KR101313652B1 - Three dimensional image display device and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a stereoscopic image display device and a manufacturing method thereof. A stereoscopic image display device according to the present invention includes a display panel for displaying an image; A three-dimensional image forming panel disposed on the display panel and converting a two-dimensional image from the display panel into a three-dimensional three-dimensional image, wherein the three-dimensional image forming panel includes a plurality of lens forming guide portions formed on an insulating substrate; And a first substrate including a plurality of electrode layers formed on the lens forming guide portion, a second substrate facing the first substrate, and a liquid crystal layer positioned between the first substrate and the second substrate. Accordingly, a stereoscopic image display device capable of converting two-dimensional (3D) and three-dimensional (3D) displays is provided.

Description

3D image display device and manufacturing method thereof {THREE DIMENSIONAL IMAGE DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF}

1 is a block diagram showing a three-dimensional display device of the barrier type according to the prior art,

2 is a block diagram showing a three-dimensional display device of the lenticular lens type according to the prior art,

3 is a view for explaining the configuration of a stereoscopic image display device according to the present invention;

4 is an exploded perspective view illustrating the structure of a stereoscopic image forming panel according to the present invention;

5A and 5B are diagrams for explaining a driving principle of a stereoscopic image forming panel according to the present invention;

6A to 6D are views for explaining a method of manufacturing a stereoscopic image forming panel according to the present invention.

Description of Reference Numerals of Major Parts of the Drawings [

10 liquid crystal display device 20 thin film transistor substrate

30 color filter substrate 40 liquid crystal layer

50: display panel 60: light source

100: stereoscopic image display panel 110: first insulating substrate

120: lens forming guide portion 130: electrode layer

140: first alignment layer 150: first substrate

160: second insulating substrate 170: second alignment film

180: second substrate 190: liquid crystal layer

200: mask

The present invention relates to a stereoscopic image display apparatus and a manufacturing method thereof, and more particularly, to a stereoscopic image display apparatus capable of converting two-dimensional (3D) and three-dimensional (3D: three-dimensional) display and a manufacturing method thereof will be.

One of the most commonly used methods for implementing a stereoscopic display technology is a method using binocular display. The method of using bilateral parallax is to express the image taken by the camera corresponding to the left eye and the image taken by the camera corresponding to the right eye on the same display module, and to make it enter the viewer's left eye and the right eye, respectively. By inputting images observed from different angles to the eyes, the viewer can recognize the sense of space through the brain.

In this case, a method of dividing the image into the viewer's left eye and the right eye may be divided into a method of using a barrier and a method of using a lenticular lens, which is a kind of cylindrical lens. .

1 is a block diagram illustrating a barrier type stereoscopic display device according to the related art, and illustrates a method of using a barrier.

The barrier type stereoscopic display device according to the related art is a display module 1 in which a left eye image L and a right eye image R are displayed as a stereoscopic image display surface, as shown in FIG. The display module 1 is disposed to face the display module 1 and includes a slit barrier 2 alternately formed with an opening 2a and a blocking part 2b.

In the barrier type, light is blocked using the light shielding portion 2b of the slit barrier 2 to divide the left eye image L and the right eye image R into the viewer's left eye and right eye, respectively.

FIG. 2 is a block diagram illustrating a stereoscopic display apparatus in which a lenticular lens type according to the prior art is used to describe a method of using a lenticular lens.

As shown in FIG. 2, the lenticular lens type stereoscopic display device according to the related art is provided with a display module 3 on which a left eye image L and a right eye image R are respectively displayed, and on one side of the display module 3. And an attached lenticular screen 4.

The barrier type of FIG. 1 divides the left and right eye images (R, L) by blocking light, whereas the lenticular lens type of FIG. 2 uses the lenticular lens to change the light paths so that the self-eye and right eye images (L, R) are changed. The advantage is that the brightness is not lowered as compared with the barrier type.

However, such a conventional three-dimensional display device of the barrier type or lenticular lens type is implemented mainly on a stereoscopic image, so that it is difficult to turn ON / OFF the functions of the barrier or lenticular lens. There is a drawback that it is difficult to selectively implement the image by mutual switching.

