KR101649826B1 - Display device - Google Patents

Display device Download PDF

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Publication number
KR101649826B1
KR101649826B1 KR1020150078848A KR20150078848A KR101649826B1 KR 101649826 B1 KR101649826 B1 KR 101649826B1 KR 1020150078848 A KR1020150078848 A KR 1020150078848A KR 20150078848 A KR20150078848 A KR 20150078848A KR 101649826 B1 KR101649826 B1 KR 101649826B1
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South Korea
Prior art keywords
light
display panel
pixel region
disposed
display device
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KR1020150078848A
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Korean (ko)
Inventor
윤현식
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서울과학기술대학교 산학협력단
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Priority to KR1020150078848A priority Critical patent/KR101649826B1/en
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    • G02B27/2242—

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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

A display device is provided. The display device includes a display panel and a light refracting portion disposed on the display panel, the light refracting portion having a first surface facing the display panel and a second surface opposite to the first surface. Wherein the light refracting portion includes a light refraction pattern disposed on the first surface and having a first inclined surface, a second inclined surface, and a contact surface connecting the first inclined surface and the second inclined surface, It can refract light coming out.

Description

[0001]

The present invention relates to a display device.

2. Description of the Related Art Recently, there has been actively developed a display device that realizes stereoscopic images without glasses or implements different images according to viewing directions.

The display device uses a Parallax barrier method and a Lenticular lens method in order to realize a non-eye hardening 3D image. However, the parallax barrier method has a problem that the brightness is reduced due to the barrier, There is a problem that it is difficult to manufacture.

In order to solve the above problems, the present invention provides a display device capable of realizing a stereoscopic image or a multi-view image with excellent image quality.

Other objects of the present invention will become apparent from the following detailed description and the accompanying drawings.

A display device according to embodiments of the present invention includes a display panel and a light refracting portion disposed on the display panel and having a first surface facing the display panel and a second surface opposite to the first surface. Wherein the light refracting portion includes a light refraction pattern disposed on the first surface and having a first inclined surface, a second inclined surface, and a contact surface connecting the first inclined surface and the second inclined surface, It can refract light coming out.

Wherein the display panel includes a first pixel region corresponding to the first sloped surface and a second pixel region corresponding to the second sloped surface, the contact surface having a first pixel region corresponding to the first pixel region and a second pixel region corresponding to the second sloped surface, And the light refraction part can be bonded to the display panel through the contact surface.

The display device may further include a structure disposed at a boundary between the first pixel area and the second pixel area of the display panel, and the structure may include a surface parallel to the display panel and the contact surface .

The structure may include an adhesive structure disposed between the display panel and the contact surface to adhere the light refraction pattern to the display panel.

And a recessed region defined by the first inclined surface and the second inclined surface may be disposed on the first surface. The structure may include a light blocking structure disposed in the recess region and blocking light that interferes at a boundary between the first pixel region and the second pixel region.

The size of the cross section of the light refraction pattern in a direction parallel to the display panel can be reduced toward the display panel.

The photorefractive pattern may be in the form of a prism.

A recessed area defined by the first inclined surface and the second inclined surface is disposed on the first surface, and the display device may further include a light refraction adjusting material disposed in the recessed area.

The photorefractive modulator may include two or more different types of photorefractive modulators.

An upper transparent electrode provided between the first surface of the photorefractive unit and the photorefractive modulator and a lower transparent electrode provided on the display panel, wherein the lower transparent electrode is provided between the upper transparent electrode and the lower transparent electrode, The refractive index of the photorefractive modulator may be changed according to a control signal.

The display device according to embodiments of the present invention may be attached to the display panel of the light refraction part to maintain a structurally stable shape. The display device can be more effectively used for a display device having a large area such as a large area 3D TV. In addition, the display device can be applied to a non-eye-warming display device capable of viewing a stereoscopic image without wearing glasses.

