KR102016054B1 - Apparatus for displaying 2d/3d image - Google Patents

Abstract

The present invention provides an image panel for providing a light beam, a polarizing film provided in front of the image panel to polarize the light beam so as to have a horizontal direction with the ground, and is provided in front of the polarizing film, by the on / off of the switch A polarization controller for changing a polarization direction of the light beam emitted from the image panel, a liquid crystal lenticular lens sheet provided in front of the polarizer to refract or refract the light beam passing through the polarization controller according to the polarization direction, and The present invention provides a 2D / 3D image display device including a light blocking unit provided at regular intervals between the liquid crystal lenticular lens sheet and a polarization controller in order to reduce image noise generated from light rays refracted by the liquid crystal lenticular lens sheet.

Description

2D / 3D image display device {APPARATUS FOR DISPLAYING 2D / 3D IMAGE}

The present invention relates to a 2D / 3D image display device, and more particularly, to a 2D / 3D image display device having an improved structure of a lenticular lens sheet to remove a crosstalk phenomenon occurring in a 2D / 3D image display device. will be.

Recently, in order to selectively provide a 2D image or a 3D image according to the displayed image signal, a stereoscopic image display apparatus capable of switching between a 2D mode and a 3D mode is required, and thus various 2D / 3D images A compatible stereoscopic image display apparatus (hereinafter referred to as 2D / 3D image display apparatus) has been developed.

The 2D / 3D image display device displays a left eye image and a right eye image having a binocular parallax separated into a left eye and a right eye of the user, respectively, and the user can see a left eye image and a right eye provided by a stereoscopic image display device. By recognizing the dragon image through the retina of both eyes, it is possible to watch a three-dimensional image with a three-dimensional effect.

In general, the three-dimensional stereoscopic image is implemented by a holographic method, a stereoscopic method using stereoscopic special glasses, and an autostereoscopic method using non-glasses without stereoscopic special glasses. And the like.

1 is a schematic diagram of a 2D / 3D image display device 20 using the stereoscopic method.

Referring to FIG. 1, the 2D / 3D image display apparatus 20 using the stereoscopic method is configured to polarize the light emitted from the image panel 21 and the image panel 21 in which polarized light is generated in a specific direction. And a lenticular lens sheet 23 that refracts and disperses the polarized light.

FIG. 2A is a schematic diagram of a 2D mode implemented in the 2D / 3D image display apparatus 20, and FIG. 2B is a schematic diagram of a 3D mode implemented in the 2D / 3D image display apparatus 20. Referring to FIG.

Referring to FIG. 2A, when the polarization controller 22 is turned off, the refractive index anisotropy of the liquid crystal when the light emitted from the image panel 21 simply passes through the polarization controller 22 and the lenticular lens sheet 23. (Birefringence performance) is emitted without the lens effect caused by the lenticular lens, the viewer can watch the image in the 2D mode.

Referring to FIG. 2B, when the polarization controller 22 is turned on, the light rays emitted from the image panel 21 are changed in the polarization direction by the polarization controller 22, and the light rays are lenticular lens sheet 23. ), The lens effect caused by the lenticular lens is caused by the refractive index anisotropy (birefringence performance) of the liquid crystal, so that the viewer can watch the image in the 3D mode.

The 2D / 3D image display apparatus 20 is a method of refracting light by the polarization controller 22 and the lenticular lens sheet 23, and has a large aperture ratio and excellent transmission light, thereby providing a bright image.

However, the 2D / 3D image display device 20 using the conventional multi-view method has the following problems.

3 is a view illustrating a phenomenon in which a viewpoint is separated from a lenticular lens sheet 23 provided in a conventional 2D / 3D image display device.

Referring to FIG. 3, light rays projected through the image panel 21 are refracted through one lenticular lens 23 and transmitted to the viewer's naked eye.

However, such a ray has a problem in that crosstalk is high due to aberration of the lens in the region between the lenticular lenses.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a 2D / 3D image display apparatus including a light blocking unit capable of removing image noise.

Still another object of the present invention is to provide a 2D / 3D image display device capable of realizing excellent stereoscopic images.

