KR20070097815A - Image display device and driving method thereof - Google Patents

Abstract

An image display device and a driving method thereof are provided to perform conversion between 2D and 3D image display modes and to reduce manufacturing costs by inducing a second panel unit using an electro-wetting phenomenon. A first panel unit(32) displays a 2D(Dimensional) image. A second panel unit(30) is laminated on the first panel unit and includes electrodes for controlling movements of a transparent solution and plural cells filled with the transparent solution and a light shielding solution. A 2D image display mode is implemented by moving the light shielding solution to a side of all cells by the transparent solution whose movement is controlled by the electrodes. A 3D image display mode is implemented by moving the light shielding solution of the cell to a side of the cell.

Description

Image Display Device and Driving Method Thereof}

1 is a view for explaining a three-dimensional image display device using a parallax barrier.

2A and 2B are diagrams for explaining an image display apparatus in which conventional two-dimensional and three-dimensional image display modes can be switched.

3 schematically shows an image display device according to the present invention;

FIG. 4 schematically shows a second panel portion of the image display device shown in FIG.

5 is a diagram for describing a method of implementing a two-dimensional image display mode by a second panel unit according to the present invention;

6A and 6B are views for explaining a method of implementing a 3D image display mode by the second panel unit according to the present invention;

FIG. 7 is a diagram for describing a method of driving a first electrode for each unit cell; FIG.

8 is a view for explaining a second panel unit according to another embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

10, 26, 76: parallax barrier 22: first liquid crystal panel

20: second liquid crystal panel 24, 34: black matrix

32: first panel portion 30: second panel portion

41: lower substrate 44, 54: electrode

36 cell 38 partition wall

51: upper substrate 46, 56, 88: insulating film

48: oil layer 58: aqueous solution layer

P1: opening area P2: non-opening area

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display apparatus, and in particular, to provide an image display apparatus and a method of driving the same, which can easily switch between two-dimensional and three-dimensional image display modes, reduce manufacturing costs, and simplify optical design. have.

Recently, information and communication technology has been advanced in the form of implementing new next-generation services through the development of network, terminal, information processing, and component and device related technologies. With the development of such information and communication technology, the display field has been actively developed for the image display device capable of displaying an image in three dimensions.

In general, an image display apparatus displaying a 3D stereoscopic image displays a 3D image by using perspective appearing when a minute difference of an image perceived by both eyes is synthesized in the brain. The stereoscopic image display apparatus is largely divided into an autostereoscopic method and a binocular method. The former requires an observer to view stereoscopic images without any assistive devices, while the latter requires ancillary devices such as polarized glasses to enjoy stereoscopic images.

The binocular method, that is, the method using binocular disparity, makes a subtle difference between an image incident on the left eye and an image incident on the right eye, so that the brain recognizes the difference as a 3D stereoscopic image. Methods of implementing such a binocular method include a method using a parallax barrier and a lenticular lens.

1 illustrates a conventional image display apparatus using a parallax barrier to implement a 3D stereoscopic image.

Referring to FIG. 1, a conventional three-dimensional stereoscopic image display device uses a parallax barrier 10 to selectively block light irradiated on a three-dimensional image display surface 12 so that an image perceived by the left eye of the observer 14 and The difference in the image perceived by the right eye occurs, and the brain of the observer 14 perceives the 3D stereoscopic image.

2A and 2B illustrate a conventional image display apparatus capable of switching between a two-dimensional image and a three-dimensional image display mode by using the parallax barrier described above in FIG. 1.

2A and 2B, a conventional image display apparatus capable of switching between a two-dimensional image and a three-dimensional image display mode selects a first liquid crystal panel 22 displaying an image and a two-dimensional and three-dimensional image display mode. A second liquid crystal panel 20 that can be provided.

The first liquid crystal panel 22 displays an image by adjusting the light transmittance of the liquid crystal having dielectric anisotropy using an electric field. The first liquid crystal panel 22 includes a color filter substrate 22b and a thin film transistor substrate 22a bonded to each other with a liquid crystal interposed therebetween.

The color filter substrate 22b includes a black matrix 24, color filters, and the like, which are sequentially formed on the upper glass substrate. The black matrix 24 is formed in a matrix form on the upper glass substrate. This black matrix 24 divides an area of the upper glass substrate into a plurality of cell areas where a color filter is to be formed, and prevents light interference and external light reflection between adjacent cells.

