JPH08286625A - Remote display device for vehicle - Google Patents

Abstract

PURPOSE: To make a displayed image easily visible even through the image is visible from points other than the eye point at the driver's seat by providing an enlarging optical means whose enlargement ratio in the right-and-left direction and the up-and- down direction of the displayed image is in a specified range. CONSTITUTION: A virtual image obtained by enlarging the display screen 12 of a display unit 11 to 1.6-fold one in the up-and-down direction and 2.5-hold one in the right-and-left direction by a concave mirror 15 and a cylindrical lens part 14 is formed. Since the displayed image 20 is visible from a driver's seat position on the position of the eye point P is enlarged to 1.6-fold one in the up-and-down direction and 2.5-fold one in the right-and-left direction. high-quality display can be performed with wide feeling and the displayed image can be very easily visible. When the image is visible recognized from a passenger seat, the image 20 is visible from an inclined direction with respect to an optical axis 15a, so that the distortion of the image 20 is visible in a state where it is enlarged; however, the distortion in the up-and-down direction is restrained small because the image 20 is enlarged to 1.6-fold one in the up-and-down direction. The image 20 is enlarged to 2.5-fold one in the right-and-left direction, so that the distortion is enlarged in the right-and-left direction, but it does not matter because it is corrected by the work of the brain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a far display device for a vehicle for enlarging and forming a display image on a display surface of a display device such as a meter at a far position in front of an occupant.

[0002]

2. Description of the Related Art Conventionally, a far display device for a vehicle shown in FIG. 21 has been known. In FIG. 21, 1 is a display for displaying information such as speedometer, tachometer, fuel gauge and the like, 2 is a half mirror and 3 is a concave mirror. The light flux from the display surface 1a of the display 1 passes through the half mirror 2 and reaches the concave mirror 3, and the display image of the display surface 1a magnified by the concave mirror 3 is formed above the concave mirror 3 as a virtual image. The light flux from this display image is reflected by the half mirror 2 and travels toward the driver's eye point.

The display surface 1 is reflected by the half mirror 2.
The display image 1b of a is formed at a distant position in front of the driver. For this reason, the driver visually recognizes the enlarged display image 1b in the distance, and the display image 1b becomes very easy to see.

The character size in the display image 1b is set so as to be within the viewing angle of the driver, and the size of the display image 1b is set within the driver's eye range and binocular.

[0005]

However, in such a vehicle distant display device, the optical axis 5 is set so as to pass through the eye point of the driver. Therefore, when viewing the display image 1b of the display surface 1a from a position other than the eye point, for example, from the passenger seat, the display image 1b is viewed from a position greatly deviated from the optical axis 5, and moreover, from the display surface 1a to the concave mirror 3. The distance is different when viewed from the driver's eye point position and when viewed from the passenger seat. Therefore, the display image 1b is distorted, and the larger the magnification is, the larger the distortion of the display image 1b is.

Distortion in the left-right direction is corrected by the action of the brain, so that the distortion in the left-right direction is not so noticeable, but the strain in the up-down direction is not corrected by the action of the brain, and as a result, the display image 1b is very difficult. There was a problem that it was difficult to see.

Further, a distant display device in which a cylindrical lens is arranged between the display 1 and the half mirror 2 to reduce the vertical enlargement ratio and the left and right enlargement ratios (see Japanese Patent Application Laid-Open No. 4-103437). However, the image displayed by this distant display device is only set so that the driver can easily see it, and the case of viewing from the passenger seat is not considered. Therefore, when viewed from the passenger seat, there is a problem that the displayed image is very difficult to visually recognize.

An object of the present invention is to provide a distant display device for a vehicle in which a display image can be easily viewed even when viewed from a position other than an eye point of a driver's seat.