In order to achieve the above object, the present invention provides an image panel for providing a light beam, a polarizing film provided in front of the image panel to polarize the light beam to have a horizontal direction with the ground, and is provided in front of the polarizing film, the switch Polarization controller for changing the polarization direction of the light emitted from the image panel by the on / off of, and a liquid crystal provided in front of the polarizing plate in order to refracted or refracted by the light beam passing through the polarization controller according to the polarization direction 2D / 3D image display including a lenticular lens sheet and a light blocking unit provided at regular intervals between the lenticular lens sheet and a polarization controller in order to reduce image noise generated from light rays refracted by the liquid crystal lenticular lens sheet. Provide the device.

Preferably, the lenticular lens sheet includes an intaglio lens sheet having a plurality of recesses and a plurality of convex lenses having refractive index anisotropy filled in the recesses of the intaglio lens sheet and refracting or refracting light rays according to the polarization direction. The plurality of recesses are formed adjacent to each other.

Preferably, the light blocking unit is attached to the lenticular lens sheet or the polarization controller so as to be located at the boundary position between the plurality of convex lenses, respectively.

Preferably, a glass panel made of glass is provided between the polarizing film and the polarization controller.

Preferably, an air gap is provided between the polarizing film and the polarization controller.

Preferably, a plastic panel is provided between the polarizing film and the polarization controller.

Preferably, the lenticular lens sheet includes an intaglio lens sheet having a plurality of concave portions, and a plurality of convex lenses filled in the concave portion of the intaglio lens sheet and refracting or refracting light rays according to a polarization direction. The concave portions are characterized in that they are formed spaced apart from each other.

Preferably, the light blocking unit is attached to the lenticular lens sheet so as to be positioned at positions except for the plurality of recesses, respectively.

Preferably, the light blocking unit is attached to the polarization controller so as to be located at each position except the plurality of recesses.

Preferably, the polarization controller is provided on the upper and lower plates of the non-conductive material spaced apart from each other, the conductive portion of the conductive material is applied to the voltage by the on / off of the upper plate and the lower plate, respectively, It characterized in that it comprises a liquid crystal element filled between the upper plate and the lower plate.

Preferably, the conductive portion is characterized in that the ITO coating portion coated on the opposite surface of the upper plate and the lower plate, respectively.

Preferably, the refractive index of the lenticular lens sheet and the glass panel is the same.

Preferably, the plurality of concave portions of the negative lens sheet are formed in an image panel direction.

Preferably, the plurality of concave portions of the negative lens sheet is characterized in that formed in the traveling direction of the light beam.

The present invention reduces the crosstalk phenomenon occurring in the 3D mode to provide a stereoscopic image to the viewer, it is possible to increase the image quality of the 3D image and provide an excellent stereoscopic image.

1 is a schematic diagram of a 2D / 3D image display device 20 using a stereoscopic method.
2A is a schematic diagram of a 2D mode implemented in a 2D / 3D image display device 20. FIG.
2B is a schematic diagram of a 3D mode implemented in the 2D / 3D image display device 20. FIG.
3 is a view illustrating a phenomenon in which a viewpoint is separated from a lenticular lens sheet provided in a conventional 2D / 3D image display device.
FIG. 4 is a diagram schematically illustrating when a 2D / 3D image display device is in a 2D mode according to an embodiment of the present invention.
FIG. 5 is a diagram schematically illustrating when a 2D / 3D image display device is in 3D mode according to an embodiment of the present invention; FIG.
6 is a schematic view of a liquid crystal lenticular lens sheet according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Unless otherwise defined, all terms in the specification are the same as the general meaning of terms understood by those skilled in the art, and if the terms used herein conflict with the general meaning of the terms, the terms used in the present specification shall be followed.

However, the invention to be described below is not intended to limit the scope of the present invention, but to describe the embodiments of the present invention, the same reference numerals throughout the specification represent the same components.

The present invention can provide an excellent stereoscopic image to the viewer by removing the crosstalk phenomenon that occurs when the light ray passes through the lenticular lens in the 3D mode, which will be described in detail with reference to the accompanying drawings. .

4 is a diagram schematically illustrating when the 2D / 3D image display apparatus 100 according to an embodiment of the present invention is in 2D mode, and FIG. 5 is a 2D / 3D image display apparatus according to an embodiment of the present invention. A diagram schematically showing when 100 is in 3D mode.

