JP7207251B2 - vehicle display - Google Patents

Description

The disclosure according to this specification relates to a display device for a vehicle.

2. Description of the Related Art Vehicle display devices are known that display information according to the type of vehicle. For example, the device disclosed in Patent Literature 1 is provided with a plurality of display devices, and performs display in which a plurality of display images by each display device are superimposed. This device allows the display to be viewed by the driver through an opening in the steering wheel.

JP 2017-347445 A

However, the device of Patent Document 1 can only display through the inside of the opening of the steering wheel. Therefore, when mounting the device on a vehicle, it is difficult to avoid interference with the steering wheel and realize a display that looks large relative to the opening.

In addition, in the device of Patent Document 1, due to an increase in the number of parts individually corresponding to each display and control circuit parts for controlling each display in cooperation with each other, not only is the cost of parts increased, Problems such as mounting space on the vehicle tend to occur.

One of the purposes of the disclosure of this specification is to provide a display device for a vehicle with improved mountability on the vehicle.

Another aspect disclosed here is a vehicle display device that displays toward a seat side in a vehicle,
an image display (230) that luminesces and displays an image on a display screen (232, 332);
An optical path is formed in which the display light emitted from the separation target portions (232R, 232L, 332R, 332L) of the display screen is imaged at a separation position separated from the display screen, and the image is divided into a plurality of divided images (DIC, DIR , DIL) having mirrors (242R, 42L, 342R, 342L) configured as if they were separately displayed;
The display screen includes a directly visible portion (232C) that is directly visible on the inner peripheral side of the steering wheel when viewed from the seat side, and has a curved surface shape in which the direction of the separation target portion and the direction of the directly visible portion are different. is formed in
The separation target part causes the display light to enter a mirror that is arranged so as to be directly visible on the outer peripheral side of the steering wheel when viewed from the seat side .
Another disclosed aspect is a vehicle display device that displays toward a seat side in a vehicle,
an image display (230) that luminesces and displays an image on a display screen (232, 332);
An optical path is formed in which the display light emitted from the separation target portions (232R, 232L, 332R, 332L) of the display screen is imaged at a separation position separated from the display screen, and the image is divided into a plurality of divided images (DIC, DIR , DIL) configured as if they were displayed separately (40R, 40L),
The image display device forms a display screen in a curved surface shape in which the orientation of the separation target part differs from the orientation of a part of the display screen other than the separation target part,
The image display
a display member (231), which is a flexible thin plate-like display member and has a display screen provided on one of the front surface (231a) and the back surface (231b);
a drive circuit (233) for driving the display member;
The display screen has, as another part, a directly visible part (232C) that is directly visible from the seat side,
A pair of separation target parts is provided in an arrangement that sandwiches the directly visible part,
An enclosure space (234) surrounded by the bent display member is formed on the back side by the state in which the pair of separation target portions are bent toward the back side with respect to the directly visible portion,
A drive circuit is housed in the enclosing space.

According to these aspects, when the display light is provided to the separation optical path forming section that separately displays the image on the display screen of the image display device as a plurality of divided images, the display screen is arranged such that the direction of the separation target part is It is formed in a curved surface shape so as to be different from the orientation of the part other than the part to be separated. In such a curved display screen, the direction in which the display light is emitted from another portion differs from the direction in which the display light is emitted from the separation target portion from the beginning. Therefore, by allowing the display light to travel as it is from the separation target portion, the display light can be easily guided to a position separated from another portion of the display screen, and the separation optical path forming section can be used to direct the display light from the separation target portion. The number of deflections for directing the display light toward the seat can also be suppressed.

Therefore, it is possible to simplify the structure of the separated optical path forming part, and furthermore, to make the physique or shape of the display device for a vehicle easy to mount on a vehicle. As described above, it is possible to provide a vehicle display device with improved mountability on a vehicle.

It should be noted that the reference numerals in parentheses exemplarily indicate the correspondence with the portions of the embodiment described later, and are not intended to limit the technical scope.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the display apparatus for vehicles of 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the display apparatus for vehicles of 1st Embodiment. FIG. 4 is a diagram for explaining division of a display screen according to the first embodiment; FIG. FIG. 4 is a diagram for explaining the positional relationship between display positions of divided images and a steering wheel according to the first embodiment; It is a sectional view showing the display for vehicles of a 2nd embodiment. It is a figure for demonstrating the division|segmentation of the display screen of 2nd Embodiment. FIG. 11 is a diagram for explaining the positional relationship between the display positions of divided images and the steering wheel according to the second embodiment; It is a sectional view showing the display for vehicles of a 3rd embodiment. FIG. 11 is a diagram for explaining the positional relationship between the display positions of divided images and a steering wheel according to the third embodiment; FIG. 11 is a diagram showing display distortion of divided images according to the third embodiment; It is a sectional view showing the display for vehicles of a 4th embodiment. It is a sectional view showing the display for vehicles of a 5th embodiment. It is a sectional view showing the display for vehicles of a 6th embodiment. FIG. 11 is a cross-sectional view showing a vehicle display device of Modification 1; FIG. 10 is a front view showing a vehicle display device of Modification 1; FIG. 11 is a cross-sectional view showing a vehicle display device of Modification 2;

A plurality of embodiments will be described below with reference to the drawings. Note that redundant description may be omitted by assigning the same reference numerals to corresponding components in each embodiment. When only a part of the configuration is described in each embodiment, the configurations of other embodiments previously described can be applied to other portions of the configuration. In addition, not only the combinations of the configurations specified in the description of each embodiment, but also the configurations of a plurality of embodiments can be partially combined even if they are not specified unless there is a particular problem with the combination. .