1 is a cross-sectional view of a display device according to an embodiment of the present invention.
2 is a schematic exploded perspective view of the display device of FIG.
3 is a schematic exploded perspective view of a display device according to another embodiment of the present invention.
4 is a cross-sectional view of a display device according to another embodiment of the present invention.
5 is a cross-sectional view of a display device according to another embodiment of the present invention.
6 is a cross-sectional view of a display device according to another embodiment of the present invention.
7 is a cross-sectional view of a display device according to another embodiment of the present invention.
8 is a cross-sectional view of a display device according to another embodiment of the present invention.
9 is a cross-sectional view of a display device according to another embodiment of the present invention.
10 is a cross-sectional view of a display device according to another embodiment of the present invention.
11 is a cross-sectional view of a display device according to another embodiment of the present invention.
12 shows a cross-sectional view of a display device according to another embodiment of the present invention.
13 is a cross-sectional view of a display device according to another embodiment of the present invention.
14 is a cross-sectional view of a display device according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to examples. The objects, features and advantages of the present invention will be easily understood by the following embodiments. The present invention is not limited to the embodiments described herein, but may be embodied in other forms. The embodiments disclosed herein are provided so that the disclosure may be thorough and complete, and that those skilled in the art will be able to convey the spirit of the invention to those skilled in the art. Therefore, the present invention should not be limited by the following examples.

Although the terms first, second, etc. are used herein to describe various elements, the elements should not be limited by such terms. These terms are only used to distinguish the elements from each other. In addition, when an element is referred to as being on another element, it may be directly formed on the other element, or a third element may be interposed therebetween.

The sizes of the elements in the figures, or the relative sizes between the elements, may be exaggerated somewhat for a clearer understanding of the present invention. In addition, the shape of the elements shown in the drawings may be somewhat modified by variations in the manufacturing process or the like. Accordingly, the embodiments disclosed herein should not be construed as limited to the shapes shown in the drawings unless specifically stated, and should be understood to include some modifications.

FIG. 1 is a cross-sectional view of a display device according to an embodiment of the present invention, and FIG. 2 is a schematic exploded perspective view of a display device according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, the display device 10 may include a display panel 100 and a light refracting portion 200.

The display panel 100 may be a panel used in various display devices such as an LCD device, an LED device, an OLED device, a PDP device, a projection display device, and a holographic display device. The display panel 100 may include a plurality of pixel regions. For example, the display panel 100 may include a first pixel region 110 and a second pixel region 120. The first pixel region 110 and the second pixel region 120 may include one or more pixels.

The light refracting portion 200 may be disposed on the display panel 100 to refract light emitted from the display panel 100. The light refracting portion 200 may include a first surface 211 facing the display panel 100 and a second surface 212 disposed on the opposite side of the first surface 211. The light refraction portion 220 may include a plurality of light refraction patterns 220 disposed on the first surface 211. The photorefractive pattern 220 may include a first sloped surface 221 and a second sloped surface 222 corresponding to the first pixel region 110 and the second pixel region 120 of the display panel 100 . The first inclined surface 221 and the second inclined surface 222 correspond to the sides of the light refraction pattern 220, respectively. The cross section of the light refraction pattern 220 in a direction perpendicular to the display panel 100 may be a trapezoidal shape. The sectional area of the light refraction pattern 220 in a direction parallel to the display panel 100 may be reduced toward the display panel 100. [ The light refraction pattern 220 may include a contact surface 223 connecting the first inclined surface 221 and the second inclined surface 222 and the contact surface 223 may be disposed in parallel with the display panel 100 . The light refracting portion 200 can be adhered to the display panel 100 through the contact surface 223.

The light refracting portion 200 may be, for example, an optical film. The photoreflecting portion 200 may be formed of a material selected from the group consisting of PET (polyethylene terephthalate), PMMA (polymethyl methacrylate), poly (pentabromophenyl methacrylate), polythiomethacrylate, a polycarbonate, a polymer material having a polarizing property, a nanocomposite, or the like. The nanocomposite may be in the form of nanoparticles (e.g., titanium dioxide nanoparticles) dispersed in a polymer (e.g., polyimide).

