JP2017047804A - Mirror device and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mirror device with a display function capable of easily achieving a glare-proof function without adding a configuration.SOLUTION: A mirror device 1 includes: a display panel 14; a half mirror 12 disposed on a display surface side of the display panel 14; a first light quantity sensor 13 for detecting light quantity of external light irradiated on the half mirror 12; and a display control section 22 for turning on the display panel 14 when the light quantity of the external light detected by the first light quantity sensor 13 is a prescribed first threshold or more. The display control section 22 turns on the display panel 14 with light quantity smaller than light quantity of the external light reflected by the half mirror 12.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a mirror device and a control method thereof, for example, a vehicle mirror device having an antiglare function and a control method thereof.

  A room mirror is generally installed in the vehicle interior to allow the driver to visually recognize the rear of the vehicle. When driving at night, the light from the headlight of the following vehicle is reflected by the room mirror, and the reflected light enters the eyes of the driver. Patent Documents 1 and 2 disclose a mirror device having an antiglare function for preventing a driver from being dazzled by reflected light.

  In the mirror device described in Patent Document 1, a mirror including an EC (Electrochromic) element is provided in order to reduce glare that a driver feels. The EC element changes the reflectance of the mirror and switches between the anti-glare state and the non-glare state. In addition, a liquid crystal display device for displaying various information around the vehicle is provided on the rear surface of the mirror. Various displays are executed by the liquid crystal display device in a state where the anti-glare control of the EC element is stopped.

  The mirror device described in Patent Document 2 includes a liquid crystal cell disposed between a polarizing plate and a reflective polarizing plate. Switching between anti-glare and non-glare states by controlling the application of voltage to the liquid crystal cell to change the alignment characteristics of the liquid crystal and changing the transmittance of the light reflected by the reflective polarizing plate .

JP 2010-173460 A JP 2009-008882 A

  In the electronic mirror having both the mirror function and the display function described in Patent Document 1, a mirror having an antiglare structure is provided on the display surface side of the display device. Moreover, in patent document 2, it is necessary to arrange | position the element which can change light distribution characteristics and the transmittance | permeability, such as a liquid crystal cell, as an anti-glare structure. Such an antiglare structure is complicated and expensive.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a mirror device having a display function that can easily realize an anti-glare function without adding a configuration. It is.

  A mirror device according to an embodiment includes a display panel, a half mirror disposed on a display surface side of the display panel, a first light amount detection unit that detects a light amount of external light applied to the half mirror, A display control unit that turns on the display panel when the amount of the external light detected by the first light amount detection unit is equal to or greater than a predetermined first threshold value.

  According to the embodiment, it is possible to provide a mirror device having a display function that can easily realize an anti-glare function without adding a configuration.

1 is a diagram illustrating a schematic configuration of a mirror device according to Embodiment 1. FIG. It is typical sectional drawing of the II-II line | wire of FIG. 1 is a block diagram illustrating a configuration of a mirror device according to a first embodiment. 3 is a flowchart illustrating a processing procedure of the mirror device according to the first embodiment. It is a figure explaining the state which the headlight of the succeeding vehicle reflected in the mirror apparatus of the comparative example. It is a figure which shows the state which the headlight of the succeeding vehicle of FIG. 5 reflected. In the mirror device according to Embodiment 1, it is a diagram illustrating a state in which the headlight of the following vehicle is reflected. It is a figure which shows the state which the headlight of the succeeding vehicle of FIG. 7 reflected. FIG. 6 is a block diagram showing a configuration of a mirror device according to a second embodiment. 6 is a flowchart illustrating a processing procedure of the mirror device according to the second embodiment. FIG. 6 is a block diagram illustrating a configuration of a mirror device according to a third embodiment. FIG. 10 is a diagram for explaining a state in which a headlight of a succeeding vehicle is reflected in the mirror device according to the third embodiment. 10 is a flowchart illustrating a processing procedure of the mirror device according to the third embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. Specific numerical values and the like shown in the following embodiments are merely examples for facilitating understanding of the invention, and are not limited thereto unless otherwise specified. Note that, in each drawing, the same element is denoted by the same reference numeral, and redundant description is omitted as necessary.

  Embodiments relate to a mirror device for a vehicle having an antiglare function. The mirror device according to the embodiment is used as a room mirror of a vehicle, and is an electronic mirror having a mirror function for enabling the vehicle rear to be visually recognized and a display function for displaying various information.

