JP2000112378A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which displays a light beam image usable as the indicator image of an analog type quantity display with a simple configuration. SOLUTION: This device is provided with an optical element 1 and plural light sources 5 arranged on a substrate 3. The element 1 is formed by extending an approximately semicolumnar shape lens along the entire circumference of a prescribed imaginary circle. The light sources 5 are regularly arranged along the peripheral direction of the circle on the back surface side of the element 1. The distance between the element 1 and the sources 5 is set to less than the focal distance of the element 1. Thus, the light beams 7 from the sources 5 that are made incident on the element 1 are refracted on the surface of the front surface side of the element 1 and emitted. Therefore, the images (virtual images) on the light emitting surfaces of the sources 5 are expanded in the radial direction of the element 1 and generated as a needle image at a prescribed image forming position 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for optically generating a pseudo pointer.

[0002]

2. Description of the Related Art In general, in a conventional display device using a pointer, the pointer is mechanically rotated to display a vehicle speed or the like.

[0003]

However, the conventional display device requires a complicated driving mechanism for rotating the hands, and has a problem that the device configuration is complicated.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a display device capable of displaying a light beam image with a simple structure that can be used as a pointer image of an analog quantity display.

[0005]

A technical means for achieving the above object is that an optical element having a one-dimensional function as a convex lens in a predetermined direction, and a distance between the optical element and the optical element. At least one light source arranged to be smaller than the focal length of the light source, and transmitting the light from the light source to the optical element to display a light ray image extending in the predetermined direction. I do.

Preferably, the optical element substantially has a function as a substantially semi-cylindrical lens having a light condensing function in the predetermined direction, and the light source includes a light source facing the light source. It is preferred that the optical element is arranged on the optical axis.

Preferably, the optical element extends along a circumferential direction of a predetermined virtual circle, and has a function as a convex lens in a radial direction of the virtual circle. It is good to arrange a plurality of them regularly along the direction.

More preferably, the optical element comprises a plurality of micro optics obtained by subdividing the curved surface shape of a substantially semi-cylindrical lens extending along the circumferential direction of the virtual circle in the radial direction of the virtual circle. Preferably, the elements are arranged in a plane.

Further, the technical means for achieving the above object is such that a plurality of micro optical elements having a first refraction surface having a substantially arc-shaped cross section extend in parallel with each other along a predetermined arrangement direction. And an optical element formed so as to be periodically arranged in an arrangement direction perpendicular to the extending direction, and the micro optical element inside the micro optical element at both ends in the arrangement direction of the optical element. At least one light source disposed at a predetermined distance from the optical element so as to face each other, and transmitting the light from the light source to the optical element so that the first refraction of each of the micro optical elements is performed. It is preferable to display a ray image extending in the arrangement direction by refracting the light by a surface.

Further, preferably, the light source is disposed so as to face a center between the micro optical elements at both ends in the arrangement direction, and the first refraction surface of each of the micro optical elements is It is good to be formed so that it may become symmetrical in the arrangement direction on both sides in the arrangement direction of the central part with respect to the center part.

Preferably, the plurality of micro optical elements are provided on a front side of the plate-shaped element main body of the optical element which is not opposed to the light source, and a back surface of the element main body opposed to the light source. It is preferable that a convex lens portion having a one-dimensional function as a convex lens in the arrangement direction be provided on the side.

Further, preferably, the plurality of micro optical elements of the optical element extend in parallel with each other along a circumferential direction of a predetermined virtual circle, and periodically extend in a radial direction of the virtual circle. It is preferable that the light sources are formed so as to be arranged on concentric circles, and the plurality of light sources are regularly arranged along the circumferential direction.

Preferably, the plurality of micro optical elements of the optical element extend in parallel with each other along a circumferential direction of a predetermined virtual circle, and periodically extend in a radial direction of the virtual circle. A plurality of light sources are regularly arranged along the circumferential direction, and the display device is arranged between the optical element and the light source in the circumferential direction. The light from each of the light sources, which are disposed along and incident on the first refraction surface of each of the micro optical elements, is incident from the outer peripheral side of the plurality of micro optical elements arranged along the circumferential direction. It is preferable to further include a prism plate on which a plurality of second refraction surfaces for refracting light are formed.

Further, preferably, the plurality of minute optical elements of the optical element extend in parallel with each other along a circumferential direction of a predetermined virtual circle, and periodically extend in a radial direction of the virtual circle. It is formed on the front side of the optical element that does not face the light source so as to be arranged on a concentric circle, and the plurality of light sources are regularly arranged along the circumferential direction, and the rear side of the optical element The incident light from each of the light sources is incident on the first refraction surface of each of the micro optical elements from the outer peripheral side of the plurality of micro optical elements arranged along the circumferential direction. Multiple refracted second
Is preferably formed along the circumferential direction.

Preferably, the plurality of micro optical elements of the optical element extend in parallel with each other along a circumferential direction of a predetermined imaginary circle, and periodically extend in a radial direction of the imaginary circle. A plurality of light sources are regularly arranged along the circumferential direction, and the display device is arranged between the optical element and the light source in the circumferential direction. The light from each of the light sources, which are disposed along and incident on the first refraction surface of each of the micro optical elements, is incident from the outer peripheral side of the plurality of micro optical elements arranged along the circumferential direction. It is preferable to further include a reflection member for reflecting the light.

Still preferably, the reflecting member reflects the light from each of the light sources toward the outer periphery of the plurality of micro optical elements, and the first reflecting member reflects the light. A second reflector may be provided that reflects the light in the inner circumferential direction of the plurality of micro optical elements and makes the light enter the first refraction surface of each of the micro optical elements from the outer circumferential side.

Preferably, the second reflector is:
The mirror may be a convex mirror in a radial direction extending outward from the center of the virtual circle.

Further, preferably, each of the micro optical elements has a substantially semicircular cross-sectional shape.

Preferably, each of the micro optical elements has a substantially fan-shaped cross-sectional shape obtained by dividing a circle into four equal parts in the radial direction.

Further, it is preferable that the light emitting surface of the light source is tapered in width toward the outer end parallel to the predetermined direction or the arrangement direction.

[0021] Preferably, the optical element is made of a transparent resin colored in a predetermined color.

Still preferably, the display device displays the quantity corresponding to the display position by displaying the light image at a predetermined display position using the light image as a pointer. It is preferable to further include an index unit which is disposed at a depth position substantially the same as the display position of the light beam image and is provided with an index for reading the corresponding quantity based on the display position of the light beam image.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment FIG. 1 is a cross-sectional view of a display device according to a first embodiment of the present invention, FIG. 2 is a plan view of the display device, and FIG. 3 is an instrument panel part of a vehicle. It is a figure showing the state installed in.

