JP2023086194A - Display device - Google Patents

Abstract

To provide a display device capable of displaying an aerial image and a mirror image in which discomfort is suppressed.SOLUTION: A display device 1 includes: a display part 2 for displaying an image 22; a retroreflective member 3 which is arranged opposite to the display part 2, reflects light in a direction parallel to an incident direction, and has a plurality of first through holes 32; a retardation member 4 which is arranged opposite to the retroreflective member 3, has a plurality of second through holes 42 provided so as to overlap to a position of the first through hole 32, and changes a polarization direction of the incident light; and a reflection type polarization member 5 which is arranged opposite to the retardation member 4, reflects light from the display part 2 output through the first through holes 32 and the second through holes 42 in a direction of the retardation member 4 and transmits light polarized by reflected by the retroreflective member 3 through the retardation member 4, and displays a mirror image 52 formed by having a mirror surface 510 together with an aerial image 26 imaged by the transmitting light.SELECTED DRAWING: Figure 1

Description

The present invention relates to display devices.

As a conventional technique, an image processing apparatus is known that includes an imaging unit that captures an image of a user, a display unit that displays the captured image, and an input unit that receives input from the user (see, for example, Patent Document 1). .).

This image processing device is a smart mirror configured as a self-supporting mirror that can be carried by the user. When the user faces the image processing device, his/her own image is displayed on the display section, and the image processing device functions as if it were a mirror. As an example, the image processing device has a display part configured as a touch panel, and the input part and the display part are configured integrally.

JP 2021-151332 A

In a conventional image processing apparatus, an image captured by an imaging unit is displayed on a display unit. Therefore, when a user looks at the display unit like a normal mirror, the user's own image is captured by the imaging unit instead of from the front. There is a problem in that an image that is not the full front view is displayed and the user feels uncomfortable.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a display device capable of displaying an aerial image and a mirror image while suppressing discomfort.

One aspect of the present invention is a display portion that displays an image, and a retroreflective member that is arranged to face the display portion, reflects light in a direction parallel to the incident direction, and has a plurality of first through holes. and a retardation member that is arranged opposite to the retroreflective member and has a plurality of second through holes provided so as to overlap with the first through holes, and that changes the polarization direction of incident light. , arranged to face the phase difference member, and reflects the light from the display output through the first through hole and the second through hole toward the phase difference member and retroreflects the light through the phase difference member. a reflective polarizing member that transmits polarized light reflected by the reflective member and displays an aerial image formed by the transmitted light and a mirror image formed by having a mirror surface; offer.

According to the present invention, it is possible to display an aerial image and a mirror image in which discomfort is suppressed.

FIG. 1(a) is a diagram showing an example of a display device, and FIG. 1(b) is an example of a block diagram of the display device. FIG. 2(a) shows an example of a cross-sectional view of the display device, and FIG. 2(b) shows an example of an image displayed by the display unit. FIGS. 3(a) to 3(d) are diagrams showing examples of through holes of the display device. FIG. 4 is a flow chart showing an example of the operation of the display device. FIG. 5 is a cross-sectional view showing an example of a display device provided with an absorbing member. FIG. 6(a) is a cross-sectional view showing an example of a display device having an absorption member on the back side of the detection electrode, and FIG. 6(b) is a diagram for explaining an example of the arrangement of the detection electrode and the absorption member. is.

(Summary of embodiment)
A display device according to an embodiment includes a display unit that displays an image, and a retroreflecting device that is arranged to face the display unit, reflects light in a direction parallel to the incident direction, and has a plurality of first through holes. A phase difference that has a reflecting member and a plurality of second through holes that are arranged opposite to the retroreflecting member and are provided so as to overlap the positions of the first through holes, and that changes the polarization direction of incident light. and a member arranged to face the phase difference member, reflecting light from the display output through the first through hole and the second through hole in the direction of the phase difference member and passing through the phase difference member. and a reflective polarizing member that transmits polarized light reflected by the retroreflective member and displays an aerial image formed by the transmitted light and a mirror image formed by having a mirror surface. It is configured.

