Display device

Abstract

To provide a display device which can inhibit deterioration of visibility of a front scenery.SOLUTION: A display device includes: a ceramic formation part 10 provided at a lower end area of a windshield 1a of a vehicle; and a display unit located in a dashboard of the vehicle and emitting light indicating an image toward the ceramic formation part 10. The ceramic formation part 10 has: a driver seat front side part 11 located on a front side of a driver seat of the vehicle; and a passenger seat front side part 12 located on a front side of a passenger seat of the vehicle. An upper end 12t of the passenger seat front side part 12 is lower than a highest point M of the driver seat front side part 11.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a display device. [Background technology]

[0002] As a display device, for example, Patent Document 1 describes a device that emits light representing an image toward a ceramic formation portion (a portion where black ceramic is formed) provided in the lower end region of a vehicle's windshield, thereby allowing the driver to view the image. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 3-62085 Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of display device, if the ceramic formation portion is expanded in the left-right direction of the vehicle without taking any measures to ensure a large image display area, there is a risk that the driver's visibility of the scenery ahead through the windshield will be reduced.

[0005] The present disclosure has been made in consideration of the above-described circumstances, and has an object to provide a display device that can suppress a decrease in visibility of a forward scene. [Means for solving the problem]

[0006] In order to achieve the above object, the display device according to the present disclosure comprises: a ceramic formation provided in a lower end region of a vehicle windshield; a display unit located in a dashboard of the vehicle and emitting light representing an image toward the ceramic formation; the ceramic forming portion has a driver's seat front portion located in front of a driver's seat of the vehicle and a passenger's seat front portion located in front of a passenger's seat of the vehicle, The upper end of the front portion of the passenger seat is lower than the highest point of the front portion of the driver seat. Effect of the Invention

[0007] According to the present disclosure, it is possible to suppress a decrease in visibility of the scenery ahead. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing application of a display device according to an embodiment of the present disclosure to a vehicle. [Diagram 2] FIG. 4 is a front view of a windshield for explaining a range of a ceramic forming portion according to the embodiment of the present invention. [Diagram 3] FIG. 4 is a side view of a windshield for explaining a range of a ceramic forming portion according to the embodiment of the present invention. [Figure 4] FIG. 4 is a perspective view of the windshield for explaining the range of the ceramic forming portion according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of the present disclosure will be described with reference to the drawings.

[0010] As shown in FIG. 1, the display device 100 of this embodiment comprises a ceramic forming portion 10 provided in the lower end region of a windshield 1a of a vehicle 1 (automobile), a display unit 20 that emits light (hereinafter, display light L) that displays an image toward the ceramic forming portion 10, and a cylindrical body 30.

[0011] In the following, explanations may be given using the X, Y, and Z axes shown in each figure. The direction in which the arrow of each axis points is the "+" (plus) direction, and the opposite direction is the "-" (minus) direction. The X axis is a horizontal axis extending in the length direction of the vehicle 1. The +X direction is the rear direction of the vehicle 1, and the -X direction is the front direction of the vehicle 1. The Y axis is a horizontal axis extending in the width direction of the vehicle 1 and perpendicular to the X axis. The +Y direction is the right direction of the vehicle 1, and the -Y direction is the left direction of the vehicle 1. The Z axis is an axis perpendicular to the X and Y axes. The +Z direction is the upward direction of the vehicle 1, and the -Z direction is the downward direction of the vehicle 1.

[0012] The ceramic-formed portion 10 is a portion of the windshield 1a where black ceramic is formed by baking coating, and is commonly called a black ceramic portion. A reflective mirror surface that reflects the display light L toward the driver 2 of the vehicle 1 is formed on the inner surface of the ceramic-formed portion 10 of the windshield 1a.

[0013] The ceramic forming portion 10 may be provided on the inner surface (the surface facing the driver 2) of the windshield 1a or on the outer surface of the windshield 1a. In addition, when the windshield 1a is composed of a laminated glass of multiple pieces of glass, the ceramic forming portion 10 may be provided inside the windshield 1a.

