KR101959236B1 - Virtual reality display apparatus - Google Patents

Abstract

An embodiment of the present invention relates to a virtual reality display device, and a technical problem to be solved is a display structure including a multi-layer image and a stereoscopic image, and a display structure including two-dimensional video and three-dimensional (3D) video It is possible to display a depth from the data and a spatial separation of the depth from the depth image into a stereoscopic image and a spatial separation of the image, and to suppress the occurrence of the moire phenomenon.
To this end, an embodiment of the present invention includes a first screen for displaying a first image; A second screen disposed to be spaced apart from the first screen to display a second image including a left eye image and a right eye image; A polarizing retarder attached on one surface of a second screen opposite to the first screen to adjust a linear polarization angle of the first screen and the second screen; And a diffusion plate attached on one side of the first screen opposite to the second screen to diffuse the first image.

Description

[0001] VIRTUAL REALITY DISPLAY APPARATUS [0002]

One embodiment of the present invention relates to a virtual reality display device.

Recently, 3D image processing technology has been used in various fields such as education, training, medical, movie, and computer game. 3D image is more effective to feel presence feeling, real feeling, and natural feeling than 2D image.

Such a three-dimensional image display device requires a variety of technologies such as an input technology, a processing technology, a transmission technology, a display technology, a software technology, and the like. In particular, Research is necessary.

On the other hand, the most well-known method among the display methods of the three-dimensional image display device is the integral photography method, in which three-dimensional images formed by a fly-eye microlens array are recorded And transmission and reproduction.

1, a conventional three-dimensional image display device includes a microlens array 1 having fly-eye microlenses 2, a microlens array 1, (3) having individual pixels (4) at regular intervals from the pixel (4).

Then, when the two-dimensional projections are emitted from the projection carrier 3 to the vicinity of the focal plane of the microlens array 1, the two-dimensional projections are synthesized while passing through the microlenses 2 of the microlens array 1 The three-dimensional image 5 is displayed.

However, in the integrated photolithography method described above, the image quality of a three-dimensional image is degraded due to a moire effect. Here, the moiré effect is a phenomenon in which periodic patterns generate wave patterns while causing interference phenomena with each other.

In order to solve this problem, there has been an attempt to place a diffuser between two liquid crystal display panels. However, such a diffuser has an advantage of preventing a moire effect due to overlapping of two pixels, There is a problem that sharpness and luminance of 20% to 30% are lost due to the hage characteristic of the transparent display, and the loss ratio of the transparent display is also reduced proportionally, which is not efficient and the implementation rate of the color is also changed considerably .

(Document 1) Application No. 10-2003-7006716 (filed on May 17, 2003) (Document 2) Application No. 10-2003-7014295 (filed on November 01, 2003) (Document 3) Application No. 10-2005-7000758 (filed January 14, 2005)

One embodiment of the present invention relates to a display structure including a multi-layer image and a stereoscopic image, and a display structure including a space between the depth and the depth from the two-dimensional video and the three- A virtual reality display device capable of displaying a composite display of a separation characteristic and further suppressing occurrence of a moire phenomenon is provided.

In addition, one embodiment of the present invention provides a virtual reality display device that combines multi-layered screens that are selectively transparent and overlapping to maintain a constant distance.

In addition, an embodiment of the present invention provides a stereoscopic image display method using an ordinary compression algorithm and a stereoscopic image method using a binocular disparity method and a stereoscopic image method using an N parallax method, in order to individually display images on a superimposed display, And displays a normal algorithm on a multi-layer screen for a higher image combination, so that the viewing environment can be dispersed to the display environment at the time of occurrence of the congestion phenomenon of the non-eyeglass stereoscopic image method (when dizziness occurs) A virtual reality display device capable of avoiding a congestion phenomenon is provided.

A virtual reality display apparatus according to an embodiment of the present invention includes a first screen for displaying a first image; A second screen disposed to be spaced apart from the first screen to display a second image including a left eye image and a right eye image; A polarizing retarder attached on one surface of a second screen opposite to the first screen to adjust a linear polarization angle of the first screen and the second screen; And a diffusion plate attached on one side of the first screen opposite to the second screen to diffuse the first image.