This display device does not display an image picked up by a camera on the display unit, but displays a mirror image due to the reflection of the mirror surface and an aerial image in the same way as a mirror, thereby suppressing the feeling of discomfort given to the user. It can be performed.

[First embodiment]
(Overview of display device 1)
FIG. 1(a) is a diagram showing an example of the display device according to the first embodiment, and FIG. 1(b) is an example of a block diagram of the display device. FIG. 2(a) shows an example of a cross-sectional view of the display device according to the first embodiment, and FIG. 2(b) shows an example of an image displayed by the display unit. FIG. 2(a) is an example of a cross-sectional view of a cross-section cut along line AA in FIG. 1(a) viewed in the direction of the arrow.

Note that the ratios and shapes between figures in the drawings according to the embodiments described below may differ from the actual ratios and shapes. In FIG. 1(b), arrows indicate the flow of main signals and information. Furthermore, "A to B" indicating a numerical range shall be used to mean from A to B inclusive.

The display device 1 according to the present embodiment displays the mirror image 52 and the aerial image 26 at the same time, and can detect an operation performed on the aerial image 26 .

Specifically, as shown in FIGS. 1(a) and 2(b), the display device 1 has a display unit 2 that displays an image 22, and is arranged so as to face the display unit 2. A retroreflective member 3 that reflects light in a parallel direction and has a plurality of first through holes 32 , and a retroreflective member 3 that is arranged to face the retroreflective member 3 so as to overlap the first through holes 32 . A phase difference member 4 that has a plurality of second through holes 42 provided and changes the polarization direction of incident light, and a phase difference member 4 that is arranged to face the first through hole 32 and the second through hole 42 . The light from the display unit 2 output through the through hole 42 is reflected in the direction of the phase difference member 4, and the polarized light reflected by the retroreflective member 3 through the phase difference member 4 is transmitted. and a reflective polarizing member 5 that displays a mirror image 52 formed by having a mirror surface 510 together with an aerial image 26 formed by the emitted light.

Specifically, as shown in FIG. 2A, the display unit 2 directs the first linearly polarized light 23 toward the reflective polarizing member 5 through the first through hole 32 and the second through hole 42. output. The reflective polarization member 5 reflects the first linearly polarized light 23 toward the retardation member 4 . The phase difference member 4 gives a phase difference of π/2 to the incident first linearly polarized light 23 to change the polarization direction of the polarized light 24, and furthermore, the polarized light 24 reflected by the retroreflective member 3 has a phase of π/2. A phase difference is applied to change the polarization direction, and the second linearly polarized light 25 orthogonal to the first linearly polarized light 23 is emitted from the surface 40 toward the reflective polarizing member 5 . The reflective polarizing member 5 transmits the second linearly polarized light 25 .

As shown in FIG. 1B, the display device 1 controls an operation detection unit 6 that detects an operation on an aerial image 26, and an image 22 that is displayed on the display unit 2 in response to detection of an operation by the operation detection unit 6. It has a control unit 12 for controlling. Further, the display device 1 includes a communication unit 13 that enables communication with the electronic device 8 that is electromagnetically connected, and a storage unit 14 that has image information 140 of the image 22 to be displayed on the display unit 2. . Electromagnetic connection means connection using at least one of connection using a conductor, connection using light, which is a type of electromagnetic wave, and connection using a radio wave, which is a type of electromagnetic wave.

The storage unit 14 is, for example, a semiconductor memory, but is not limited to this. For example, the image information 140 stored in the storage unit 14 may be stored at the time of shipment or may be acquired from the electronic device 8 via the communication unit 13 . This electronic device 8 is, for example, a computer, a mobile terminal, or the like.

The display device 1 has a frame 10 that holds the display unit 2 and the like, as shown in FIG. 1(a). As a modification, the display device 1 may be configured such that, for example, a camera is provided in the frame 10 to confirm the position of the user 9 and display the image 22 .