The first light L1 emerging from the first pixel region 110 of the display panel 100 is incident on the first inclined surface 221 of the light refraction pattern 220 and refracted to form an image in a predetermined direction. The second light L2 emitted from the second pixel region 120 of the display panel 100 is incident on the second inclined surface 222 of the light refraction pattern 220 and refracted to form an image in a predetermined direction. As described above, the first light L1 and the second light L2 emitted from the display panel 100 are refracted in different directions in the light refracting unit 200 to form a stereoscopic image or a multi-view image. Also, the light refracting portion 200 can be adhered to the display panel 100 through the contact surface 223, so that the display device 10 can maintain a structurally stable shape. The display device 10 can be more effectively used for a display device having a large area such as a large-area 3D TV.

3 is a schematic exploded perspective view of a display device according to another embodiment of the present invention.

Referring to FIG. 3, the plurality of light refraction patterns 220 disposed on the first surface 211 of the light refracting portion 200 may have the shape of a polygonal column. The cross section of the light refraction pattern 220 in a direction perpendicular to the display panel 100 may have a trapezoidal shape. The cross section of the light refraction pattern 220 in the direction parallel to the display panel 100 can be reduced toward the display panel 100. [ The light refraction pattern 220 may include a first inclined surface, a second inclined surface, a third inclined surface, and a fourth inclined surface. The light refraction pattern 220 may include a contact surface 223 connecting the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface, and the light refracting portion 200 through the contact surface 223 And can be adhered to the display panel 100.

The shapes of the different light refraction patterns 220 described in FIGS. 2 and 3 can be applied to the embodiments described below, and thus are not separately described.

4 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 4, a light refraction control material 400 is further disposed in the recessed regions A and B defined by the first inclined plane 221 and the second inclined plane 222 of the light refraction pattern 220 .

The photorefractive modulator 400 may include, for example, ethanol, water, fluorocarbon, silicon oil, fluorine oil, liquid crystal, and the like. The first light L1 from the first pixel region 110 of the display panel 100 and the first light L1 from the second pixel region 120 by the optical refraction adjusting material 400 disposed in the recess regions A, The second light L2 emerging from the light source can be refracted.

The first light L1 emitted from the first pixel region 110 of the display panel 100 passes through the photorefractive material 400 and is incident on the first slanted surface 221 of the photorefractive pattern 220, Is refracted in the pattern 220 and passes through the second surface 212 and advances in a predetermined direction to form an image. The second light L2 emitted from the second pixel region 120 of the display panel 100 passes through the photorefractive material 400 and is incident on the second inclined surface 222 of the photorefractive pattern 220, Is refracted in the pattern 220 and passes through the second surface 212 and advances in a predetermined direction to form an image. As described above, the first light L1 and the second light L2 emitted from the display panel 100 are refracted in different directions in the light refracting unit 200 to form a stereoscopic image or a multi-view image. Also, the light refracting portion 200 can be adhered to the display panel 100 through the contact surface 223, so that the display device 10 can maintain a structurally stable shape. The display device 10 can be more effectively used for a display device having a large area such as a large-area 3D TV.

5 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 5, the display device 10 may include an upper transparent electrode 510 and a lower transparent electrode 520.

The upper transparent electrode 510 may be disposed between the first surface 211 of the photorefractive portion 200 and the light refraction control material 400 and the lower transparent electrode 520 may be disposed on the display panel 100. The refractive index of the photorefractive modulator may be changed or the angle at which the light is refracted may be changed according to a control signal provided by the upper transparent electrode 510 and the lower transparent electrode 520. The transparent electrodes 510 and 520 may be formed of ITO or the like.

6 is a cross-sectional view of a display device according to another embodiment of the present invention.

6, the display device 10 may include a first photorefractive modulator material 410 and a second photorefractive modulator material 420 having different indices of refraction in the recess regions A and B . The first light L1 from the first pixel region 110 of the display panel 100 and the first light L1 from the second pixel region 120 by the optical refraction adjusting material 400 disposed in the recess regions A, The second light L2 emerging from the light source can be refracted.