Accordingly, an object of the present invention is to provide a stereoscopic image display device capable of converting two-dimensional (3D) and three-dimensional (3D) displays.

Another object of the present invention is to provide a method of manufacturing a stereoscopic image display device capable of converting two-dimensional (3D) and three-dimensional (3D) displays.

The above object is, according to the present invention, a display panel for displaying an image; A three-dimensional image forming panel disposed on the display panel and converting a two-dimensional image from the display panel into a three-dimensional three-dimensional image, wherein the three-dimensional image forming panel includes a plurality of lens forming guide portions formed on an insulating substrate; And a first substrate including a plurality of electrode layers formed on the lens forming guide portion, a second substrate facing the first substrate, and a liquid crystal layer positioned between the first substrate and the second substrate. Achieved by an image display device.

Here, the lens forming guide portion may be provided in a shape in which the area decreases from the first substrate to the second substrate.

In addition, the lens forming guide portion may have one of substantially triangular, semi-circular, and trapezoidal cross sections.

In addition, the lens forming guide part may extend from one side of the insulating substrate to the other side.

The lens forming guide part may include an organic material that transmits light.

Here, the electrode layer may be removed on the insulating substrate between the lens forming guide portions.

The first alignment layer may be formed on the insulating substrate between the electrode layer and the electrode layer.

In addition, the second substrate may include a second alignment layer.

Here, when a voltage is applied to the electrode layer, a convex lens-shaped transverse electric field is formed between the electrode layers on the lens forming guide portion adjacent to each other, and the plurality of liquid crystal molecules constituting the liquid crystal layer are along an equipotential line of the transverse electric field formed between the electrode layers. It may be arranged in the shape of a reticular lens.

The display panel may include a liquid crystal display panel, and may further include a light source disposed at a rear side of the display panel to irradiate light to the rear surface of the display panel.

Another object of the present invention is to prepare an insulating substrate according to the present invention; Forming a photoresist film on the insulating substrate; Patterning the photoresist to form a plurality of lens formation guide portions having a shape in which the area decreases away from the insulating substrate; It is achieved by a method of manufacturing a stereoscopic image display device comprising the step of forming an electrode layer on the lens forming guide portion.

The forming of the lens forming guide unit may include disposing one of a slit mask and a half tone mask on the photosensitive film; Exposing the photosensitive film using a slit mask or a halftone mask; And developing the photosensitive film to manufacture a plurality of lens forming guide parts.

The forming of the electrode layer may include forming the electrode layer on the front surface of the insulating substrate to cover the lens forming guide part; Patterning the electrode layer to remove the electrode layer between the lens forming guide parts.

In addition, the lens forming guide portion may have any one of substantially triangular, semi-circular, and trapezoidal cross sections.

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

As shown in FIG. 3, the stereoscopic image display apparatus according to the present invention includes a display panel 10 displaying an image and a stereoscopic image forming panel 100 disposed on the display panel 10.

The display panel 10 according to the present invention is the same as a conventional liquid crystal display (LIQUID CRYSTAL DISPLAY). Specifically, as shown in FIG. 3, the display panel 10 includes a liquid crystal panel 50 and a light source 60 positioned behind the liquid crystal panel 50. The liquid crystal panel 50 includes a thin film transistor substrate 20 on which a thin film transistor (TFT) is formed, a color filter substrate 30 on which a color filter layer is formed and oppositely attached to the thin film transistor substrate 20. The liquid crystal layer 40 is positioned between the substrates 20 and 30. Such a liquid crystal display is a device for displaying a desired image by adjusting the light transmittance of liquid crystal cells arranged in a matrix form according to image signal information, and using light emitted from the light source 60. Thus, an image is formed on the liquid crystal panel 50.

In the exemplary embodiment of the present invention, a liquid crystal display is used as an apparatus for displaying a 2D image as an example. However, the present invention is not limited thereto, and an organic light emitting diode (OLED), a plasma display panel (PDP), a field emission display (FED), a vacuum fluorescent display (VFD), and the like may also be applied.

The stereoscopic image forming panel 100 is positioned on the display panel 10.