This display device comprises an optical element 1, a plurality of light sources 5 arranged on a substrate 3, and a control unit (not shown) for individually turning on and off each light source 5. The optical element 1 is a transparent member (here, a resin molded body) colored in a predetermined color, and optically extends along a circumferential direction of a predetermined virtual circle C as shown in FIG. An approximately semi-cylindrical lens is extended so as to make one revolution on a circle. The overall shape of the lens is a torus body (doughnut body) having an inner diameter of zero by a plane perpendicular to its center axis A1. It is shaped like a split. Each part of the optical element 1 having such a shape has a function as a convex lens one-dimensionally in the radial direction. In the present embodiment, the optical element 1 is disposed such that the surface having a convex lens shape that continues in the circumferential direction faces the front side.

As shown in FIG. 2, the plurality of light sources 5 are regularly circular along the circumferential direction of the virtual circle C on the rear surface side of the optical element 1 so as to be concentric with the central axis A1 of the optical element 1. Are located in For this reason, each light source 5 is arranged such that the center of the light source 5 is located on the optical axis A2 in each part of the optical element 1.

The distance between each light source 5 and the optical element 1 is set to be smaller than the focal length of the optical element 1. For this reason, the light 7 from each light source 5 is incident on the part of the optical element 1 facing the light source 5 and the optical element 1
Is refracted by the surface on the front side of the light source, and is emitted.
The image (virtual image) of the light-emitting surface is stretched in the radial direction of the optical element 1 and a pointer image 11 is formed at a predetermined image forming position 9 (see FIG. 3).
Is generated as At this time,
When the pointer image 11 is viewed from the direction of the arrow 12, the pointer image 11 is
It looks as if it is located further behind (back side) the light source 5.

Such a light source 5 includes a fluorescent display tube, an LE
D, a bulb, a liquid crystal display element (including a backlight), or an EL display element can be used.
Here, the light source 5 is configured using a fluorescent display tube.

A control unit (not shown) selects a light source 5 corresponding to a predetermined quantity value indicated by the input signal from a plurality of light sources 5 based on an input signal indicating an engine rotation speed or the like input from the outside, and lights the light source. It is made to let.

As shown in FIG. 3, the display device constructed as described above is disposed, for example, so that the optical element 1 is fitted into a display window 13a of an instrument panel 13 of the vehicle. Various quantities such as speed are displayed. A pointer image 1 to be displayed is displayed around a display window 13a of the instrument panel 13.
An index display (dial) 15 including scales, numerals, and the like for visually recognizing the quantity value indicated by 1 is provided.

With this configuration, as shown in FIG. 3, when one light source 5 corresponding to a predetermined quantity is turned on, the image of the light emitting surface of the light source 5 is stretched in the radial direction of the optical element 1. Then, the pointer image 11 extending radially from the center of the optical member 1 is displayed at an angular position corresponding to the quantity value.

As described above, according to the present embodiment, the light source 5 corresponding to the predetermined quantity to be displayed is selected from among the plurality of light sources 5 arranged in a circle, and is turned on. By using the light beam image 11 as a pointer, an analog quantity display can be performed with a simple configuration without requiring a mechanical configuration.

Further, since the plurality of light sources 5 are arranged such that the center of each light source 5 is located on the optical axis A2 of the part of the optical element 1 facing the light source 5, the image of each light source 5 is Can be efficiently expanded inward and outward in the radial direction, whereby the size of each light source 5 can be reduced.

Further, by coloring the light emitting element 1 in a predetermined color, it is possible to generate the pointer images 11 of various colors.

2. Second Embodiment FIG. 4 is a sectional view of a display device according to a second embodiment of the present invention. This display device is the same as the display device according to the first embodiment except that an optical element 21 is used instead of the optical element 1, and the same reference numerals are used for corresponding parts.

The optical element 21 according to this embodiment is a Fresnel lens that is optically equivalent to the above-described optical element 1, and has a substantially semi-cylindrical lens surface extending in the circumferential direction of the optical element 1. A plurality of micro optical elements 21a obtained by subdividing in the radial direction are periodically arranged on one surface (here, the front surface) of a disc-shaped element body 21b concentrically and in a plane. The optical element 21 is also formed of a transparent resin material colored in a predetermined color.

As described above, according to the present embodiment, the same effects as those of the first embodiment can be obtained, and the optical element 21 can be obtained.
Since the micro optical elements 21a are arranged in a plane, the optical element 21 can be made thinner, and thus the display device can be made smaller.

In the above-described first and second embodiments, the substantially semi-cylindrical lens or the plurality of micro optical elements 21a are extended so as to make one rotation on the virtual circle C. The optical elements 1 and 21 may be formed to extend in a substantially fan shape along a part of the circumference. In this case, the plurality of light sources 5 are also arranged along a part of the circumference of the virtual circle C corresponding to this.

In the first and second embodiments described above, a substantially semi-cylindrical lens or a plurality of micro-optical elements 2 are used.
Although the optical element 1a extends along the circumference of the virtual circle C, the optical elements 1 and 21 may be formed extending along a straight line or another curve. In this case, the plurality of light sources 5 are also arranged regularly along the extending direction of the substantially semi-cylindrical lens or the plurality of micro optical elements 21a.

3. Third Embodiment FIG. 5 is a sectional view of a display device according to a third embodiment of the present invention. In this display device, the same reference numerals are used for portions corresponding to the display device according to the first embodiment. This display device is installed on the instrument panel 13 of the vehicle in the same manner as the display device according to the first embodiment, and performs a predetermined quantity display such as a tachometer display and a vehicle speed display in an analog manner. .

This display device comprises an optical element 31 and a substrate 3
The light source 5 includes a plurality of light sources 5 disposed thereon, and a control unit (not shown) for individually controlling on / off of each light source 5. The optical element 31 is a transparent member (here, a resin molded body) colored in a predetermined color, and as shown in FIG. 5, one side of the disc-shaped element body 31a (here, the viewer side which is the front side). ), A plurality of micro optical elements 31b having a substantially semicircular cross-sectional shape are periodically arranged on a concentric circle (here, 0.3 mm).
mm pitch).

That is, the plurality of micro optical elements 31b are
A center portion 31c between the innermost minute optical element 31b and the outermost minute optical element 31b is a predetermined virtual circle C (FIG. 2).
), And extend in parallel with each other along the circumferential direction of the virtual circle C so as to be positioned on the circumference of the virtual circle C. Accordingly, with respect to an arbitrary point on the virtual circle C passing through the central portion 31c, each micro optical element 31b on both sides in the radial direction of the virtual circle C is symmetric in the radial direction.

Correspondingly, the plurality of light sources 5 are imaginary circles on the back side of the optical element 31 so as to be concentric with the central axis A1 of the optical element 31 as in the case shown in FIG. C are regularly arranged in a circular shape along the circumferential direction of C. For this reason, as shown in FIG. 5, each light source 5 is such that the central portion of the light source 5 has the innermost minute optical element 31
It is arranged at a position facing the center 31c of the optical element 31b and the outermost minute optical element 31b. The distance between each light source 5 and the optical element 1 is set to a predetermined size. Also,
A light source similar to that of the first embodiment is used as the light source 5.

