JP2015230329A - In-vehicle projection display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an HUD with improved display quality by reducing an effect of field curvature caused by an HUD optical system including a windshield without using a screen.SOLUTION: A flexible display device is employed as a display device 10 in an HUD unit 100. The flexible display device is held and fixed in a bent state in order to correct field curvature of a virtual image 60 caused by an effect of curvature of a concave mirror 50 and a windshield WS. A separate optical correction member is disposed in front of the bent display device 10 along a light path. The optical correction member has a curved surface curved in a direction different from that of the curvature of the display device 10. No screen is required since the display device 10 itself bears a function of correcting the field curvature.

Description

  The present invention relates to a vehicle projection display device that performs display using light reflection of a windshield (window glass) or the like in front of a driver in a vehicle.

  For example, in a general vehicle head-up display (HUD) device, an image of light including various information to be displayed is projected from a HUD unit onto a front windshield or a reflector called a combiner, and the front windshield The light path is formed so that the light reflected by the light heads in the direction of the driver's viewpoint. Accordingly, the driver can visually recognize the HUD displayed on the front windshield or the like as a virtual image while simultaneously viewing the scenery in front of the vehicle through the front windshield. That is, the driver can visually recognize various information by displaying the HUD without moving the line of sight while maintaining the normal driving state.

  By the way, in an apparatus that projects a display image using reflection of light on the surface of the windshield, such as HUD, there is a possibility that an image visually recognized by the driver may be distorted. That is, in addition to the deformation of the image caused by the light being reflected obliquely on the surface of the windshield, the image itself is distorted because the surface of the windshield itself has a gently curved shape. In addition, since the curvature and the inclination angle with respect to the horizontal plane (or vertical plane) are different for each place on the windshield, various distortions occur in the displayed display image depending on the situation, which adversely affects the visibility. . In addition, when an image is projected using a magnifying optical system, aberration occurs due to the influence of the curved surfaces of lenses and mirrors included in the optical system.

  Conventionally, it is known that an aberration generated by a windshield of a vehicle or a HUD optical system is a factor of distortion generated in a display image (virtual image). Further, among various aberrations, three-dimensional distortion of a display image (virtual image) due to “field curvature” is considered to be one factor that deteriorates display quality.

  In order to correct such distortion of the display image, for example, there are display systems that employ an aspherical mirror in the optical system. In some cases, an image that is previously distorted is displayed on the display screen of the display device so that a desired display image (virtual image) can be obtained.

  Further, for example, Patent Document 1 discloses a technique for correcting a three-dimensional distortion of a virtual image caused by field curvature.

  In the head-up display device disclosed in Patent Document 1, laser light emitted from a laser scanner is projected onto an image plane of a screen. Further, the light of the image on the imaging surface is reflected while being diffused, and further passes through the concave mirror and the projection surface of the windshield and travels toward the eye point. In addition, the image formation surface of the screen has a convex shape that is curved in the horizontal direction of the image to be imaged. It is corrected.

JP2013-25205A

  By adopting an aspherical mirror as the reflecting mirror of the HUD optical system, the aberration caused by the characteristics of the reflecting surface of the windshield of the vehicle and the aberration caused by the characteristics of the reflecting mirror itself can be reduced. It cannot be corrected.

  Further, by giving distortion in advance to the image displayed on the screen of the display device built in the HUD unit, it is possible to correct distortion of the virtual image visually recognized at the eye point to some extent. However, since the screen of a general display device is planar, even if the image displayed on this screen is distorted, only the planar distortion of the displayed virtual image can be corrected. That is, since the depth direction of the image (the direction of the optical axis when projecting the image) cannot be corrected, the three-dimensional distortion of the display image (virtual image) due to “field curvature” cannot be corrected.

  When a screen for projecting an image is employed as in Patent Document 1, the surface of the screen can be curved. Therefore, the curved shape of the screen surface can reduce the three-dimensional distortion of the display image (virtual image) due to the “field curvature” caused by characteristics such as a windshield.