4 and 5, the present invention is largely an image panel 110, a polarizing film 120, a glass panel 160, a polarization controller 130, a liquid crystal lenticular lens sheet 140, and a light blocking unit 150. ) Sequentially.

The image panel 110 has a stacked structure such as a light beam (not shown), a light guide plate (not shown), a diffusion sheet (not shown), a light collecting film (not shown), and the like as a general LCD display device.

The polarizing film 120 is provided in front of the image panel 110 so that the light emitted from the image panel 110 has a horizontal direction with the ground.

In the exemplary embodiment of the present invention, only the image panel 110 and the polarizing film 120 are provided at the rear of the glass panel 160 to be described later. However, components of a 2D imaging apparatus generally used may be added.

Meanwhile, the glass panel 160 includes the image panel 110 and the polarizing film 120 implementing the 2D mode, the polarization controller 130, the liquid crystal lenticular lens sheet 140, and light blocking to implement the 3D mode. It is provided between the units 150, may be replaced by an air gap, or a panel made of plastic.

The polarization controller 130 is provided in front of the polarizing film 120, the polarization direction of the light emitted from the image panel 110 by the on / off of the switch 134 in a vertical, horizontal direction to the ground Change it.

Specifically, the polarization controller 130 is provided on the mutually opposite surfaces of the upper plate 131a and the lower plate 131b and the upper plate 131a and the lower plate 131b which are spaced apart from each other. And a liquid crystal element 132 filled between the upper and lower plates 131a and 131b of a conductive material to which a voltage is applied by turning on / off the 134.

The liquid crystal array (optical) of the liquid crystal element 132 is changed by the on (or off) of the switch 134, thereby changing the polarization direction of the light beam convex lens of the lenticular lens sheet to be described later When passing through, the refractive index anisotropy (birefringence effect) has the same refractive index or different refractive index as the negative lens sheet can implement a 2D / 3D mode.

Meanwhile, in FIGS. 4 and 5, the liquid crystal array of the liquid crystal elements 132 is omitted in the vicinity of the light rays 1a and 1b in order to highlight the traveling directions of the light rays 1a and 1b.

The conductive part 133 may be implemented with an ITO coating part which is a conductive material coated on opposite surfaces of the upper plate 131a and the lower plate 131b, respectively.

The liquid crystal lenticular lens sheet 140 is provided in front of the polarization controller 130 in order to refract or refract the light beam passing through the polarization controller 130 according to the polarization direction.

Specifically, the liquid crystal lenticular lens sheet 140 is filled with a concave lens sheet 142 having a plurality of concave portions and concave portions of the concave lens sheet 142 to refracted or refracted light rays according to the polarization direction. It includes a plurality of convex lenses 141.

Although the concave portion of the intaglio lens sheet 142 is illustrated to be formed in the direction of the image panel 110, the concave portion of the intaglio lens sheet 142 may be formed in a direction in which the light beam is opposite.

The plurality of convex lenses 141 are provided to be cured in the concave portion by using a liquid crystal element and a curing agent. In one embodiment of the present invention, as shown in Figure 4, the convex lens 141 is located adjacent to each other. That is, the plurality of recesses are formed adjacent to each other.

The light blocking unit 150 has a predetermined distance between the liquid crystal lenticular lens sheet 140 and the polarization controller 130 to remove an image noise phenomenon generated from the light rays refracted between the plurality of convex lenses 141. It is provided with.

The light blocking unit 150 is intended to remove image noise generated between the convex lenses 141 in the 3D mode, so that the liquid crystal lenticular lens sheet 140 is positioned at the boundary between the convex lenses 141. ) Or the polarization controller 130 is preferably provided.

The light blocking unit 150 is formed of a polarizing film 120 that can block the light passing through the polarization controller 130 in the 3D mode, the specific function and action of the light blocking unit 150 is as follows. same.

First, the operation in the 2D mode of the 2D / 3D image display device 100 according to an embodiment of the present invention will be described.

Referring to FIG. 4, the light rays 1a and 1b emitted from the image panel 110 are polarized in a direction parallel to the ground while passing through the polarizing film 120. This light beam passes through the polarization controller 130 through the glass panel 160, and the liquid crystal element 132 filled in the polarization controller 130 proceeds while the switch 134 is turned on. It does not change the polarization direction of the light beam. Of course, it is also possible to orient the liquid crystal so that the polarization direction is not changed in the state in which the switch 134 is off.