The second screen may be disposed in close contact with the first screen without being separated from the first screen.

The first screen may be a TFT-LCD (Thin Film Transistor-Liquid Crystal Display).

A slit member attached on the other surface opposite to the one surface of the second screen and formed in a serpentine shape to project the left-eye image and the right-eye image to the left and right eyes of a user located in front of the other surface of the second screen .

The slit member may be arranged so that the first unit slit facing the user's left eye and the second unit slit facing the right eye are alternated with each other.

The slit member includes a plurality of unit slits, and the unit slit includes a first unit slit facing the left eye of the user and a second unit slit facing the right eye of the user and disposed to be alternated with the first unit slit .

The slit member includes a plurality of unit slits, the unit slit has an inclination angle of 5 to 85 degrees with respect to the reference plane, and the reference plane may be defined as a plane on which the user is located.

The slit member may include a plurality of unit slits, and the unit slit may have a convex embossed shape in the second screen direction.

The virtual reality display device according to an embodiment of the present invention can prevent the moire effect and improve sharpness and brightness.

In addition, an embodiment of the present invention can make the implementation of color more realistic and clear.

1 is a view showing a conventional three-dimensional image display apparatus.
2 is a diagram illustrating a virtual reality display apparatus according to an embodiment of the present invention.
3 is an exploded perspective view of the virtual reality display device of FIG.
4A and 4B are views showing the use state of the virtual reality display device of FIG.

The terms used in this specification will be briefly described and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

FIG. 2 is an exploded perspective view of the virtual reality display device of FIG. 2, and FIGS. 4A and 4B are views showing the use state of the virtual reality display device of FIG. 2 Fig.

2 to 3, a virtual reality display device 100 according to an exemplary embodiment of the present invention displays various information and / or images through two overlapping first screens 102 and a second screen 104 And includes a first screen 102, a second screen 104, a polarization retardation plate 106, a diffuser plate 110, and a slit member 108. The first screen 102, the second screen 104, That is, the virtual reality display apparatus 100 according to an embodiment of the present invention includes a first screen 102 and a second screen 104, which are disposed between the first screen 102 and the second screen 104, A diffusion plate 110 and a polarization retardation plate 106 adhered on each surface and a slit member 108 attached to the front of the second screen 104. At this time, the first screen 102 and the second screen 104 are at least partially overlapped.

The first screen 102 and the second screen 104 are arranged to be selectively overlapped, and one or more screens on one side of the transparent display are arranged horizontally and in a grid pattern.

The first screen 102 is a TFT-LCD (Thin Film Transistor-Liquid Crystal Display) for displaying a first image, and can display a two-dimensional image. Hereinafter, the first screen 102 will be referred to as a TFT-LCD.

The second screen 104 is a panel for displaying a second image positioned at a predetermined distance from the TFT-LCD 102 and including a left eye image and a right eye image, and may be implemented with various color LCD liquid crystals. At this time, the second screen 104 is separated from the first screen 102 by about 2 cm to 4 cm, but may be spaced apart by an interval of preferably 3 cm. The second screen 104 may alternately display the left-eye image and the right-eye image. Also, the second screen 104 can display a two-dimensional image or a three-dimensional image according to whether the light emitted from the front, rear, or side is divided into left eye or right eye. Accordingly, the multi-layer non-eyeglass stereoscopic image display apparatus 100 physically overlaps the first image and the second image by disposing the first screen 102 and the second screen 104 at a predetermined distance apart, It is possible to implement a 3D image effect, thereby preventing a congestion phenomenon felt by a user.

Alternatively, the second screen 104 may be disposed so as not to be separated from the first screen 102, but in close contact. Accordingly, the polarizing retardation plate 106 attached on the second screen 104 can be formed almost integrally with the diffusion plate 110 attached on the first screen 102. An anti-reflection film (not shown) may be disposed between the polarizing retardation plate 106 and the diffusion plate 110, which are selectively in close contact with each other.