A control unit (not shown) selects a light source 5 corresponding to a predetermined quantity value indicated by the input signal from a plurality of light sources 5 based on an input signal indicating an engine rotation speed or the like input from the outside. It is made to let.

In the display device configured as described above, FIG.
As shown in FIG. 5, when light 7 emitted radially from any one of the light sources 5 passes through a portion of the optical element 31 facing the light source 5, the light 7 has a circular arc shape on the surface of the plurality of micro optical elements 31b on the front side. The light is refracted in various directions by the refraction surface (first refraction surface) and is emitted to the front side of the optical element 31. For this reason,
Light 7 emitted from a region where the light source 5 illuminated spreads from both sides of the optical element 31 facing the optical element 31 to both sides in the radial direction of the optical element 31 is visually recognized by a viewer. An extended light beam image (pointer image) 11 similar to that of FIG. 3 described above is generated at a predetermined image forming position 33. In the present embodiment, the pointer image 11 is formed at the position where the light source 5 is provided. The radial length of the generated light image 11 is much larger than the radial size of the light source 5, and the small light source 5 can provide a large pointer image 11.

Thus, as in the case of FIG. 3 described above, when one light source 5 located at an angular position corresponding to a predetermined quantity value is turned on, the center of the optical element 5 corresponds to the light source 5. Pointer image 11 extending radially in the direction of the angle
Is displayed.

As described above, according to the present embodiment, the light source 5 corresponding to the predetermined quantity to be displayed is selected from among the plurality of light sources 5 arranged in a circle, and is turned on. By using the light beam image 11 as a pointer, an analog quantity display can be performed with a simple configuration without requiring a mechanical configuration.

Each of the light sources 5 arranged in a circle is arranged so as to face the center 31 c between the innermost minute optical element 31 b and the outermost minute optical element 31 b of the optical element 31. At the same time, with respect to an arbitrary point on the virtual circle C passing through the central portion 31c, each micro optical element 31b on both sides in the radial direction of the virtual circle C is symmetric in the radial direction.
By effectively utilizing the plurality of micro-optical elements 31b, it is possible to generate the pointer image 11 extending from the center portion 31c to both sides in the radial direction. As a result, the size of the light source 5 can be reduced.

Further, since each light source 5 is disposed so as to correspond to the radial center portion 31c of the plurality of micro optical elements 31b of the optical element 31, the light source 5 is formed on the substrate 3 on which the light source 5 is circularly disposed. The outer diameter can be made smaller than the outer diameter of the optical element 31, whereby the size of the display device can be reduced.

Further, by coloring the optical element 31 in a predetermined color, it is possible to generate the pointer images 11 of various colors.

4. Fourth Embodiment FIG. 6 is a sectional view of a display device according to a fourth embodiment of the present invention. This display device is the same as the display device according to the third embodiment except that an optical element 41 is used instead of the optical element 31, and the same reference numerals are used for corresponding parts.

The optical element 41 according to the present embodiment is a transparent member (here, a resin molded body) colored in a predetermined color, and as shown in FIG. A plurality of micro-optical elements 41b having a substantially fan-shaped cross-sectional shape obtained by dividing a circle into four in the radial direction are periodically arranged on a concentric circle (here, 0 on the viewer side which is the front side). (At a pitch of .15 mm).

However, the innermost minute optical element 41b
With respect to a central portion 41c between the micro-optical element 41b and the outermost micro-optical element 41b, the arc-shaped refraction surfaces (first refraction surfaces) of the respective micro-optical elements 41b on both radial sides of the central portion 41c are symmetrical in the radial direction. The micro optical elements 41b located on the inner peripheral side of the central portion 41c are arranged so that their arc-shaped refraction surfaces face the inner peripheral side so as to be arranged in the state, and are arranged on the outer peripheral side of the central portion 41c. Is arranged such that the arc-shaped refraction surface faces the outer peripheral side. In addition,
The arrangement relationship between each light source 5 and the optical element 41 is the same as in the case of the third embodiment.

The plurality of micro optical elements 41b of the optical element 41 optically act on the light 7 from each light source 5 in the same manner as the plurality of micro optical elements 31b according to the third embodiment. A pointer image 11 is generated.

As described above, according to the present embodiment, the third
The same effect as the embodiment can be obtained, and the optical element 4
Since each micro optical element 41b has a substantially fan-shaped cross-sectional shape obtained by dividing a circle into four in the radial direction, the cross-sectional shape of each micro optical element 41b is substantially semicircular. As compared with the case, the minute optical elements 41b can be arrayed at twice the array density, whereby the pointer image 11 that smoothly extends in the radial direction of the optical element 41 with high luminance can be generated. As a result, the display quality of the display device can be improved.

5. Fifth Embodiment FIG. 7 is a sectional view of a display device according to a fifth embodiment of the present invention. This display device is the same as the display device according to the fourth embodiment except that the shape of the back surface side of the optical element 41 facing the light source 5 is a predetermined lens shape. Use the sign.

In the present embodiment, one side of the optical element 41 in the radial direction is
A convex lens portion 41 having a function as a convex lens in a three-dimensional manner
d is provided. The convex lens portion 41d has a configuration in which a substantially arc-shaped refracting surface whose portion opposed to the central portion 41c protrudes most rearward is connected in the circumferential direction of the imaginary circle C about a central axis A1. I have.

Here, the convex lens portion 4 having a refracting surface continuously connected in an arc shape in the radial direction of the optical element 41 is used.
1d, a minute optical element (21a) obtained by subdividing the refraction surface of the convex lens portion 41d in the radial direction of the optical element 41 is periodically concentrically arranged as shown in FIG. To form a convex lens portion 41d,
The optical element 41 may be thinned.

With such a configuration, the light 7 radially emitted from each light source 5 is transmitted to the central portion 4 of the plurality of micro optical elements 41b by the convex lens portion 41d on the back surface of the optical element 41.
After the optical path is changed to the 1c side, a plurality of micro optical elements 41
b.

As described above, according to the present embodiment, the fourth
The same effect as that of the embodiment can be obtained, and the light 7 radially emitted from the light source 5 by the convex lens portion 41d of the optical element 41 can be transmitted to the central portion 41 of the plurality of micro optical elements 41b.
Since the light can be condensed on the c side and guided to each minute optical element 41d, the brightness of the pointer image 11 can be increased, and the distance between the light source 5 and the optical element 41 can be shortened. The device can be downsized.

In the third to fifth embodiments, the plurality of micro optical elements 31b and 41b are extended so as to make one rotation around the central axis A1 in the circumferential direction of the virtual circle C.
The optical elements 31 and 41 may be formed to extend in a substantially fan shape along a part of the circumference of the virtual circle C. In this case, the plurality of light sources 5 are also arranged along a part of the circumference of the virtual circle C corresponding to this.