(First embodiment)
As shown in FIG. 1, the vehicle display device 100 according to the first embodiment of the present disclosure is mounted on a vehicle and installed on an instrument panel facing front and back to a seat on which an occupant as a viewer sits. . More specifically, the vehicular display device 100 is installed in a portion of the instrument panel facing the driver's seat, which front and rear faces the driver's seat on which the driver sits. In the present embodiment, directions indicated by up and down, front and rear, and left and right are described with reference to the vehicle on a horizontal plane. In addition, in the vehicle display device 100 of the present embodiment, the front side is the side that is recognized as the front side by the driver sitting in the driver's seat, and the back side is the side that is recognized as the back side by the driver. .

A steering wheel 1 of the vehicle is installed between a portion facing a driver's seat and a headrest portion of the driver's seat. A steering wheel 1 constitutes an operating portion that is rotated by a driver in a steering system for steering a vehicle. The steering wheel 1 has an annular rim portion 1a and a connection portion 1b (see FIG. 4) that connects the rim portion 1a to the steering shaft. The connection portion 1b has a center pad portion arranged on the axis of the steering shaft, spoke portions extending in the radial direction for connecting the center pad portion and the rim portion 1a, and the like.

The steering wheel 1 is formed with an opening 1c surrounded by the rim portion 1a and the connecting portion 1b. The opening 1c is positioned above the steering wheel 1 when the steering wheel 1 is in a normal posture (i.e., a posture corresponding to a steering angle in which the vehicle travels straight), and has a semicircular or fan shape with an arc portion arranged upward. formed into a shape. The opening 1c has a horizontally long shape with a maximum left-right dimension larger than a maximum vertical dimension.

In addition, the steering wheel 1 can adjust its position relative to the instrument panel, which is the fixing base of the vehicle display device 100, according to the physique of the passenger. For example, the position of the steering wheel 1 can be moved within a predetermined vertical range from the standard position.

The expressions of the radial direction, the radially inner peripheral side, and the radially outer peripheral side in the present embodiment are defined with reference to the rotation center axis 1d of the steering wheel 1 (see FIG. 4). For example, the steering shaft corresponds to the rotation center axis 1d.

The vehicular display device 100 is arranged in an area opposite to the driver's seat with the steering wheel 1 interposed therebetween (hereinafter referred to as a steering back area RA). The steering back area RA is defined as an area that includes not only the area directly behind the steering wheel 1 but also peripheral areas that are slightly displaced vertically and horizontally from the steering wheel 1 .

The vehicular display device 100 constitutes a so-called graphic meter that mainly displays an image by the image display device 30, and performs display toward the driver on the driver's seat side. The displayed information includes, for example, the speed of the vehicle, the number of revolutions of the engine, the remaining amount of fuel, the temperature of the engine cooling water, the current value of the electric motor, and other vehicle conditions such as vehicle abnormalities. Other information to be displayed includes, for example, various information such as warnings, road information, view assistance information (including electronic mirror images), and e-mails.

It is assumed that the display by the vehicular display device 100 is viewed from the center of the reference eye point on the driver's seat side. Here, the reference eye point center is a virtual point set for each vehicle, and is a point representing the positions of the driver's left and right eyes in normal driving conditions. The reference eyepoint center is generally set at a height of 635 mm directly above the seating reference point. The seating reference is the position of the human body model H point (hip joint point of the model) when the human body model is seated in a seat such as the driver's seat according to the seating method specified in ISO6549-1980, or set on the seat equivalent to this. design standard position.

The vehicular display device 100 is arranged across the blind spot area RA1, the inner peripheral side area RA2, and the outer peripheral side area RA3 in the steering back area RA. The blind spot area RA1 is a blind spot of the steering wheel 1 (of the rim portion 1a, for example) when viewed from the driver's seat (specifically, the center of the reference eye point) in the steering back area RA. The blind spot area RA1 may be defined based on the reference position of the steering wheel 1, or if the position of the steering wheel 1 is adjustable, it may be defined broadly corresponding to the movement range.

The inner peripheral side area RA2 is an area located on the radially inner peripheral side (hereinafter simply referred to as the inner peripheral side) of the blind spot area RA1 in the steering back area RA, and is the opening 1c of the steering wheel 1. This is an area that can be visually recognized by the driver through the The outer peripheral side area RA3 is an area located radially on the outer peripheral side (hereinafter simply referred to as the inner peripheral side) of the blind spot area RA1 in the steering back area RA.

As shown in FIG. 2, such a vehicle display device 100 includes a case 10, an image display device 30, a plurality of mirrors 41R, 42R, 41L, 42R, and the like.

The case 10 has a holding member 11 and a front panel 21 . The holding member 11 is made of synthetic resin, for example, and is light-shielding. The holding member 11 holds the image display 30 and the mirrors 41R, 42R, 41L, 42R. The holding member 11 is formed in the shape of a bottomed dish having an opening window 11a that opens on the front side as viewed from the driver's seat. The holding member 11 has an optical path accommodating chamber 12 and an indicator accommodating chamber 16 formed on the far side of the optical path accommodating chamber 12 when viewed from the driver's seat. The optical path accommodation chamber 12 is composed of blind spot spaces 13R and 13L corresponding to the blind spot region RA1, an inner peripheral space 14 corresponding to the inner peripheral region RA2, and outer peripheral spaces 15R and 15L corresponding to the outer peripheral region RA3. and forms an integral space straddling them.