Embodiment 1 FIG.
The mirror device 1 according to Embodiment 1 will be described with reference to the drawings. FIG. 1 is a diagram illustrating a schematic configuration of the mirror device 1. FIG. 1 shows a front view of the mirror device 1. FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. In FIG. 2, the first light quantity sensor 13 viewed from the line II-II in FIG. 1 is illustrated. FIG. 3 is a block diagram illustrating a configuration of the mirror device 1 according to the first embodiment. The mirror device 1 is installed in a vehicle interior and is used as a room mirror that enables a driver to visually recognize the rear of the vehicle.

  As shown in FIGS. 1 and 2, the mirror device 1 includes a housing 11, a half mirror 12, a first light quantity sensor 13, and a display panel 14. As illustrated in FIG. 3, the mirror device 1 includes a mirror unit 10 and a control unit 20 that controls the mirror unit 10 and the like. The mirror unit 10 includes a half mirror 12, a first light amount sensor 13, and a display panel 14. The control unit 20 includes a photographing control unit 21, a display control unit 22, and a light amount detection control unit 23.

  The casing 11 is a shallow box whose longitudinal direction is arranged along the vehicle width direction of the vehicle. The surface disposed on the vehicle rear side of the housing 11 is open. Although not shown here, the housing 11 is rotatably supported at the end of the stay, and is attached to the upper end of the windshield in the vehicle interior or the vehicle front side of the roof via the stay.

  As shown in FIG. 2, a half mirror 12 and a display panel 14 are disposed inside the housing 11. The half mirror 12 and the display panel 14 have a substantially rectangular plate shape. The housing 11 has an opening that matches the outer shape of the half mirror 12 and the display panel 14. The outer periphery of the half mirror 12 is held by the housing 11. The half mirror 12 is arranged in a state where the mirror surface 15 on the front side is exposed to the outside through the opening of the housing 11. That is, the mirror surface 15 is disposed toward the vehicle rear side.

  A display panel 14 is disposed on the back side (vehicle front side) of the half mirror 12. The half mirror 12 is disposed on the display surface side of the display panel 14. In the example shown in Embodiment 1, the display panel 14 is a liquid crystal display panel including a liquid crystal panel 16 and a backlight 17. A backlight 17 is disposed on the opposite side of the liquid crystal panel 16 from the half mirror 12. The liquid crystal panel 16 performs gradation display by controlling the transmittance of light from the backlight 17. The backlight 17 has a general configuration including, for example, a light source such as an LED and a cold cathode tube, a light guide plate, a diffusion plate, and the like. Note that the display panel 14 is not limited to this, and for example, a self-luminous display panel such as an organic EL panel may be used.

  An imaging unit 30 fixed to the vehicle is connected to the imaging control unit 21. The imaging unit 30 captures the rear of the vehicle. The imaging control unit 21 transmits display data to the display control unit 22 based on the imaging data captured by the imaging unit 30. The display control unit 22 controls gradation display on the display panel 14 based on the display data. Thereby, the information behind the vehicle from the imaging unit 30 is displayed on the display panel 14.

  The display panel 14 displays information outside the vehicle such as weather information and traffic information transmitted by radio waves. The half mirror 12 can reflect light incident from the front side (left side in FIG. 2) and transmit light from the display panel 14. Therefore, the driver can visually recognize information displayed on the rear side of the vehicle and the display panel 14 using the half mirror 12.

  The display control unit 22 can switch between a display mode in which information is displayed on the display panel 14 and a mirror mode in which information is not displayed on the display panel 14. In the display mode, the backlight 17 is lit, and the image captured by the imaging unit 30 is displayed on the display panel 14. The user (driver) can visually check the rear image of the vehicle displayed on the display panel 14 via the half mirror 12.

  In the mirror mode, the backlight 17 of the display panel 14 is not turned on, and the video imaged by the imaging unit 30 is not displayed on the display panel 14. The user (driver) can check the back by reflecting the half mirror 12 in the same manner as a general mirror type room mirror.