The second liquid crystal panel 20 turns the parallax barrier 26 on / off by adjusting the light transmittance of the liquid crystal having dielectric anisotropy using an electric field. The second liquid crystal panel 20 includes an upper substrate and a lower substrate bonded to each other with a liquid crystal interposed therebetween.

As shown in FIG. 2A, since the parallax barrier is not activated when the second liquid crystal panel 20 is in an off state, the second liquid crystal panel 20 displays an image of the first liquid crystal panel 22 in two dimensions.

On the other hand, as shown in FIG. 2B, when an electric field is formed in a specific area of the second liquid crystal panel 20, since the parallax barrier 26 is activated, the second liquid crystal panel 20 is an image of the first liquid crystal panel 22. Display in three dimensions.

However, the method of activating the parallax barrier 26 using the second liquid crystal panel 20 may facilitate switching of the image display mode between two-dimensional and three-dimensional, but the liquid crystal for forming the parallax barrier 26 Due to the expensive manufacturing cost of the panel, there is a disadvantage in that the manufacturing cost is large. In addition, the method of activating the parallax barrier 26 using the second liquid crystal panel 20 takes into account a parallax barrier in consideration of a phase delay of light passing through the liquid crystal included in the first and second liquid crystal panels 22 and 20. (26) has to be activated, so the optical design has a complex disadvantage.

Accordingly, it is an object of the present invention to provide an image display apparatus and a driving method thereof that can easily switch between two-dimensional and three-dimensional image display modes, reduce manufacturing costs, and simplify optical design.

In order to achieve the above object, an image display apparatus according to the present invention includes a first panel portion for displaying a two-dimensional image; A second panel portion stacked on the first panel portion, the second panel portion including a plurality of cells containing the transparent liquid and the light shielding liquid and electrodes for controlling the movement of the transparent liquid, wherein the movement is controlled by the electrodes; The transparent liquid causes the shielding liquid to be behaved to one side of all the cells to implement a two-dimensional image display mode, and the light shielding liquid of some of the cells is behaved to one side of the cell, thereby making a three-dimensional image display mode. Implement

The transparent liquid includes any one of water and an aqueous electrolyte solution.

The light shield liquid comprises black oil.

The second panel portion and a lower substrate; A first electrode formed on the lower substrate; An upper substrate facing the lower substrate; A second electrode formed on the upper substrate; The plurality of cells further includes partition walls for partitioning between the lower substrate and the upper substrate.

The partition wall is formed to correspond to the non-opening area of the first panel portion.

The non-opening region includes a black matrix region that partitions pixel cells of the first panel portion.

The first surface of the partition wall is formed to be in close contact with the first electrode adjacent to the first surface, and the second surface of the partition wall facing the first surface of the partition wall may include the first electrode adjacent to the second surface. It is formed spaced apart.

One side surface of the cell where the light shielding liquid whose behavior is controlled by the transparent liquid is located is a space between the second surface of the partition wall and the first electrode adjacent to the second surface.

The space between the second surface of the partition wall and the first electrode adjacent to the second surface corresponds to a black matrix area partitioning the pixel cells of the first panel portion.

The first electrode and the second electrode are formed of a transparent conductive material including indium tin oxide, a conductive polymer, and carbon nanotubes.

Specific gravity of the transparent liquid may be less than specific gravity of the light shielding liquid.

If the specific gravity of the transparent liquid is less than the specific gravity of the light shielding liquid, the market value according to the present invention further includes a hydrophobic insulating film covering the first electrodes.

If the specific gravity of the transparent liquid is less than the specific gravity of the light shielding liquid, the image display apparatus according to the present invention further includes a hydrophilic insulating film covering the second electrodes.

If the specific gravity of the transparent liquid is less than the specific gravity of the light shielding liquid, the image display apparatus according to the present invention may include a space between the second surface of the partition wall and the first electrode adjacent to the second surface for each of the plurality of cells. A hydrophilic insulating layer may be further provided on the corresponding lower substrate.

The specific gravity of the transparent liquid may be greater than the specific gravity of the light shielding liquid.