[0014] The display light L reflected by the ceramic forming portion 10 proceeds toward the driver 2. By placing his / her viewpoint within the eye box 2a, the driver 2 can visually recognize a virtual image of the image represented by the display light L. To the driver 2, the image appears to be displayed on the ceramic forming portion 10 (specifically, behind the ceramic forming portion 10). The image indicates, for example, various information related to the vehicle 1 (hereinafter referred to as vehicle information). The vehicle information may include not only information about the vehicle 1 itself, but also external information about the vehicle 1, such as information about the surroundings of the vehicle 1. Details of the ceramic forming portion 10 will be described later.

[0015] The display unit 20 is composed of an LCD (Liquid Crystal Display), an organic EL (Electro-Luminescence) display, or the like, and is provided in the dashboard 1b (including the instrument panel) of the vehicle 1. The display unit 20 can display an image showing vehicle information in an image display area 21. That is, the image display area 21 is a pixel formation area in the display unit 20, and is an area where an image can be displayed. Display light L representing the image is emitted from the image display area 21 toward the windshield 1a (specifically, the ceramic formation portion 10). The eye box 2a is optically determined by the relative positional relationship between the image display area 21 and the windshield 1a, and the shape of the portion (reflection surface) of the windshield 1a that receives the display light L. Therefore, the center point O of the eye box 2a corresponds to the center of the image display area 21.

[0016] The cylindrical body 30 is formed, for example, by a part of the dashboard 1b, and passes the display light L emitted from the display unit 20 and directed toward the windshield 1a. That is, the cylindrical body 30 is located between the display unit 20 and the windshield 1a. The cylindrical body 30 may be a member that is combined with the dashboard 1b. The display unit 20 is located below the cylindrical body 30, and emits the display light L into the cylindrical body 30. The upper end of the cylindrical body 30 forms an opening 31 that is a portion from which the display light L is emitted from the dashboard 1b. The cylindrical body 30 is made of a light-absorbing material such as black, or is made by applying a surface treatment to reduce reflection. This makes it possible to suppress stray light, such as sunlight reflected after entering the cylindrical body 30 and the display light L reflected at a portion other than the ceramic forming portion 10, from reaching the eye box 2a.

[0017] The display device 100 also includes a control unit (not shown) that controls the display operation of the display unit 20. The control unit is composed of, for example, a microcontroller, and communicates with various electronic components such as an ECU (Electronic Control Unit) of the vehicle 1 to monitor various states of the vehicle 1. The control unit also generates an image to be displayed on the display unit 20 based on various states of the vehicle 1 and image data for drawing stored in a memory. The control unit is mounted on, for example, a PCB (Printed Circuit Board) disposed in the dashboard 1b.

[0018] (Ceramic forming part 10) Fig. 2 is a front view of the windshield 1a as seen from inside the vehicle. As shown in Fig. 2, the ceramic-formed portion 10 is formed from the left end to the right end of the windshield 1a. In Fig. 2, the thick line in the windshield 1a indicates the upper end 10t of the ceramic-formed portion 10.

[0019] The ceramic forming part 10 has a driver's seat front part 11 located in front of the driver's seat of the vehicle 1, and a passenger's seat front part 12 located in front of the passenger's seat of the vehicle 1. In the windshield 1a, the driver's seat front part 11 and the passenger's seat front part 12 are located on opposite sides of a virtual line S that divides the vehicle 1 equally in the width direction. For example, the display unit 20 can emit display light L not only to the driver's seat front part 11 but also to the passenger's seat front part 12, and display an image represented by the display light L on the passenger's seat front part 12. The display unit 20 that realizes this may be composed of a single display, or may be composed of multiple displays arranged in the left-right direction.

[0020] As shown in FIG. 2, in the ceramic forming part 10, the upper end 12t of the passenger seat front part 12 is formed to be lower than the highest point M of the driver seat front part 11. The highest point M is the highest position in the +Z direction of the upper end 11t of the driver seat front part 11. This unique shape of the ceramic forming part 10 prevents the upper end 12t of the passenger seat front part 12 from narrowing the light transmitting part of the windshield 1a more than necessary, so that even when the driver 2 moves his / her line of sight to the passenger seat side, the visibility of the scenery ahead can be prevented from decreasing. Next, how the unique shape of the ceramic forming part 10 is set will be described.

