130, the changeover switch 160, and the imaging camera 170. The changeover switch 160 detects the position of the operation lever 150 as described above, and when the changeover switch 160 is turned on, for example, an H level detection signal D, and when the changeover switch 160 is turned off, for example, an L level detection signal, D is provided to the display device 130.

  The display device 130 is, for example, a liquid crystal display device, and includes a liquid crystal panel 132, a backlight 134, and a control unit 136. The liquid crystal panel 132 and the backlight 134 have a size corresponding to the internal space of the housing of the mirror main body 120. The liquid crystal panel 132 is of a normally black type, and the display screen turns black when the power is turned off. An electronic circuit or the like constituting the control unit 136 is mounted on, for example, a circuit board, and the circuit board is mounted on a board that supports the liquid crystal panel 132 and the backlight 134.

  The control unit 136 includes an electronic circuit and the like for controlling the liquid crystal panel 132 and the backlight 134. The electronic circuit includes a circuit that receives image data I from the image capturing camera 170, an image processing circuit that performs image processing on the received image data I, and a drive circuit that drives the liquid crystal panel 132 and the backlight 134. Further, in one aspect, the control unit 136 includes a central processing unit (CPU) and a microcontroller such as a ROM / RAM, and controls each unit by executing a program stored in the ROM / RAM.

  When power PWR is supplied from power supply unit 180, control unit 136 executes a power-up sequence, resets programs and registers, and is placed in an operable state after executing these activation processes.

  The control unit 136 determines the mirror mode or the display mode based on the detection signal D from the changeover switch 160, and controls the display device 130 according to the mirror mode or the display mode. When the electronic mirror device 100 is in the display mode, the control unit 136 receives the imaging data I from the imaging camera 170, performs desired processing such as trimming on the received imaging data I, and displays the processed imaging data on a liquid crystal panel. 132 is displayed. Further, the control unit 136 may control the luminance of the backlight 134 according to, for example, an instruction from a user or, when an illuminance sensor is mounted, according to an output of the sensor.

  On the other hand, when the electronic mirror device 100 is switched to the mirror mode, the control unit 136 stops receiving the imaging data I from the imaging camera 170, and instead, displays a specific image on the liquid crystal panel 132, for example, a black monochrome image. Display the image. Further, the control unit 136 controls the brightness of the backlight 134 to a minimum. For example, when the luminance of the backlight is controlled by PWM, the duty ratio is controlled so that the on-time is minimized.

  What is characteristic in this embodiment is that when the electronic mirror device 100 switches from the display mode to the mirror mode (when the changeover switch 160 switches from on to off), the power PWR to the display device 130 is continued. The liquid crystal panel 132 displays black without turning off the circuit power of the display device 130. Displaying black on the liquid crystal panel 132 is substantially equivalent to displaying on the normally black liquid crystal panel 132, and the driver U can visually recognize the rear of the vehicle reflected by the half mirror 140. As described above, when the display mode is switched from the display mode to the mirror mode, the function as the mirror mode is realized while the operation state of the display device 130 is maintained. It is possible to eliminate display loss or display delay at the time of switching and prevent a decrease in visibility without performing a start-up process when the power of the apparatus 130 is turned on.

  Next, details of the electronic mirror device will be described. In one preferred embodiment, the control unit 136 executes a switching control program for controlling the operation of the display device 130 in response to switching from the mirror mode to the display mode or from the display mode to the mirror mode.

  FIG. 3 shows a functional configuration of the display switching control program according to the present embodiment. The display switching control program 200 includes a switching detection unit 210 that detects a detection signal D from the changeover switch 160, and a switching that determines switching from the display mode to the mirror mode or switching from the mirror mode to the display mode based on the detection signal D. A determination unit 220; a display image control unit 230 that controls an image displayed on the liquid crystal panel 132 based on the determination result of the switching determination unit 220; and a brightness that controls the brightness of the backlight 134 based on the determination result of the switching determination unit 220. And a control unit 240.