The inner peripheral space 14 corresponds to the central portion of the optical path accommodation chamber 12 . A pair of blind spaces 13R and 13L can be defined by arranging the inner peripheral space 14 from both left and right sides corresponding to the left and right portions of the rim portion 1a. A pair of the outer peripheral spaces 15R and 15L can be defined by an arrangement that sandwiches the inner peripheral space 14 and the dead space 13R and 13L from both left and right sides.

The display housing chamber 16 is formed so as to be connected to the inner peripheral side space 14 and the dead space spaces 13R and 13L of the optical path housing chamber 12 through an entrance portion 16a, and is formed in a box shape smaller than the optical path housing chamber 12. ing. The display housing chamber 16 has a shape protruding toward the back side with respect to the optical path housing chamber 12 .

The front panel 21 is formed to cover the opening window 11a, and has, for example, a pair of light blocking lids 22R and 22L and three transmission windows 23C, 23R and 23L. A pair of light shielding lids 22R and 22L are provided on the front side of the blind spot spaces 13R and 13L corresponding to the pair of blind spot spaces 13R and 13L. Each of the light shielding lids 22R and 22L is formed in a light shielding lid shape so as to block the corresponding dead space 13R and 13L entirely, and extends vertically so as to connect the upper and lower edges of the opening window 11a. .

The three transmission windows 23C, 23R, 23L are provided in front of the inner peripheral space 14 and the outer peripheral spaces 15R, 15L in correspondence with the inner peripheral space 14 and the pair of outer peripheral spaces 15R, 15L. ing. Each transmission window 23C, 23R, 23L may be closed with translucent synthetic resin or glass, or may be physically opened by forming an opening.

The image display 30 is arranged to be housed in the display housing chamber 16 . The image display device 30 has a display member 31 and a drive circuit 33 . The display member 31 employs a substantially inflexible display such as a liquid crystal panel that emits light to display an image on a single flat display screen 32 . The display member 31 is arranged so as to block the entire surface of the entrance portion 16 a of the display housing chamber 16 . By turning the display screen 32 toward the driver's seat, display light that can be imaged as an image is emitted from the entire surface of the display screen 32 toward the front side. The drive circuit 33 is arranged on the back side of the display member 31 in the display housing chamber 16 . The drive circuit 33 is an electronic circuit that drives the display member 31 so that the latest image is displayed on the display screen 32 successively.

As shown in FIG. 3, the display screen 32 has a plurality of portions 32C, 32R, 32L divided virtually or controlled to display a plurality of divided images DIC, DIR, DIL, which will be described later. The directly visible part 32</b>C is a part that emits display light toward the inner peripheral space 14 . The separation target portion 32R is arranged adjacent to the right side of the portion 32C, and is a portion that emits display light toward the blind spot space 13L on the right side. The separation target portion 32L is a portion that is arranged adjacent to the left side of the portion 32C and that emits display light toward the blind spot space 13R on the left side. For example, the size of the display screen 32 is 300 mm×100 mm. The size of the portion 32C is 180 mm×100 mm. The size of the portion 32R and the size of the portion 32L are each 60 mm×100 mm.

In the divided image DIC corresponding to the directly visible portion 32C, the placement of light shielding objects and the like in the inner peripheral space 14 is regulated, and the transmission window 23C is formed, so that the display screen 32 can be viewed from the driver's seat. It can be directly visually recognized as a real image of the part as it is. As shown in FIG. 4, the display position of the divided image DIC based on this real image is a position on the inner peripheral side of the blind spot area RA1, and the divided image DIC is visually recognized by the driver through the opening 1c of the steering wheel 1. be.

On the other hand, the divided images DIR and DIL corresponding to the separation target sites 32R and 32L are displayed as virtual images at display positions different from the separation target sites 32R and 32L by the mirrors 41R, 42R, 41L and 42R.

As shown in FIGS. 3 and 4, a total of four mirrors 41R, 42R, 41L, and 42R are provided, two corresponding to the portion 32R and two corresponding to the portion 32L. A mirror 41R corresponding to the portion 32R is arranged in the dead space 13R. The mirror 41R has a reflecting surface with a reflectance of about 90% by forming a thin film of metal such as aluminum on the surface of a base material made of, for example, synthetic resin or metal. The reflecting surface is formed in a planar shape inclined by about 45 degrees with respect to the display screen 32 so as to move away from the portion 32R as it goes from the inner peripheral side to the outer peripheral side, in other words, as it goes rightward.

A mirror 42R corresponding to the portion 32R is arranged in the outer space 15R so as to face the mirror 41R in the left and right direction. The mirror 42R forms a reflecting surface with a reflectance of about 90% by forming a thin film of metal such as aluminum on the surface of a base material made of synthetic resin or metal, for example. The reflecting surface is tilted about 45 degrees with respect to the display screen 32 so as to move away from the rear wall defining the rear side of the outer peripheral space 15R as it goes from the inner peripheral side to the outer peripheral side, in other words, as it goes rightward. It is formed flat.

