JPH11219144A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of causing a floating display image to appear and disappear without any need of mechanical constitution. SOLUTION: This display device 21 has a light transmission part 5 at the center of the front concave mirror 3 of a pair of opposite concave mirrors 1 and 3 for transmitting light. In addition, light from an object laid at a prescribed position within internal space 11 surrounded by a pair of the concave mirrors 1 and 3, is thereby reflected and made to converge on an image forming position near the light transmission part 5, so that the image I of the object O is kept afloat and displayed as if floating from the inside of the internal space 11 through the light transmission part 5. Also, a shading member 23 is provided for closing the light transmission part 5. In this case, the shading member 23 is formed so that a high polymer scattered liquid crystal layer is formed between two transparent substrates having transparent electrodes. The shading member 23 is used to allow the transmission of light through the light transmission part 5, or shade the light, thereby causing the appearance and disappearance of the image I.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a counter-arranged 1
The present invention relates to a display device that uses a pair of concave mirrors to display an image of an object installed in its internal space so that it can be seen from the internal space through a light-transmitting part.

[0002]

2. Description of the Related Art FIG. 14 is a sectional view showing the structure of a conventional display device, and FIG. 15 is a plan view thereof. As shown in FIG. 14, the display device includes a pair of first and second concave mirrors 1 and 3 which are arranged to face each other with mirror surfaces 1a and 3a facing each other. The mirror surfaces 1a and 3a of the concave mirrors 1 and 3 are formed to be rotationally symmetric about the optical axis A.

The second concave mirror 3 on the front side with respect to the viewing direction
A light transmitting portion (here, a through hole) 5 for transmitting light is provided around the optical axis A, and an optical axis A on the inner surface side of the first concave mirror 1 on the back side with respect to the viewing direction.
The object O is installed in the vicinity of. Here, the light transmitting portion 5 is not limited to the through-hole, and may be configured to transmit light. For example, when a predetermined metal film is formed on the surface of a predetermined transparent member to form a concave mirror, the light transmitting portion 5 is partially formed. The light transmitting portion 5 may be formed by forming a region where a metal film is not formed.

As shown in FIG. 14, the concave surfaces 1 and 3 of the concave mirrors 1 and 3 have curved surfaces 1a and 3a, respectively.
9 is set so as to be reflected a plurality of times (here, twice) between the mirror surfaces 1a and 3a and condensed at an image forming position near the light transmitting portion 5, whereby the image I of the object O is But 1
It is formed at an image forming position near the light transmitting portion 5 so as to appear to rise from the interior space 11 surrounded by the pair of concave mirrors 1 and 3 through the light transmitting portion 5.

Light incident on the interior space 11 from the outside through the light transmitting portion 5 is reflected by the mirror surfaces 1a and 3a and condensed on the object O. The image I can be viewed with sufficient brightness.

[0006]

However, in the above-described display device, the image I of the object O is basically still displayed. In this display device, as a method of causing the image I to appear or disappear, the light transmitting portion 5 is used.
There is a method of providing a movable shutter for transmitting and blocking light passing through the light transmitting unit 5, but a mechanical configuration for opening and closing the shutter is required, and the configuration of the display device is complicated. There is a problem of becoming.

[0007] In view of the above problems, an object of the present invention is to provide a display device capable of making a floating display image appear and disappear without requiring a mechanical configuration.

[0008]

A technical means for achieving the above object is that a center part of a concave mirror on the front side of a pair of concave mirrors arranged with their mirror surfaces opposed to each other is provided.
A light-transmitting portion for transmitting light, wherein light from an object placed at a predetermined position in a space surrounded by the pair of concave mirrors is reflected between the pair of concave mirrors, and Alternatively, by condensing light at an image forming position in the vicinity thereof,
A display device that floats and displays the image of the object so that the image rises from the space through the translucent portion, wherein the light is located on an optical path of the light from the surface of the object to the image forming position. A light-shielding member that is disposed so as to block light, and that can adjust the transmittance of incident light; and that transmits and blocks the light that passes through the light-shielding member by controlling the transmittance of the light-shielding member, thereby floating. And a control unit for causing the displayed image of the object to appear and disappear.