In the third to fifth embodiments, the plurality of micro optical elements 31b and 41b extend along the circumference of the imaginary circle C, but extend along a straight line or another curve. Alternatively, the optical elements 31 and 41 may be formed. In this case, the plurality of light sources 5 are also regularly arranged along the extending direction of the plurality of micro optical elements 31b and 41b.

FIG. 8 is a diagram showing a modification of the light source 5 according to each of the above embodiments. In this modification, the light emitting surface of each light source 5 is positioned in the direction of the tip, that is, the optical elements 1, 21, 3
The widths of the tapered portions 1 and 41 are tapered outward in the radial direction. As a result, in this modification, as shown in FIG. 9, it is possible to generate the pointer image 11 whose width is tapered toward the distal end side, and as a result, the visibility of the pointer image 11 is improved. be able to.

FIG. 10 is a partially enlarged view showing the arrangement of the light source 5 according to each of the above-described embodiments, and FIG.
12 is a diagram showing a movement pitch P of the pointer image 11 according to the arrangement of FIG. 12, FIG. 12 is a partially enlarged view showing a modification of the arrangement of the light source 5 according to each of the above-described embodiments, and FIG. FIG. 7 is a diagram showing a movement pitch P of the pointer image 11 according to the arrangement of FIG.

As shown in FIG. 10, when a plurality of light sources 5 are arranged in a single circular shape, there is a limit in reducing the width of the light sources 5 along the circumferential direction and the interval between the light sources 5. The movement pitch P of the pointer image 11 cannot be made smaller than the limit.

Therefore, as shown in FIG. 12, by arranging a plurality of light sources 5 on a concentric circle in a multiplexed (here, double) manner, the width of the light sources 5 along the circumferential direction and the interval between the light sources 5 are varied. Beyond the limit, the moving pitch P of the pointer image 11 can be reduced as shown in FIG.
The pointer image 11 can be smoothly moved in the circumferential direction and displayed. In the example of FIG. 13, the moving pitch P is half that of the case of FIG.

When a plurality of light sources 5 are circularly arranged on a concentric circle as described above, the plurality of light sources 5 are arranged at positions shifted from each other in the circumferential direction by an angle corresponding to a desired moving pitch P. And each light source 5 is individually turned on one by one.

6. Sixth Embodiment Display devices according to sixth to ninth embodiments described below are improvements of the display devices according to the third to fifth embodiments described above, and FIG. 14 illustrates the improvements. FIG.

As shown in FIG. 14, in the display devices according to the third to fifth embodiments, detailed factors are unknown,
The display position of the pointer image 11 shifts left and right in the circumferential direction due to the relationship between the angle of incidence of the light 7 from each light source 5 on each of the optical elements 31 and 41 of the optical elements 31 b and 41 b and the viewpoint position of the viewer. At the same time, the leading end of the pointer image 11 may be curved right and left, and it may be difficult to read the quantity value such as the vehicle speed corresponding to the pointer image 11.

In the example shown in FIG. 14, when the light source 5 for generating the pointer image 11 extending right above the center is turned on, the display surface is moved from the front direction A, the left direction B and the right direction C. The display state (view) of the pointer image 11 when viewed is shown. The pointer image 11a is viewed from the front direction A, and the pointer image 11b is viewed from the left direction B. , The pointer image 11c is the one seen from the right direction C. Thus, when the display surface is viewed from the front direction A, the pointer image 11 is visually recognized in a correct display state. However, when the display surface is viewed from the left direction B and the right direction C, the pointer image 11 is displayed. Is shifted left and right in the circumferential direction, and the tip of the pointer image 11 is curved left and right and is visually recognized.

Then, as a result of trial and error, in order to prevent such a shift and bending of the display position of the pointer image 11, the light source 5 is disposed outside the outermost minute optical elements 31b and 41b. It has been found that the light 7 from the light source 5 should be incident from the outer peripheral side of each of the micro optical elements 31b and 41b. However, the light source 5 is moved to the outermost minute optical element 31.
If it is arranged outside of b and 41b, there is a problem that the device configuration becomes large.

Therefore, in each of the embodiments described below,
With the light source 5 disposed inside the outermost micro optical elements 31b, 41b, the light 7 from the light source 5 is transmitted from the outer peripheral side to each of the micro optical elements 31b, 4 without increasing the size of the device configuration.
1b.

FIG. 15 is a sectional view of a display device according to a sixth embodiment of the present invention, and FIG. 16 is an enlarged sectional view of a main part of the display device of FIG. In this display device, portions corresponding to those of the display device according to the third embodiment are denoted by the same reference numerals, and description thereof is omitted.

In this display device, a plurality of minute optical elements 51b for generating the light beam image 11 are provided on the front side of the optical element 51, and the light source 5 is provided on the rear side of the optical element 51.
In order to convert the angle of incidence of light 7 from each of the micro-optical elements 51b, a plurality of micro-optical elements 5
1c, a plate-shaped prism plate 53 provided with a plurality of micro optical elements 53b and 53c on both front and rear surfaces is provided separately from the optical element 51.

The optical element 51 is a transparent member (a resin molded body in this case) colored in a predetermined color. As shown in FIG. 15, a circular shape is formed on the front side of a disk-shaped element body 51a in the radial direction. A plurality of micro-optical elements 51b having a substantially fan-shaped cross-sectional shape obtained by dividing into four equal parts are periodically formed on a concentric circle at a predetermined arrangement pitch P (see FIG. 16).
Here, the arrangement pitch P is set to 0.15 mm.

In the present embodiment, since the light 7 from each light source 5 enters each micro optical element 51b from the outer peripheral side, all the micro optical elements 51b correspond to the pointer image 11b.
Arc-shaped outer peripheral surface (first refracting surface) 51 for generating
d (see FIG. 16) is disposed so as to face the inside of the optical element 51.

The light sources 5 are arranged at a predetermined pitch in the circumferential direction so as to face substantially the center between the outermost minute optical element 51b and the innermost minute optical element 51b of the optical element 51. Has been established. Here, the radius R1 of the optical element 51 is 50 mm. Correspondingly, the light source 5 has a radius R2
Are arranged such that the center thereof is located on a circle of 20 mm.

The prism plate 53 is a transparent member (here, a resin molded body), and as shown in FIG.
A plurality of micro optical elements 53b and 53c are provided on the front and rear surfaces of a disk-shaped main body 53 having the same diameter as that of the optical element 51, and are arranged adjacent to the back side of the optical element 51.

Each micro optical element 51c, 53b, 53c
As shown in FIG. 15 and FIG. 16, on the rear surface side of the optical element 51 and on the front and rear surfaces of the prism plate 53, concentric circles are periodically formed at the same arrangement pitch P as the minute optical element 51b. . Each micro optical element 51c, 53b, 53
The cross-sectional shape of c is triangular (here, right triangular), and the outer peripheral surfaces (second refracting surfaces) 51e, 53d, 53e of the optical element 51 and the prism plate 53 facing outward.
However, the traveling direction of the incident light 7 from the light source 5 is changed to the center side of the optical element 51 and the prism plate 53 by refraction.