In this embodiment, an aerial image 26 and a mirror image 52 are displayed in a display area 100 surrounded by a frame 10, as shown in FIG. 1(a). An aerial image area 26a shown in FIG. 1A is an area in which the aerial image 26 is displayed. A mirror image area 52a shown in FIG. 1A is an area in which the mirror image 52 is displayed.

As an example, the mirror image 52 is displayed over the entire display area 100, but is not limited to this. Further, the aerial image 26 may be displayed on the entire display area 100, or may be displayed on a part of the display area 100, for example. In this embodiment, as an example, it is possible to display in the entire display area 100 .

(Configuration of display unit 2)
The display unit 2 is configured using, for example, a liquid crystal display, an organic EL (Electro-Luminescence) display, or the like. The display unit 2 has a rear surface 21 attached to the frame 10 and a front surface 20 facing the rear surface 31 of the retroreflective member 3 . The display unit 2 may be arranged so that the front surface 20 and the rear surface 31 of the retroreflective member 3 are in close contact with each other, or may be arranged with a space between the front surface 20 and the rear surface 31 within a permissible range. good.

The display unit 2 displays an image 22 based on the display control signal _S1 output from the control unit 12, as shown in FIG. 1(b). The control section 12 generates the display control signal S ₁ based on the image information 140 stored in the storage section 14 . The first linearly polarized light 23 is light output from the display section 2 to display the image 22 .

The image 22 includes, for example, a first image 220 to a fourth image 223, as shown in FIG. 2(b). The first to fourth images 220 to 223 are formed as first to fourth aerial images 260 to 263 as shown in FIG. 1(a). Note that the image 22 may include an image other than the first image 220 to the fourth image 223 or a background image.

As an example, functions are assigned to the first image 220 to the third image 222, and the functions are executed by touch operations or the like performed on the first to third aerial images 260 to 262, respectively. As an example, the function is to display a new image and superimpose it on the mirror image 52 of the user 9, or to change the color, pattern, shape, etc. of an already displayed image.

A fourth image 223 is, by way of example, an image of a hat superimposed on the mirror image 52 . As an example, the fourth image 223 may be switched to an image of clothes, shoes, accessories, makeup, etc. by a touch operation or the like on the first to third aerial images 260 to 262 .

Further, the first aerial image 260 to the fourth aerial image 263 are adapted to accept, for example, gesture operations, tap operations, double-tap operations, drag operations, flick operations, pinch operations, etc., in addition to touch operations. Also good. For example, the user 9 can adjust the display position of the fourth aerial image 263 by performing a drag operation on the fourth aerial image 263 .

(Structure of retroreflective member 3)
The retroreflective member 3 is a prism-type or microbead-type retroreflective element. The retroreflective member 3 of the present embodiment is, for example, a microbead type retroreflective element. The retroreflection member 3 has a plurality of minute ball lenses with a refractive index of about 2 arranged side by side in the vertical and horizontal directions of the surface 30 serving as the incident surface.

As shown in FIG. 2A, the retroreflective member 3 converts the light (first linearly polarized light 23) incident on the surface 30 through the retardation member 4 into the light (first linearly polarized light 23). is configured to reflect in a direction parallel to the incident direction. This reflected light (second linearly polarized light 25 ) passes through the reflective polarizing member 5 and forms an aerial image 26 .

(Structure of Phase Difference Member 4)
The phase difference member 4 is arranged on the retroreflective member 3 so that the back surface 41 is in close contact with the front surface 30 of the retroreflective member 3 . The retardation member 4 is formed using, for example, a birefringent crystal, a liquid crystal material, a polymer film, or the like.

As an example, the phase difference member 4 is integrated with the retroreflective member 3 and has a plurality of through holes 11 formed therein. The plurality of through holes 11 will be described later.