  Next, the operation of the electronic mirror device will be described with reference to the flow of FIG. When the engine of the vehicle is started or when the ACC power is turned on, power PWR is supplied from the power supply unit 180 to the display device 130, the changeover switch 160, and the imaging camera 170 (S100). The control unit 136 starts the startup process in response to the input of the power PWR (S110). This allows the display device 130 to operate. Further, the imaging camera 170 is also activated, and thereafter becomes operable. In the above method, power is directly supplied from the power supply unit 180 to the changeover switch 160 and the imaging camera 170. However, the activated control unit 136 supplies power to the changeover switch 160 and the imaging camera 170. It may be.

  Next, the switching detection unit 210 detects the detection signal D from the changeover switch 160 (S120), and the switching determination unit 220 determines switching to the display mode or switching to the mirror mode based on the detection signal D. (S130). If it is determined that the display mode is to be switched to the display mode (S140), the display image control unit 230 causes the liquid crystal panel 132 to display the image data I of the rear of the vehicle imaged by the imaging camera 170 (S150). Further, the brightness control section 240 drives the backlight 134 at a predetermined brightness. Thus, the driver can visually recognize the image data I behind the vehicle displayed on the liquid crystal panel 132 via the half mirror 140.

  On the other hand, if it is determined that the mode is to be switched to the mirror mode (S160), the display image control unit 230 stops displaying the image data by the imaging camera 170, and instead displays black on the liquid crystal panel 132 (S170). . For example, the display image control unit 230 previously stores image data to be displayed on the liquid crystal panel 132 in the mirror mode in a memory or the like. Further, the brightness control unit 240 drives the backlight 134 so that the brightness becomes minimum (S180). For example, the brightness control unit 240 stores brightness data for controlling the brightness of the backlight in the mirror mode in a memory or the like in advance. By displaying the liquid crystal panel 132 in black, the back side of the half mirror 140 is darker than the front side, so that the driver can visually recognize the image behind the vehicle reflected by the half mirror 140.

  FIG. 5 shows a timing chart of display switching in the electronic mirror device. At time T1, when the display mode is switched to the mirror mode, the power of the display device 130 is not turned off, a black image is displayed on the liquid crystal panel 132, and the brightness of the backlight 134 is minimized. At time T2, when the mode is switched from the mirror mode to the display mode, the imaging data I is immediately displayed on the liquid crystal panel 132 without the start-up processing of the display device 130. Thereby, when switching the display from the mirror mode to the display mode, it is possible to eliminate the display loss or the display delay due to the power activation process and improve the visibility.

  In the above-described embodiment, an example in which black is displayed on the liquid crystal panel 132 has been described. However, this is merely an example. For example, the liquid crystal panel 132 may be displayed in a brown color close to black or another dark single color. In short, the image on the liquid crystal panel 132 may be controlled so that the back side of the half mirror 140 is darker than the front side. Further, the image data representing the black color displayed on the liquid crystal panel 132 may be adjusted so as to be equivalent to the normally black color of the liquid crystal panel.

  In the above embodiment, the brightness of the backlight 134 is minimized when the mode is switched to the mirror mode. However, this is an example, and since the light from the backlight 134 is sufficiently blocked by the image display on the liquid crystal panel 132, If so, the brightness need not necessarily be minimum. However, minimizing the luminance is desirable for suppressing power consumption.

  In the above embodiment, the position of the operation lever 150 is detected by the changeover switch 160, but this is an example. For example, as shown in FIG. The position may be detected.

  Next, a modification of the embodiment of the present invention will be described. In the above embodiment, a black image is displayed on the entire surface of the liquid crystal panel 132 when the mode is switched to the mirror mode. However, the control unit 136 may display a combination of a plurality of images on the liquid crystal panel 132. . That is, since the area visually recognized by the driver is the central area of the electronic mirror device, it is sufficient that the reflected image behind the vehicle can be visually recognized in the central area. Therefore, a black image may be displayed in the central area of the liquid crystal panel 132, and another image may be displayed in other peripheral portions.