As shown in FIG. 3, the stereoscopic image forming panel 100 according to the present invention includes a first substrate 150, a second substrate 180 and both substrates that are opposite to the first substrate 150. And a liquid crystal layer 190 positioned between 150 and 180.

The first substrate 150 covers the plurality of lens forming guide portions 120, the plurality of electrode layers 130 formed on the lens forming guide portion 120, and the electrode layers 130 on the first insulating substrate 110. The first alignment layer 140 is included.

The first insulating substrate 110 may be made of an insulating material such as glass, quartz, ceramic, or plastic.

On the first insulating substrate 110, a plurality of lens forming guide parts 120 having a shape in which a cross-sectional area decreases from the first substrate 150 to the second substrate 180 are positioned. Here, the cross section of the lens forming guide portion 120 is a cross section cut perpendicularly to the arrangement direction of the second substrate 180 from the first substrate 150. As a specific example of the lens forming guide unit 120 having such a shape, as shown in FIG. 3, a cross section cut in the arrangement direction of the second substrate 180 from the first substrate 150 may have a triangle. Can be. However, the present invention is not limited thereto, and the lens forming guide unit 120 may have a semicircle, trapezoid, or the like shape. As shown in FIG. 4, the lens forming guide unit 120 may be provided in a triangular prism shape extending from one side to the other side. The plurality of lens forming guide parts 120 are disposed to be spaced apart from each other by a predetermined interval d. The spacing d between the lens forming guides 120 is set according to the spacing between the pixels of the display panel 10. For example, although not specifically illustrated, the distance d between the lens forming guide unit 120 may be manufactured to correspond to a distance between one pixel or two pixels. here,

The lens forming guide part 120 may be made of a transparent material through which light may pass. Specifically, the lens forming guide part 120 may be made of an organic material such as a passivation layer constituting the display panel 10. For example, it may be an acrylic polymer. However, the present invention is not limited thereto, and any material may be used as long as the material can be manufactured in the above-described shape.

The lens forming guide unit 120 is intended to help the arrangement of the liquid crystal molecules of the liquid crystal layer 190 to be described later to form a lenticular lens. That is, the electrode layer 130 on the lens forming guide portion 120 is formed with a convex lens-shaped transverse electric field by the lens forming guide portion 120 having such a shape. This will be described in detail in the paragraph describing the stereoscopic image forming principle of the stereoscopic image forming panel 100.

The electrode layer 130 is formed on the lens forming guide part 120. The electrode layer 130 is made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). The electrode layer 130 according to the present invention is removed on the insulating substrate 110 between the lens forming guide portion 120. That is, the electrode layer 130 according to the present invention is formed only on the lens forming guide portion 120.

The first alignment layer 140 is formed on the insulating layer 110 which is not covered by the electrode layer 130 and the electrode layer 130. That is, the first alignment layer 140 covers the entire surface of the first insulating substrate 110. As shown in FIG. 4, the first alignment layer 140 helps liquid crystal molecules forming the liquid crystal layer 190 to be easily arranged in the shape of a lenticular lens. In the first alignment layer 140, a pretilt angle is formed to easily arrange liquid crystal molecules in a desired shape along an equipotential line of the transverse electric field formed between the electrode layers 130. Here, the pretilt angle means that the surface of the first alignment layer 140 forms a predetermined inclination angle by rubbing the surface of the first alignment layer 140 at a predetermined angle, so that the liquid crystal molecules are quickly arranged according to the rubbed inclination angle. Angle of inclination formed on the surface of the alignment film so that it can be made.

The second substrate 180 includes a second alignment layer 170 formed on the second insulating substrate 160 formed of the same or similar material as the first insulating substrate 110. The second alignment layer 170 is the same as the first alignment layer 140 described above, and a pretilt angle is formed in the second alignment layer 170 such that the liquid crystal molecules are arranged in the shape of a lenticular lens like the first alignment layer 140. . The second substrate 180 is not separately formed with an electrode layer capable of forming an electric field.

The liquid crystal layer 190 is positioned between the first substrate 150 and the second substrate 180. The liquid crystal layer 190 is a material having the same dielectric anisotropy as the liquid crystal layer 30 of the display panel 10 described above. The liquid crystal layer 190 is composed of a plurality of liquid crystal molecules.