In this case, since the second screen 104 and the first screen 102 are in close contact with each other, the moire effect due to color interference, which may be caused by a distance between the second screen 104 and the first screen 102 Can be significantly reduced.

On the other hand, an LCD liquid crystal is a device for displaying the liquid crystal properties by changing the arrangement of molecules when a voltage is applied. The liquid crystal is injected and arranged in a narrow gap between two glass plates, And a character or an image is displayed by using the optical refraction change occurring at this time. The detailed description will be omitted.

In addition, the TFT-LCD 102 and the second screen 104 may be used to display data or data formats that visually represent characters, symbols, plaintexts, images, still and video animations, .

The TFT-LCD 102 and the second screen 104 arrange closed-polarized filters on the front and back surfaces of each liquid crystal active element. As a result of the characteristic operation of such a liquid crystal display, the plane polarization of the light coming from the front of the second screen 104 crosses the polarization plane of the back surface of the TFT-LCD 102. [ LCD 102 and the second screen 104 in order to align the light emitted from the second screen 104 with the rear polarizing filter of the TFT- Install the delay plate.

The polarization retardation plate 106 causes a phase angle variation or delay that is less than or equal to the incident light wavelength. Further, the polarization retardation plate 106 does not generate a clear color interference pattern when used in the present multi-layer stereoscopic image display apparatus 110. [

The polarizing retardation plate 106 has disadvantages such as a lack of unstable exposure to bright light and / or discoloration, manufacturing cost, and brittleness according to time, but in order to compensate for such disadvantages, And is made of a material having properties. Here, the biaxial polypropylene may be made of a transparent and flexible film, but the biaxial polypropylene is not limited to the biaxial polypropylene but may be formed of a lacquer or a coating.

Theoretically, it is possible to arrange the polarization retardation plate 106 anywhere between the TFT-LCD 102 and the second screen 104, but using the polarization retardation plate 106 of the same technology as the polyester, 104 on the back side. This is to avoid interference where the diffusion pattern to be applied to the polarization retardation plate 106 deteriorates the image of the multi-layer stereoscopic image display apparatus 100. [ Here, the interference pattern is generated due to the Moire effect, which is interference due to the minute temporal mismatch between the structural surfaces of the TFT-LCD 102 and the second screen 104, and the effect that white polarized light is separated into rainbow colors.

In the present invention, the diffusion of light is used to eliminate the interference pattern generated between the TFT-LCD 102 and the second screen 104.

In addition, a diffusion plate 110 is installed in front of the TFT-LCD 102. Here, the diffusion plate 110 diffuses the image displayed on the TFT-LCD 102.

The slit member 108 is formed as a separate layer from the polarization retardation plate 106, and is formed in an embossed shape having a predetermined length or a pattern having a predetermined check and line shape. The slit member 108 distinguishes pixels that can be seen by the left eye and the right eye by differently applying the received images so that the stereoscopic feeling can be felt by the binocular parallax without wearing glasses.

The slit member 108 is preferably provided on the front surface of the second screen 104, and is formed in an embossed shape having a predetermined length in a diagonal line. Here, the slit member 108 may be divided into a slit division method including a parallax barrier method and a lenticular method or a tracking method time division method so as to optically distinguish the left image and the right image on the second screen 104, .

More specifically, the slit member 108 includes a plurality of unit slits. At this time, the unit slit is arranged such that unit slits facing the left eye of the user and unit slits facing the right eye are alternated with each other.

The unit slit may include a first unit slit facing the left eye of the user and a second unit slit facing the right eye of the user and alternating with the first unit slit. That is, the unit slit may include a first unit slit, a second unit slit, and an n-th unit slit, which are alternated with each other.

The unit slit is formed in a serpentine shape so as to have an inclination angle (?) Of 5 to 85 degrees with respect to the reference plane. At this time, when the unit slit has an inclination angle? Of 5 degrees or less with respect to the reference plane, or when the unit slit has an inclination angle? Of 85 degrees or more with respect to the reference plane, There is a problem in that it is difficult to secure a viewing angle as in Fig.

Meanwhile, the reference plane may be defined as a ground on which a user is located.