  However, since the screen surface employed in the projector apparatus or the like is a diffusing surface, the light of the display image projected on the screen is scattered. For this reason, there is a problem in that the light use efficiency is deteriorated, and the power consumption and heat generation of the light source are excessively generated. In addition, when external light such as sunlight is incident on the surface of the screen, there is a problem that visibility of display light is reduced due to scattering of the external light.

  The present invention has been made in view of the above-described circumstances, and its purpose is to reduce the influence of “field curvature” caused by a windshield and other HUD optical systems without using a screen, and to improve display quality. Another object of the present invention is to provide a vehicular projection display device that can do this.

In order to achieve the above-described object, a vehicle projection display device according to the present invention is characterized by the following (1) to (7).
(1) Light including an arbitrary display image formed in a planar shape in a predetermined display area is emitted from a projection unit and guided to a reflection surface of a windshield of a vehicle or a light reflection member in the vicinity thereof. A projection display device for a vehicle that projects a reflected display image of the light so as to be visible as a virtual image at a predetermined eye point,
A flexible display device having a display area capable of forming the display image, formed in a thin plate shape or a sheet shape, and having flexibility;
A shape holding member for holding the shape of the flexible display device in a state where at least a part of the flexible display device is curved;
A vehicle projection display apparatus comprising:
(2) A vehicle projection display device having the configuration of (1) above,
The shape holding member is a base substrate that supports the main body of the flexible display device, and has a surface shape in which the shape is fixed in a predetermined curved state.
A projection display apparatus for a vehicle characterized by the above.
(3) A vehicle projection display device having the configuration of (1) above,
The shape holding member is a plate-like support member having a surface shape curved in a predetermined state,
The flexible display device is affixed and fixed to the surface of the shape holding member.
A projection display apparatus for a vehicle characterized by the above.
(4) A vehicle projection display device having the configuration of (1) above,
The shape holding member includes a filler that is filled and solidified in a space between the flexible display device and a support member that supports the flexible display device in a state where the flexible display device is curved.
A projection display apparatus for a vehicle characterized by the above.
(5) A vehicle projection display device having the configuration of (1) above,
The shape holding member includes a movable support mechanism that comes into contact with a part of the flexible display device, and the bending state of the flexible display device changes as the movable support mechanism moves.
A projection display apparatus for a vehicle characterized by the above.
(6) A vehicle projection display device having any one of the constitutions (1) to (4),
The curved state of the flexible display device is defined as a shape that corrects aberrations of field curvature caused by at least one of the characteristics of an optical system that projects the display image and the characteristics of a windshield of a vehicle.
A projection display apparatus for a vehicle characterized by the above.
(7) A vehicle projection display device having any one of the constitutions (1) to (6),
Furthermore, an optical correction member disposed in the projection direction of the flexible display device is provided,
The optical correction member has a curved surface curved in a direction different from the curved state of the surface of the flexible display device.
A projection display apparatus for a vehicle characterized by the above.

According to the projection display device for a vehicle having the configuration (1), the surface of the flexible display device that emits display light is curved. Therefore, this shape reduces three-dimensional distortion, that is, aberration of curvature of field. It can be corrected. There is no need to prepare a special screen.
According to the vehicle projection display device having the configuration (2), the curved shape of the flexible display device can be formed in advance in a shape necessary for three-dimensional distortion correction.
According to the projection display apparatus for a vehicle having the configuration (3), the curved shape of the flexible display device can be fixed to a desired shape only by a simple pasting operation.
According to the vehicle projection display device having the configuration (4), the shape of the flexible display device can be fixed in a state where the flexible display device is curved into a desired curved shape.
According to the vehicle projection display device having the configuration (5), the curved shape of the flexible display device can be adjusted as necessary by moving the movable support mechanism. Therefore, for example, the curved shape can be adjusted in accordance with the surface shape of the actual windshield of the vehicle, and aberrations of field curvature can be corrected.
According to the projection display apparatus for a vehicle having the configuration (6), the aberration of the curvature of field is corrected by the curved state of the flexible display device, so that the influence exerted by the windshield of the vehicle is reduced and a high quality display is achieved. The image can be displayed as a virtual image.
According to the vehicle projection display device having the configuration (7), it is possible to correct the aberration of curvature of field with higher accuracy. That is, although the flexible display device is flexible, there are certain restrictions and limitations when the shape is curved, and the actual situation is that the curved shape cannot be curved. By combining the optical correction member having a different curved shape direction and the flexible display device, various curvatures of field can be corrected.