When the specific gravity of the transparent liquid is greater than the specific gravity of the light shielding liquid, the image display apparatus according to the present invention further includes a hydrophilic insulating layer covering the first electrodes.

When the specific gravity of the transparent liquid is greater than the specific gravity of the light shielding liquid, the image display apparatus according to the present invention further includes a hydrophobic insulating film covering the second electrodes.

If the specific gravity of the transparent liquid is greater than the specific gravity of the light shielding liquid, the image display apparatus according to the present invention corresponds to a space between the second surface of the partition wall and the first electrode adjacent to the second surface for each of the plurality of cells. A hydrophilic insulating film may be further provided on the second electrode.

The height of the partition wall may be the same as the cell gap between the upper substrate and the lower substrate.

The height of the partition wall may be formed to be greater than or equal to the height of the light shielding liquid that behaves toward one side of the cell by the transparent liquid.

The first panel unit may include any one of a liquid crystal panel, a plasma display panel, and an organic light emitting display panel.

The first electrode may be driven for each of the plurality of cells by a switching element formed for each of the plurality of cells.

A first panel portion for displaying a two-dimensional image; A method of driving an image display apparatus including a second panel portion stacked on the first panel portion and including a plurality of cells in which a transparent liquid and a light shielding liquid are contained and electrodes for controlling movement of the transparent liquid. Displaying an image on the panel portion; A voltage is applied to the electrodes of all the cells to cause the shielding liquid to be moved to one side of all the cells by the transparent liquid to implement a two-dimensional image display mode, or to apply a voltage to the electrodes of some of the cells. Activating the parallax barrier by causing the light shielding solution of some of the cells to be bent to one side of the cell to implement a three-dimensional image display mode.

Other objects and advantages of the present invention other than the above object will be apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 3 to 8.

3 is a view schematically showing an image display device according to an embodiment of the present invention.

Referring to FIG. 3, an image display apparatus according to an exemplary embodiment of the present invention includes a first panel portion 32 for displaying a two-dimensional image and a second panel portion 30 for selecting a two-dimensional or three-dimensional image display mode. ).

The first panel 32 can display an image by adjusting the light transmittance of the liquid crystal having dielectric anisotropy using an electric field. The first panel portion 32 includes a color filter substrate 32b and a thin film transistor substrate 32a bonded to each other with a liquid crystal interposed therebetween.

The color filter substrate 32b includes a black matrix 34 sequentially formed on the upper glass substrate, a color filter, and a common electrode. The black matrix 34 is formed in a matrix form on the upper glass substrate. This black matrix 34 divides the area of the upper glass substrate into a plurality of cell areas where a color filter is to be formed, and prevents light interference and external light reflection between adjacent cells. The color filter is formed to be divided into red, green, and blue in the cell region divided by the black matrix 34 to transmit red, green, and blue light, respectively. The common electrode is a transparent conductive layer that is entirely coated on the color filter and supplies a common voltage Vcom which is a reference when driving the liquid crystal. In addition, an overcoat layer (not shown) may be further formed between the color filter and the common electrode to planarize the color filter.

The thin film transistor substrate 32a includes a thin film transistor and a pixel electrode formed in each cell region defined by the intersection of the gate line and the data line in the lower glass substrate. The thin film transistor supplies the data signal from the data line to the pixel electrode in response to the gate signal from the gate line. The pixel electrode formed of the transparent conductive layer supplies a data signal from the thin film transistor to drive the liquid crystal.

The liquid crystal having dielectric anisotropy rotates according to the electric field formed by the data signal of the pixel electrode and the common voltage Vcom of the common electrode to adjust the light transmittance so that gray scale is realized.

The second panel unit 30 turns on / off the parallax barrier by using an electrowetting phenomenon, which is a phenomenon in which wetting is changed by an externally applied electric signal. The image display device of the present invention turns on / off the parallax barrier in the second panel portion 30 to make the two-dimensional image displayed on the first panel portion 32 appear in three dimensions or the two-dimensional image intact.

4 to 6A show the second panel portion 30 of the image display device according to the present invention.

4 to 6A, the second panel unit 30 according to the embodiment of the present invention may include an upper array substrate 30b and a lower array substrate 30a that are bonded to each other, and two array substrates 30a, A first fluid 58 and a second fluid 48 injected between 30b).