The phase difference member 4 gives a phase difference of λ/4 (π/2) between the two vertically polarized light components propagating inside, and changes the polarization direction from linearly polarized light to circularly polarized light and from circularly polarized light to linearly polarized light. is configured as

Specifically, light incident from the surface 40 (first linearly polarized light 23) becomes polarized light 24 with a phase difference of λ/4 before being reflected by the surface 30 of the retroreflective member 3. , the polarized light 24 is further given a phase difference of λ/4 before it is reflected by the surface 30 of the retroreflective member 3 and emitted from the surface 40 . That is, the light (first linearly polarized light 23) incident from the surface 40 is emitted from the surface 40 as light (second linearly polarized light 25) having a phase difference of λ/2(π).

This second linearly polarized light 25 is generated when the first linearly polarized light 23 is polarized by the retardation member 4 from linearly polarized light to circularly polarized light, and from the circularly polarized light to linearly polarized light having a different angle from the linearly polarized light. , becomes linearly polarized light orthogonal to the first linearly polarized light 23 output from the display unit 2 , that is, having an angle of 90° (π) with respect to the first linearly polarized light 23 .

(Structure of Reflective Polarizing Member 5)
As shown in FIG. 2A, the reflective polarizing member 5 is arranged above the retardation member 4, that is, spaced apart from the retardation member 4. As shown in FIG. The reflective polarizing member 5 is a multilayer polarizing plate or a wire grid polarizing plate. As an example, the reflective polarizing member 5 of the present embodiment is a wire grid polarizing plate, and the rear surface 51 is a wire grid 55 of aluminum. The back surface 51 is the back surface of this wire grid 55 . As shown in FIG. 2A, the mirror image 52 is formed by reflected light 521 which is the light reflected by the mirror surface 510, which is the surface of the wire grid 55, of the incident light 520 from the outside.

Further, the reflective polarizing member 5 is configured to reflect the P wave that oscillates parallel to the wire grid 55 and transmit the S wave that is orthogonal to the wire grid 55 among the light incident on the rear surface 51 . This P wave is the first linearly polarized light 23 output from the display section 2 . The S wave is the second linearly polarized light 25 emitted from the phase difference member 4 .

An aerial image 26 is formed by the second linearly polarized light 25 transmitted through the reflective polarizing member 5 . The first linearly polarized light 23 that is the source of the second linearly polarized light 25 is output through the through hole 11 . Formation of the aerial image 26 and the mirror image 52 is therefore dependent on the through hole 11 .

(Regarding through hole 11)
3A to 3D are diagrams showing examples of through holes of the display device according to the first embodiment. 3(a) to 3(c) show part of the through holes 11 formed in the retroreflective member 3 and the phase difference member 4. FIG. Also, FIG. 3D shows an example of the configuration of one through hole 11 . Furthermore, in FIGS. 3(a) to 3(d), the inside of the through hole 11 is shaded.

The through hole 11 is a through hole formed by overlapping the first through hole 32 of the retroreflective member 3 and the second through hole 42 of the phase difference member 4, as shown in FIG. be. The through hole 11 penetrates from the surface 40 of the phase difference member 4 to the back surface 31 of the retroreflective member 3, and the surface 20 of the display section 2 is exposed. Therefore, the first linearly polarized light 23 output from the front surface 20 of the display section 2 reaches the back surface 51 of the reflective polarization member 5 through the through holes 11 . The through hole 11 is provided corresponding to the aerial image area 26a.

The first through-holes 32 of the retroreflective member 3 and the second through-holes 42 of the phase difference member 4 are formed at regular intervals, as shown in FIGS. 3(a) to 3(c), for example. be done. That is, the through holes 11 are formed at equal intervals.

The through-holes 11 shown in FIG. 3A have a circular shape, and the intervals between the adjacent through-holes 11 are equal. As an example, it is assumed that the through-hole 11 of the present embodiment has a circular shape.

The through hole 11 shown in FIG. 3B has a rectangular shape. The through-holes 11 are equally spaced in the vertical and horizontal directions of the paper surface of FIG. 3(b).