Preferably, the light-shielding member has a predetermined liquid crystal layer sandwiched between two transparent substrates having transparent electrodes formed on surfaces facing each other, and is applied to the liquid crystal layer by the two transparent electrodes. The transmittance of the incident light changes according to a change in the applied voltage, and the control unit controls the applied voltage between the two transparent electrodes of the light shielding member, thereby controlling the light shielding. Preferably, the transmittance of the member is controlled.

Preferably, the liquid crystal layer is a polymer-dispersed liquid crystal layer in which the scattering state of incident light changes with a change in the applied voltage applied by the two transparent electrodes.

Still preferably, as the object,
A plurality of objects representing predetermined display contents are installed,
It is preferable that the light shielding member is provided with a plurality of light shielding regions corresponding to each of the objects that can individually transmit and block the light from the surface of each of the objects for each of the objects.

[0012] Preferably, the display device is sandwiched between two transparent substrates having predetermined transparent electrodes formed on surfaces facing each other, and is applied by the transparent electrodes. And a polymer-dispersed liquid crystal layer in which the scattering state of incident light changes with a change in applied voltage, and the display object as the object at the predetermined position in the space so as to be displayed in a floating manner. The installed transparent display, further comprising a light source for irradiating a predetermined illumination light toward the transparent display, the control unit, the applied voltage applied between the two transparent electrodes of the transparent display It is preferable that the apparatus further includes a function of displaying a predetermined display image on the transparent display by controlling the scattering area in which the illumination light is scattered in the transparent display.

Further, preferably, the transparent display comprises:
It is preferable that a plurality of mirrors are provided at an interval in front and rear along the optical axis of the biconcave mirror.

Preferably, the display device is mounted on a vehicle, and performs a predetermined warning display to a driver.

[0015]

FIG. 1 is a sectional view showing the structure of a display device according to a first embodiment of the present invention. This display device 2
Reference numeral 1 denotes a light shielding member 23 capable of adjusting the light transmittance, and a control unit 25 for controlling the transmittance of the light shielding member 23 (see FIG. 2).
14 and 15 are the same as those of the conventional display device shown in FIGS. 14 and 15, and corresponding parts are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, the display device 21 is installed in the periphery of the driver's seat of the vehicle with the translucent portion 5 facing the driver, and performs a predetermined warning display such as for preventing a collision. .

The light shielding member 23 is, as shown in FIG.
The transparent electrodes 41a and 43 such as ITO films are provided on the surfaces facing each other.
a, two sheet-shaped transparent substrates 41, 43 formed of a transparent resin or the like, and both transparent substrates 41, 43;
And a polymer-dispersed liquid crystal layer 45 interposed therebetween.

The polymer-dispersed liquid crystal layer 45 is composed of a composite film (composite) of a predetermined polymer and liquid crystal.
(Nematic curvilinear alig
Need phase) type or PN (polymer ne)
2) type liquid crystal is used.

In the polymer-dispersed liquid crystal layer 45, when no voltage is applied, the liquid crystal in the liquid crystal layer 45 is oriented in a random direction, causing a difference in the refractive index between the polymer and the liquid crystal. Since the transmittance is greatly reduced, an opaque state having a cloudy appearance is formed. When a voltage is applied, the liquid crystal is arranged in the direction of the electric field, the refractive indexes of the polymer and the liquid crystal match, and the incident light is transmitted without being scattered, so that the liquid crystal is in a transparent state.

The light-shielding member 23 thus configured is a sheet-like member having appropriate flexibility, and is disposed so as to close the light-transmitting portion 5 as shown in FIG. In addition, when the light shielding member 23 is in the opaque state, light passing through the light transmitting portion 5 is effectively blocked. Here, the light-blocking member 23 is located at a position deeper than the image forming position where the image I is formed as viewed from the driver (visual object) so as not to obstruct the image I displayed in a floating state, that is, It is arranged at a position closer to the object O than the image forming position on the optical path of the lights 7 and 9.