The lower array substrate 30a may include the first electrodes 44 formed on the lower substrate 41, the first insulating layer 46 formed on the lower substrate 41 to cover the first electrodes 44. And a partition wall 38 formed on the first insulating film 46 to partition the plurality of cells 36.

The upper array substrate 30b is formed on the second electrode 54 formed on the upper substrate 51 facing the lower substrate 41 and on the upper substrate 51 to cover the second electrode 54. The second insulating film 56 is formed.

The first fluid 58 and the second fluid 48 are formed of fluids having different specific gravity so as to form a boundary without mixing with each other. In addition, either one of the first fluid 58 and the second fluid 48 is a polar fluid and the other is a nonpolar fluid. As the polar fluid, an aqueous solution is used, and as the nonpolar fluid, an organic solvent such as silicone oil, mineral oil, carbon tetrachloride (CCl ₄ ), and the like are used.

Either one of the first fluid 58 and the second fluid 48 must be a clear liquid and the other must be a light shielding liquid to implement a parallax barrier.

In the drawings of the present invention, a transparent aqueous solution as the first fluid 58 and an oil having a specific gravity greater than the transparent aqueous solution as the second fluid 48 are illustrated as an example. Although the specific gravity of the oil layer 48 is greater than the specific gravity of the transparent aqueous solution layer 58 in the drawing, the specific gravity of the oil layer 48 may be smaller than the specific gravity of the transparent aqueous solution layer 58.

The oil layer 48 comprises a black dye for light blocking and is hydrophobic.

The transparent aqueous solution layer 58 forms a boundary without mixing with the black oil layer 48. The transparent aqueous solution layer 58 is mainly made of water, and may further include an electrolyte material such as NaCl in addition to water. In addition, the movement of the transparent aqueous solution layer 58 is controlled by the first and second electrodes 44 and 54 to determine the presence or absence of parallax barrier formation. Therefore, the transparent aqueous solution layer 58 further includes an electrolyte material other than water, so that control by the electrodes 44 and 54 may be easier.

The first and second electrodes 44 and 54 control the movement of the transparent aqueous solution layer 58.

The partition wall 38 is formed to correspond to the non-opening area P2 of the first panel portion 32 shown in FIG. 3 and is formed of photoresist (PR) to partition the plurality of cells 36. do. In addition, the oil layer 48 and the aqueous solution layer 58 are filled in the plurality of cells 36 provided by the partition wall 38. The height of the partition wall 38 is controlled to be controlled by the transparent aqueous solution layer 58 is formed above the height of the oil layer 48 driven to the A region of one side of the cell 36. In addition, the partition wall 38 may be formed at the same height as the cell gap between the upper array substrate 30b and the lower array substrate 30b to maintain the cell gap. In addition, the partition wall 38 is formed in the non-opening region P2 where no pixel is displayed, and the first surface 38a, which is one side of the partition wall 38, is formed to be in close contact with the first electrode 44 adjacent thereto. The second surface 38b of the partition wall facing the first surface 38a is formed to be spaced apart from the first electrode 44 adjacent thereto by a predetermined distance. The space between the first electrode 44 of each cell 36 formed as described above and the second surface 38b of the partition wall is controlled by the transparent aqueous solution layer 58 so that the oil layer 48 may be driven. It becomes an area.

The first electrode 44 is covered with the first insulating film 46, and the surface of the first insulating film 46 is hydrophobic or hydrophobic by being covered with a further formed first hydrophobic layer. The first electrode 44 is formed of a transparent conductive material such as indium tin oxide (ITO), a conductive polymer, or carbon nanotube (CNT).

Parylene, SiO _2, or the like may be used as the first insulating layer 46. When the first hydrophobic layer is further formed, the first hydrophobic layer may be used as fluoropolymer, silicone, or the like.

The second electrode 54 is formed of a transparent conductive material such as indium tin oxide, a conductive polymer, or a carbon nanotube, and the second electrode 54 is covered with the second insulating film 56. The surface of the second insulating film 56 is hydrophilic.