Each of such micro optical elements 51c, 53
b and 53c are provided on the optical element 51 and the prism plate 53 located on the outer peripheral side of the plurality of light sources 5 arranged in the circumferential direction. This is because this micro optical element 51c,
53b and 53c are light 7 emitted from each light source 5 to the outside.
The light 7 emitted inward from each light source 5 enters each micro optical element 51b from the outer peripheral side without changing the traveling direction. Because.

Here, each of the micro optical elements 51c, 53b,
Each of the refraction surfaces 51e, 53d, 53e of the optical element 53c
Angles θ1, θ2, and θ3 formed by a plane perpendicular to the central axis A of No. 1
Are set to 40 °, 30 °, and 10 °, respectively.

As a result, the light 7 emitted outward from each light source 5, as shown in FIG.
By being refracted by 1c, 53b, and 53c, the traveling direction is changed inward in three steps, and the light is incident on each micro optical element 51b from the outer peripheral side at an inward incident angle.

Also, in the present embodiment, the plurality of micro optical elements 51b of the optical element 51 are used by the plurality of micro optical elements 31 according to the third embodiment for the light 7 from each light source 5.
It acts optically in the same way as b, and generates a similar pointer image 11, but in this embodiment, the light 7 from the light source 5 is
Since the micro-optical elements 51b are incident from the outer peripheral side, the pointer image 11 can be generated without any displacement of the display position and no bending of the tip as shown in FIG. 14 from any viewpoint. Can be.

As described above, according to the present embodiment, the third
The same effect as that of the embodiment can be obtained, and the pointer image 11 that extends straight from the center in an appropriate radial direction from any viewpoint can be generated.
It is possible to reliably read the quantity value corresponding to the display position of, and to improve the visibility of the display device.

Further, the light source 5 is disposed on the inner periphery of the outermost minute optical element 51b as in the third embodiment, and the added prism plate 53 has the same diameter as the optical element 51. The same effect as that of arranging the light source 5 on the outer peripheral portion of the outermost minute optical element 51b can be obtained without increasing the size of the display device, and the visibility of the pointer image 11 can be improved.

In this embodiment, each micro optical element 5
Although the traveling direction of the light 7 is changed in three stages by 1c, 53b and 53c, the minute optical elements 51c and 53c are changed.
b, 53c, one step or 2
The traveling direction of the light 7 may be changed in stages.

7. Seventh Embodiment FIG. 17 is a partial sectional view of a display device according to a seventh embodiment of the present invention. In this display device, the third and sixth
Portions corresponding to the display device according to the embodiment are denoted by the same reference numerals, and description thereof is omitted.

In this display device, the light source 5 and the optical element 51
Are provided between the first and second reflectors 61 and 63, and the light 7 from the light source 5 is reflected by the first and second reflectors 61 and 63. , Are made to enter each micro optical element 51b from the outer peripheral side. For this reason, the minute optical element 5 on the back side of the optical element 51
1c and the prism plate 53 are omitted.

Each of the reflectors 61 and 63 has a ring-like shape obtained by cutting a part of a predetermined conical surface into a ring shape. The body 63 has a larger diameter. Here, the first reflector 61 has a central portion between the inner peripheral portion and the outer peripheral portion of each light source 5.
The second reflector 63 is set such that the outer diameter of the outer peripheral portion is the same as the outer diameter of the optical element 51.

The first reflector 61 has an outwardly facing outer peripheral surface 61a serving as a reflection surface, and the second reflector 63 has
The inwardly facing inner peripheral surface 63a is a reflection surface. Optical element 5 of reflecting surfaces 61a and 63a in both reflectors 61 and 63
The inclination angles θa and θb of the 1 with respect to the central axis A1 are set to 45.0 ° and 37.6 °, respectively.

The first and second reflectors 61 and 63 are arranged on the front side of the light source 5 so as to be concentric with the plurality of micro optical elements 51b. Thereby, the first reflector 6
1 is disposed such that its reflection surface 61a faces each light source 5, and the second reflector 63 is provided with its reflection surface 63a.
Are arranged so as to face the reflection surface 61a of the first reflector 61.

Further, between the first reflector 61 and each light source 5, the light 7 emitted from each light source 5 is prevented from entering other than the reflection surface 61 a of the first reflector 61 (ie, Light source 5
So that the light 7 does not directly enter the optical element 51),
A light shielding member 65 is provided, and light 7 from each light source 5 is provided.
Are incident on the first reflector 61 through the slit 65 a of the light shielding member 65.

With such a configuration, the light 7 emitted from each light source 5 enters the first reflector 61 via the slit 65 a of the light shielding member 65 and is reflected. The light is converted outward and is incident on the second reflector 63, is reflected by the second reflector 63, and the traveling direction is changed to inward. To be incident on.

Thus, an effect similar to that obtained by disposing the light source 5 on the outer periphery of the outermost minute optical element 51b (here, the virtual image point 67 of the light source 5) can be obtained.
In the present embodiment, the distance D1 from the virtual image point 67 of the light source 5 to the optical element 51 is set to be 40 mm.
At a position 40 mm behind.

As described above, also in the present embodiment, the same effect as that of the third embodiment can be obtained, and the pointer image 11 that extends straight from the center in an appropriate radial direction from any viewpoint is generated. Guide image 1
The quantity value corresponding to the display position of No. 1 can be reliably read, and the visibility of the display device can be improved.

The light source 5 is arranged on the inner periphery of the outermost minute optical element 51b as in the third embodiment, and the added first and second reflectors 61 and 63 are optical elements. Since the size is 51 or less, the light source 5 can be moved to the outermost minute optical element 51b without increasing the size of the display device.
The same effect as the arrangement at the outer periphery of the pointer is obtained, and the pointer image 1
1 can improve the visibility.

8. Eighth Embodiment FIG. 18 is a partial sectional view of a display device according to an eighth embodiment of the present invention. The display device according to this display device is the same as the display device according to the seventh embodiment except that the form of the second reflector 63 is changed, and corresponding portions are denoted by the same reference numerals. The description is omitted.

In this embodiment, as shown in FIG. 18, the reflecting surface 63a of the second reflector 63 is a convex mirror with respect to a radial direction extending radially obliquely rearward from the center of the plurality of micro optical elements 51b. ing. That is, as shown in FIG. 18, the longitudinal cross-sectional shape of the reflection surface 63a has a predetermined curved shape that is convex inward. Here, the vertical cross-sectional shape of the reflecting surface 63a is a shape obtained by cutting off a part of an arc 71 having a curvature radius Ra of 35 mm, but a part of a predetermined curve such as a parabola 73 or an ellipse (not shown). It is preferable to perform a predetermined spherical aberration correction with a shape like a cutout. When the spherical aberration correction is performed in this manner, the virtual image of each light source 5 can be clearly formed at the virtual image point 67, and thereby the sharp pointer image 11 can be formed. Here, the distance D1 between the virtual image point 67 and the optical element 51 is set to 18 mm.