[0021] First, the reference point P, horizontal axis H, vertical axis V, look-down angle θ, and reference line B shown in the appropriate drawings will be explained.

[0022] The reference point P is determined in advance based on the driver's seat of the vehicle 1, and is a position (coordinate) corresponding to the head of the driver 2 sitting in the driver's seat. Specifically, the reference point P in this embodiment is "point V2" indicating "reference coordinates for the design seat back angle" described in Annex JA of the test method for automotive safety glass (JIS R3212:2015) in the Japanese Industrial Standards (JIS).

[0023] The horizontal axis H is an axis (parallel to the X-axis) that passes through the reference point P and extends horizontally. The vertical axis V is an axis (parallel to the Z-axis) that passes through the reference point P and extends vertically. As shown in FIG. 1, the look-down angle θ is the angle that the horizontal axis H forms with a straight line (including the reference line B) that passes through the reference point P and the upper end 10t of the ceramic forming portion 10.

[0024] The reference line B is a line that passes through the reference point P and has a look-down angle θ of 5°. The reference line B passes through a plane parallel to the ZX plane. In this embodiment, the highest point M of the driver's seat front portion 11 is set at the intersection of the reference line B and the windshield 1a. Therefore, the reference line B is a line that passes through the reference point P and the highest point M and is inclined downward with respect to the horizontal axis H.

[0025] The display device 100 according to this embodiment satisfies a condition (hereinafter, set condition) that a locus (a set of intersections of the reference line B rotated around the vertical axis V and the windshield 1a) formed by the intersection of the reference line B rotated around the vertical axis V and the windshield 1a shown in Figs. 3 and 4 is the upper limit of the ceramic formation portion 10. The locus being the upper limit of the ceramic formation portion 10 includes not only (i) the locus being the upper end 10t of the ceramic formation portion 10, but also (ii) the upper end 10t of the ceramic formation portion 10 being located at a height equal to or lower than the locus. For example, when the upper end 10t of the ceramic formation portion 10 is set according to the locus, the ceramic formation portion 10 is viewed symmetrically in the field of view of the driver 2, but is asymmetrical with respect to the virtual line S shown in Fig. 2.

[0026] In the ceramic forming part 10 that satisfies the above-mentioned setting conditions, the straight line connecting the reference point P and the upper end 12t of the front part 12 of the passenger seat is inclined downward with respect to the horizontal axis H at an angle larger than that of the reference line B. In other words, the look-down angle θ of the straight line connecting the reference point P and the upper end 12t of the front part 12 of the passenger seat (specifically, any point on the upper end 12t) is larger than the look-down angle θ (= 5°) of the reference line B.

[0027] 2, in the display device 100, the upper end 10t of the ceramic formed portion 10 is preferably formed so as to become lower in the left-right direction of the vehicle 1 as it moves away from the highest point M of the driver's seat front portion 11. This prevents the upper end 10t of the entire ceramic formed portion 10 from narrowing the light transmitting portion of the windshield 1a more than necessary, so that even when the driver 2 moves his / her line of sight in the left-right direction, the visibility of the scenery ahead can be prevented from decreasing.

[0028] The present invention is not limited to the above-described embodiment and drawings, and can be modified (including the deletion of components) as appropriate without departing from the spirit of the present invention.

[0029] In the above, the reference point P is set to the "V2 point" as described in the JIS, but the reference point P may be set by other methods. When an arbitrary downward angle θ is set within an allowable range as the upper limit of the ceramic forming portion 10 and a straight line passing through the highest point M is set as the reference line B, the intersection point of this reference line B and the horizontal axis H may be set as the reference point P. In addition, the coordinates of the center point O of the optically determined eye box 2a may be shifted by a predetermined amount in the X-axis and Z-axis directions to set as the reference point P. The reference point P may be set appropriately according to the laws and regulations of the country and region in which the vehicle 1 and the display device 100 are used.