  According to the vehicle projection display apparatus of the present invention, it is possible to reduce the influence of “field curvature” caused by the windshield and other HUD optical systems and improve display quality without using a special screen. It is.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a longitudinal sectional view showing the positional relationship of each element when a vehicle equipped with a HUD unit is viewed from the side. 2 is an optical path diagram showing an optical path when the surface of the display device is a flat surface in the vehicle projection display apparatus shown in FIG. FIG. 3 is an optical path diagram showing an optical path when the surface of the display device is curved in the vehicle projection display apparatus shown in FIG. 4 (A) and 4 (B) are longitudinal sectional views showing the structure in the thickness direction of the display device in “Configuration Example 1”, respectively, before and after integrating a plurality of elements. Represents. FIG. 5A and FIG. 5B are longitudinal sectional views showing the configuration in the thickness direction of the display device and its supporting member in “Configuration Example 2”, and before and after integrating a plurality of elements, respectively. Represents the state after conversion. FIG. 6 is a longitudinal cross-sectional view showing the configuration in the thickness direction of the display device and its supporting member in “Configuration Example 3”. FIG. 7 is a longitudinal sectional view showing the configuration in the thickness direction of the display device and its supporting member in “Configuration Example 4”. FIG. 8 is a longitudinal sectional view showing the configuration in the thickness direction of the display device and its supporting member in “Configuration Example 5”. FIG. 9 is a perspective view showing the display device and the optical correction member in “Configuration Example 6”.

  Specific embodiments relating to the vehicle projection display apparatus of the present invention will be described below with reference to the drawings.

<Basic configuration example of a vehicle projection display device>
FIG. 1 shows the positional relationship of each element when a vehicle projection display device, that is, a vehicle equipped with the HUD unit 100 is viewed from the side.

  The HUD unit 100 shown in FIG. 1 is housed inside the dashboard of the vehicle, and is configured so that light including a display image can be emitted upward from an opening 70 formed in a part of the upper surface of the dashboard. Has been.

  The HUD unit 100 includes a display device 10, a concave mirror 50, and a display control unit (not shown). The display device 10 has a display surface that can display an arbitrary two-dimensional image. In the case of a general display device, the display surface is a flat surface. However, as described later, in the display device 10 of the present embodiment, the surface 10a, that is, the display surface is held in a curved shape.

  On the display surface of the display device 10, information useful for driving the vehicle, for example, numerical values of vehicle speed and character information such as “km / h” are displayed as necessary. As shown in FIG. 1, the light including the two-dimensional display image displayed on the display surface of the display device 10 is emitted from the display device 10 toward the concave mirror 50, reflected by the surface of the concave mirror 50, and the opening 70. It is emitted from. The light emitted from the opening 70 is reflected by the surface of the windshield WS and travels toward the eye point EP. Therefore, the driver can visually recognize the display image projected by the HUD unit 100 at the position of the eye point EP. The display image actually viewed by the driver is formed as a virtual image 60 at a predetermined position ahead of the windshield WS. Since the concave mirror 50 has optical magnification, it can project a display image that is visually recognized by the driver in an enlarged state.

  In the example of FIG. 1, the light emitted from the HUD unit 100 is reflected by the surface of the windshield WS, but an optical reflecting member called a combiner or a half mirror may be used instead of the windshield WS.

<Description of optical path>
FIG. 2 shows an optical path when the surface 10a of the display device 10 is a flat surface in the vehicle projection display device shown in FIG. FIG. 3 shows an optical path when the surface 10a of the display device 10 is curved.

  2 and 3, the point f represents the focal point of the concave mirror 50, and the point c represents the spherical center of the concave mirror 50. 2 and 3, it is assumed that the concave mirror 50 has a single radius of curvature in order to facilitate understanding of the principle.