With such a configuration, the first reflector 61
As shown in FIG. 18, the light 7 from the light source 5 reflected by the micro-optical elements 51 is reflected by the second reflector 63.
The light is reflected so as to diverge in the radial direction of b, and is incident on each micro optical element 51b at an incident angle inward from the outer peripheral side. Thus, the light 7 from the light source 5 is
Since the light is divergently reflected by the second reflector 63, even if the distance between the light source 5 and the optical element 51 is reduced, the light 7 from the light source 5 is transmitted from the center of the optical element 51 to a predetermined position. Can be made incident on all of the micro optical elements 51b distributed in the radiation direction.

As described above, also in this embodiment, the same effects as those of the seventh embodiment can be obtained, and the light 7 from the light source 5 is reflected by the second reflector 63 so as to diverge. Since it is incident on each micro optical element 51b,
The distance between the light source 5 and the optical element 51 can be reduced, and the size of the device can be reduced.

In the above-described sixth to eighth embodiments, the display device is constituted by using the disc-shaped optical element 51. However, as shown in FIGS. 19 and 20, a part of the disc-shaped optical element 51 is formed. The display device may be configured using optical elements 81 and 83 having a substantially fan-shaped shape, which can be obtained by cutting the optical element. The optical elements 81 and 83 are provided with a plurality of micro optical elements 51b similar to the optical element 51. Further, the light source 5, the minute optical element 51c, the prism plate 53, and the first and second reflectors 61 and 63 are also the optical element 8
It is arranged in a fan shape only in one section in the circumferential direction opposed to 1,83. Thus, the pointer image 11 generated by each of the optical elements 81 and 83 is formed from the outer periphery of each of the optical elements 81 and 83 toward a predetermined virtual rotation center 84.

The optical element 81 shown in FIG. 19 has a shape in which a part of the disk-shaped optical element 51 is cut into a fan shape, and the inner peripheral portion of the cut fan portion is further cut off. The height H of the device can be greatly reduced as compared with the case where the disc-shaped optical element 51 is used.

The outer shape of the optical element 83 in FIG. 20 is longer than that of the optical element 81 in FIG. 19, so that the apparatus height H can be further increased as compared with the optical element 81 in FIG. It can be made smaller.

On the other hand, as shown in FIG. 21, a conventional display device in which the hands 85 are driven to rotate mechanically is used as shown in FIG.
And a display unit 87 similar to the optical elements 81 and 83 in FIG.
Is created, the pointer 85 has a hidden portion 85a that does not appear on the display unit 87, so that the device height H is larger than the length of the pointer 85.

Therefore, the optical element 8 shown in FIGS.
By using 1, 83, the device height H can be made smaller than that of a conventional display device in which the pointer 85 is driven to rotate mechanically.

9. Ninth Embodiment FIG. 22 is a sectional view showing a configuration of a display device according to a ninth embodiment of the present invention, and FIG. 23 is a front view of a display surface of the display device in FIG. This display device is obtained by applying the display device according to the sixth embodiment to a meter indicator of a vehicle,
Portions corresponding to the display device according to the sixth embodiment are denoted by the same reference numerals.

In this display device, as shown in FIG.
An optical plate 93 (optical element) for generating the pointer image 11 and a display plate (index unit) 95 for dial display are provided inside a case body 91 opened on the front side. The opening 91 is closed by a translucent cover plate 97.

The optical plate 93 is a translucent plate (here, a resin molded body) colored in a predetermined color and has three pointer image generation areas 10 as shown in FIG.
1, 103 and 105 are provided. The center pointer image generation area 101 is for generating the pointer image 11 indicating the vehicle speed, and the left and right pointer image generation areas 103 and 10.
Reference numeral 5 is for generating a pointer image 11 indicating the remaining fuel amount and the cooling water temperature.

Each pointer image generating area 10 of the optical plate 93
A plurality of micro-optical elements 5 periodically arranged on concentric circles similar to the third embodiment are provided on the front side of 1, 103, 105.
1b is formed.

Here, the center pointer image generation area 101 is
It has the same shape as the optical element 83 of FIG. 20, and the micro optical element 51 b similar to the optical element 83 is formed.
The left and right pointer image generation areas 103 and 105 have a sector shape, and the micro-optical elements 51b formed in the respective pointer image generation areas 103 and 105 are periodically arranged concentrically with the sector shape. I have.

Correspondingly, as in the case of the third embodiment, each pointer image generating area 101, 1 of the optical plate 93 is provided.
03, 105, the pointer image generation areas 101,
Corresponding to the arrangement of the micro optical elements 51b of 103 and 105, a plurality of micro optical elements 51c periodically arranged on concentric circles are formed integrally with the optical plate 93, and each pointer image is generated. A prism plate 53 in which a plurality of micro optical elements 53b and 53c are periodically formed concentrically on both front and rear surfaces opposite to the regions 101, 103 and 105 is provided.

Each light source 5 for generating the pointer image 11 corresponds to the arrangement of each micro-optical element 51 in each of the pointer image generation areas 101, 103 and 105, as in the third embodiment. Then, each pointer image generation area 101, 103, 10
5 at a predetermined pitch in the circumferential direction.
Each light source 5 is disposed on the substrate 3, and a plurality of display segments 111 for displaying the trip meter display 107 and the odometer display 109 are also disposed on the substrate 3. The display of the display segment 111 is visually recognized through the optical plate 93 and the cover plate 97.

The pointer image generating area 101 of the optical plate 93
A display plate 95 for displaying a dial (index) 113 for reading a vehicle speed corresponding to the display position from the display position of the pointer image 11 generated by the pointer image generation area 101 is provided on the outer peripheral portion of. Is provided. The display plate 95 is a light-shielding plate-like body, in which a predetermined light-transmitting pattern corresponding to the dial 113 is formed in the light-shielding region, and a valve 115 disposed on the back side of the display plate 95. By illuminating the display plate 95, the dial 113 corresponding to the translucent pattern is illuminated and displayed on the display plate 95. Here, the valve 1 is provided in the case body 91.
A partition 91a is provided so that light from 15 does not enter the optical plate 93.

As shown in FIG. 22, the display plate 95 moves in the depth direction perpendicular to the optical plate 93.
It is arranged at a depth position substantially the same as the display position 117 of the pointer image 11 generated by the central pointer image generation area 101. Thus, the pointer image 11 and the dial 113 for displaying the speedometer are displayed on the same plane. For this reason, it is possible to prevent parallax from being generated between the pointer image 11 and the dial 113.