Further, the unit slit is formed to have a convex embossed shape in the direction of the second screen 104, that is, forward.

The material of the slit member 108 is acrylic, glass, LCD, optical retardation plate, and film, each of which may be uniformly and single-layered.

The slit member 108 is adhered to the front surface of the second screen 104. The slit member 108 is bonded to the front surface of the second screen 104 to determine a predetermined thickness and to physically form a gap and a UV liquid curing type front surface, It can be adhered in an adhesive manner through an adhesive having a predetermined thickness such as a slope.

Here, the slit member 108 may include a left eye L on a flat panel display in which red, green, and blue subpixels are alternately arranged in the row direction, for displaying contents separated by N parallax and N parallax, , Right eye (R), or N eye, and is physically attached to the flat panel display. Thus, the slit member 108 can physically optically constitute a right eye image in the right eye and a left eye image in the left eye, so that different images are displayed on the eye of the observer so that three-dimensional images can be sensed.

4A to 4B, the virtual reality display device 100 applies different images to the pixels of the left eye and the right eye differently, and thereby, by using binocular parallax without wearing glasses, It can be displayed on the front side of the second screen 104 so that a three-dimensional feeling can be felt.

In the virtual reality display apparatus 100 configured as described above, when visible light having an average wavelength of 560 nm is used, the retardation of the polarization retardation plate 106 becomes smaller than or equal to 560 nm. Thus, according to the present invention, the polarization retardation plate 106 causes a phase angle delay that is less than or equal to one wavelength of light incident on the multi-layer stereoscopic image display device 110. This is also referred to as linear displacement, which is less than or equal to 560 nm of incident light.

Meanwhile, the virtual reality display device 100 according to the present invention may further include a third screen (not shown).

The third screen is located behind the TFT-LCD 102, with some more overlapping the TFT-LCD 102 and the second screen 14, creating a stereoscopic image display and a normal (2D) image display.

On the other hand, the divergence of the light source can be selectively obtained from the polarization source for display of the first image in the TFT-LCD 102, and further, between the TFT-LCD 102 and the second screen 104, May be omitted).

Accordingly, the virtual reality display device 100 according to the present invention includes all of processing speed, color, repetition, visual effect, looming, scrolling, flicker fading and size enhancement and change, It includes a vertical plate, a horizontal plate, an oblique plate, a mosaic pattern, a color difference, and a time difference classification method. It also includes a side by side method, And may alternatively display a change in stereoscopic (3D) image in a normal (2D) image.

In addition, a frame member (not shown) made of a polypropylene resin composition may be provided at the rim of the second screen 104 to improve the impact resistance and rigidity of the rim of the second screen 104.

The polypropylene resin composition is a polypropylene impact copolymer composition comprising a polypropylene homopolymer and an ethylene-propylene block copolymer. At this time, the polymers are resins mixed in the polymerization step.

The polypropylene homopolymer maintains the mechanical rigidity of the polypropylene resin composition and imparts an appropriate degree of heat resistance. The polypropylene homopolymer may be included in an amount of 70 to 95% by weight based on the total weight of the polypropylene impact copolymer. If the content of the polypropylene homopolymer is less than 70% by weight, the rigidity of the final polypropylene resin composition may deteriorate and the desired properties of the final product may not be satisfied. When the content exceeds 95% by weight, the content of the ethylene- Is low, it is difficult to exhibit the impact resistance characteristic.

The ethylene-propylene block copolymer is prepared by continuously polymerizing a polypropylene homopolymer in a subsequent series of reaction apparatuses. The ethylene-propylene block copolymer of the present invention has a role of imparting impact resistance to the polypropylene resin composition .

The content of the ethylene-propylene block copolymer relative to the total weight of the polypropylene impact copolymer may be 5 to 30% by weight. When the content of the ethylene-propylene block copolymer is less than 5% by weight, impact resistance is not exhibited. When the content of the ethylene-propylene block copolymer is more than 30% by weight, the stiffness is lowered.