Hereinafter, the stereoscopic image forming principle of the stereoscopic image forming panel 100 configured as described above will be described with reference to FIGS. 5A to 5C.

As described above, the lens formation guide 120 has a shape in which the cross-sectional area decreases from the first substrate 150 to the second substrate 180, and thus the electrode layer 130 formed on the surface of the lens formation guide 120. ) Is also provided in a shape corresponding to the lens forming guide portion 120. That is, the distance l between the electrode layers 120 between the adjacent electrode layers 130 is provided to increase in the direction from the first substrate 150 to the second substrate 180. Due to the shape of the electrode layer 130, the liquid crystal layer 190 between the two substrates 150 and 180 has a stereoscopic image non-forming mode (see FIG. 5A) and a stereoscopic image forming mode depending on whether the electrode layer 130 is applied with voltage. (See Fig. 5B).

Specifically, when no voltage is applied to the electrode layer 130, as shown in FIG. 5A, the liquid crystal molecules maintain a normal arrangement. That is, light emitted from the display panel 10 passes through the stereoscopic image forming panel 100 without refraction. Accordingly, in the 3D image display device, an image of a plane (two dimension) is implemented. However, when a voltage is applied to the electrode layer 130, as shown in FIG. 5B, the liquid crystal molecules are arranged in the shape of a lenticular lens along an electric field formed between adjacent electrode layers 130. That is, when a voltage is applied to the above-described electrode layer 130, a transverse electric field is formed between the adjacent electrode layers 130, and the formed transverse electric field is formed in the convex lens shape by the shape of the electrode layer 130. Accordingly, the plurality of liquid crystal molecules are arranged along the equipotential lines, and the liquid crystal molecules between the adjacent lens forming guide parts 120 form a lenticular lens as a whole. Accordingly, the liquid crystal layers 190 between the adjacent lens forming guides 120 have different refractive index distributions according to positions, and the refractive index distribution is similar to the refractive index distribution of the lenticular lens. ) Is condensed. Therefore, the light irradiated from the display panel 10 is refracted while being separated into left and right eyes by the refractive index distribution formed on the stereoscopic image forming panel 100, and passes through the stereoscopic image forming panel 100. An image of (3D: Three Dimensional) is implemented.

Accordingly, as the voltage applied to the electrode layer 130 is applied or cut off, two-dimensional (3D) and three-dimensional (3D) display conversion is possible.

In particular, although not shown, the present invention may control the concentration distribution formed by the liquid crystal molecules by controlling the magnitude of the voltage applied to each electrode layer 130. That is, the refractive index distribution may be set differently for each position.

Although not shown, a plurality of images may be implemented in one display device by attaching a barrier layer to an outer surface of the second substrate 180.

Hereinafter, a manufacturing method of a stereoscopic image display device according to the present invention will be described with reference to FIGS. 6A to 6D. In the following description, a manufacturing method of the stereoscopic image forming panel 100 will be described in detail, and the manufacturing method of the display panel 10 follows a conventional method.

First, as shown in FIG. 6A, a photosensitive film 125 made of an organic material is coated on the first insulating substrate 110. Here, the photosensitive film 125 may be, for example, an acrylic organic material, and other organic or inorganic materials may be used. In the description of the present invention, the photosensitive film 125 having the property of removing the irradiated light is described as an example, but the present invention is not limited thereto, and the photosensitive film 125 having the property of removing the irradiated light is also applicable.

Thereafter, as shown in FIG. 6B, a mask 200 is disposed on the photosensitive film 125. The mask 200 according to the present invention is a slit mask, as shown in FIG. 6B, and a half tone mask may be applied. The mask 200 is provided with slits, and the slits are provided for forming the lens forming guide portion 120 (see FIG. 6C) to be described later. The slit is provided so that light is blocked at the center portion, and is configured to gradually increase the degree of exposure to both sides of the center portion. The portion of the mask 200 corresponding to the region where the lens forming guide portion 120 (see FIG. 6C) is not formed is configured such that the photosensitive film 125 can be completely exposed.