As described above, the light transmitting portion 5 is formed by the light shielding member 23.
When light passing through is blocked, as shown in FIG.
The light 47 that enters the internal space 11 from the outside via the light transmitting portion 5 is blocked, and the lights 7, 9 from the object O for forming the floating display image I are also blocked. The displayed state of the image I is switched from the appearing state shown in FIG. 1 to the disappearing state shown in FIG.

Both transparent electrodes 41a, 43a of the light shielding member 23
Is connected to the control unit 25 through a predetermined connection line, and a signal necessary for controlling the light shielding member 23 is input to the control unit 25.

The control unit 25 controls the voltage applied between the transparent electrodes 41a and 43a of the light shielding member 23 based on a signal input from the outside, and adjusts the light transmittance of the light shielding member 23 to transmit light. By transmitting or blocking the light passing through the section 5, the image I of the target object O displayed and raised is made to appear or disappear.

FIGS. 4 and 5 show specific examples of display on the display device 21. In the case of FIG. 4, a plate of a predetermined warning color such as red is used as the object O, for example.
(See FIG. 14) is installed in the internal space 11 in a state orthogonal to the vehicle, and detects that the inter-vehicle distance between the vehicle and the preceding vehicle has become a predetermined distance or less, such as a radar (not shown) mounted on the vehicle. When the light is detected by the detecting means, a predetermined signal is given from the detecting means to the control unit 25, and accordingly, the light shielding member 23 is changed from the opaque state to the transparent state by the control unit 25. The floating display image I of the predetermined warning color appears on the front side of the light transmitting unit 5 so that the entire inside surface of the light transmitting unit 5 becomes the warning color.

In the case of FIG. 5, the object O is formed in a shape representing a predetermined distance (here, "10 m").
As in the case of FIG. 4, when the inter-vehicle distance is detected to be the predetermined inter-vehicle distance by a detecting means such as a radar, the control unit 25 changes the light shielding member 23 from an opaque state to a transparent state, and The floating display image I of the object O representing the inter-vehicle distance appears on the front side of the light transmitting section 5.

Then, by making the driver visually recognize the floating display image I shown in FIG. 4 or FIG. 5, a rear-end collision accident can be prevented. In the example shown in FIGS. 4 and 5, the light transmitting portion 5 is formed in a rectangular shape, but may be formed in a circular shape as shown in FIG.

As described above, according to the present embodiment, the control unit 25 adjusts the light transmittance of the light shielding member 23 disposed so as to close the light transmitting unit 5,
Since the image I of the object O displayed in a floating state appears or disappears, a mechanical structure such as a movable shutter is not required, and the structure of the display device 21 is simplified. Can be.

Further, by using a polymer dispersed liquid crystal layer as the liquid crystal layer 45 of the light shielding member 23, the light shielding member 23 can be formed without using a polarizing plate. 9 in a transparent state,
The light 7, 9 from the object O can be transmitted through the light shielding member 23 toward the image forming position without loss, and the image I of the object O can be displayed in a floating manner with sufficient brightness. .

Further, a display image I used for warning is provided.
Are displayed in a floating manner so as to float out of the internal space 11 of the display device 21, so that an effective warning display can be performed, and the visibility of the warning display can be improved.

According to the present embodiment, the light-shielding member 23 is disposed so as to close the light-transmitting portion 5, but the light-shielding member 23 is provided in a floating position from the object O to the image forming position. Any position on the optical path of the light 7, 9 may be used as long as the light 7, 9 for display can be effectively blocked and the image I of the object O can be eliminated. As shown in FIG. 6, the light shielding member 23 may be provided so as to divide the internal space 11 into the first concave mirror 1 side where the object O is installed and the second concave mirror 3 side.

FIG. 7 is a sectional view showing the structure of a display device according to a second embodiment of the present invention, and FIG. 8 is a plan view of the display device with the second concave mirror removed. The display device 51 includes a plurality of objects, here, two objects O1 and O2, and a plurality of light-shielding members 23 capable of adjusting the light transmittance independently of each other. The configuration is the same as that of the above-described display device 21 except that two light-shielding regions 23a and 23b are provided. Corresponding portions are denoted by the same reference numerals, and description thereof will be omitted.