Since the reflecting surfaces face each other, the display light emitted from the portion 32R is reflected in the order of the mirror 41R and the mirror 42R, and is emitted to the front side of the device through the transmission window 23R. The mirror 41R has a function of deflecting the display light from the portion 32R of the display light emitted from the display screen 32 in a traveling direction different from that of the display light from the portion 32C. The mirror 42R has a function of returning the deflected display light to the direction of travel common to that of the display light from the portion 32C at a position away from the display screen 32 .

These mirrors 41R and 42R form an optical path for forming the real image displayed on the portion 32R as a virtual image at a separation position separated from the display screen 32. FIG. The separation position is in the air behind the mirror 42R away from the display screen 32 on the right side. Since the portion 32R is hidden by the mirror 41R and the light shielding lid 22R, it cannot be directly confirmed from the driver's seat. The mirrors 41R, 42R configure the image displayed on the display screen 32 as if the split image DIR were displayed separately from the other split images DIC, DIL. The mirrors 41R and 42R are elements that constitute the separation optical path forming section 40R. The display position of the divided image DIR based on the virtual image is a position on the outer peripheral side of the blind spot area RA1, and is visually recognized outside on the right side of the steering wheel 1 by the driver.

A mirror 41L corresponding to the portion 32L is arranged in the dead space 13L. The mirror 41L has a reflecting surface with a reflectance of about 90% by forming a metal thin film such as aluminum on the surface of a base material made of, for example, synthetic resin or metal. The reflective surface is formed in a planar shape inclined by about 45 degrees with respect to the display screen 32 so as to move away from the portion 32L as it goes from the inner peripheral side to the outer peripheral side, in other words, as it goes leftward.

A mirror 42L corresponding to the portion 32L is arranged in the outer peripheral space 15L so as to face the mirror 41L in the left and right direction. The mirror 42L has a reflecting surface with a reflectance of about 90% by forming a thin film of metal such as aluminum on the surface of a base material made of, for example, synthetic resin or metal. The reflecting surface is tilted about 45 degrees with respect to the display screen 32 so as to move away from the back wall defining the back side of the outer peripheral space 15L as it goes from the inner peripheral side to the outer peripheral side, in other words, as it goes leftward. It is formed flat.

Since the reflecting surfaces face each other, the display light emitted from the portion 32L is reflected in the order of the mirror 41L and the mirror 42L, and is emitted to the front side of the apparatus through the transmission window 23L. The mirror 41L has a function of deflecting the display light from the portion 32L among the display light emitted from the display screen 32 in a traveling direction different from that of the display light from the portion 32C. The mirror 42L has a function of returning the deflected display light to a direction shared with the display light from the portion 32C at a position away from the display screen 32 .

These mirrors 41L and 42L form an optical path for forming the real image displayed on the portion 32L as a virtual image at a separation position separated from the display screen 32 . The separation position is in the air behind the mirror 42L away from the display screen 32 to the left. Since the portion 32L is hidden by the mirror 41L and the light shielding lid 22L, it cannot be directly confirmed from the driver's seat. The mirrors 41L, 42L configure the image displayed on the display screen 32 as if the divided image DIL were displayed separately from the other divided images DIC, DIR. The mirrors 41L and 42L are elements that constitute the separation optical path forming section 40L. The display position of the divided image DIL based on the virtual image is a position on the outer peripheral side of the blind spot area RA1, and is visually recognized outside on the left side of the steering wheel 1 by the driver.

The split images DIR and DIL may be arranged such as by adjusting the angles of the mirrors 41R, 42R, 41L and 42R so that only the driver can see them. Alternatively, the split images DIR and DIL are adjusted in terms of the angles of the mirrors 41R, 42R, 41L and 42R so that not only the driver but also other occupants sitting in the front passenger seat can see them. good too.

As described above, the plurality of divided images DIC, DIR, and DIL are displayed on both the inner and outer peripheral sides of the blind spot area RA1 of the steering wheel 1 so as to avoid the blind spot area RA1. Displayed separately. In addition, since the display position of the real divided image DIC is located on the front side with respect to the display positions of the virtual divided images DIR and DIL, the display of the vehicle display device 100 is given a sense of depth. By realizing a plurality of divided images DIC, DIR, and DIL with a single display member 31, the cost of the display member 31 can be reduced, the increase in the number of drive circuits 33 can be suppressed, and the complexity can be suppressed. The mounting space has been reduced.

(Effect)
The effects of the first embodiment described above will be described again below.

According to the first embodiment, the display light emitted from the separation target portions 32R and 32L of the display screen 32 of the image display device 30 is guided through the optical paths formed by the separation optical path forming portions 40R and 40L, and is guided to the separation position. is imaged to Since this separation position is a position separated from the display screen 32, the image displayed on the display screen 32 is constructed as if the plurality of divided images DIC, DIR, and DIL are separately displayed. In such an image separation display, at least a part of the display position can be separated while avoiding interference with the steering wheel 1 arranged on the front side of the vehicle display device 100 .

The display positions of the plurality of divided images DIC, DIR, and DIL are divided on both the inner and outer peripheral sides of the blind spot area RA1, which is the blind spot of the steering wheel 1, when viewed from the seat side. In this way, while the inside of the opening 1c of the steering wheel 1 is used for display, the display can also be displayed outside the steering wheel 1, thereby realizing a display that looks larger than the opening 1c. Therefore, it is possible to mount the vehicular display device 100 whose display is easy to see even on the opposite side of the seat with the steering wheel 1 interposed therebetween. As described above, it is possible to provide the vehicle display device 100 with improved mountability on the vehicle.