The through hole 11 shown in FIG. 3(c) has an elongated rectangular shape. The through-holes 11 are evenly spaced in the horizontal direction of the paper surface of FIG. 3(c).

A through-hole 11 shown in FIG. 3D is formed by an assembly of a plurality of circular through-holes 110 . In other words, a plurality of through-holes 110 are gathered within the dotted line at equal intervals to form the through-hole 11, rather than one through-hole 11 being provided so as to be surrounded by the dotted line in FIG. 3(d).

The ratio of the area of the through holes 11 to the area of the surface 30 of the retroreflective member 3 where the through holes 11 are not formed is, for example, preferably 30 to 70%, more preferably 50%. As for the through hole ratio, when the numerical value is large, the ratio of the area of the aerial image 26 is larger than the ratio of the mirror image 52 , and when it is small, the ratio of the area of the aerial image 26 is smaller than the ratio of the mirror image 52 . For example, when the through porosity is 30%, the area ratio of the aerial image 26 is 30%, the area ratio of the mirror image 52 is 70%, and the resolution of the aerial image 26 is lower than that of the mirror image 52 .

In this embodiment, as an example, the through porosity is 50%. That is, the area of the aerial image 26 and the area of the mirror image 52 are equal. Therefore, the user can perceive the aerial image 26 and the mirror image 52 at the same rate.

For example, when the through hole 11 is circular, the diameter is preferably about 10 μm to 3 mm, more preferably 100 μm. Through hole 11 of the present embodiment is 100 μm, for example.

(Configuration of Operation Detection Unit 6)
The operation detection unit 6 has a plurality of detection electrodes 60 arranged on the surface 50 of the reflective polarization member 5, as shown in FIG. 2(a). The detection electrode 60 is configured as a transparent electrode so as to transmit the second linearly polarized light 25, but is not limited to this. Also, the detection electrode 60 may be provided inside the reflective polarizing member 5 .

The operation detection unit 6 generates detection information S2 according to the capacitance formed between the operation finger 90 of the user 9 and the detection electrode 60 and outputs the detection information _S2 to the control unit 12 . The control unit 12 determines whether or not there is an operation based on the capacitance of each detection electrode 60 based on the acquired detection information _S2 and the threshold value 141 stored in the storage unit 14 .

The operation detection section 6 is configured to detect an operation finger 90 in a floating state away from the reflective polarization member 5 . That is, the control unit 12 sets the threshold value 141 so as to detect the operating finger 90 touching the aerial image 26 with increased detection sensitivity.

As a modified example, the operation detection unit 6 may be an infrared sensor, a sensor using a camera, or the like. For example, when the operation detection unit 6 detects an operation by processing an image captured by a camera, the camera is arranged within the frame 10 or the display area 100 .

(Configuration of control unit 12)
The control unit 12 is composed of, for example, a CPU (Central Processing Unit) that performs calculations and processing on acquired data according to a stored program, a semiconductor memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory). It is a microcomputer that This ROM stores, for example, a program for operating the control unit 12 . The RAM is used, for example, as a storage area for temporarily storing calculation results and the like. The control unit 12 also has means for generating a clock signal therein, and operates based on this clock signal.

The control unit 12 is configured to switch the aerial image 26 according to the operation when the operation detection unit 6 detects the operation. For example, when a touch operation or the like is performed on the first aerial image 260 , the control unit 12 executes a function assigned to the first aerial image 260 .

Further, as an example, when the control unit 12 is electromagnetically connected to the electronic device 8 via the communication unit 13, the control unit 12 is configured to output the operation information _S4 corresponding to the detected operation to the electronic device 8. . As an example, the electronic device 8 generates display image information S 3 based on the acquired operation information S ₄ and outputs the display image information S ₃ to the control unit 12 via the communication unit 13 . The control unit 12 generates the display control signal _S1 based on the display image information _S3 , controls the display unit 2, and forms an aerial image 26 according to the operation performed.

The operation of the display device 1 of this embodiment will be described below according to the flowchart of FIG.