[0009]

In order to achieve the above object, the present invention provides a display device and an enlarged display optical member for forming a display image on the display surface of the display device at a distant position in front of an occupant. A distant display device for a vehicle, which is provided with a magnifying optical means for increasing the horizontal magnification of the displayed image to 1.2 to 2.5 and the vertical magnification to 1.2 to 1.6. It is characterized by being provided.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a far display device for a vehicle according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 10 is an instrument panel, and 11 is an indicator provided in the instrument panel 10.

The display 11 displays information on each instrument such as a speedometer, a tachometer, and a fuel gauge on the display surface 12.
Reference numeral 13 denotes a half mirror, an upper surface 13a of the half mirror 13 is a flat surface, and a cylindrical lens portion (enlarging optical means) 14 is formed on a lower surface 13b thereof. The cylindrical axis (not shown) of the cylindrical lens portion 14 is inclined in the same direction as the inclination direction of the upper surface 13a.
That is, the cylindrical lens portion 14 is configured to magnify only the horizontal direction of the display surface 12.

Reference numeral 15 denotes a concave mirror (magnifying display optical member) for magnifying and displaying the display surface 12 of the display device 11. The concave mirror 15 alone forms a virtual image by magnifying the display surface 12 horizontally and vertically by a factor of 1.6. The concave mirror 15 and the cylindrical lens portion 14 make the display surface 12 1.
A virtual image is formed which is magnified 6 times and 2.5 times in the left-right direction. The optical axis 15a of the concave mirror 15 is set so as to pass through the eyepoint P by the reflection of the half mirror 13. Reference numeral 16 denotes a dustproof transparent cover.

Next, the operation of the above embodiment will be described.

The luminous flux emitted from the display surface 12 of the display 11 passes through the half mirror 13 and reaches the concave mirror 15,
Further, the light is reflected by the concave mirror 15. The reflection of the concave mirror 15 forms a virtual image in which the display surface 12 is magnified 1.6 times vertically and horizontally, but since the cylindrical lens portion 14 is formed in the half mirror 13, the virtual image is vertically 1. 6 times, 2.5 times in the left-right direction.

The light flux from this virtual image is reflected by the upper surface 13a of the half mirror 13 and reaches the eye point P. The display image 20 based on this virtual image is formed behind the half mirror 13.

The display image 20 visually recognized from the driver's seat position which is the position of the eyepoint P is 1.6 in the vertical direction.
Since it is magnified twice and 2.5 times in the left-right direction, it gives a wide feeling and a high quality display, which is very easy to see. Here, the horizontal direction is set to 2.5 times because extraneous light enters the display image 20 and becomes difficult to see when the magnification is increased to 2.5 times or more.

When viewed from the passenger seat, the display image 2
Since 0 is viewed from an oblique direction with respect to the optical axis 15a, the distortion of the display image 20 appears to be large, but the display image 20 is magnified 1.6 times in the vertical direction. , Its vertical distortion can be kept small. Also, since it is magnified 2.5 times in the left-right direction, the distortion in the left-right direction becomes large, but it is corrected by the function of the brain, so it does not bother me so much. It makes it very easy to see.

In the above-described embodiment, the vertical and horizontal magnifications are changed by the cylindrical lens portion 14 formed on the lower surface of the half mirror 13, but the vertical and horizontal curvatures of the concave mirror 15 are changed without providing the cylindrical lens portion 14. The vertical magnification may be 1.6 and the horizontal magnification may be 2.5 by changing the ratio.

FIG. 3 shows another embodiment. In FIG. 3, reference numeral 30 denotes a half concave mirror (cylindrical mirror) whose upper surface 31 is a cylindrical concave portion. The half concave mirror (cylindrical mirror) 30 expands only in the left-right direction and does not expand in the up-down direction. The concave mirror 15 and the half concave mirror 30 enlarge the display surface 12 of the display 11 by 1.6 times in the vertical direction and 2.5 times in the horizontal direction.

Next, the case where the display image 20 is visually recognized from the driver's seat and the passenger's seat by changing the vertical and horizontal magnifications will be described.