  The first light amount sensor 13 detects the amount of external light irradiated on the half mirror 12. The first light quantity sensor 13 is arranged at a position where it can receive external light irradiated on the half mirror 12. In the example shown in FIG. 1, the first light quantity sensor 13 is disposed in the vicinity of the center of the long side of the half mirror 12 on the upper side of the half mirror 12 of the housing 11. The light receiving surface of the first light quantity sensor 13 is arranged in substantially the same direction as the mirror surface 15. Note that the arrangement position of the first light quantity sensor 13 is not limited to the example shown in FIG. 1 as long as the quantity of external light applied to the mirror surface 15 can be detected.

  The light amount detection control unit 23 determines whether or not the amount of external light detected by the first light amount sensor 13 is equal to or greater than a predetermined first threshold value. Here, the 1st light quantity sensor 13 and the light quantity detection control part 23 are equivalent to the 1st light quantity detection part as described in a claim. Note that the first threshold value can be the amount of light when the headlight of the rear vehicle is directly applied to the half mirror 12.

  In the mirror device 1 according to the embodiment, the driver is prevented from being dazzled by the reflected light of the headlight of the following vehicle by utilizing the characteristics of the human eye such as adaptation and simultaneous contrast. Adaptation is a mechanism in which the eyes adapt to the light of the environment in the human eye. If the entire half mirror 12 is as bright as possible, even if the light from the headlight is reflected, it is difficult for the driver to feel dazzling. Simultaneous contrast is a phenomenon in which the perceived brightness looks different depending on the surrounding brightness even if the brightness is the same. The brightness of the headlight light perceived by the driver changes depending on the surrounding brightness.

  In order to use the characteristics of these two human eyes, the display control unit 22 turns on the display panel 14 when the amount of external light detected by the first light amount sensor 13 is equal to or greater than a predetermined first threshold value. . For example, when the detected amount of external light is equal to or greater than the first threshold value, the light amount detection control unit 23 outputs a control signal for changing the lighting state of the display panel 14 to the display control unit 22. The display control unit 22 drives the display panel 14 according to the control signal. Thereby, the whole half mirror 12 becomes bright, and even if the light of the headlight is reflected by the half mirror 12, it is difficult to feel dazzling.

  Here, with reference to FIG. 4, the control method of the mirror apparatus 1 which concerns on Embodiment 1 is demonstrated. FIG. 4 is a flowchart showing a processing procedure of the mirror device 1. As shown in FIG. 4, first, the amount of external light applied to the half mirror 12 is detected, and it is determined whether the detected amount of external light is greater than or equal to a predetermined first threshold value (step S11). When the detected amount of external light is not greater than or equal to the first threshold (NO in step S11), the display panel 14 is not turned on and the process ends.

  On the other hand, when external light having a light quantity equal to or greater than the first threshold is detected (YES in step S11), it is determined whether the display panel 14 is in the mirror mode (step S12). When the display panel 14 is in the mirror mode (step S12 YES), the backlight 17 of the display panel 14 is not lit and no display is made. In this case, the display panel 14 is turned on (step S13), and the entire half mirror 12 is brightened. At this time, the display control unit 22 turns on the display panel 14 with a light amount that is smaller than the light amount that the external light is reflected by the half mirror 12. The brightness of the display panel 14 can be arbitrarily set. Thereby, the reflected light of the headlight at the half mirror 12 can be made difficult to feel dazzling.

  On the other hand, when not in the mirror mode (NO in step S12), the display panel 14 is in the display mode and the backlight 17 is lit. In this case, the display brightness is increased (step S14). Thereby, the difference of the brightness | luminance of the reflected light by the half mirror 12 and the brightness | luminance of the display panel 14 can be made small, and the reflected light of the half mirror 12 can be made hard to feel dazzling.

  Here, with reference to FIGS. 5-8, the state in which the headlight of the following vehicle reflected in the mirror apparatus is demonstrated. 5 and 6 are diagrams illustrating a state in which the headlight of the following vehicle is reflected in the mirror device according to the comparative example. 7 and 8 are diagrams illustrating a state in which the headlight of the following vehicle is reflected in the mirror device 1 according to the first embodiment. In the example shown here, it is assumed that the reflectance of the half mirror 12 is 40% and the transmittance is 60%. Hereinafter, description will be made assuming that the brightness of the headlight is 100. In this case, the brightness of the reflected light at the mirror surface 15 of the half mirror 12 is 40. In the comparative examples of FIGS. 5 and 6, the same components as those in the first embodiment are denoted by the same reference numerals.