After exposure using the mask 200 having such a slit (see FIG. 6B) and development, the lens forming guide 120 having the shape shown in FIG. 6C is completed. Thereafter, an electrode layer 130 made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO) is formed on the insulating substrate 110 and the lens forming guide part 120.

Subsequently, as shown in FIG. 6D, the transparent electrode layer 130 is patterned according to a conventional method to form an electrode layer 130 positioned only on the lens forming guide part 120. In addition, according to a conventional method, although not shown, a first alignment layer 140 (see FIG. 3) is formed.

Next, although not shown, a second alignment layer 170 (see FIG. 3) is formed on the second insulating substrate 160 (see FIG. 3) to manufacture a second substrate 180 (see FIG. 3) according to a conventional method. After the first substrate 150 and the second substrate 180 (see FIG. 3) are bonded together, the liquid crystal layer 190 (see FIG. 3) is injected to complete the stereoscopic image display panel 100 (see FIG. 3). In another embodiment, after dropping the liquid crystal layer 190 (see FIG. 3) on the first substrate 150, the second substrate 180 (see FIG. 3) and the first substrate 150 are bonded to each other to display a stereoscopic image. The panel 100 (see Fig. 3) may be completed.

As described above, according to the present invention, a stereoscopic image display device capable of converting two-dimensional (3D) and three-dimensional (3D) displays is provided.

In addition, a method of manufacturing a stereoscopic image display device capable of converting two-dimensional (3D) and three-dimensional (3D) displays is provided.

Claims (14)

A display panel on which an image is displayed; A stereoscopic image forming panel disposed on the display panel and converting a 2D image from the display panel into a 3D stereoscopic image; The three-dimensional image forming panel includes a first substrate including a plurality of lens forming guide portions formed on an insulating substrate and a plurality of electrode layers formed only on a surface of the lens forming guide portion, a second substrate facing and facing the first substrate; It comprises a liquid crystal layer positioned between the first substrate and the second substrate, The lens formation guide portion has a shape in which the cross-sectional area decreases toward the second substrate from the first substrate, And the electrode layer is formed in a shape corresponding to the lens formation guide portion. delete The method of claim 1, And the lens forming guide unit has one of a cross section, a triangle, a semicircle, and a trapezoidal shape. The method of claim 1, The lens forming guide unit extends from one side of the insulating substrate to the other side. The method of claim 1, And the lens forming guide part comprises an organic material that transmits light. The method of claim 1, And the electrode layer is removed on the insulating substrate between the lens forming guide portions. The method of claim 1, And a first alignment layer is formed on the insulating substrate between the electrode layer and the electrode layer. The method of claim 1, And the second substrate includes a second alignment layer. The method of claim 1, When a voltage is applied to the electrode layer, a convex lens-shaped transverse electric field is formed between the electrode layers on the lens forming guide portion adjacent to each other. And a plurality of liquid crystal molecules constituting the liquid crystal layer are arranged in a reticular lens shape along an equipotential line of a transverse electric field formed between the electrode layers. The method of claim 1, The display panel includes a liquid crystal display panel, And a light source disposed behind the display panel to irradiate light to the rear surface of the display panel. Preparing an insulating substrate; Forming a photoresist film on the insulating substrate; Patterning the photoresist to form a plurality of lens formation guides having a shape in which the area decreases as the distance from the insulating substrate increases upward; And forming an electrode layer only on the surface of the lens forming guide part, And the electrode layer is formed in a shape corresponding to the lens formation guide portion. 12. The method of claim 11, The forming of the lens forming guide part may include disposing one of a slit mask and a half tone mask on the photosensitive film; Exposing the photosensitive film using the slit mask or the halftone mask; And developing the plurality of lens forming guide parts by developing the photosensitive film. 12. The method of claim 11, The forming of the electrode layer may include forming the electrode layer on the front surface of the insulating substrate to cover the lens forming guide part; And removing the electrode layer between the lens forming guide parts by patterning the electrode layer. 12. The method of claim 11, And the lens forming guide part has a cross section of any one of a triangle, a semicircle, and a trapezoidal shape.

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