  When the surface 10a of the display device 10 is a flat surface, as shown in FIG. 2, the image forming position of the virtual image 60A is not on a plane because it is affected by the reflecting surface of the concave mirror 50 formed on a curved surface. It becomes the position of the curved surface. Therefore, when the driver visually recognizes the virtual image 60A, an aberration of curvature of field occurs, and distortion of the optical axis in the depth direction occurs.

  On the other hand, in FIG. 3, the shape of the surface 10 a of the display device 10 is curved in order to correct the influence of the curved surface shape of the reflecting surface of the concave mirror 50. Therefore, as shown in FIG. 3, the imaging position of the virtual image 60B is on a plane, and no field curvature occurs. Thereby, even when the concave mirror 50 is used, a high-quality virtual image display can be realized without being affected by the concave mirror 50.

  2 and 3, only the influence of the concave mirror 50 is shown, but in practice, the surface of the windshield WS is also generally a curved surface. Accordingly, the curvature of field as shown in FIG. 2 may occur due to the influence of the curved surface of the windshield WS.

  Therefore, it is necessary to determine the curved shape of the surface 10a of the display device 10 in consideration of both the influence of the concave mirror 50 and the influence of the windshield WS. Thereby, the virtual image 60B without a field curvature is obtained similarly to FIG.

<Description of Display Device 10 and Related Elements>
A configuration example for realizing the display device 10 having the curved surface 10a as shown in FIG. 3 will be described below.

<Configuration example 1>
4 (A) and 4 (B) are longitudinal sectional views showing the structure in the thickness direction of the display device 10 in “Configuration Example 1”, and before and after integrating a plurality of elements, respectively. Represents a state. In order to facilitate understanding of the structure, in FIGS. 4A and 4B, the thickness direction is shown larger than the actual direction. The actual display device 10 has a sheet shape or a thin plate shape with a thickness of about 1 mm to several mm, for example.

  A display device 10 shown in FIGS. 4A and 4B includes an organic EL display element layer 11, a flexible transparent resin substrate 12, and a transparent base substrate 13. The organic EL display element layer 11 and the flexible transparent resin substrate 12 are so-called flexible display devices and have flexibility. In addition, although this embodiment demonstrates the display device 10 comprised by the organic electroluminescent display element layer 11 and the flexible transparent resin substrate 12, the display device which has a softness | flexibility is applicable to this invention.

  In the organic EL display element layer 11, a large number of fine organic EL display elements are formed at regular intervals in the vertical direction (left-right direction in FIG. 4) and in the horizontal direction (depth direction in FIG. 4). Although not shown, each organic EL display element includes a sealing layer, a negative electrode, an organic semiconductor, a positive electrode, a drive circuit, and a transistor (TFT), as in a general organic EL display element.

  Since the organic EL display element layer 11 is formed on the flexible transparent resin substrate 12, it has flexibility and can be curved as necessary. Further, in this embodiment, in order to realize the display device 10 whose shape is fixed in a curved state as shown in FIG. 4B, it is integrated with the rigid transparent base substrate 13.

  The transparent base substrate 13 is previously processed into a specific curved shape necessary for correcting the curved surface shape of the reflecting surface of the concave mirror 50 shown in FIG. 1 and the curvature of field due to the surface shape of the windshield WS. As shown in FIG. 4A, by laminating the organic EL display element layer 11 and the flexible transparent resin substrate 12 on the transparent base substrate 13, and fixing (for example, bonding) the surfaces in close contact with each other, The entire display device 10 is formed into a curved shape as shown in FIG.

  Therefore, by mounting the display device 10 shown in FIG. 4B on the HUD unit 100 shown in FIG. 1, it becomes possible to obtain a virtual image 60B having no curvature of field as shown in FIG. .

  4A and 4B, the transparent base substrate 13 is made of a transparent material because the transparent base substrate 13 is in the light emitting direction. However, when the transparent base substrate 13 is disposed on the opposite side, You may comprise with an opaque material.

<Configuration example 2>
FIG. 5A and FIG. 5B are longitudinal sectional views showing the configuration in the thickness direction of the display device 10B and its supporting member in “Configuration Example 2”, respectively, before integrating a plurality of elements and Shows the state after integration.