  As shown in FIG. 5, in the comparative example, the display panel 14 is not turned on in the mirror mode. For this reason, when the driver looks at the half mirror 12, he / she recognizes the light of the head ride having the brightness of 0 or the peripheral range close to 0 and the brightness of 40. In this case, the difference between the brightness of the surroundings and the brightness of the headlight is large, and the driver is dazzled as shown in FIG.

  On the other hand, as shown in FIG. 7, in the first embodiment, when the amount of external light detected by the first light amount sensor 13 is greater than or equal to a predetermined first threshold value in the mirror mode, the display panel 14 Lights up. At this time, the display panel 14 is turned on at 30% brightness when the brightness of the headlight of the following vehicle is 100. For this reason, when the driver looks at the half mirror 12, he / she recognizes the range around the brightness 30 and the light of the headlight with the brightness 40. In this case, the difference between the brightness of the surroundings and the brightness of the headlight is small, and as shown in FIG. 8, it becomes difficult for the driver to feel the light of the head ride of the following vehicle by the half mirror 12.

  As described above, the mirror device with a display function according to the embodiment turns on the display panel 14 disposed on the back side of the half mirror 12 so that the light is reflected on the bright part or the surroundings are the same brightness. The reflected light from the half mirror 12 can be made difficult to feel dazzling by utilizing the characteristic of human eyes that it is difficult to feel dazzling when it is bright. Thus, in the mirror device according to the embodiment, it is not necessary to provide an additional configuration that performs the anti-glare function as in Patent Documents 1 and 2 described above. Further, in order to reduce the reflection of the headlight of the following vehicle on the rearview mirror, it is not necessary to add special processing such as changing the reflection angle of the glass on the rearview mirror surface or reducing the reflectance.

  Moreover, when displaying on the electronic mirror of patent document 1, a display brightness fall and a color change generate | occur | produce in an anti-glare state. For this reason, when displaying with the electronic mirror of patent document 1, it is necessary to stop the glare-proof control of EC element. On the other hand, in the mirror device 1 according to the first embodiment, in the display mode, the display brightness of the display panel 14 can be improved to display information on the display panel 14 and to exhibit an anti-glare function. . Thereby, in the mirror device 1, even when the display mode is set to the anti-glare state, it is possible to prevent the display luminance from being lowered and the color change from occurring.

  In addition, when setting it as a glare-proof state in mirror mode, it is preferable that the display control part 22 lights the display panel 14 in white. When the backlight 17 uses a white LED or a white cold cathode tube as a light source, the liquid crystal panel 16 transmits the light from the backlight 17 as it is. In the case of a self-luminous display panel, the display panel performs white display. In this way, by turning on the display panel 14 in white, it is possible to cope with headlights of various wavelengths.

Embodiment 2. FIG.
A mirror device 1A according to Embodiment 2 will be described with reference to FIG. FIG. 9 is a block diagram showing a configuration of the mirror device 1A. A mirror device 1A according to Embodiment 2 includes a mirror unit 10 and a control unit 20A. The control unit 20A includes an information acquisition unit 24 in addition to the control unit 20 of the first embodiment. Usually, at night when the surroundings of the mirror device 1A are dark, the glare caused by the light of the headlight of the following vehicle increases. The second embodiment has a structure in which an external situation of the vehicle is determined and the anti-glare state is switched only at night when the periphery of the mirror device 1A is dark.

  The information acquisition unit 24 is a determination unit that determines the external situation of the vehicle in which the mirror device 1A is installed. Here, it is assumed that the external information source 31 transmits the current time as an external situation of the vehicle. In this case, the information acquisition unit 24 determines day and night around the vehicle based on the current time. When the information acquisition unit 24 determines that the external situation of the vehicle is nighttime, the display control unit 22 displays the display panel when the amount of external light detected by the first light amount detection unit is equal to or greater than the first threshold. 14 is turned on.

  For example, the information acquisition unit 24 transmits the determination result to the display control unit 22 when determining that the external situation of the vehicle is nighttime. The display control unit 22 can drive the display panel 14 when receiving the determination result from the information acquisition unit 24 and the control signal from the light amount detection control unit 23.