  FIG. 6A schematically illustrates a display example of a liquid crystal panel, and FIG. 6B schematically illustrates a reflection image projected on the half mirror 140. As shown in FIG. 6A, a black image is displayed in the central area 132A of the liquid crystal panel 132, and another image is displayed in the peripheral area 132B. Other images are optional, for example, other images may include information indicating that the mode has been switched to the mirror mode, information regarding the traveling state of the own vehicle, or information indicating that a vehicle exists behind the own vehicle. For example, the information may include characters, graphics, or symbols. When the display control is performed in this manner, as shown in FIG. 6B, a reflection image of the rear of the vehicle is displayed in the central area 142A of the half mirror 140, and other information is displayed in the peripheral area 142B. You. This allows the driver to simultaneously view the information on driving assistance at the same time as viewing the vehicle direction.

  Next, another embodiment of the present invention will be described with reference to FIG. In the above embodiment, the switching between the mirror mode and the display mode is performed in conjunction with the operation lever 150. In other embodiments, the switching between the mirror mode and the display mode is realized without using the operation lever. The electronic mirror device 100A illustrated in FIG. 7A includes a user input unit 310 that receives a switching instruction from a user. The form of the user input unit 310 is arbitrary and not particularly limited. For example, an input button for selecting one state from two states is provided on the mirror main body 120, or the electronic mirror device 100 and the navigation device are connected to each other. It is electrically connected and a switching instruction is input using a user input of the navigation device, or a mobile terminal such as a smart phone and an electronic mirror device are electrically connected wirelessly or the like, and the user input of the mobile terminal is input. A switching instruction may be input by utilizing this.

  The electronic mirror device 100 further includes a switching signal transmitting / receiving unit 320 that receives an instruction from the user input unit 310, and the switching signal transmitting / receiving unit 320 generates a switching signal D corresponding to the mirror mode or the display mode based on the switching instruction from the user. The information is transmitted to the control unit 136. The control unit 136 controls the display device 130 based on the received switching signal D in the same manner as in the above embodiment. In the case of this example, the attitude of the mirror main body 120 is not changed. However, if it is desired to change the attitude of the mirror main body 120, the operation lever 150 may be attached to the mirror main body 120 as in the above embodiment. In this case, it should be noted that, unlike the above embodiment, switching between the mirror mode and the display mode is not performed in conjunction with the operation lever 150.

  When the user wants to change the attitude of the mirror main body 120 in response to a switching instruction from the user without using the operation lever, as shown in FIG. An actuator unit 330 for changing the posture of the camera may be included. The actuator section 330 includes, for example, a motor connected to the rotating shaft 112 shown in FIG. 1, and can change the attitude of the mirror main body 120 to the mirror mode or the display mode by rotating the motor. In this case, when receiving the switching signal from the switching signal transmitting / receiving unit 320, the control unit 136 controls the rotation of the motor based on the switching signal.

  In the above embodiment, an example in which the electronic mirror device is applied to a room mirror installed inside a vehicle has been described. However, the electronic mirror device of the present invention can also be applied to a door mirror or a fender mirror installed outside a vehicle. In the above embodiment, an example in which a liquid crystal panel is used as a display device has been described. However, this is an example, and the display device uses another display medium (for example, an organic EL panel). Is also good. When the display device does not require a backlight as in the case of the organic EL panel, the control unit displays a specific image (for example, black) on the organic EL panel when the display device is switched to the mirror mode, and controls the organic EL panel. Can be controlled to minimize the brightness of the image. Further, in the above-described embodiment, the half mirror is exemplified. However, as long as the optical member transmits a part of light and reflects a part of the light, the transmittance and the reflectance may not be necessarily equal.

  As described above, the preferred embodiments of the present invention have been described in detail, but the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the invention described in the claims. Changes are possible.

100: Electronic mirror device 110: Support member 112: Rotating shaft 120: Mirror body 122: Opening 130: Display device 132: Liquid crystal panel 134: Backlight 140: Half mirror 150: Operation lever 160: Changeover switch 170: Imaging camera 180: Power supply

Claims (20)