7 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 7, the display device 10 may include a display panel 100 and a light refracting portion 200.

The light refraction pattern 220 includes a first inclined plane 221 corresponding to the first pixel region 110 of the display panel 100, a second inclined plane 222 corresponding to the second pixel region 120, 223). The light refraction pattern 220 may further include a surface connecting the first inclined surface 221 and the contact surface 223 and a surface connecting the second inclined surface 222 and the contact surface 223. [ The cross-section of the protrusion formed by the contact surfaces 223 and the contact surfaces 223 at both ends of the contact surface 223 may be a square. The light refracting portion 200 can be adhered to the display panel 100 through the contact surface 223.

The first light L1 emitted from the first pixel region 110 of the display panel 100 is incident on the first inclined surface 221 of the light refraction pattern 220 and is refracted in the light refraction pattern 220, You can proceed to display the image. The second light L2 emitted from the second pixel region 120 of the display panel 100 is incident on the second inclined surface 222 of the light refraction pattern 220 and is refracted in the light refraction pattern 220, You can proceed to display the image. As described above, the first light L1 and the second light L2 emitted from the display panel 100 are refracted in different directions in the light refracting unit 200 to form a stereoscopic image or a multi-view image. Also, the light refracting portion 200 can be adhered to the display panel 100 through the contact surface 223, so that the display device 10 can maintain a structurally stable shape. The display device 10 can be more effectively used for a display device having a large area such as a large-area 3D TV.

8 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 8, the display device 10 may include a photorefractive modulator material 400 disposed in the recessed regions A, B.

The photorefractive modulator 400 may include, for example, ethanol, water, fluorocarbon, silicon oil, fluorine oil, liquid crystal, and the like. The first light L1 from the first pixel region 110 of the display panel 100 and the first light L1 from the second pixel region 120 by the optical refraction adjusting material 400 disposed in the recess regions A, The second light L2 emerging from the light source can be refracted.

9 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 9, the display device 10 may include a display panel 100, a light refracting portion 200, and an adhesive structure 310.

The adhesive structure 310 may be disposed between the display panel 100 and the contact surface 223 of the light refraction pattern 220. The light refraction portion 200 can be adhered to the display panel 100 through the adhesive structure 310. The adhesive structure 310 may be disposed at the boundary between the first pixel region 110 and the second pixel region 120 of the display panel 100. [ Although the cross-section of the adhesive structure 310 is shown in the form of a square in the figure, it is not limited thereto. The adhesive structure 310 may block the light interfering with the first pixel region 110 and the second pixel region 120 of the display panel 100. The adhesive structure 310 may be formed of a material that can be adhered, for example, a polymer, a metal, a ceramic, or the like.

The first light L1 emitted from the first pixel region 110 of the display panel 100 is incident on the first inclined surface 221 of the light refraction pattern 220 and refracted in the light refraction pattern 220, You can proceed to display the image. The second light L2 emitted from the second pixel region 120 of the display panel 100 is incident on the second inclined surface 222 of the light refraction pattern 220 and is refracted in the light refraction pattern 220, You can proceed to display the image. As described above, the first light L1 and the second light L2 emitted from the display panel 100 are refracted in different directions in the light refracting unit 200 to form a stereoscopic image or a multi-view image.

The light refraction portion 200 can be adhered to the display panel 100 through the adhesive structure 310 so that the display device 10 can maintain a structurally stable shape. The display device 10 can be more effectively used for a display device having a large area such as a large-area 3D TV. In addition, the adhesive structure 310 blocks the light interfering with the first pixel area 110 and the second pixel area 120 of the display panel 100, thereby realizing a stereoscopic image or a multi-view image of excellent image quality .

10 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 10, the display device 10 may further include a light refraction-adjusting material 400 disposed in the recess regions A and B. FIG.

The photorefractive modulator 400 may include, for example, ethanol, water, fluorocarbon, silicon oil, fluorine oil, liquid crystal, and the like. The first light L1 from the first pixel region 110 of the display panel 100 and the first light L1 from the second pixel region 120 by the optical refraction adjusting material 400 disposed in the recess regions A, The second light L2 emerging from the light source can be refracted.