As described above, also in this embodiment, the same effect as that of the sixth embodiment can be obtained, and since the pointer image 11 and the dial 113 for displaying the speedometer are displayed on the same plane. Therefore, it is possible to prevent the occurrence of parallax between the two, and as a result, even if the pointer image 11 is viewed from any viewpoint, no discrepancy occurs between the pointer image 11 and the dial 113. The vehicle speed indicated by is surely visually recognized, and the visibility of the display device can be improved.

In the sixth to ninth embodiments, the light source 5 has a rectangular shape. However, the light source 5 may have a tapered shape as in the modification shown in FIG.

In the above-described sixth to ninth embodiments, the light rays 5 are arranged singly in the circumferential direction. However, as in the modification shown in FIG. 12, the light rays 5 are multiplexed in the circumferential direction. It may be provided.

[0117]

According to the present invention, light from a light source is transmitted through an optical element so that a light image extending in a predetermined direction is displayed. Thus, by using this light image as a pointer, analog quantity display can be performed with a simple configuration without requiring a mechanical configuration.

According to the second aspect of the present invention, the optical element substantially has a function as a substantially semi-cylindrical lens having a light condensing function in a predetermined direction, and the light source includes the light source. Since the light source is disposed on the optical axis of the portion of the optical element facing the light source, the image of the light source can be efficiently stretched to both sides in the predetermined direction, and the size of the light source can be reduced.

According to the third aspect of the present invention, the optical element extends along the circumferential direction of the predetermined virtual circle and has a function as a convex lens in the radial direction of the virtual circle. However, since a plurality of light sources are regularly arranged along the circumferential direction, by sequentially switching the light sources to be turned on, the display position of the light beam image can be changed in accordance with the change in the number to be displayed.

According to the fourth aspect of the present invention, the optical element is a microscopic element obtained by subdividing the curved shape of a substantially semi-cylindrical lens extending along the circumferential direction of the virtual circle in the radial direction of the virtual circle. Since the optical elements are arranged in a plane, the thickness of the optical element can be reduced, whereby the size of the display device can be reduced.

According to the fifth to eighteenth aspects of the present invention, by transmitting light from a light source to an optical element,
Since a light image extending in the arrangement direction of the plurality of micro optical elements of the optical element is displayed, by using this light image as a guide, a mechanical structure is not required and a simple structure is required. Analog quantity display can be performed.

Further, since the light source is disposed so as to face the micro optical elements inside the micro optical elements at both ends in the arrangement direction of the optical element, the light source is disposed outside the micro optical elements at both ends in the arrangement direction. As compared to the case, the optical element and the light source can be arranged in a small space, so that
The size of the display device can be reduced.

According to the sixth aspect of the present invention, the light source comprises:
The plurality of micro optical elements are arranged so as to correspond to the center between the micro optical elements at both ends in the arrangement direction, and each first refraction surface of each micro optical element is arranged in the arrangement direction of the center with respect to the center. Since both sides are formed so as to be symmetrical in the arrangement direction, it is possible to generate a light beam image extending from the center portion to both sides in the arrangement direction by effectively utilizing a plurality of micro optical elements. Can be reduced in size.

According to the seventh aspect of the present invention, the convex lens portion having a one-dimensional function as a convex lens in the arrangement direction of the plurality of micro optical elements is provided on the back surface of the element body facing the light source. Since the light emitted radially from the light source can be condensed and guided to a plurality of minute optical elements by the convex lens portion, the brightness of the light image can be increased, and the light source and the optical element can be used. Can be shortened, and the size of the display device can be reduced.

According to the eighth aspect of the present invention, the plurality of minute optical elements of the optical element extend parallel to each other along the circumferential direction of the predetermined virtual circle, and extend in the radial direction of the virtual circle. The number of light sources to be displayed is changed by sequentially switching the light sources to be lit because a plurality of light sources are regularly arranged along the circumferential direction. , The display position of the light beam image can be changed.

According to the ninth to thirteenth aspects, the light from the light source is made incident on each micro-optical element for generating a light beam image of the optical element from the outer peripheral side, so that it can be viewed from any viewpoint. Since a ray image extending straight from the virtual center in an appropriate radiation direction can be generated, the visibility of the ray image can be improved.

Further, since the light source is arranged on the inner periphery of the outermost minute optical element, the light source is arranged on the outer periphery of the outermost minute optical element without increasing the size of the display device. There is an advantage that the same effect as described above can be obtained.

According to the thirteenth aspect of the present invention, the light from the light source is reflected by the second reflector so as to diverge and is incident on each minute optical element. Can be reduced, and the device configuration can be downsized.

According to the fifteenth aspect of the present invention, each micro optical element has a substantially fan-shaped cross-sectional shape obtained by dividing a circle into four in the radial direction. Micro optical elements can be arrayed at twice the array density as compared with the case where the cross-sectional shape of the elements is substantially semicircular, thereby generating a light image with high luminance and extending smoothly in the array direction. As a result, the display quality of the display device can be improved.

According to the sixteenth aspect of the present invention, the light emitting surface of the light source is tapered toward the outer end direction parallel to the predetermined direction or the arrangement direction. It is possible to generate a light beam image tapered and narrow in width as a pointer image, and improve the visibility of the pointer image.

According to the seventeenth aspect, by coloring the light emitting element to a predetermined color, light images of various colors can be generated.

According to the eighteenth aspect of the present invention, since the pointer image is displayed on the same plane as the index portion, it is possible to prevent the occurrence of parallax between the two, and as a result, any of the viewpoints Even if the pointer image is viewed from above, there is no discrepancy between the pointer image and the index of the index portion, and the quantity value indicated by the pointer image can be reliably visually recognized, so that the visibility of the display device can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a display device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the display device of FIG.

FIG. 3 is a diagram showing a state where the display device of FIG. 1 is installed on an instrument panel of a vehicle.

FIG. 4 is a sectional view of a display device according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a display device according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a display device according to a fourth embodiment of the present invention.

FIG. 7 is a sectional view of a display device according to a fifth embodiment of the present invention.

FIG. 8 is a view showing a modified example of the light source according to the first to fifth embodiments.

9 is a diagram showing a display state when the light source of FIG. 8 is used.

FIG. 10 is a partially enlarged view showing an arrangement of a light source according to each of the embodiments.

11 is a diagram showing a movement pitch of a pointer image according to the arrangement of FIG. 10;

FIG. 12 is a partially enlarged view showing a modification of the arrangement of the light sources according to the above embodiments.

FIG. 13 is a diagram showing a movement pitch of a pointer image according to the arrangement of FIG. 12;

FIG. 14 is a diagram for describing improvements of the sixth to ninth embodiments over the third to fifth embodiments.

FIG. 15 is a sectional view of a display device according to a sixth embodiment of the present invention.

16 is an enlarged sectional view of a main part of the display device of FIG.