In the case of point A shown in FIG. 4, that is, when the image is enlarged 1.2 times in the vertical direction and 1.2 times in the horizontal direction,
FIG. 5 shows the display image 20 viewed from the driver's seat, and FIG. 6 shows the display image 20 viewed from the passenger seat. As shown in FIG. 5, the display image 20 is magnified 1.2 times in the left, right, up and down directions, so that it is easy to see. Also, when viewed from the passenger seat, FIG.
As shown in FIG.
Distortion in the vertical and horizontal directions of is small, making it easy to see.

When the image is enlarged 1.6 times in the vertical direction and 1.2 times in the horizontal direction (point B), the display image 20 visually recognized from the driver's seat is shown in FIG.
Is shown in FIG. As shown in FIG. 7, the display image 20 is magnified 1.6 times vertically and 1.2 times horizontally so that it is easy to see. Further, when viewed from the passenger seat, as shown in FIG. 8, since the vertical magnification is not so large, the display image 2
The vertical strain of 0 is small and easy to see.

FIG. 9 shows the display image 20 seen from the driver's seat and FIG. 9 shows the display image 20 seen from the passenger's seat when the image is enlarged 1.6 times in the vertical direction and 1 × in the horizontal direction (in the case of point C). Shown in 10. As shown in FIG. 9, the display image 20 is 1
Since it is double, the display image 20 is small and not easy to see.
Further, when viewed from the passenger seat, the distortion is small, but the display image 20 is still small and not easy to see.

When magnified 1.6 times in the vertical direction and 2.5 times in the horizontal direction (point H), the display image 20 visually recognized from the driver's seat is shown in FIG.
0 is shown in FIG. As shown in FIG. 11, the display image 20 is magnified 2.5 times horizontally and 1.6 times vertically so that it is large and very easy to see. Further, when viewed from the passenger seat, as shown in FIG. 12, one instrument is partially cut off, but the display image 20 is large, and since the vertical magnification is not so large, the vertical direction of the display image 20 is reduced. The distortion is small and it is very easy to see.

When magnified 1.6 times in the vertical direction and 3.0 times in the horizontal direction (point K), the display image 20 visually recognized from the driver's seat is shown in FIG. 14 shows. As shown in FIG. 13, the display image 20 viewed from the driver's seat becomes large, but when viewed from the passenger seat,
As shown in FIG. 14, only a part of one instrument can be seen. Further, the left side of the display image 20 is greatly distorted vertically and horizontally, so that the display image 20 becomes very difficult to see.

FIG. 15 shows the display image 20 seen from the driver's seat and FIG. 15 shows the display image 20 seen from the passenger's seat when the image is enlarged 1.8 times vertically and 2.5 times horizontally (point I). 16 shows. As shown in FIG. 15, the display image 20 viewed from the driver's seat becomes large, but when viewed from the passenger seat,
The vertical strain is large, and as shown in FIG.
Since the left side of the display image 20 is greatly distorted vertically and horizontally, the display image 20 becomes very difficult to see.

When the image is enlarged 1.2 times in the vertical direction and 2.5 times in the horizontal direction (in the case of point J), the display image 20 visually recognized from the driver's seat is shown in FIG.
0 is shown in FIG. As shown in FIG. 17, the display image 20 is magnified 2.5 times horizontally and 1.2 times vertically so that it is large and very easy to see. Further, when viewed from the passenger seat, as shown in FIG. 18, one of the instruments appears to be partially cut off, but the display image 20 is large and the vertical magnification is not so large. The distortion is small and it is easy to see.

FIG. 19 shows a display image 20 visually recognized from the driver's seat when the image is enlarged 1.0 times vertically and 2.5 times horizontally (point L).
0 is shown in FIG. As shown in FIG. 19, the display image 20 is magnified 2.5 times to the left and right, which makes it easy to see.