  A display device 10B illustrated in FIGS. 5A and 5B is a so-called flexible display device and has flexibility. On the display device 10B, a large number of fine organic EL display elements are formed in the vertical direction (left-right direction in FIG. 5) and the horizontal direction (depth direction in FIG. 5) at regular intervals. Although not shown, each organic EL display element includes a sealing layer, a negative electrode, an organic semiconductor, a positive electrode, a drive circuit, and a transistor (TFT), as in a general organic EL display element.

  In the present embodiment, the curved support member 21 is used to hold the display device 10B in a curved state as shown in FIG. 4B. The surface shape of the curved support member 21 is formed in a predetermined shape. In other words, the curved support member 21 is formed into a shape necessary for correcting the curved surface shape of the reflecting surface of the concave mirror 50 shown in FIG. 1 and the curvature of field due to the curved surface shape of the windshield WS.

  As shown in FIG. 5A, the display device 10B is laminated and adhered to the surface of the curved support member 21 and fixed by adhesion or the like. Thereby, the shape of the display device 10B can be held in a curved state as shown in FIG.

  Therefore, by mounting the display device 10B shown in FIG. 5B on the HUD unit 100 shown in FIG. 1, it becomes possible to obtain a virtual image 60B having no curvature of field as shown in FIG. .

  5A and 5B, the curved support member 21 is formed of an opaque material because the curved support member 21 is on the opposite side to the light emission direction. When arranged in the direction, the curved support member 21 needs to be made of a transparent material.

<Configuration example 3>
FIG. 6 is a longitudinal cross-sectional view showing the configuration in the thickness direction of the display device and its supporting member in “Configuration Example 3”.

  The display device 10B shown in FIG. 6 is a so-called flexible display device and has flexibility. On the display device 10B, a large number of fine organic EL display elements are formed at regular intervals in the vertical direction (left-right direction in FIG. 6) and in the horizontal direction (depth direction in FIG. 6). Although not shown, each organic EL display element includes a sealing layer, a negative electrode, an organic semiconductor, a positive electrode, a drive circuit, and a transistor (TFT), as in a general organic EL display element.

  In the present embodiment, the support member 22 and the filler 23 are used to hold the display device 10B in a curved state. That is, when the display device 10B is fixed on the planar support member 22, the display device 10B is curved so as to have a predetermined shape, and the space between the display device 10B and the support member 22 is filled. Agent 23 is filled. When the filler 23 is solidified, the shape of the display device 10 </ b> B is fixed as shown in FIG. 6, and the display device 10 </ b> B is fixed on the support member 22.

  With respect to the curved shape of the display device 10B in a state where the shape is fixed, it is necessary for correcting the curved surface shape of the reflecting surface of the concave mirror 50 and the curved surface shape of the windshield WS shown in FIG. Molded to match the shape.

  Therefore, by mounting the display device 10B shown in FIG. 6 on the HUD unit 100 shown in FIG. 1, it becomes possible to obtain a virtual image 60B having no field curvature as shown in FIG.

  In the configuration example of FIG. 6, since the support member 22 and the filler 23 are on the opposite side to the light emission direction, the support member 22 and the filler 23 are made of an opaque material, but are arranged in the light emission direction. In this case, it is necessary to form the support member 22 and the filler 23 with a transparent material.

<Configuration example 4>
FIG. 7 is a longitudinal sectional view showing the configuration in the thickness direction of the display device and its supporting member in “Configuration Example 4”.

  As shown in FIG. 7, in “Configuration Example 4”, both end portions of the display device 10 </ b> B are supported by movable support mechanisms 31 and 32, respectively. The movable support mechanism 31 is configured to be movable in the A1 direction, and the movable support mechanism 32 is configured to be movable in the A2 direction.

  Therefore, by moving the movable support mechanisms 31 and 32, these distances can be made closer or farther away. By such movement, the bending state of the display device 10B changes, and the central portion of the display device 10B moves in the A3 direction.