The light-shielding member 23 moves the internal space 11 to the object O
The first and second concave mirrors 1 and 2 are disposed so as to be divided into a first concave mirror 1 side and a second concave mirror 3 side. As shown in FIG. 8, the light shielding member 23 is equally divided in the radial direction. Thus, two light shielding areas 23a and 23b are provided. Each of the light shielding regions 23a and 23b can be switched to a transparent state or an opaque state independently of each other.

As shown in FIGS. 7 and 8, each of the objects O1 and O2 has a corresponding light shielding area 23 of the light shielding member 23.
a, 23b, respectively, and the surface shapes of the mirror surfaces 1a, 3a are also changed so that light 53, 55 for floating display from each of the objects O1, O2 toward the image forming position is formed. Are set so as to pass through the corresponding light-shielding regions 23a and 23b of the light-shielding member 23 and go to the respective image forming positions.

For this reason, the control unit 25 (see FIG. 2) controls the light transmittance of each of the light-shielding regions 23a and 23b of the light-shielding member 23 so that the floating display images I1 and I2 of the objects O1 and O2. Appear independently of each other,
It can be annihilated.

Further, as shown in FIG. 7, the objects O1 and O2 are installed so that the installation heights H1 and H2 from the mirror surface 1a are different from each other. I1 and I2 are also formed at positions shifted by a predetermined value D along the optical axis A (see FIG. 14). Here, since the installation height H1 of the object O1 is higher than the object O2, the image I1 of the object O1 is closer to the driver than the image I2 of the object O2 when viewed from the driver. It is designed to look up.

FIGS. 9A and 9B are diagrams showing specific examples of display on the display device 51.
2 are different from each other (here, “10 m”).
4 and “50 m”). As in the case of FIG. 4 described above, when the detection unit such as a radar detects that the inter-vehicle distance has become 50 m, the control unit 25 controls the light shielding member. 23 light-shielding region 23 on the front side of object O2
The b is changed from the opaque state to the transparent state, and a floating display image I2 of the object O2 indicating 50 m appears at a predetermined image forming position as shown in FIG. 9A.

When the inter-vehicle distance further decreases and the inter-vehicle distance becomes 10 m, the control unit 25 replaces the light-shielding area 23b with the light-shielding area 23a on the front side of the object O1.
Is changed from the opaque state to the transparent state, and the floating display image I1 of the object O1 indicating 10 m is located closer to the driver than the image forming position of the floating display image I2 as seen from the driver, as shown in FIG. 9B. It appears at the image forming position on the near side.
Here, the object O1 representing 10 m is formed in a larger size than the object O2 representing 50 m, so that the floating display image I1 is displayed with a larger display size than the floating display image I2. It has become.

As described above, also in the present embodiment, similar to the first embodiment, the effect that the floating display images I1 and I2 can appear and disappear without the need for a mechanical structure is obtained. Since the light-shielding member 23 using the molecule-dispersed liquid crystal layer 45 is used, the light 53 and 55 from the objects O1 and O2 can be transmitted through the light-shielding member 23 without loss, and the floating is achieved. Display image I1,
The effect that an effective warning display can be performed by I2 is obtained.

Further, each light shielding area 23a,
Each object O is adjusted by adjusting the light transmittance of 23b.
Since the floating display images I1 and I2 of 1 and O2 can be made to appear or disappear independently, floating display with various changes can be performed.

Further, two floating display images I1, I2 representing different inter-vehicle distances (here, 10m and 50m).
2 is the image forming position and size corresponding to the value of the inter-vehicle distance indicated, that is, the floating display image I1 indicating the smaller distance is larger in the front than the floating display image I2 when viewed from the driver. , The distance between vehicles can be more effectively and easily recognized by the driver.