However, when viewed from the passenger seat, FIG.
As shown in FIG. 5, the display images 20 are very difficult to see because the two instruments arranged on the left and right appear to be connected.

From the above, the display image 20 visually recognized from the driver's seat and the passenger's seat becomes easy to see if the magnification is within the range of the diagonal lines shown in FIG.

[0032]

According to the present invention, the horizontal enlargement ratio is 1.2 to 2.5 and the vertical enlargement ratio is 1.2 to 1.6. Even if
The display image is magnified horizontally and vertically, and since the vertical distortion is small, the display image is very visible.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a far display device for a vehicle according to the present invention.

2 is a perspective view showing a schematic arrangement relationship of optical members of the far display device for a vehicle in FIG. 1. FIG.

FIG. 3 is an explanatory diagram of another embodiment.

FIG. 4 is an explanatory diagram showing vertical and horizontal magnifications.

FIG. 5 is an explanatory diagram of a display image viewed from the driver's seat.

FIG. 6 is an explanatory diagram of a display image visually recognized from a passenger seat.

FIG. 7 is an explanatory diagram of a display image viewed from the driver's seat.

FIG. 8 is an explanatory diagram of a display image viewed from a passenger seat.

FIG. 9 is an explanatory diagram of a display image viewed from the driver's seat.

FIG. 10 is an explanatory diagram of a display image visually recognized from a passenger seat.

FIG. 11 is an explanatory diagram of a display image viewed from the driver's seat.

FIG. 12 is an explanatory diagram of a display image viewed from the passenger seat.

FIG. 13 is an explanatory diagram of a display image viewed from the driver's seat.

FIG. 14 is an explanatory diagram of a display image viewed from the passenger seat.

FIG. 15 is an explanatory diagram of a display image viewed from the driver's seat.

FIG. 16 is an explanatory diagram of a display image viewed from the passenger seat.

FIG. 17 is an explanatory diagram of a display image viewed from the driver's seat.

FIG. 18 is an explanatory diagram of a display image viewed from the passenger seat.

FIG. 19 is an explanatory diagram of a display image viewed from the driver's seat.

FIG. 20 is an explanatory diagram of a display image viewed from the passenger seat.

FIG. 21 is a cross-sectional view showing a configuration of a conventional vehicle distant display device.

[Explanation of symbols]

 11 display device 12 display surface 14 cylindrical lens (magnifying optical means) 15 concave mirror (magnifying display optical member) 20 display image

Claims (3)

[Claims] 1. A far display device for a vehicle, comprising: a display device; and a magnifying display optical member for enlarging and forming a display image on a display surface of the display device at a distant position in front of an occupant. The far-distance display device for a vehicle, which is provided with a magnifying optical means for adjusting the lateral magnification of 1.2 to 2.5 and the vertical magnification of 1.2 to 1.6. 2. A display device, a concave mirror for magnifying and reflecting a display image on a display surface of the display device, a light flux of the display image which is arranged between the display device and the concave mirror and which is reflected by the concave mirror. A far-distance display device for a vehicle, comprising a half mirror for reflecting toward an occupant, wherein the half mirror comprises a cylindrical lens for enlarging in the left-right direction, and the cylindrical lens and the concave mirror enlarge in the left-right direction. The ratio is 1.2 to 2.5, and the vertical enlargement ratio is 1.
A distant display device for a vehicle characterized by having a size of 2 to 1.6. 3. A display device, a concave mirror for magnifying and reflecting a display image on a display surface of the display device, a luminous flux of the display image reflected by the concave mirror and arranged between the display device and the concave mirror. A far-distance display device for a vehicle, comprising a half mirror for reflecting toward an occupant, wherein a reflecting surface of the half mirror is formed in a cylindrical mirror shape that expands only in a left-right direction, and the concave mirror and the half mirror are formed. With the reflective surface, the horizontal magnification is 1.2 to 2.5, and the vertical magnification is 1.
A distant display device for a vehicle characterized by having a size of 2 to 1.6.