Further, according to the first embodiment, the separation optical path forming portions 40R and 40L reflect the display light emitted from the separation target portions 32R and 32L toward the seat side, and the mirror 42R forms a virtual image at the separation position. , 42L. By utilizing the reflection of the mirrors 42R and 42L, it is possible to easily separate the virtual image formed by imaging the display light from the display screen 32. FIG.

(Second embodiment)
As shown in FIGS. 5-7, the second embodiment is a modification of the first embodiment. The second embodiment will be described with a focus on points different from the first embodiment.

In the second embodiment, the holding member 211 is configured to accommodate the image display device 230 and the mirrors 42R and 42L in a common storage chamber 212, as shown in FIG. The common storage chamber 212 has substantially the same shape and size as the optical path storage chamber 12 of the first embodiment. That is, in the second embodiment, the size of the device is reduced by the volume of the display housing chamber 16 projecting from the optical path housing chamber 12 to the back side in the first embodiment. Similar to the optical path accommodation chamber 12 of the first embodiment, the common accommodation chamber 212 is an integrated space extending over the inner peripheral space 14, the pair of blind spaces 13R and 13L, and the pair of outer peripheral spaces 15R and 15L. forming

The image display device 230 is arranged in the inner peripheral space 14 of the common storage chamber 212 . In the image display device 230 of the second embodiment, the display member 231 is formed in the shape of a flexible thin plate. formed. Specifically, for the display member 231, for example, an OLED display in which the display screen 232 is configured by arranging OLEDs (Organic Light-Emitting Diodes), a micro LED display in which the display screen 232 is configured by arranging micro LEDs, or the like is adopted. obtain.

As in the first embodiment, the display screen 232 has a directly visible portion 232C and separation target portions 232R and 232L sandwiching the directly visible portion 232C from both sides. The display screen 232 is formed in a curved surface shape in which the orientations of the portions 232C, 232R, and 232L are different from each other. As shown in FIG. 6, each of the portions 232C, 232R, 232L is formed in a substantially planar shape, and each boundary portion between the adjacent portions 232R and 232C or between the adjacent portions 232C and 232L is approximately 90 degrees. , the entire display screen 232 has a curved surface shape.

Specifically, as shown in FIGS. 5 and 7, the directly visible portion 232C is arranged in the inner peripheral space 14 so as to face the transmission window 23C and face the front side. Accordingly, the divided image DIC displayed on the directly visible portion 232C can be directly viewed as a real image as it is from the driver's seat.

The separation target portion 232R is arranged so as to face the right blind spot space 13R and the outer peripheral space 15R. Corresponding to such a portion 232R, no mirror corresponding to the mirror 41R of the first embodiment is provided, and only one mirror corresponding to the mirror 42R is provided. In this embodiment, the direction of the display light emitted from the portion 232C and the direction of the display light emitted from the portion 232R are originally different. Therefore, as long as there is a mirror 42R having a function of returning the display light to a direction shared with the display light from the portion 232C at a position away from the display screen 232, image formation at the separation position is realized. can do.

The separation target portion 232L is arranged so as to face the left blind spot space 13L and the outer peripheral space 15L. Corresponding to such a portion 232L, no mirror corresponding to the mirror 41L of the first embodiment is provided, and only one mirror corresponding to the mirror 42L is provided. That is, since the direction of the display light emitted from the portion 232C and the direction of the display light emitted from the portion 232L are originally different, the display light is emitted from the portion 232C at a position away from the display screen 232. As long as there is only the mirror 42L having the function of returning to the traveling direction common to that of the light beam, it is possible to realize imaging at the separation position.

Since the number of mirrors corresponding to one portion 232R or 232L can be reduced, the luminance loss of the display light is reduced before the display light travels through the mirrors 42R or 42L toward the seat. In the case where the image display device 230 employs an OLED, continued use in a high-addition (high-brightness) state is likely to cause performance deterioration and burn-in. For this reason, it is particularly effective to reduce the luminance loss that makes it possible to suppress the use of the high load state.

Thus, the pair of separation target portions 232R and 232L are bent toward the back surface 231b with respect to the directly visible portion 232C. An enclosed space 234 surrounded by the bent display member 231 is formed on the back surface 231b side. A drive circuit 233 of the second embodiment is housed in this enclosing space 234 .

According to the second embodiment described above, when providing display light to the separate optical path forming units 40R and 40L for separately displaying an image on the display screen 232 of the image display device 230 as a plurality of divided images DIC, DIR, and DIL, The display screen 232 is formed in a curved surface shape so that the orientation of the separation target portions 232R and 232L is different from the orientation of another portion (for example, the directly visible portion 232C). In such a curved display screen 232, the direction in which display light is emitted from another portion differs from the direction in which display light is emitted from the separation target portions 232R and 232L from the beginning. Therefore, by allowing the display light to proceed from the separation target portions 232R and 232L as they are, the display light can be easily guided to a position separated from another portion of the display screen 232, and the separation optical path forming portions 40R and 40L can be easily guided. However, the number of deflections for directing the display light from the separation target portions 232R and 232L to the seat side can also be suppressed.

Therefore, the configuration of the separated optical path forming portions 40R and 40L can be simplified, and the physique or shape of the vehicular display device 100 can be configured to be easily mounted on a vehicle. As described above, it is possible to provide the vehicle display device 100 with improved mountability on the vehicle.