11 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 11, the display device 10 may include a display panel 100, a light refracting portion 200, and a light shielding structure 320.

The light blocking structure 320 may be disposed at the boundary between the first pixel region 110 and the second pixel region 120 of the recess regions A and B and may be disposed at the boundary between the first pixel region 110 and the second pixel region 120 by the light blocking structure 320. [ The light interfering at the boundary between the region 110 and the second pixel region 120 can be blocked. In the figure, the cross section of the light shielding structure 320 is shown in a rectangular shape, but the present invention is not limited thereto. The light shielding structure 320 may be formed of a material capable of blocking light, for example, a polymer, a metal, a ceramic, or the like.

The first light L1 emitted from the first pixel region 110 of the display panel 100 is incident on the first inclined surface 221 of the light refraction pattern 220 and refracted in the light refraction pattern 220, You can proceed to display the image. The second light L2 emitted from the second pixel region 120 of the display panel 100 is incident on the second inclined surface 222 of the light refraction pattern 220 and is refracted in the light refraction pattern 220, You can proceed to display the image. As described above, the first light L1 and the second light L2 emitted from the display panel 100 are refracted in different directions in the light refracting unit 200 to form a stereoscopic image or a multi-view image.

The light refracting portion 200 can be adhered to the display panel 100 through the contact surface 223 so that the display device 10 can maintain a structurally stable shape. The display device 10 can be more effectively used for a display device having a large area such as a large-area 3D TV. In addition, the light shielding structure 320 interrupts the light interfering at the boundary between the first pixel region 110 and the second pixel region 120 of the display panel 100, Can be implemented.

12 shows a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 12, the display device 10 may further include a photo-refractive-index control material 400 disposed in the recess regions A and B. FIG.

The photorefractive modulator 400 may include, for example, ethanol, water, fluorocarbon, silicon oil, fluorine oil, liquid crystal, and the like. The first light L1 from the first pixel region 110 of the display panel 100 and the first light L1 from the second pixel region 120 by the optical refraction adjusting material 400 disposed in the recess regions A, The second light L2 emerging from the light source can be refracted.

13 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 13, the display device 10 may include a display panel 100, a light refracting portion 200, an adhesive structure 310, and a light shielding structure 320.

The adhesive structure 310 and the light blocking structure 320 may be disposed at a boundary between the first pixel region 110 and the second pixel region 120 of the display panel 100. [ The adhesive structure 310 may be disposed between the display panel 100 and the contact surface 223 and the light refracting portion 200 may be adhered to the display panel 100 through the adhesive structure 310. The light blocking structure 320 may be disposed at the boundary between the first pixel region 110 and the second pixel region 120 of the recess regions A and B and may be disposed at the boundary between the first pixel region 110 and the second pixel region 120 by the light blocking structure 320. [ The light interfering at the boundary between the region 110 and the second pixel region 120 can be blocked.

The first light L1 emitted from the first pixel region 110 of the display panel 100 is incident on the first inclined surface 221 of the light refraction pattern 220 and refracted in the light refraction pattern 220, You can proceed to display the image. The second light L2 emitted from the second pixel region 120 of the display panel 100 is incident on the second inclined surface 222 of the light refraction pattern 220 and is refracted in the light refraction pattern 220, You can proceed to display the image. As described above, the first light L1 and the second light L2 emitted from the display panel 100 are refracted in different directions in the light refracting unit 200 to form a stereoscopic image or a multi-view image.

The light refraction portion 200 can be adhered to the display panel 100 through the adhesive structure 310 so that the display device 10 can maintain a structurally stable shape. The display device 10 can be more effectively used for a display device having a large area such as a large-area 3D TV. The adhesive structure 310 and the light shielding structure 320 intercept the light interfering with the first pixel area 110 and the second pixel area 120 of the display panel 100, Or a multi-view image can be implemented.