FIG. 10 is a sectional view showing the structure of the display device according to the third embodiment of the present invention. This display device 61
Is a point that two transparent displays 63 and 65 are set as objects in the internal space 11 at predetermined intervals in the front and rear, and illumination light 67 of a predetermined color is directed toward the transparent displays 63 and 65.
The configuration is the same as that of the above-described display device 21 except that a light source 69 for irradiating light is provided in the internal space 11, and corresponding portions are denoted by the same reference numerals and description thereof is omitted.

In this display device 61, each transparent display 6
As shown in FIGS. 10 and 11, the display contents 3, 65 are displayed in a floating manner at the corresponding image forming positions 71, 73, respectively.

Each of the transparent display devices 63 and 65 is a sheet-like member having the same configuration as the light-shielding member 23 in which a polymer-dispersed liquid crystal layer is sandwiched between transparent substrates provided with transparent electrodes. A plurality of segment portions for performing various displays such as a warning display are formed in 63a and 65a.
Then, a display image is formed by changing each segment portion from a transparent state to an opaque state showing a cloudy appearance, and partially forming an opaque region corresponding to an image to be displayed in the transparent region. .

Each of the transparent indicators 63,
Numeral 65 is disposed at a portion on the first concave mirror 1 side in the internal space 11 so as to intersect substantially perpendicularly with the optical axis A (see FIG. 14), and each transparent display on which a predetermined display image is formed is provided. Vessel 6
When the illumination light 67 is emitted from the light source 69 toward the display areas 63a, 65a of 3, 65, the opaque segments of the transparent displays 63, 65 are illuminated by the illumination light 67, As a result, the display image formed by each of the illuminated segments is floated and displayed at the predetermined image forming positions 71 and 73.

At this time, since the transparent displays 63 and 65 are disposed at predetermined intervals in the front and rear directions in the direction of the optical axis A, a floating display image of the transparent display 63 disposed on the front side. Is displayed in such a way that it floats toward the driver when viewed from the driver, rather than the floating display image of the transparent display 65 provided on the back side.

Here, the light source 69 is located at a position where the illuminating light 67 can be radiated to the transparent displays 63 and 65 from the direction in which the driver visually recognizes, and forms a floating display image with respect to the driver's visual direction. It is preferable to provide it at a position where it does not hinder the operation.
Since the transparent displays 63 and 65 are transparent, when the light source 69 illuminates the transparent display 65 on the back side, the transparent display 63 on the front side does not become an obstacle and the transparent display 63 is not hindered. , 65 do not hinder the light 75a, 75b, 77a, 77b for floating display from each of the transparent displays 63, 65.

The control of the display contents of each of the transparent displays 63 and 65 and the control of the light source 69 are performed by the control unit 25 described above.
(See FIG. 2).

FIGS. 12 (a) to 12 (c) are diagrams showing specific examples of display contents for preventing collision displayed by the display device 61. As the inter-vehicle distance from the preceding vehicle becomes smaller, FIG. The display contents are switched in three stages in the order of a), (b), and (c). FIG. 12 (a)
The display content 81, which is a floating display image shown in FIG.
The display contents 83 and 85, which are the floating display images shown in (b) and (c), are displayed by the transparent display 63 on the front side, and the display contents 83 and 85 are the display contents 81. Is also displayed floating at the image forming position on the near side. The display content 85 in FIG. 12C is displayed such that the entire inner surface of the light transmitting portion 5 has a predetermined warning color.

As in the case of FIG. 4 described above, the inter-vehicle distance is displayed on the display contents 81, 83,
When it is detected that the distance to display 85 has been reached, the light shielding member 23 is changed from the opaque state to the transparent state by the control of the control unit 25, and the display contents 81, 83, 85 of the transparent indicators 63, 65 are displayed. Are sequentially formed, whereby the display contents 81, which are floating display images, are formed.
83 and 85 appear in sequence so as to rise to the image forming positions 71 and 73.

As another specific example of the display contents, FIG.
9A and 9B may be displayed on the transparent displays 65 and 63, respectively.