The characteristics of the first insulating film 46 and the second insulating film 56 are that the transparent aqueous solution layer 58 and the oil layer 48 are in contact with the electrodes 46 and 56 before voltage is applied to the electrodes 44 and 54. Is associated with the

That is, as shown in the drawing, when the specific gravity of the transparent aqueous solution layer 58 is smaller than the specific gravity of the oil layer 48, since the layer contacting the first insulating film 46 is the oil layer 48, the characteristics of the oil layer 48 As a result, the first insulating film 46 is hydrophobic. In addition, since the layer in contact with the second insulating film 56 is the transparent aqueous solution layer 58, the second insulating film 56 is hydrophilic.

On the other hand, although not shown, when the specific gravity of the transparent aqueous solution layer 58 is greater than the specific gravity of the oil layer 48, the layer in contact with the first insulating film 46 is the transparent aqueous solution layer 58 characteristics of the transparent aqueous solution layer 58 Accordingly, the first insulating film 46 is hydrophilic. In addition, since the layer in contact with the second insulating film 56 is the oil layer 48, the second insulating film 56 is hydrophobic.

A driving method of the second panel unit using the electrowetting phenomenon will be described with reference to FIGS. 5 to 6B.

5 is a diagram for describing a method of implementing a two-dimensional image display mode by the second panel unit.

Referring to FIG. 5, when power having different polarities is applied to the first electrode 44 and the second electrode 54 of the entire second panel unit cell, the transparent aqueous solution layer 58 of the entire cell is polarized and powered. The first electrode 44 and the second electrode 54 are collected to be adjacent to each other. Accordingly, the oil layer 48 includes the non-opening region P2 included in the cell by the transparent aqueous solution layer 58 gathered into a region adjacent to the first electrode 44 and the second electrode 54 after power is applied. To one side of area A. At this time, the non-opening region P2 is a portion corresponding to the black matrix 34 of the first panel portion 32 shown in FIG. 3. Therefore, the second panel portion to which the power is applied to the entire plurality of cells displays the two-dimensional image displayed by the first panel portion 32 as it is.

6A and 6B are diagrams for describing a method of implementing the 3D image display mode by the second panel unit.

6A and 6B, when power of different polarities is applied to the first electrode 44 and the second electrode 54 included in any cell 36b of the second panel unit, power is applied. The transparent aqueous solution layer 58 of the cell 36b is collected while being polarized and adjacent to the first and second electrodes 44 and 54 to which power is applied. The transparent aqueous solution layer 58 gathered to adjoin the first and second electrodes 44 and 54 causes the oil layer 48 in the cell 36b to which power is applied to the A region.

On the other hand, the transparent aqueous solution layer 58 and the oil layer 48 of the cell 36a to which the power is not applied to the first electrode 44 depend on the characteristics of the insulating layer in contact with the transparent aqueous solution layer 58 and the oil layer 48. Spreads. That is, the hydrophobic oil layer 48 of the cell 36a to which power is not applied can be spread on the first insulating film 46 by the surface tension of the hydrophobic first insulating film 46, and the power is not applied. The hydrophilic transparent aqueous solution layer 58 of the cell 36a can be spread on the second insulating film 56 by the surface tension of the hydrophilic second insulating film 56.

Although not shown, when the specific gravity of the transparent aqueous solution layer 58 is greater than the specific gravity of the black oil layer 48, the first insulating layer 46 is hydrophilic and the second insulating layer 56 is hydrophobic. Accordingly, the hydrophobic oil layer 48 of the cell 36a in which the power is not applied to the first electrode 44 may spread on the second insulating film 26 by the surface tension of the hydrophobic second insulating film 56. The hydrophilic transparent aqueous solution layer 58 of the cell 36a to which the power is not applied to the first electrode 44 is formed on the first insulating film 46 by the surface tension of the hydrophilic first insulating film 46. It can spread.

As described above, the transparent aqueous solution layer 58 and the oil layer 48 of the cell 36a to which the power is not applied to the first electrode 44 are spread over the insulating films 46 and 56, thereby forming the oil layer 48. ) Spreads through the opening region P1 of the cell 36a to which power is not applied. Since the oil layer 48 includes black dye, the oil layer 48 spreading in the opening region P1 selectively displays a two-dimensional image implemented in the first panel portion 32 as shown in FIG. 6B. It is possible to form a parallax barrier 76 to block. The parallax barrier 76 formed as described above allows the observer to recognize the two-dimensional image implemented in the first panel unit 32 as a three-dimensional image.