  That is, when the distance between the movable support mechanism 31 and the movable support mechanism 32 is reduced, the shape of the display device 10B is greatly curved. When the distance between the movable support mechanism 31 and the movable support mechanism 32 is increased, the display device 10B is curved. Less. Thereby, the shape of the display device 10B can be adjusted to a desired shape.

  Therefore, in the HUD unit 100 shown in FIG. 1, the curvature of the field curvature is corrected by adjusting the curved shape of the display device 10B of FIG. 7 according to the shape of the concave mirror 50 and the shape of the windshield WS. The display quality of the virtual image 60 can be improved.

<Configuration example 5>
FIG. 8 is a longitudinal sectional view showing the configuration in the thickness direction of the display device and its supporting member in “Configuration Example 5”.

  As shown in FIG. 8, in “Configuration Example 5”, the vicinity of the center of the display device 10 </ b> B is supported by the movable support mechanism 33. Further, both end portions of the display device 10B are supported so as not to move in the thickness direction. The movable support mechanism 33 is configured to be movable in the A4 direction.

  Therefore, by moving the movable support mechanism 33 in the A4 direction, the central portion of the display device 10B moves in the thickness direction (A4 direction). Thereby, the shape of the display device 10B can be adjusted to a desired curved shape.

  Therefore, in the HUD unit 100 shown in FIG. 1, the curvature of the field curvature is corrected by adjusting the curved shape of the display device 10B of FIG. 8 according to the shape of the concave mirror 50 and the shape of the windshield WS. The display quality of the virtual image 60 can be improved.

<Configuration example 6>
FIG. 9 is a perspective view showing the display device 10 and the optical correction member 41 in “Configuration Example 6”.

  As shown in FIG. 9, in “Configuration Example 6”, the optical correction member 41 is disposed in front of the display device 10 having a curved shape (light emission direction). Further, the display device 10 is curved in a shape in which the central portion protrudes from the peripheral portion in the longitudinal direction so as to follow the direction Ax that goes around the axis X. The optical correction member 41 is an optical correction lens having a curved surface 41a having a surface shape that extends along the direction Ay that goes around the axis Y. The axis X and the axis Y are different in direction, for example, arranged in a positional relationship orthogonal to each other.

  Generally, the shape of the flexible display device can be changed relatively freely such as paper. However, since the distortion allowed by the flexible display device has certain restrictions and limits, it is difficult to form the distortion into a spherical shape, for example.

  On the other hand, the shape of the reflecting surface of the concave mirror 50 and the surface of the windshield WS are often spherical or have a complicated three-dimensional shape. Therefore, only the shape change of the display device 10 can sufficiently cope with these shapes. There are cases where it cannot be completed.

  In “Configuration Example 6” in FIG. 9, the display device 10 curved along the direction Ax and the optical correction member 41 having a surface curved along the direction Ay are used in combination. Therefore, it is possible to correct the curvature of field caused by the spherical surface, the concave mirror 50 having a complicated three-dimensional shape, or the windshield WS with high accuracy.