(motion)
The control unit 12 of the display device 1 monitors whether an operation has been performed based on the capacitance of each detection electrode 60 obtained from the operation detection unit 6 and the threshold value 141 stored in the storage unit 14 .

When the control unit 12 determines that “Yes” in step 1 is established, that is, an operation has been performed (Step 1: Yes), the display unit 2 displays an image according to the operation detected based on the image information 140 in the storage unit 14 . The image 22 to be displayed is controlled (Step 2).

The control unit 12 controls the aerial image 26 via the image 22 and advances the process to step 1 .

(Effect of the first embodiment)
The display device 1 of the present embodiment can display the aerial image 26 and the mirror image 52 in which a sense of discomfort is suppressed. Specifically, the display device 1 can display the mirror image 52 parallel to the mirror surface 510 facing the user and the aerial image 26 parallel to the mirror surface 510. Therefore, the image captured by the camera is displayed on the display unit. Compared to the case of displaying, it is possible to perform display with less sense of discomfort given to the user.

The display device 1 can suppress the deterioration of the display function due to the operation. Specifically, since the display device 1 allows the user to operate the aerial image 26 without touching the display unit 2, the display unit 2 is less likely to become dirty than when the touch panel is directly operated. Therefore, it is possible to suppress the deterioration of the display function due to the operation.

Since the display device 1 can display the aerial image 26 and the mirror image 52 at the same time, it is possible to achieve both the mirror function and the information display function compared to the case where this configuration is not adopted.

Since the display device 1 can detect an operation on the aerial image 26, it is possible to switch the display of the aerial image 26 according to the operation and improve convenience for the user, compared to the case where this configuration is not adopted. .

[Second embodiment]
The second embodiment differs from the first embodiment in that an absorbing member that absorbs visible light is provided.

FIG. 5 is a cross-sectional view showing an example of the display device according to the second embodiment. In the embodiments described below, portions having the same functions and configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof will be omitted.

As shown in FIG. 5, the reflective polarizing member 5 of the present embodiment absorbs the light (the first linearly polarized light 23) of the display section 2 that has passed through the first through hole 32 and the second through hole 42. The back surface 51 has an absorbing member 7 that absorbs the water. The absorbing member 7 is, for example, a black film-like resin material that absorbs visible light or a thin film printed with black.

The dotted line shown in FIG. 5 indicates the light 27 of the first linearly polarized light 23 output from the display section 2 that is reflected by the reflective polarizing member 5 and enters the through hole 11 again. When the absorbing member 7 is not arranged, this light 27 enters the through hole 11 again and is reflected to form an aerial image.

That is, since the light 27 forms an aerial image at a position shifted from the first aerial image 260, the first aerial image 260 is shifted and overlapped, that is, a ghost of the first aerial image 260 is formed. .

However, in the display device 1 of the present embodiment, since the absorption member 7 for absorbing the light 27 incident on the through-hole 11 again is provided on the back surface 51 of the reflective polarizing member 5, formation of ghost images can be suppressed. can be done.

As an example, the detection electrodes 60 of the operation detection section 6 are provided on the surface 50 of the reflective polarization member 5 as shown in FIG.

The area of the absorbing member 7 is, for example, half the area of the through hole 11 . For example, when the through hole ratio is 50%, the area of the absorbing member 7 is half the area of the surface 40 of the retardation member 4 excluding the through holes 11 .

(Effect of Second Embodiment)
Since the display device 1 of the present embodiment includes the absorbing member 7 that absorbs the light that causes ghosts, it is possible to suppress ghosting compared to the case where there is no absorbing member.

[Third Embodiment]
The third embodiment differs from the other embodiments in that the detection electrodes are arranged between the absorbing member and the reflective polarizing member.

FIG. 6 is a cross-sectional view showing an example of the arrangement of detection electrodes and absorbing members of the display device according to the third embodiment. FIG. 6 is a partially enlarged view for explanation.