Further, according to the second embodiment, the image display device 230 is a flexible thin plate-like display member, and includes a display member 231 having a display screen 232 provided on a front surface 231a and a display member 231. and a drive circuit 233 for driving. The display screen 232 has a directly visible portion 232C, which is directly visible from the seat side, as a portion other than the separation target portions 232R and 232L. Furthermore, a pair of the separation target portions 232R and 232L are provided so as to sandwich the directly visible portion 232C. In addition, since the pair of separation target portions 232R and 232L are bent toward the back surface 231b with respect to the directly visible portion 232C, an enclosed space surrounded by the bent display member 231 is formed on the back surface 231b side. 234 are formed. Since the drive circuit 233 is accommodated in the enclosing space 234, the enclosing space 234 generated by the realization of the curved display screen 232 is prevented from becoming a dead space. The physical size of the device 100 can be reduced. Therefore, the mountability of the vehicle display device 100 on the vehicle is further enhanced.

(Third Embodiment)
As shown in FIGS. 8-10, the third embodiment is a modification of the second embodiment. The third embodiment will be described with a focus on points different from the second embodiment.

The separation target portions 332R and 332L of the third embodiment are curved in a smooth convex shape so as to protrude toward the corresponding mirrors 342R and 342. FIG. More specifically, the separation target parts 332R and 332L are formed in a cylindrical surface shape having a generatrix along the vertical direction so that the bending direction is aligned with the bending direction due to the bending of the boundary with the directly visible part 232C. .

The mirrors 342R and 342L of the third embodiment reflect the display light emitted from the separation target portions 332R and 332L toward the driver's seat side, and form divided images DIR and DIL as virtual images at the separation positions. The reflective surfaces of the mirrors 342R and 342L are curved in a smooth concave shape so that the central portion is concave. The reflecting surface is formed in the shape of a cylindrical surface having a generatrix extending in the vertical direction, or in the shape of a concave toroidal surface having a minimum curvature in the vertical direction. Due to the shape of the reflecting surfaces, the mirrors 342R and 342L magnify the virtual image formed at the separation position and move the separation position to the back side with respect to the display screen 332. FIG.

According to the third embodiment described above, the separation target portions 332R and 332L of the display screen 232 are curved in a smooth convex shape, and the reflecting surfaces of the mirrors 342R and 342L are curved in a smooth concave shape. Such convex separation target portions 332R and 332L reduce display distortion of the divided images DIR and DIL that may occur as a side effect of the virtual image enlarging function by the reflecting surfaces of the mirrors 342R and 342L, as shown in FIG.

In addition, in FIG. 10, the display distortion in the third embodiment is indicated by a solid line. Display distortion in the reference embodiment in which the separation target portions 332R and 332L are formed flat on the concave reflecting surfaces of the mirrors 342R and 342L is indicated by broken lines.

(Fourth embodiment)
As shown in FIG. 11, the fourth embodiment is a modification of the second embodiment. The fourth embodiment will be described with a focus on points different from the second embodiment.

A mirror 442L provided instead of the mirror 42L in the fourth embodiment is formed so as to be able to transmit light of a specific wavelength different from display light. The specific wavelength different from the display light may be a wavelength in an invisible range (for example, an infrared range) or a wavelength in the visible range that is not used as display light. For example, the mirror 442L of the present embodiment is formed so as to be able to transmit near-infrared light, which has characteristics that are difficult for the driver to recognize, as light of a specific wavelength.

The mirror 442L of the fourth embodiment is formed, for example, by providing an optical multilayer film having wavelength selectivity or an optical filter substitutable thereon on the surface of translucent synthetic resin or glass.

In the outer peripheral space 15L where the mirror 442L is arranged in the holding member 211, a triangular prism-shaped space that is a blind spot of the mirror 442L when viewed from the driver's seat is formed as a mirror behind space 15T. A camera 451 and an illumination light source 452 are arranged in the space 15T behind the mirror.

The camera 451 and the illumination light source 452 are a driver status monitor (Driver Status Monitor) for the purpose of detecting the position of the driver's eyes, the line-of-sight direction, etc., and monitoring the state of the driver, such as dozing off and looking aside. Monitor, DSM) configuration.

The camera 451 is a near-infrared camera that photographs the driver's seat side using light in the near-infrared region as light of a specific wavelength. The camera 451 is arranged with the lens directed toward the headrest portion of the driver's seat, so that the image of the driver's head can be captured.

The illumination light source 452 is a near-infrared LED element that illuminates the driver's seat side with light in the near-infrared region as light of a specific wavelength. The illumination light source 452 illuminates the driver's head to improve the imaging quality of the camera 451 and improve detection accuracy or determination accuracy in DSM.

According to the fourth embodiment described above, the mirror 442L is formed so as to be able to transmit light of a specific wavelength different from display light. A camera 451 is arranged in the space 15T behind the mirror, which is a blind spot of the mirror 442L when viewed from the seat side, and photographs the seat side using light of a specific wavelength. The presence of such a camera 451 is camouflaged by being superimposed on a virtual image of the divided image DIL. Therefore, it is possible to photograph the driver from the front while making it difficult for the driver to notice the presence of the camera 451 . In addition, it is possible to prevent the space 15T behind the mirror, which is generated by the arrangement of the mirror 442L, from becoming a dead space.