FIG. 17 is a partial sectional view of a display device according to a seventh embodiment of the present invention.

FIG. 18 is a partial sectional view of a display device according to an eighth embodiment of the invention.

FIG. 19 is a view showing a modification of the optical element according to the sixth to eighth embodiments.

FIG. 20 is a view showing a modified example of the optical element according to the sixth to eighth embodiments.

FIG. 21 is a diagram showing a configuration of a conventional mechanical display device.

FIG. 22 is a cross-sectional view illustrating a configuration of a display device according to a ninth embodiment of the present invention.

23 is a front view of a display surface of the display device of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical element 3 Substrate 5 Light source 11 Pointer image (ray image) 13 Instrument panel 21 Optical element 21a Micro optical element 31 Optical element 31b Micro optical element 31c Central part 41 Optical element 41b Micro optical element 41c Central part 41d Convex lens part 51 Optical element 51b, 51c Micro optical element 53 Prism plate 53b, 53c Micro optical element 61 First reflector 63 Second reflector 81, 83 Optical element 93 Optical plate 95 Display plate

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masayoshi Imoto 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5G435 AA01 AA17 BB15 CC04 FF02 FF03 GG02 GG26 GG27 LL17

Claims (18)

[Claims] An optical element having a one-dimensional function as a convex lens in a predetermined direction, and at least one light source arranged such that a distance from the optical element is smaller than a focal length of the optical element. When,
A display device, comprising: transmitting a light from the light source to the optical element to display a light ray image extending in the predetermined direction. 2. The optical element substantially has a function as a substantially semi-cylindrical lens having a light condensing function in the predetermined direction, and the light source is an optical element facing the light source. The display device according to claim 1, wherein the display device is arranged on an optical axis of a part of the element. 3. The optical element extends along a circumferential direction of a predetermined virtual circle, has a function as a convex lens with respect to a radial direction of the virtual circle, and the light source extends along the circumferential direction. The display device according to claim 1, wherein a plurality of the display devices are regularly arranged. 4. The optical element according to claim 1, wherein a plurality of minute optical elements obtained by subdividing a curved surface shape of a substantially semi-cylindrical lens extending along a circumferential direction of the virtual circle in a radial direction of the virtual circle are formed. 2. An arrangement according to claim 1, wherein
4. The display device according to any one of items 1 to 3. 5. A plurality of micro-optical elements having a first refracting surface having a substantially arc-shaped cross section extend in parallel with each other along a predetermined disposing direction, and in an arrangement direction perpendicular to the extending direction. An optical element formed so as to be periodically arranged with respect to the optical element, and a predetermined distance from the optical element so as to face the micro optical element inside the micro optical element at both ends in the arrangement direction of the optical element. At least one light source disposed apart from the light source, the light from the light source being transmitted through the optical element and refracted by the first refraction surface of each of the micro optical elements, thereby extending in the arrangement direction. A display device for displaying a light image. 6. The light source is disposed so as to face a central portion between the micro-optical elements at both ends in the arrangement direction, and the first refraction surface of each of the micro-optical elements is arranged with respect to the central portion. The display device according to claim 5, wherein the display device is formed so as to be symmetric in the arrangement direction on both sides of the central portion in the arrangement direction. 7. The plurality of micro optical elements are provided on the front side of the plate-shaped element main body of the optical element that does not face the light source, and on the back side of the element main body facing the light source. 7. The display device according to claim 5, further comprising a convex lens portion having a one-dimensional function as a convex lens in the arrangement direction. 8. The plurality of micro optical elements of the optical element extend in parallel with each other along a circumferential direction of a predetermined virtual circle, and periodically form concentric circles in a radial direction of the virtual circle. The display device according to claim 5, wherein the display device is formed so as to be arranged, and a plurality of the light sources are regularly arranged along the circumferential direction. 9. The plurality of micro optical elements of the optical element extend in parallel with each other along a circumferential direction of a predetermined virtual circle, and periodically form concentric circles in a radial direction of the virtual circle. A plurality of the light sources are regularly arranged along the circumferential direction; and the display device is arranged along the circumferential direction between the optical element and the light source. The light from each of the light sources provided is incident on the first refraction surface of each of the micro-optical elements from the outer peripheral side of the plurality of micro-optical elements arranged along the circumferential direction. The display device according to claim 5, further comprising a prism plate having a plurality of second refraction surfaces to be refracted. 10. The plurality of micro-optical elements of the optical element extend in parallel with each other along a circumferential direction of a predetermined virtual circle, and periodically form concentric circles in a radial direction of the virtual circle. It is formed on the front side of the optical element that does not face the light source so as to be arranged, and the plurality of light sources are regularly arranged along the circumferential direction. On the back side of the optical element, The incident light from each of the light sources is transmitted from the outer peripheral side of the plurality of micro optical elements arranged along the circumferential direction to the first of the micro optical elements.
The display device according to claim 5, wherein a plurality of second refraction surfaces for refracting the light so as to be incident on the refraction surface are formed along the circumferential direction. 11. The plurality of micro optical elements of the optical element extend parallel to each other along a circumferential direction of a predetermined virtual circle, and periodically form concentric circles in a radial direction of the virtual circle. A plurality of the light sources are regularly arranged along the circumferential direction; and the display device is arranged along the circumferential direction between the optical element and the light source. The light from each of the light sources provided is incident on the first refraction surface of each of the micro-optical elements from the outer peripheral side of the plurality of micro-optical elements arranged along the circumferential direction. The display device according to claim 5, further comprising a reflection member that reflects light. 12. The reflection member, comprising: a first reflector that reflects the light from each of the light sources in an outer peripheral direction of the plurality of micro optical elements; and a light source that reflects the light reflected by the first reflector. And a second reflector that reflects in the inner peripheral direction of the plurality of micro optical elements and makes the first refracting surface of each of the micro optical elements enter from the outer peripheral side. The display device according to the above. 13. The display device according to claim 12, wherein the second reflector is a convex mirror in a radial direction extending outward from a center of the virtual circle. 14. The display device according to claim 5, wherein each of the micro optical elements has a substantially semicircular cross-sectional shape. 15. The device according to claim 5, wherein each of the micro optical elements has a substantially fan-shaped cross-sectional shape obtained by dividing a circle into four in the radial direction. Display device. 16. The light-emitting surface of the light source is tapered in width in a direction toward the outer end parallel to the predetermined direction or the arrangement direction. The display device according to claim 1. 17. The optical element according to claim 1, wherein the optical element is made of a transparent resin colored in a predetermined color.
7. The display device according to any one of 6. 18. The display device displays a quantity corresponding to the display position by displaying the light image at a predetermined display position using the light image as a pointer, and displays the light image in a depth direction. The apparatus according to claim 1, further comprising: an index unit disposed at substantially the same depth position as a display position and provided with an index for reading the corresponding quantity based on the display position of the light beam image. 1
18. The display device according to any one of items 17 to 17.