In the 2D mode, the polarization of the polarizing film 120 constituting the light blocking unit 150 so that the light rays (1a, 1b) passing through the polarization controller 130 can be all emitted to the liquid crystal lenticular lens sheet 140. The direction is the same as the polarization direction of the polarizing film 120 in front of the image panel.

Thereafter, the light rays 1a and 1b are emitted from the liquid crystal lenticular lens sheet 140 without refraction and transmitted to the viewer's naked eyes. The reason that the refraction does not occur is because the refractive indexes of the convex lens 141 and the concave lens sheet 142 of all the media through which the light beam travels, that is, the liquid crystal lenticular lens sheet 140 are the same.

Meanwhile, the operation in the 3D mode of the 2D / 3D image display device 100 according to an embodiment of the present invention will be described below.

Referring to FIG. 5, light rays 1a and 1b emitted from the image panel 110 are polarized in a direction horizontal to the ground while passing through the polarizing film 120. The light beam passes through the polarization controller 130 through the glass panel 160. The liquid crystal element 132 filled in the polarization controller 130 has the light beam in the state in which the switch 134 is turned off. By rotating the polarization direction by 90 degrees, the polarization is changed in a direction perpendicular to the exit surface of the image panel 110. Of course, it is also possible to orient the liquid crystal so that the polarization direction of the light beam is changed while the switch 134 is turned on.

Light rays 1a and 1b passing through the polarization controller 130 are emitted to the liquid crystal lenticular lens sheet 140, but the polarization direction of the polarization film 120 constituting the light blocking unit 150 is the image panel 110. Since the same as the polarization direction of the polarizing film 120 in front of), the light beam 1b where the light blocking unit 150 is located is blocked by the light blocking unit 150.

Thereafter, the unblocked light ray 1a is refracted by the liquid crystal lenticular lens sheet 140 and transmitted to the viewer's naked eye. The reason for the refraction is that the refractive index of the convex lens 141 and the negative lens sheet 142 of the lenticular lens sheet 140 is not equal to the medium through which the light beam rotated by 90 degrees.

In other words, since the polarization direction of the light blocking unit 150 is different from the polarization direction of the light beam in the 3D mode, since the light beam does not pass, crosstalk due to the reduction of the aperture ratio of the lens is reduced in all regions within the viewing angle. This enables effective 3D viewing.

6 is a view schematically showing the liquid crystal lenticular lens sheet 240 according to another embodiment of the present invention, the description of the essential components omitted is the same as that of FIG.

Since the convex lens 141 formed on the general liquid crystal lenticular lens sheet 140 has a smaller refractive index difference from the negative lens sheet due to the refractive anisotropy (birefringence) of the liquid crystal than the plastic lens, the lens depth (lens sag) is considered in consideration of the refractive index. ) That is, the lenticular lens is formed thicker than the general plastic lens.

Due to these structural characteristics, the lenticular lens uses a large amount of liquid crystals, thereby increasing the manufacturing cost and making the alignment of the liquid crystals difficult due to the large amount of liquid crystals.

In order to solve this problem, as illustrated in FIG. 6, the lenticular lens sheet 240 includes a negative lens sheet 242 having a plurality of recesses 241a and a recess 241a of the negative lens sheet 242. ) And a plurality of convex lenses 241 that do not refract or refract the light beam in the polarization direction, and the plurality of concave portions 241a may be spaced apart from each other. That is, the convex lens 241 according to another embodiment of the present invention having such a structure may have improved lens height and easily form liquid crystal alignment.

On the other hand, the flat part 241b, which is formed by spaced apart from the concave part 241a, may pass through the light as it is in the 3D mode due to the non-occurrence of the lens effect, thereby acting as noise of the image.

Therefore, the light blocking unit 150 of the present invention is located at the positions except for the plurality of recesses 241a, that is, the flat portion 241b, respectively, in the lenticular lens sheet 240 or the polarization controller 130 (FIG. 4). Reference).

In short, the present invention has the advantage of removing the aberration by blocking the light beam between the convex lens 141 in the 3D mode, and reduces the image noise.