Here, the features of the above-described embodiment of the vehicle projection display device according to the present invention are summarized and listed in the following (1) to (7), respectively.
(1) Light including an arbitrary display image formed in a planar shape in a predetermined display area is emitted from a projection unit and guided to a windshield (WS) of a vehicle or a reflection surface of a light reflection member in the vicinity thereof, A vehicle projection display device (HUD unit 100) that projects a display image of the light reflected by a reflecting surface so as to be visible as a virtual image at a predetermined eye point (EP),
A flexible display device (organic EL display element layer 11, flexible transparent resin substrate 12) having a display area capable of forming the display image, formed in a thin plate shape or a sheet shape, and having flexibility;
A shape holding member (transparent base substrate 13) for holding the shape of the flexible display device in a state where at least a part of the flexible display device is curved;
A vehicle projection display apparatus comprising:
(2) A vehicle projection display device having the configuration of (1) above,
The shape holding member is a base substrate (transparent base substrate 13) that supports the main body of the flexible display device, and has a surface shape in which the shape is fixed in a predetermined curved state.
A projection display apparatus for a vehicle characterized by the above.
(3) A vehicle projection display device having the configuration of (1) above,
The shape holding member is a plate-like support member (curved support member 21) having a surface shape curved in a predetermined state,
The flexible display device is affixed and fixed to the surface of the shape holding member.
A projection display apparatus for a vehicle characterized by the above.
(4) A vehicle projection display device having the configuration of (1) above,
The shape holding member includes a filler (23) that is filled and solidified in a space between the flexible display device and a support member that supports the flexible display device in a state where the flexible display device is curved.
A projection display apparatus for a vehicle characterized by the above.
(5) A vehicle projection display device having the configuration of (1) above,
The shape holding member includes a movable support mechanism (31, 32, 33) that comes into contact with a part of the flexible display device, and the bending state of the flexible display device changes as the movable support mechanism moves.
A projection display apparatus for a vehicle characterized by the above.
(6) A vehicle projection display device having any one of the constitutions (1) to (4),
The curved state of the flexible display device is determined to be a shape that corrects an aberration of curvature of field caused by at least one of the characteristics of the optical system (concave mirror 50) that projects the display image and the characteristics of the windshield (WS) of the vehicle. is there,
A projection display apparatus for a vehicle characterized by the above.
(7) A vehicle projection display device having any one of the constitutions (1) to (6),
Furthermore, an optical correction member (41) disposed in front of the projection direction of the flexible display device is provided,
The optical correction member has a curved surface (41a) curved in a direction different from the curved state of the surface of the flexible display device.
A projection display apparatus for a vehicle characterized by the above.

DESCRIPTION OF SYMBOLS 10,10B Display device 10a Surface 11 Organic EL display element layer 12 Flexible transparent resin substrate 13 Transparent base substrate 21 Curved support member 22 Support member 23 Filler 31, 32, 33 Movable support mechanism 41 Optical correction member 41a Curved surface 50 Concave mirror 60, 60A, 60B Virtual image 70 Aperture 100 HUD unit WS Windshield X, Y axis Ax, Ay Curve direction EP Eye point

Claims (7)

Light including an arbitrary display image formed in a planar shape in a predetermined display area is emitted from the projection unit, guided to the reflection surface of the vehicle windshield or a light reflection member in the vicinity thereof, and reflected by the reflection surface. A projection display device for a vehicle that projects so that a display image of light can be visually recognized as a virtual image at a predetermined eye point,
A flexible display device having a display area capable of forming the display image, formed in a thin plate shape or a sheet shape, and having flexibility;
A shape holding member for holding the shape of the flexible display device in a state where at least a part of the flexible display device is curved;
A vehicle projection display apparatus comprising: The vehicle projection display device according to claim 1,
The shape holding member is a base substrate that supports the main body of the flexible display device, and has a surface shape in which the shape is fixed in a predetermined curved state.
A projection display apparatus for a vehicle characterized by the above. The vehicle projection display device according to claim 1,
The shape holding member is a plate-like support member having a surface shape curved in a predetermined state,
The flexible display device is affixed and fixed to the surface of the shape holding member.
A projection display apparatus for a vehicle characterized by the above. The vehicle projection display device according to claim 1,
The shape holding member includes a filler that is filled and solidified in a space between the flexible display device and a support member that supports the flexible display device in a state where the flexible display device is curved.
A projection display apparatus for a vehicle characterized by the above. The vehicle projection display device according to claim 1,
The shape holding member includes a movable support mechanism that comes into contact with a part of the flexible display device, and the bending state of the flexible display device changes as the movable support mechanism moves.
A projection display apparatus for a vehicle characterized by the above. The vehicle projection display device according to any one of claims 1 to 4,
The curved state of the flexible display device is defined as a shape that corrects aberrations of field curvature caused by at least one of the characteristics of an optical system that projects the display image and the characteristics of a windshield of a vehicle.
A projection display apparatus for a vehicle characterized by the above. The vehicle projection display device according to any one of claims 1 to 6,
Furthermore, an optical correction member disposed in the projection direction of the flexible display device is provided,
The optical correction member has a curved surface curved in a direction different from the curved state of the surface of the flexible display device.
A projection display apparatus for a vehicle characterized by the above.

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