  Here, with reference to FIG. 10, a control method of the mirror device 1A according to the second embodiment will be described. FIG. 10 is a flowchart showing a processing procedure of the mirror device 1A. As shown in FIG. 10, first, the amount of external light applied to the half mirror 12 is detected, and it is determined whether the detected amount of external light is greater than or equal to a predetermined first threshold value (step S21). When the detected amount of external light is not greater than or equal to the first threshold (NO in step S21), the display panel 14 is not turned on and the process ends.

  On the other hand, when external light having a light quantity equal to or greater than the first threshold is detected (step S21 YES), it is determined whether or not the external situation of the vehicle is night (step S22). Note that, as described above, whether or not the external situation of the vehicle is nighttime is determined based on the current time. When the external situation of the vehicle is not night (step S22 NO), the display panel 14 is not turned on and the process ends.

  On the other hand, when the external condition of the vehicle is night (step S22 YES), it is determined whether the display panel 14 is in the mirror mode (step S23). When the display panel 14 is in the mirror mode (YES in step S23), the display panel 14 is turned on (step S24), and the entire half mirror 12 is brightened. Thereby, the reflected light of the headlight at the half mirror 12 can be made difficult to feel dazzling.

  On the other hand, when it is not in the mirror mode (NO in step S23), the display luminance is increased (step S25). Thereby, the difference of the brightness | luminance of the reflected light by the half mirror 12 and the brightness | luminance of the display panel 14 can be made small, and the reflected light of the half mirror 12 can be made hard to feel dazzling.

  As described above, in the second embodiment, the power consumption of the display panel 14 can be suppressed by switching to the anti-glare state only at night when the periphery of the mirror device 1A is dark according to the determination of the determination unit. Become.

Embodiment 3 FIG.
A mirror device 1B according to Embodiment 3 will be described with reference to FIGS. FIG. 11 is a block diagram showing a configuration of the mirror device 1B. The mirror device 1B according to Embodiment 3 includes a mirror unit 10 and a control unit 20B. The control unit 20B includes a photographing control unit 21, a display control unit 22, and a light amount detection control unit 23B.

  Similar to the first embodiment, the light amount detection control unit 23B determines whether or not the amount of external light detected by the first light amount sensor 13 is equal to or greater than a predetermined first threshold value. Here, the 1st light quantity sensor 13 and the light quantity detection control part 23B are equivalent to the 1st light quantity detection part as described in a claim.

  Further, the light quantity detection control unit 23B determines the brightness of the outside of the vehicle according to the external light quantity of the vehicle detected by the second light quantity sensor 32. Therefore, the light quantity detection control unit 23B corresponds to a determination unit described in the claims. Also in the third embodiment, as in the second embodiment, the external situation of the vehicle is determined, and the anti-glare state is switched to only at night when the periphery of the mirror device 1B is dark.

  The second light quantity sensor 32 is disposed at a position where the external light quantity of the vehicle can be received. In the example shown in FIG. 12, the second light quantity sensor 32 is arranged on the bottom surface of the housing 11 of the shallow box. That is, the second light quantity sensor 32 is attached to the vehicle front side of the housing 11. Note that the arrangement position of the second light quantity sensor 32 is not limited to the example shown in FIG. 12 as long as the external light quantity of the vehicle can be detected.

  In the third embodiment, the light amount detection control unit 23B determines the brightness outside the vehicle based on the external light amount of the vehicle detected by the second light amount sensor 32. When the light amount detection control unit 23B determines that the external situation of the vehicle is dark, the display control unit 22 displays when the amount of external light detected by the first light amount sensor 13 is greater than or equal to the first threshold value. The panel 14 is turned on.

  For example, the light amount detection control unit 23B transmits the determination result to the display control unit 22 when the external light amount of the vehicle detected by the second light amount sensor 32 is less than a predetermined second threshold value. The second threshold value is a threshold value with which it is possible to determine that the external light amount of the vehicle corresponds to the night light amount. And the display control part 22 can drive the display panel 14, when the control signal from the light quantity detection control part 23B is received.

  Here, with reference to FIG. 13, a control method of the mirror device 1B according to the third embodiment will be described. FIG. 13 is a flowchart illustrating a processing procedure of the mirror device 1B. As shown in FIG. 13, first, the amount of external light applied to the half mirror 12 is detected, and it is determined whether the detected amount of external light is equal to or greater than a predetermined first threshold value (step S31). When the detected amount of external light is not greater than or equal to the first threshold (NO in step S31), the display panel 14 is not turned on and the process ends.