[0030] The display device 100 described above can be described from the following viewpoints A and B.

[0031] (A1) A display device according to aspect A of the present disclosure, a ceramic formation provided in a lower end region of a vehicle windshield; a display unit located in a dashboard of the vehicle and emitting light representing an image toward the ceramic formation; the ceramic forming portion has a driver's seat front portion located in front of a driver's seat of the vehicle and a passenger's seat front portion located in front of a passenger's seat of the vehicle, The upper end of the front portion of the passenger seat is lower than the highest point of the front portion of the driver seat.

[0032] (A2) In the display device according to A1, A position that is determined in advance based on the driver's seat and corresponds to the head of the driver sitting in the driver's seat is defined as a reference point, an axis that passes through the reference point and extends horizontally is defined as a horizontal axis, and a straight line that passes through the reference point and the highest point and is inclined downward with respect to the horizontal axis is defined as a reference line. A line connecting the reference point and the upper end of the front portion of the passenger seat is inclined downward with respect to the horizontal axis at an angle greater than that of the reference line.

[0033] (B1) A display device according to aspect B of the present disclosure, a ceramic formation provided in a lower end region of a vehicle windshield; a display unit located in a dashboard of the vehicle and emitting light representing an image toward the ceramic formation; the ceramic forming portion has a driver's seat front portion located in front of a driver's seat of the vehicle, The upper end of the ceramic forming portion is formed so as to become lower in the left-right direction of the vehicle with increasing distance from the highest point in front of the driver's seat.

[0034] (B2) In the display device according to B1, A position that is determined in advance based on the driver's seat and corresponds to the head of the driver sitting in the driver's seat is defined as a reference point, an axis that passes through the reference point and extends in the vertical direction is defined as a vertical axis, and a straight line that passes through the reference point and the highest point is defined as a reference line. The locus formed by the intersection of the reference line rotated around the vertical axis and the windshield is the upper limit of the ceramic formation portion.

[0035] In the above description, descriptions of well-known technical matters have been omitted as appropriate in order to facilitate understanding of the present disclosure.

[0036] Various embodiments and modifications of the present invention are possible without departing from the broad spirit and scope of the present invention. The above-described embodiments are for the purpose of explaining the present invention and do not limit the scope of the present invention. That is, the scope of the present invention is indicated by the claims, not the embodiments. Various modifications made within the scope of the claims and the scope of the invention equivalent thereto are considered to be within the scope of the present invention. [Explanation of symbols]

[0037] 100…Display device 1...vehicle, S...virtual line 1a…windshield, 1b…dashboard 2...Driver, 2a...Eye box, O...Center point 10...ceramic forming part, 10t...upper end 11...Front of driver's seat, 11t...Top end, M...Highest point 12...Front part of passenger seat, 12t...Top end 20: display unit, 21: image display area, L: display light 30: Cylindrical body; 31: Opening P...Reference point, H...Horizontal axis, V...Vertical axis, θ...Looking down angle, B...Reference straight line

Claims

1. a ceramic formation provided in a lower end region of a vehicle windshield; a display unit located in a dashboard of the vehicle and emitting light representing an image toward the ceramic formation; the ceramic forming portion has a driver's seat front portion located in front of a driver's seat of the vehicle and a passenger's seat front portion located in front of a passenger's seat of the vehicle, The upper end of the front part of the passenger seat is lower than the highest point of the front part of the driver seat. Display device.

2. A position that is determined in advance based on the driver's seat and corresponds to the head of the driver sitting in the driver's seat is defined as a reference point, an axis that passes through the reference point and extends horizontally is defined as a horizontal axis, and a straight line that passes through the reference point and the highest point and is inclined downward with respect to the horizontal axis is defined as a reference line. A straight line connecting the reference point and the upper end of the front part of the passenger seat is inclined downward with respect to the horizontal axis at an angle greater than that of the reference line. The display device according to claim 1 .

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