14 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 14, the display device 10 may further include a light refraction adjusting material 400 disposed in the recess regions A and B.

The photorefractive modulator 400 may include, for example, ethanol, water, fluorocarbon, silicon oil, fluorine oil, liquid crystal, and the like. The first light L1 from the first pixel region 110 of the display panel 100 and the first light L1 from the second pixel region 120 by the optical refraction adjusting material 400 disposed in the recess regions A, The second light L2 emerging from the light source can be refracted.

Hereinafter, specific embodiments of the present invention have been described. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

10: Display device 100: Display panel
110: first pixel region 120: second pixel region
200: light refracting portion 211: first surface
212: second surface 220: light refraction pattern
221: first inclined surface 222: second inclined surface
223: contact surface 310: adhesive structure
320: light blocking structure 400: photorefractive material
410: first photorefractive modulator 420: second photorefractive modulator
510: upper transparent electrode 520: lower transparent electrode

Claims (10)

A display panel including a first pixel region and a second pixel region;
A light refracting portion disposed on the display panel, the light refracting portion having a first surface facing the display panel and a second surface opposite to the first surface; And
And a structure disposed on a boundary between the first pixel region and the second pixel region on the display panel,
Wherein the light refracting portion includes a light refraction pattern disposed on the first surface and having a first inclined surface, a second inclined surface, and a contact surface connecting the first inclined surface and the second inclined surface,
Wherein the light refraction pattern refracts light emitted from the display panel,
Wherein the first pixel region corresponds to the first inclined plane, the second pixel region corresponds to the second inclined plane,
A recessed region defined by the first inclined surface and the second inclined surface is disposed on the first surface,
The structure having a surface parallel to the display panel and the contact surface,
Wherein the structure includes a light blocking structure disposed in the recess region and blocking light interfering at a boundary between the first pixel region and the second pixel region. The method according to claim 1,
Wherein the contact surface is disposed at a boundary between the first pixel region and the second pixel region of the display panel,
And the light refraction part is bonded to the display panel through the contact surface. delete The method according to claim 1,
Wherein the structure further comprises an adhesive structure disposed between the display panel and the contact surface to adhere the light refraction pattern to the display panel. delete The method according to claim 1,
Wherein a size of a cross section of the light refraction pattern in a direction parallel to the display panel is reduced toward the display panel. The method according to claim 1,
Wherein the light refraction pattern is a polygonal prism. The method according to claim 1,
And a light refraction adjusting material disposed in the recessed region. 9. The method of claim 8,
Wherein the photorefractive modulator comprises two or more different types of photorefractive modulators,
Wherein the two or more different types of photorefractive materials are arranged in different recess regions. 10. The method of claim 9,
An upper transparent electrode provided between the first surface of the light refraction portion and the light refraction adjusting material,
And a lower transparent electrode provided on the display panel,
Wherein the refractive index of the photorefractive modulator changes according to a control signal provided by the upper transparent electrode and the lower transparent electrode.
KR1020150078848A 2015-06-03 2015-06-03 Display device KR101649826B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050021973A (en) * 2003-08-30 2005-03-07 샤프 가부시키가이샤 A multiple-view directional display
JP2006276161A (en) * 2005-03-28 2006-10-12 Casio Comput Co Ltd Liquid crystal display device
KR20090055913A (en) * 2007-11-29 2009-06-03 엘지디스플레이 주식회사 Display device having multi viewing zone
JP2010243941A (en) * 2009-04-09 2010-10-28 Panasonic Corp Stereoscopic image display device and multi-view display device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050021973A (en) * 2003-08-30 2005-03-07 샤프 가부시키가이샤 A multiple-view directional display
JP2006276161A (en) * 2005-03-28 2006-10-12 Casio Comput Co Ltd Liquid crystal display device
KR20090055913A (en) * 2007-11-29 2009-06-03 엘지디스플레이 주식회사 Display device having multi viewing zone
JP2010243941A (en) * 2009-04-09 2010-10-28 Panasonic Corp Stereoscopic image display device and multi-view display device

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