In the fourth embodiment, an illumination light source 452 is arranged in the space 15T behind the mirror, which is a blind spot of the mirror 442L when viewed from the seat side, and illuminates the seat side with light of a specific wavelength. Such an illumination light source 452 is camouflaged by being superimposed on a virtual image of the divided image DIL. Therefore, it is possible to illuminate the driver from the front while making it difficult for the driver to notice the presence of the illumination light source 452 . In addition, it is possible to prevent the space 15T behind the mirror, which is generated by the arrangement of the mirror 442L, from becoming a dead space.

(Fifth embodiment)
As shown in FIG. 12, the fifth embodiment is a modification of the second embodiment. The fifth embodiment will be described with a focus on points that are different from the second embodiment.

In the fifth embodiment, a pair of speakers 553R and 553L are further provided. Each speaker 553R, 553L is arranged adjacent to the corresponding separation target part 232R, 232L. Specifically, the speakers 553R and 553L are arranged so as to be embedded in the rear side wall that defines the rear side of the dead space 13R and 13L in the common housing chamber 212 .

Each of the speakers 553R and 553L can output sound by converting an analog electric signal applied from the control circuit into physical vibration using a voice coil and a diaphragm. The control circuit may be provided on a common substrate with the drive circuit 233 of the image display device 230 or may be provided separately from the drive circuit 233 .

Each speaker 553R, 553L outputs sound toward the dead space 13R, 13L, ie, the optical path formed by the mirrors 42R, 42L. Sounds output from the respective speakers 553R and 553L are provided to the driver's seat side through the transmissive windows 23R and 23L while being echoed along the optical paths as reverberation paths. That is, the sound is echoed by the light shielding lids 22R, 22L and the mirrors 42R, 42L surrounding the spaces (blind spot spaces 13R, 13L and outer peripheral spaces 15R, 15L) forming the optical path. It is preferable that the transmission windows 23R and 23L have openings so that sound can easily pass through them. The sound may be stereophonically reproduced using both left and right paired speakers 553R and 553L.

With these speakers 553R and 553L, for example, it is possible to notify the presence of surrounding vehicles by sound when changing lanes, and to notify an alarm of a corner sensor when parking.

According to the fifth embodiment described above, it is arranged adjacent to the separation target portions 232R and 232L, outputs sound toward the optical path, functions the optical path as a sound echo path, and directs the sound toward the seat side. Serving speakers 553R, 553L are provided. By sharing the echo path of the sound with the optical path, it is possible to provide the driver with a sound that is easy to hear while suppressing an increase in the size of the vehicle display device 100 due to the addition of parts for echoing the sound. .

(Sixth embodiment)
As shown in FIG. 13, the sixth embodiment is a modification of the second embodiment. The sixth embodiment will be described with a focus on points different from the second embodiment.

In the fifth embodiment, a pair of air outlets 654R and 654L are provided. Each air outlet 654R, 654L is arranged adjacent to the corresponding separation target portion 232R, 232L. Specifically, the air outlets 654R and 654L are provided in the rear side walls of the common storage chamber 212 that define the rear sides of the blind spaces 13R and 13L.

Each of the wind outlets 654R, 654L blows out wind toward the dead space 13R, 13L, that is, the optical path formed by the mirrors 42R, 42L. The air blown out from the air outlets 654R, 654L passes through the optical path and is provided to the driver's seat side through the transmission windows 23R, 23L. The transmissive windows 23R and 23L are configured to have openings to facilitate the passage of air.

When the air outlets 654R and 654L are provided for the purpose of air-conditioning the interior of the vehicle or the area around the driver's seat, air is blown out from a vehicle air conditioner such as a car air conditioner. Under these circumstances, the wind becomes cool or warm air that matches the temperature of the air conditioner. The air outlets 654R, 654L may be provided for the purpose of giving a wake-up effect to a drowsy driver. In this case, the wind may be taken in from outside the vehicle. Also, the air outlets 654R and 654L may be provided for the purpose of cooling the inside of the display device 100 for vehicle. Naturally, the wind outlets 654R and 654L may be provided for two or more purposes among the plurality of purposes described above.

According to the sixth embodiment described above, the air outlets 654R and 654L are arranged adjacent to the separation target portions 232R and 232L, blow air toward the optical path, and provide the air toward the seat side through the optical path. be provided. By sharing the passage of the wind with the optical path, it is possible to allow the passage of the wind while suppressing an increase in the size of the vehicle display device 100 .

(Other embodiments)
Although a plurality of embodiments have been described above, the present disclosure is not to be construed as being limited to those embodiments, and can be applied to various embodiments and combinations within the scope of the present disclosure. can be done.

Specifically, as shown in FIGS. 14 and 15, as a modification 1, warning lights, indicator lights, etc. display element 55 may be provided. Moreover, a sensor such as a temperature sensor may be provided on the light shielding lids 22R and 22L.

As a modified example 2, as shown in FIG. 16, the mirrors 42R and 42L of the first embodiment are replaced with a mirror 342R having a reflecting surface curved in a smooth concave shape so that the central portion is concave as in the third embodiment. , 342L.

As a modification 3, the separation optical path forming units 40R and 40L are not limited to forming an optical path for forming a virtual image at the separation position using only mirrors. It may be one that forms a real image (aerial image).

As a modification 4, the separation target parts 32R, 32L, 232R, 232L, 332R, 332L may be provided on the display screens 32, 232, 332 by one or any number of three or more. The number of components constituting the separation optical path forming sections 40R and 40L may be appropriately changed according to the number and arrangement of the separation target portions 32R and 32L.