As described above, in the present embodiment, as in the first embodiment, the display images of the transparent display devices 63 and 65 appear and disappear without any mechanical structure. And the light from the transparent displays 63 and 65 through the light shielding member 23 because the light shielding member 23 using the polymer dispersed liquid crystal layer 45 is used.
The effect that 5a, 75b, 77a, 77b can be transmitted without loss, and the effect that an effective warning display can be performed by the display images of the transparent displays 63, 65 displayed in a floating manner. can get.

Further, since the display contents of the transparent displays 63 and 65 are displayed in a floating manner, the transparent display 6 is displayed.
By changing the display contents of 3, 65, the display contents of the floating display image can be easily changed, and a floating display with various changes can be performed.

Further, two transparent displays 63 and 65 are provided at predetermined intervals in the front and rear direction along the optical axis A, and the display contents of each of the transparent displays 63 and 65 are located at positions separated from each other. Since the display can be displayed in a floating manner, FIG.
As shown in (b) and FIGS. 12 (a) to 12 (c), as the inter-vehicle distance becomes smaller, a more effective display such as a warning display for preventing collision is made by floating up to the driver's side as viewed from the driver. Warning display can be performed.

In this embodiment, the transparent display 63,
Although the display contents are changed using 65, FIG.
As shown in FIG. 3, another display means such as a liquid crystal display panel 91 may be provided to change the display content.

In each of the above embodiments, the light-shielding member 23 using liquid crystal is used as the light-shielding member. However, an amorphous material capable of controlling the transmittance of incident light by controlling the applied voltage and the supplied current is used. The light-blocking member may be formed using an electrochromic material such as tungsten oxide.

[0055]

As described above, according to the first to seventh aspects of the present invention, the light for floating display from the surface of the object to the light transmitting portion or the image forming position in the vicinity thereof is shielded. By adjusting the light transmittance of the provided light shielding member by the control unit, an image of the object displayed and displayed in a floating manner appears or disappears. No mechanical configuration is required, and the configuration of the display device can be simplified.

According to the third aspect of the present invention, by using the polymer-dispersed liquid crystal layer for the liquid crystal layer of the light shielding member, the light shielding member can be formed without using a polarizing plate. In a transparent state that allows light to pass through, light from the object can be transmitted through the light blocking member to the image forming position without loss, and the image of the object can be displayed with sufficient brightness in a floating manner. Can be.

According to the fourth aspect of the present invention, the light transmittance of each light-shielding region of the light-shielding member is adjusted by the control unit, so that light for floating display from each object corresponding to each light-shielding region is adjusted. By transmitting or cutting off, the image of each object to be displayed in a floating manner can be made to appear or disappear independently, and a floating display with various changes can be performed.

According to the fifth aspect of the present invention, since the display contents of the transparent display are displayed in a floating manner, the display contents of the floating display image can be easily changed by changing the display contents of the transparent display. Can be changed, and a floating display with various changes can be performed.

According to the sixth aspect of the present invention, a plurality of transparent mirrors are provided at an interval in the front and rear direction along the optical axis of the biconcave mirror, so that the display contents of each transparent display are floated at positions separated in the front and rear directions. And thereby a more effective floating display can be performed. In addition, since the transparent display has transparency, the transparent display does not become an obstacle to light for floating display from each transparent display, and a plurality of transparent displays can be arranged in a stacked state. it can.

According to the seventh aspect of the present invention, the display image used for the warning is displayed so as to rise from the internal space of the display device, so that an effective warning display can be performed. The visibility of the warning display can be improved.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a configuration of a light shielding member provided in the display device of FIG.

FIG. 3 is a diagram showing a state in which a light shielding member is in an opaque state in the display device of FIG. 1;

FIG. 4 is a diagram showing a specific display example of the display device of FIG. 1;

FIG. 5 is a diagram showing a specific display example of the display device of FIG. 1;

FIG. 6 is a sectional view of a modification of the display device of FIG.

FIG. 7 is a cross-sectional view illustrating a configuration of a display device according to a second embodiment of the present invention.

FIG. 8 is a plan view of the display device of FIG. 7 with a second concave mirror removed.