The first electrode 44 may be driven for each unit cell.

FIG. 7 is a diagram for describing a method of driving the first electrode 44 for each unit cell.

Referring to FIG. 7, in order to drive the first electrode 44 for each unit cell, the second panel unit according to the present invention may be formed in an active matrix type in which switching elements are formed in each unit cell.

As the switching device, a thin film transistor (TFT) may be used.

The second panel portion of the present invention includes a data line DL and a gate line GL that intersect with each unit cell, and a thin film transistor TFT for driving the first electrode 44 at an intersection thereof. One electrode 44 may be driven for each unit cell.

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

Referring to FIG. 8, the image display device according to another exemplary embodiment of the present invention may further include a third insulating film (3) in order to more stably spread the oil layer 48 driven into the A region by applying power. 88).

The third insulating film 88 of the image display device according to another exemplary embodiment of the present invention may be formed between the first electrode 44 of the plurality of cells 36 and the second surface 38b of the partition wall, that is, the oil layer 48. The molybdenum is formed on the lower substrate 11 corresponding to the area A, which is a space.

The first insulating film 46 of the image display apparatus according to another exemplary embodiment of the present invention may be formed only in a portion where the first electrode 44 of each cell 36 is formed as the third insulating film 88 is formed. 44).

In addition, the third insulating film 88 according to another embodiment of the present invention is formed to exhibit hydrophilicity. The hydrophilic third insulating film 88 helps to easily spread to the opening region P1 when the oil layer 48 driven to the A region by the application of the power is released.

The movements of the transparent aqueous solution layer 58 and the oil layer 48 according to the first to third insulating layers 46, 56, and 88 will be described in detail as follows.

First, the transparent aqueous solution layer 58 in the cell 36b to which power is applied to the first and second electrodes 44 and 54 is collected to be adjacent to the first and second electrodes 44 and 54 while being polarized. The color oil layer 48 is driven into the A region by the aqueous solution layer 58.

Then, when the power supply of the first electrode 44 of any unit cell is released to form a differential barrier, the transparent aqueous solution layer 58 in the cell 36b to which the power is not applied to the first electrode 44 is formed. The surface tension of the second and third insulating films 56 and 88 exhibiting hydrophilicity tends to spread on the second and third insulating films 56 and 88. The oil layer 48 in the cell 36b to which the power is not applied to the first electrode 44 is to be spread on the first insulating film 46 by the surface tension of the hydrophobic first insulating film 46. . As a result, the hydrophobic oil layer 48 gathered in the A region can be more easily spread to the opening region P1 due to the hydrophilic transparent aqueous solution layer 58 that is about to be spread to the A region by the hydrophilic third insulating film 88.

Although not shown in the drawing, when the specific gravity of the oil layer 48 is greater than the specific gravity of the transparent aqueous solution layer 58, the third insulating film 88 is formed on the second electrode 54 corresponding to the A region and is hydrophilic. By floating, it serves as described above in FIG.

The first panel portion of the present invention described above may be applied to any known image display panel that displays a two-dimensional image in addition to the liquid crystal display panel described above. Examples of known display panels displaying two-dimensional images include plasma display panels and organic electroluminescent display panels.

As described above, the image display device according to the present invention introduces a second panel portion using an electrowetting phenomenon to form a parallax barrier. The second panel portion using this electrowetting phenomenon can be formed using a material having a lower cost than that of the liquid crystal display panel. Accordingly, the image display device according to the present invention can easily switch between two-dimensional and three-dimensional image display modes and reduce manufacturing costs by introducing the second panel portion using the electrowetting phenomenon. In addition, since the second panel part using the electrowetting phenomenon does not include a liquid crystal that needs to consider phase delay, an optical design for forming a parallax barrier may be simplified.

As described above, the image display device according to the present invention introduces a second panel portion using an electrowetting phenomenon to form a parallax barrier. The second panel portion using this electrowetting phenomenon can be formed using a material having a lower cost than that of the liquid crystal display panel. Accordingly, the image display device according to the present invention can easily switch between two-dimensional and three-dimensional image display modes and reduce manufacturing costs by introducing the second panel portion using the electrowetting phenomenon. In addition, since the second panel part using the electrowetting phenomenon does not include a liquid crystal that needs to consider phase delay, an optical design for forming a parallax barrier may be simplified.