As a fifth modification, the display screen 32 may not be provided with a directly visible portion. For example, the display screen 32 may be divided into two parts to be separated 32R and 32L. In this case, the divided image DIR by one of the separation target parts 32R is displayed on the inner peripheral side of the blind spot area RA1, and the divided image DIL by the other separation target part 32L is displayed on the outer peripheral side of the blind spot area RA1. can be

As a sixth modification, the vehicle display device 100 may not be installed in the steering back area RA. For example, in a vehicle in which the steering wheel 1 is not arranged, it may be installed in a portion facing the driver's seat facing front and back to the driver's seat on which the driver sits. Further, the vehicle display device 100 does not have to be installed in the portion facing the driver's seat. For example, the vehicular display device 100 may be a center display installed in the central portion of the instrument panel, or may be a display device arranged on the ceiling of the vehicle.

100: vehicle display device, 1: steering wheel, 1c: opening, 30, 230: image display, 32, 232, 332: display screen, 32R, 32L, 232R, 232L, 332R, 332L: separation target part, 40R, 40L: separated optical path forming portions, DIC, DIR, DIL: divided images, RA1: blind area

Claims (8)

In a vehicle, a display device for a vehicle is arranged on the opposite side of a seat with a steering wheel (1) forming an opening (1c) interposed therebetween, and performs display toward the seat side,
an image display (30, 230) that luminesces and displays an image on a display screen (32, 232, 332);
forming an optical path for forming an image of display light emitted from separation target portions (32R, 32L, 232R, 232L, 332R, 332L) of the display screen at a separation position separated from the display screen, and forming a plurality of the images; A separate optical path forming unit (40R, 40L) configured as if the divided images (DIC, DIR, DIL) of the are displayed separately,
The plurality of divided images are divided into display positions on both sides of the inner peripheral side and the outer peripheral side of the blind spot area (RA1) so as to avoid the blind spot area (RA1) that is the blind spot of the steering wheel when viewed from the seat side. displayed as
The image display device
forming the display screen in a curved surface shape in which the orientation of the separation target portion is different from the orientation of a portion of the display screen other than the separation target portion;
a display member (231), which is a flexible thin plate-like display member, the display screen being provided on one of the front surface (231a) and the back surface (231b);
a driving circuit (233) for driving the display member;
The display screen has, as the separate part, a directly visible part (232C) that is directly visible from the seat side,
The separation target part is provided in a pair so as to sandwich the directly visible part,
An enclosure space (234) surrounded by the bent display member is formed on the back surface side by the state in which the pair of the separation target portions are bent toward the back surface side with respect to the directly visible portion. is,
The vehicle display device, wherein the driving circuit is housed in the enclosing space. A vehicle display device that displays toward the seat side in a vehicle,
an image display (230) that luminesces and displays an image on a display screen (232, 332);
An optical path is formed in which the display light emitted from the separation target portions (232R, 232L, 332R, 332L) of the display screen is imaged at a separation position separated from the display screen, and the image is divided into a plurality of divided images ( DIC, DIR, DIL) are configured as if they were displayed separately (40R, 40L),
The image display device forms the display screen in a curved surface shape in which the orientation of the separation target portion is different from the orientation of a portion of the display screen other than the separation target portion,
The image display device
a display member (231), which is a flexible thin plate-like display member, the display screen being provided on one of the front surface (231a) and the back surface (231b);
a driving circuit (233) for driving the display member;
The display screen has, as the separate part, a directly visible part (232C) that is directly visible from the seat side,
The separation target part is provided in a pair so as to sandwich the directly visible part,
An enclosure space (234) surrounded by the bent display member is formed on the back surface side by the state in which the pair of the separation target portions are bent toward the back surface side with respect to the directly visible portion. is,
The vehicle display device, wherein the driving circuit is housed in the enclosing space. The separation optical path forming section has mirrors (342R, 342L) that reflect the display light emitted from the separation target portion toward the seat side and form a virtual image at the separation position,
3. The vehicle display device according to claim 1 , wherein the separation target portion is curved in a smooth convex shape, and the reflecting surface of the mirror is curved in a smooth concave shape. The separation optical path forming section reflects the display light emitted from the separation target portion toward the seat side and forms a virtual image at the separation position (42R, 42L, 342R, 342L, 442L). The vehicle display device according to claim 1 or 2 . The mirror (442L) is formed to be able to transmit light of a specific wavelength different from the display light,
5. The vehicle according to claim 3 or 4 , further comprising a camera (451) arranged in a space (15T) behind the mirror, which is a blind spot of the mirror when viewed from the seat side, for photographing the seat side using the light of the specific wavelength. vehicle display device. The mirror (442L) is formed to be able to transmit light of a specific wavelength different from the display light,
5. The illumination light source (452) according to claim 3 or 4 , further comprising an illumination light source (452) arranged in a space (15T) behind the mirror, which is a blind spot of the mirror when viewed from the seat side, and illuminating the seat side with the light of the specific wavelength. Vehicle display. speakers (553R, 553L) that are arranged adjacent to the separation target part, output sound toward the optical path, make the optical path function as an echo path of the sound, and provide sound toward the seat side; 7. The vehicle display device according to any one of claims 1 to 6 , further comprising: 8. A wind outlet (654R, 654L ) arranged adjacent to the separation target part, blowing wind toward the optical path, and providing wind toward the seat through the optical path. The vehicle display device according to any one of the above.

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