As described above, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the technical spirit of the present invention, and the technical scope of the present invention is not limited to the contents described in the embodiments, but the claims It shall be determined by the scope and the range equivalent thereto.

100: 2D / 3D image display device 110: image panel
120: polarizing film 130: polarization controller
131a: top plate 131b: bottom plate
132: liquid crystal element 133: conductive portion
134: switch 140: liquid crystal lenticular lens sheet
141: multiple convex lens 142: negative lens sheet
150: light blocking unit 160: glass panel

Claims (18)

An image panel providing a light beam;
A polarizing film provided in front of the image panel to polarize the light beam to have a horizontal direction with the ground;
A polarization controller provided in front of the polarizing film and changing a polarization direction of light emitted from the image panel by on / off of a switch;
A liquid crystal lenticular lens sheet provided in front of the polarization controller so as not to refract or refract the light beam passing through the polarization controller according to the polarization direction; And
And a light blocking unit provided at regular intervals between the liquid crystal lenticular lens sheet and the polarization controller in order to reduce an image noise phenomenon generated from light rays refracted by the liquid crystal lenticular lens sheet.
The light blocking unit is a 2D / 3D image display device, characterized in that formed in the polarizing film that can block the light passing through the polarization controller in the 3D mode.
The method of claim 1,
The liquid crystal lenticular lens sheet includes a concave lens sheet having a plurality of concave portions, and a plurality of convex lenses having refractive index anisotropy filled in the concave portion of the concave lens sheet and refracting or refracting light rays according to the polarization direction.
And the plurality of concave portions are formed adjacent to each other.
The method of claim 2,
And the light blocking unit is attached to the liquid crystal lenticular lens sheet or the polarization controller so as to be positioned at boundary positions between the plurality of convex lenses, respectively.
delete The method of claim 1,
The polarization controller,
Filled between the upper and lower plates, which are spaced apart from each other, and conductive parts of the conductive material to which voltage is applied by on / off of the switch, respectively provided on opposite surfaces of the upper and lower plates, and the upper and lower plates. 2D / 3D video display device comprising a liquid crystal element.
The method of claim 5,
And the conductive part is an ITO coating part coated on opposite surfaces of the upper and lower plates, respectively.
The method of claim 1,
2D / 3D image display device, characterized in that the glass panel is provided between the polarizing film and the polarization controller.
The method of claim 1,
2D / 3D image display apparatus, characterized in that an air gap is provided between the polarizing film and the polarization controller.
The method of claim 1,
2D / 3D image display device, characterized in that a plastic panel is provided between the polarizing film and the polarization controller.
The method of claim 2,
And a plurality of concave portions of the intaglio lens sheet are formed in an image panel direction.
The method of claim 2,
And a plurality of concave portions of the intaglio lens sheet are formed in a traveling direction of light rays.
The method of claim 1,
The liquid crystal lenticular lens sheet includes a negative lens sheet having a plurality of concave portions and a plurality of convex lenses having refractive index anisotropy filled in the concave portion of the negative lens sheet and refracting or refracting light rays according to the polarization direction.
2D / 3D image display device, characterized in that the plurality of recesses are formed spaced apart from each other.
The method of claim 12,
And the light blocking unit is attached to the liquid crystal lenticular lens sheet or the polarization controller so as to be positioned at positions except for the plurality of concave portions, respectively.
The method of claim 12,
The polarization controller,
Filled between the upper and lower plates, which are spaced apart from each other, and conductive parts of the conductive material to which voltage is applied by on / off of the switch, respectively provided on opposite surfaces of the upper and lower plates, and the upper and lower plates. 2D / 3D video display device comprising a liquid crystal element.
The method of claim 14,
And the conductive part is an ITO coating part coated on opposite surfaces of the upper and lower plates, respectively.
The method of claim 12,
And a plurality of concave portions of the intaglio lens sheet are formed in an image panel direction.
The method of claim 12,
And a plurality of concave portions of the intaglio lens sheet are formed in a traveling direction of light rays.
The method of claim 1,
The liquid crystal lenticular lens sheet includes an intaglio lens sheet having a plurality of concave portions, and a plurality of convex lenses hardened after alignment to fill a concave portion of the intaglio lens sheet to refract light rays,
And the plurality of concave portions are formed adjacent to each other.

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