Display means for displaying an image, and a mirror body in which an optical member that transmits some light and reflects some light is disposed,
Switching means for enabling switching between a first display mode for enabling visual recognition of an image displayed by the display means or a second display mode for enabling visual recognition of a reflected image by the optical member;
Control means for controlling the display means in response to switching of the switching means,
An electronic mirror device that, when switched from the first display mode to the second display mode, causes the display unit to display a specific image so that a reflected image by the optical member can be visually recognized; . The electronic mirror device according to claim 1, wherein the specific image is a monochrome image. The electronic mirror device according to claim 2, wherein the specific image is a black monochrome image. The display means includes at least a liquid crystal panel and a backlight,
4. The control means according to claim 1, wherein when the display mode is switched from the first display mode to the second display mode, a specific image is displayed on the liquid crystal panel and the brightness of the backlight is reduced. An electronic mirror device according to one of the preceding claims. The electronic mirror device according to claim 4, wherein the control unit minimizes the brightness of the backlight. The liquid crystal panel is a normally black type that presents a black screen when the power is turned off,
The electronic mirror device according to claim 5, wherein the control unit causes the liquid crystal panel to display a black image equivalent to black of normally black. The electronic mirror device according to claim 1, wherein the specific image includes a combination of a monochrome image and another image. The electronic mirror device according to claim 7, wherein the other image includes a character, a graphic, or a symbol for identifying that the image is in the second display mode. The electronic mirror device according to claim 7, wherein the other image includes information on a traveling state. The electronic mirror device according to any one of claims 7 to 9, wherein the specific image is displayed on a central portion of the display device, and the other image is displayed on a peripheral portion of the display device. The switching means includes an operation lever attached to the mirror main body, and switches to a first display mode when the operation lever is at the first position, and displays a second display when the operation lever is at the second position. The electronic mirror device according to claim 1, wherein the electronic mirror device is switched to an aspect. 12. The switching device according to claim 11, wherein the switching unit further includes a switch that is turned on / off in accordance with the position of the operation lever, and switches to the first display mode or the second display mode in accordance with the on / off state of the switch. Electronic mirror device. The switching means sets the mirror body or the optical member to the first position when the operation lever is at the first position, and moves the mirror body or the optical member to the first position when the operation lever is at the second position. The electronic mirror device according to claim 11, wherein the electronic mirror device has a second posture. The switching means includes a receiving means for receiving a switching control signal from the outside, wherein the switching means switches to a first display mode when the switching control signal indicates a first state, and the switching control signal is a second display mode. The electronic mirror device according to claim 1, wherein the display mode is switched to the second display mode when the state is displayed. The switching means includes an input means for receiving an instruction from a user, wherein the switching means switches to a first display mode when the instruction from the user indicates a first state, and the instruction from the user is in a second state. 2. The electronic mirror device according to claim 1, wherein the display mode is switched to the second display mode when representing the following. The switching means includes a sensor that detects a position of the mirror body or the optical member, and the switching means performs a first display when the sensor detects a first position of the mirror body or the optical member. 2. The electronic mirror device according to claim 1, wherein the electronic mirror device switches to a second display mode when the sensor detects a second position of the mirror body or the optical member. 3. The control unit, when switched from the second display mode to the first display mode, causes the display unit to display an image behind the vehicle captured by an imaging camera without activating the display unit. Item 2. The electronic mirror device according to item 1. The electronic mirror device according to claim 1, wherein the optical member is a half mirror. Display means for displaying an image, a mirror main body in which an optical member that transmits some light and reflects some light is disposed, and a first body that enables an image displayed by the display means to be visually recognized. A switching unit that enables switching of a display mode or a second display mode that allows a reflected image to be visually recognized by the optical member; and a control unit that controls the display unit in response to switching of the switching unit. A display switching control method for an electronic mirror device,
A display switching control unit that, when switched from the first display mode to the second display mode, causes the display unit to display a specific image so that a reflected image by the optical member can be visually recognized. Method. Display means for displaying an image, a mirror main body in which an optical member that transmits some light and reflects some light is disposed, and a first body that enables an image displayed by the display means to be visually recognized. A switching unit that enables switching of a display mode or a second display mode that allows a reflected image to be visually recognized by the optical member; and a control unit that controls the display unit in response to switching of the switching unit. A display switching control program for an electronic mirror device,
The control means, when switched from the first display mode to the second display mode, performs the display so as to display a specific image on the display unit so that a reflected image by the optical member can be visually recognized. A display switching control program that executes the switching program.

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