  On the other hand, when external light having a light quantity equal to or greater than the first threshold is detected (YES in step S31), the brightness outside the vehicle is determined (step S32). Note that, as described above, the determination of brightness outside the vehicle is determined based on whether or not the external light amount of the vehicle is less than a predetermined second threshold value. When the external light quantity of the vehicle is equal to or greater than the second threshold (NO in step S32), the display panel 14 is not turned on and the process ends.

  On the other hand, when the external light quantity of the vehicle is less than the second threshold (step S32 YES), it is determined whether the display panel 14 is in the mirror mode (step S33). When the display panel 14 is in the mirror mode (YES in step S33), the display panel 14 is turned on (step S34), and the entire half mirror 12 is brightened. Thereby, the reflected light of the headlight at the half mirror 12 can be made difficult to feel dazzling.

  On the other hand, when it is not in the mirror mode (NO in step S33), the display luminance is increased (step S35). Thereby, the difference of the brightness | luminance of the reflected light by the half mirror 12 and the brightness | luminance of the display panel 14 can be made small, and the reflected light of the half mirror 12 can be made hard to feel dazzling. As described above, also in the third embodiment, the power consumption of the display panel 14 can be suppressed by switching to the anti-glare state only when the periphery of the mirror device 1B is dark.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiments. However, the present invention is not limited to the embodiments already described, and various modifications can be made without departing from the scope of the invention. It goes without saying that it is possible.

DESCRIPTION OF SYMBOLS 1, 1A, 1B Mirror apparatus 10 Mirror part 11 Case 12 Half mirror 13 1st light quantity sensor 14 Display panel 15 Mirror surface 16 Liquid crystal panel 17 Backlight 20, 20A, 20B Control part 21 Shooting control part 22 Display control part 23 Light quantity Detection control unit 23B Light amount detection control unit 24 Information acquisition unit 30 Imaging unit 31 External information source 32 Second light amount sensor

Claims (9)

A display panel;
A half mirror disposed on the display surface side of the display panel;
A first light amount detection unit for detecting the amount of external light applied to the half mirror;
A display control unit that turns on the display panel when the amount of external light detected by the first light amount detection unit is equal to or greater than a predetermined first threshold;
A mirror apparatus comprising: The display control unit lights the display panel with a light amount smaller than a light amount reflected by the half mirror of the external light.
The mirror device according to claim 1. The display control unit lights the display panel in white.
The mirror device according to claim 1 or 2. A judgment unit for judging an external situation of the vehicle in which the mirror device is installed;
The display control unit turns on the display panel when the light amount of the external light detected by the first light amount detection unit is greater than or equal to the first threshold according to the external situation determined by the determination unit. Let
The mirror device according to any one of claims 1 to 3. The determination unit determines day and night based on the current time as an external situation of the vehicle,
When the determination unit determines that the external condition of the vehicle is nighttime, the display control unit is configured such that the amount of the external light detected by the first light amount detection unit is equal to or greater than the first threshold. Illuminate the display panel,
The mirror device according to claim 4. The determination unit determines external brightness of the vehicle based on an external light amount of the vehicle as an external situation of the vehicle,
When the determination unit determines that the external condition of the vehicle is dark, the display control unit is configured such that the amount of the external light detected by the first light amount detection unit is equal to or greater than the first threshold. Illuminate the display panel,
The mirror device according to claim 4. The display control unit can switch between a display mode for displaying information on the display panel and a mirror mode for not displaying information on the display panel,
Lighting the display panel when the display panel is in the mirror mode and the amount of the external light detected by the first light amount detector is equal to or greater than the first threshold;
The mirror device according to any one of claims 1 to 6. The display control unit displays the display brightness of the display panel when the display panel is in the display mode and the light amount of the external light detected by the first light amount detection unit is equal to or greater than the first threshold value. Increase the
The mirror device according to claim 7. A control method of a mirror device comprising a display panel and a half mirror disposed on the display surface side of the display panel,
Detecting the amount of external light applied to the half mirror;
Turning on the display panel when the detected amount of the external light is equal to or greater than a predetermined first threshold;
A method for controlling a mirror device.