In addition, the image display apparatus according to the present invention can contribute to the display market requiring various contents development by enabling the image conversion between two-dimensional and three-dimensional by using the electrowetting phenomenon.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (23)

A first panel portion for displaying a two-dimensional image; A second panel portion stacked on the first panel portion, the second panel portion including a plurality of cells containing a transparent liquid and a light shielding liquid and electrodes for controlling the movement of the transparent liquid, The blocking liquid is moved to one side of all the cells by the transparent liquid whose movement is controlled by the electrodes, thereby implementing a two-dimensional image display mode, and the light shielding liquid of some of the cells to one side of the cell. An image display apparatus characterized by embodying a three-dimensional image display mode by operating. The method of claim 1, The transparent liquid image display device, characterized in that it comprises any one of water and an aqueous electrolyte solution. The method of claim 2, And the light blocking solution comprises black oil. The method of claim 3, wherein The second panel portion A lower substrate; A first electrode formed on the lower substrate; An upper substrate facing the lower substrate; A second electrode formed on the upper substrate; And a plurality of partition walls for partitioning the plurality of cells between the lower substrate and the upper substrate. The method of claim 4, wherein The partition wall And the non-opening area of the first panel portion. The method of claim 5, The non-opening area is And a black matrix area partitioning pixel cells of the first panel portion. The method of claim 4, wherein The first surface of the partition wall is formed to be in close contact with the first electrode adjacent to the first surface, and the second surface of the partition wall facing the first surface of the partition wall may include the first electrode adjacent to the second surface. An image display device, characterized in that formed spaced apart. The method of claim 7, wherein One side of the cell in which the light shielding liquid whose behavior is controlled by the transparent liquid is located is And a space between the second surface of the partition wall and the first electrode adjacent to the second surface. The method of claim 8, The space between the second surface of the partition and the first electrode adjacent to the second surface is And a black matrix area partitioning pixel cells of the first panel unit. The method of claim 4, wherein And the first and second electrodes are formed of a transparent conductive material including indium tin oxide, a conductive polymer, and carbon nanotubes. The method of claim 7, wherein And a specific gravity of the transparent liquid is smaller than that of the light shielding liquid. The method of claim 11, And a hydrophobic insulating film covering the first electrodes. The method of claim 11, And a hydrophilic insulating film covering the second electrodes. The method of claim 12, Every said plurality of cells And a hydrophilic insulating film formed on the lower substrate corresponding to the space between the second surface of the partition and the first electrode adjacent to the second surface. The method of claim 7, wherein And specific gravity of the transparent liquid is greater than specific gravity of the light shielding liquid. The method of claim 15, And a hydrophilic insulating film covering the first electrodes. The method of claim 15, And a hydrophobic insulating film covering the second electrodes. The method of claim 17, Every said plurality of cells And a hydrophilic insulating film formed on the second electrode corresponding to the space between the second surface of the partition and the first electrode adjacent to the second surface. The method of claim 4, wherein The height of the bulkhead And a cell gap between the upper substrate and the lower substrate. The method of claim 4, wherein The height of the bulkhead And the height of the light shielding liquid behaving to one side of the cell by the transparent liquid. The method of claim 1, The first panel unit An image display apparatus comprising any one of a liquid crystal panel, a plasma display panel, and an organic electroluminescent display panel. The method of claim 4, wherein The first electrode is And the plurality of cells are driven for each of the plurality of cells by a switching element formed for each of the plurality of cells. A first panel portion for displaying a two-dimensional image; An image display apparatus comprising a second panel portion stacked on the first panel portion, the second panel portion including a plurality of cells containing a transparent liquid and a light shielding liquid and electrodes for controlling the movement of the transparent liquid. Displaying an image on the first panel portion; A voltage is applied to the electrodes of all the cells to cause the shielding liquid to be moved to one side of all the cells by the transparent liquid to implement a two-dimensional image display mode, or to apply a voltage to the electrodes of some of the cells. And driving the parallax barrier by causing the light shielding liquid of some of the cells to move to one side of the cell to implement a three-dimensional image display mode.

Images