FIGS. 9A and 9B are diagrams showing specific display examples of the display device of FIG. 7;

FIG. 10 is a cross-sectional view illustrating a configuration of a display device according to a third embodiment of the present invention.

11 is a diagram showing a display state of the display device of FIG. 10 different from that of FIG. 10;

FIGS. 12A to 13C are diagrams showing specific display examples of the display device of FIG. 10;

FIG. 13 is a sectional view of a modification of the display device of FIG.

FIG. 14 is a cross-sectional view illustrating a configuration of a conventional display device.

FIG. 15 is a plan view of the display device of FIG.

[Explanation of symbols]

 1, 3 concave mirror 5 light-transmitting portion 11 internal space 21, 51, 61 display device 23 light-shielding member 23a, 23b light-shielding region 25 controller 41, 43 transparent substrate 41a, 43a transparent electrode 45 polymer-dispersed liquid crystal layer 63, 65 transparent Display 69 Light source O, O1, O2 Object I, I1, I2 Image

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI G09F 9/00 313 G09F 9/00 313 322 322Z 336 336B 361 361 19/12 19/12 Z 1-7-10 Kikusumi, Minami-ku, Nagoya-shi, Japan Inside Harness Research Institute

Claims (7)

[Claims] 1. A light transmitting part for transmitting light is provided at the center of a concave mirror on the front side of a pair of concave mirrors arranged with their mirror surfaces facing each other, and said pair of concave mirrors is provided. The light from an object installed at a predetermined position in the space surrounded by the object is reflected between the pair of concave mirrors and condensed on the light transmitting portion or an image forming position in the vicinity thereof, so that the object A display device that floats and displays the image of the light from the space through the light-transmitting portion, wherein the light is blocked on an optical path of the light from the surface of the object to the image forming position. A light-shielding member arranged to adjust the transmittance of incident light; and controlling the transmittance of the light-shielding member to transmit and block the light transmitted through the light-shielding member, thereby displaying a floating display. Appearing and disappearing the image of the object And a control unit which,
A display device comprising: 2. The light-shielding member has a predetermined liquid crystal layer sandwiched between two transparent substrates having transparent electrodes formed on opposing surfaces, and is applied to the liquid crystal layer by the two transparent electrodes. The transmittance of the incident light changes with a change in applied voltage, and the control unit controls an applied voltage between the two transparent electrodes of the light-shielding member, thereby controlling the light-shielding member. The display device according to claim 1, wherein the transmittance is controlled. 3. The liquid crystal layer according to claim 2, wherein the liquid crystal layer is a polymer-dispersed liquid crystal layer in which the scattering state of incident light changes according to a change in an applied voltage applied by the transparent electrodes. Display device. 4. A plurality of objects representing predetermined display contents are provided as the objects, and the light shielding member transmits and separates the light from the surface of each object individually for each object. The display device according to any one of claims 1 to 3, wherein a plurality of light shielding regions corresponding to the respective objects that can be blocked are provided. 5. The display device according to claim 1, further comprising: two transparent substrates having predetermined transparent electrodes formed on surfaces facing each other; and an applied voltage sandwiched between the transparent substrates and applied by the transparent electrodes. And a polymer-dispersed liquid crystal layer in which the scattering state of incident light changes with the change in the size of the incident light, and the object is installed as the object at the predetermined position in the space so that the display content is displayed in a floating manner. A transparent display, and a light source that emits predetermined illumination light toward the transparent display, the control unit controls an applied voltage applied between the two transparent electrodes of the transparent display. 4. The apparatus according to claim 1, further comprising a function of displaying a predetermined display image on the transparent display by controlling a scattering area in which the illumination light is scattered in the transparent display. Crab described Display device. 6. The display device according to claim 5, wherein a plurality of the transparent display devices are arranged at an interval in front and rear along the optical axis of the biconcave mirror. 7. The display device according to claim 1, wherein the display device is mounted on a vehicle and performs a predetermined warning display to a driver.
7. The display device according to any one of claims 1 to 6.