As shown in FIG. 6, the operation detection unit 6 of the present embodiment has a plurality of detection electrodes 60 on the rear surface 51 of the reflective polarizing member 5 in order to detect an operation on the aerial image 26 by a capacitance method. ing. The absorbing member 7 is provided on the rear surface 61 of the detection electrode 60 .

In other words, the detection electrode 60 is arranged between the reflective polarizing member 5 and the absorbing member 7 . Since the detection electrode 60 does not need to transmit light, it is formed not as a transparent electrode but as a conductive metal film such as copper or aluminum. Note that the detection electrode 60 is arranged via an insulator.

Here, the detection electrode 60 may include an electrode sandwiched between the reflective polarizing member 5 and the absorbing member 7 and an electrode not sandwiched between them. The electrode may not be arranged between the absorbing member 7 and may be arranged partially.

Moreover, when some of the detection electrodes 60 are sandwiched and the others are not sandwiched, as an example, all the detection electrodes are preferably formed as transparent electrodes.

(Effect of the third embodiment)
In the display device 1 of the present embodiment, since the detection electrode 60 is arranged between the reflective polarization member 5 and the absorption member 7, the formation of the aerial image 26 is not hindered as compared with the case where this configuration is not adopted. It becomes easier to arrange the detection electrode 60 at the position.

According to the display device 1 of at least one embodiment described above, it is possible to suppress the deterioration of the display function due to the operation.

Although some embodiments and modifications of the present invention have been described above, these embodiments and modifications are merely examples, and do not limit the invention according to the scope of claims. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, changes, etc. can be made without departing from the scope of the present invention. Moreover, not all the combinations of features described in these embodiments and modifications are essential to the means for solving the problems of the invention. Furthermore, these embodiments and modifications are included in the scope and gist of the invention, as well as the invention described in the claims and the scope of equivalents thereof.

DESCRIPTION OF SYMBOLS 1... Display apparatus, 2... Display part, 3... Retroreflection member, 4... Phase difference member, 5... Reflective polarization member, 6... Operation detection part, 7... Absorption member, 11... Through hole, 12... Control part , 13... Communication unit, 14... Storage unit, 22... Image, 23... First linearly polarized light, 24... Polarized light, 25... Second linearly polarized light, 26... Aerial image, 32... First through hole, 42... Second through hole 52 Mirror image 60 Detection electrode 110 Through hole

Claims (5)

a display unit for displaying an image;
a retroreflective member disposed facing the display unit, reflecting light in a direction parallel to the incident direction, and having a plurality of first through holes;
a retardation member that is arranged opposite to the retroreflective member and has a plurality of second through holes provided so as to overlap with the first through holes, and that changes the polarization direction of incident light; ,
arranged to face the phase difference member and reflecting light from the display section output through the first through hole and the second through hole toward the phase difference member; a reflective polarizing member that transmits polarized light reflected by the retroreflective member through the member, and displays an aerial image formed by the transmitted light and a mirror image formed by having a mirror surface;
display device. The display unit outputs a first linearly polarized light toward the reflective polarizing member through the first through hole and the second through hole,
The reflective polarizing member reflects the first linearly polarized light toward the retardation member,
The retardation member imparts a phase difference of π/2 to the incident first linearly polarized light to change the polarization direction of the polarized light, and the polarized light reflected by the retroreflective member has a phase difference of π/2. to change the polarization direction and emit from the surface toward the reflective polarizing member as a second linearly polarized light orthogonal to the first linearly polarized light,
The reflective polarizing member transmits the second linearly polarized light,
The display device according to claim 1. The first through-holes of the retroreflective member and the second through-holes of the phase difference member are formed at regular intervals,
The display device according to claim 1 or 2. The reflective polarizing member has, on its back surface, an absorbing member that absorbs the light from the display section that has passed through the first through hole and the second through hole.
4. The display device according to claim 1. an operation detection unit that detects an operation on the aerial image;
a control unit that controls the image displayed on the display unit in response to detection of an operation by the operation detection unit;
with
The display device according to any one of claims 1 to 4.

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