The ethylene content with respect to the total weight of the ethylene-propylene block copolymer is 30 to 70% by weight, preferably 40 to 60% by weight. If the ethylene content in the copolymer is less than 30% by weight, the amorphous portion improving the impact in the polymer block copolymer to be polymerized decreases and the impact resistance property decreases. When the ethylene content exceeds 70% by weight, It is possible to reduce the impact resistance due to the delamination at the time of impact.

The ethylene-propylene block copolymer may have an intrinsic viscosity (dl / g) of 3 to 8 dl / g. The intrinsic viscosity of the ethylene-propylene block copolymer extracted from the decalin solution at 135 ° C. was measured with respect to 4 g of the polypropylene impact copolymer using a viscosity meter. If the intrinsic viscosity is less than 3, the molecular weight of the polymerized ethylene-propylene block copolymer is low, which makes it difficult to absorb the impact. When the intrinsic viscosity is more than 8, it is difficult to polymerize in the reactor.

The polypropylene impact copolymer has a weight average molecular weight (Mw) of 250,000 to 2,000,000. If the weight average molecular weight is less than 250,000, the molecular weight is low and the rigidity is lowered, and the shock absorption is difficult. When the weight average molecular weight is more than 2000,000, polymerization in the reactor is difficult.

The present invention is not limited to the above-described embodiments, but may be embodied in many other forms without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100: virtual reality display device 102: first screen (TFT-LCD)
104: Second screen 106: Polarization retardation plate
108: slit member 110: diffuser plate

Claims (8)

In a virtual reality display device,
A first screen for displaying a first image;
A second screen disposed to be spaced apart from the first screen to display a second image including a left eye image and a right eye image;
A second screen attached to one side of the second screen opposite to the first screen to adjust the linear polarization angle of the first screen and the second screen to cause a phase angle variation or delay less than or equal to the wavelength of the incident light, A polarizing retarder comprising a biaxial polypropylene having properties;
A diffusion plate attached to one surface of the first screen opposite to the second screen to diffuse the first image displayed on the first screen; And
A slit member attached on the other surface opposite to the one surface of the second screen and formed in a serpentine shape to project the left-eye image and the right-eye image to the left and right eyes of a user located in front of the other surface of the second screen Including,
Wherein the slit member includes a plurality of unit slits,
Wherein the unit slit has an inclination angle of 5 to 85 degrees with respect to the reference plane,
Wherein the reference plane is defined as a ground on which the user is located.
In a virtual reality display device,
A first screen for displaying a first image;
A second screen facing the first screen and displaying a second image including a left eye image and a right eye image;
A second screen attached to one side of the second screen opposite to the first screen to adjust the linear polarization angle of the first screen and the second screen to cause a phase angle variation or delay less than or equal to the wavelength of the incident light, A polarizing retarder comprising a biaxial polypropylene having properties;
A diffusion plate attached to one surface of the first screen opposite to the second screen to diffuse the first image displayed on the first screen; And
A slit member attached on the other surface opposite to the one surface of the second screen and formed in a serpentine shape to project the left-eye image and the right-eye image to the left and right eyes of a user located in front of the other surface of the second screen Including,
Wherein the slit member includes a plurality of unit slits,
Wherein the unit slit has an inclination angle of 5 to 85 degrees with respect to the reference plane,
And the polarizing retardation plate attached on the second screen is formed integrally with the diffuser plate attached on the first screen.
The method according to any one of claims 1 and 2,
Wherein the first screen is a TFT-LCD (Thin Film Transistor-Liquid Crystal Display).
delete The method according to any one of claims 1 and 2,
Wherein the slit member is disposed so that the first unit slit facing the left eye of the user and the second unit slit facing the right eye are alternated with each other.
The method of any one of claims 1 and 2,
Wherein the slit member includes a plurality of unit slits, wherein the unit slit includes a first unit slit facing the user's left eye and a second unit slit facing the right eye of the user and disposed to be alternating with the first unit slit Wherein the virtual reality display device is a virtual reality display device.
delete The method according to any one of claims 1 and 2,
Wherein the slit member includes a plurality of unit slits, and the unit slit has an embossed shape convex in the second screen direction.

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