KR100728114B1 - Barrier device and autostereoscopic display using the same - Google Patents

Abstract

The stereoscopic image display device includes a barrier in which the shape of the barrier can be changed according to a user's selection.

In detail, the 3D image display device includes a display panel, a barrier, and a barrier driver. The barrier is disposed to face the display panel and includes a first substrate on which a plurality of first electrodes and a plurality of second electrodes are formed, a second substrate on which a plurality of third electrodes and a plurality of fourth electrodes are formed, and a first substrate and a second substrate. The liquid crystal layer of normally black state enclosed between board | substrates is included. The first electrode is formed on the first substrate in the first direction, and the second electrode is formed between each of the adjacent first electrodes. The third electrode is formed on the second substrate in a second direction perpendicular to the first direction, and the fourth electrode is formed between each of the adjacent third electrodes. The barrier driver applies a first voltage, a second voltage, a third voltage, and a fourth voltage to the first electrode, the second electrode, the third electrode, and the fourth electrode, respectively, to drive the barrier. Here, some of the first to fourth voltages may be reference voltages, and others may be liquid crystal driving voltages.

Stereoscopic Image, Binocular Parallax, Barrier, Zigzag, Stripe, Normally Black

Description

Barrier device and stereoscopic display device using the same {Barrier device and autostereoscopic display using the same}

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

2 is a view showing a cross-sectional structure of a barrier according to a first embodiment of the present invention.

3A is a view illustrating in detail the structure of electrodes formed on a first substrate.

3B is a view showing in detail the structure of the electrodes formed on the second substrate.

4A and 4B illustrate a voltage applied to each electrode of the barrier according to the first embodiment of the present invention.

4C is a diagram illustrating an example in which a barrier is driven in a stripe form according to the first embodiment of the present invention.

5A and 5B illustrate a voltage applied to each electrode of a barrier according to a first embodiment of the present invention.

5C schematically illustrates an example in which a barrier is driven in a zigzag form according to the first embodiment of the present invention.

6 is a diagram illustrating an example in which a barrier is driven in a stripe form according to a second embodiment of the present invention.

7 is a view schematically showing an example in which the barrier is driven in a zigzag form according to the second embodiment of the present invention.

The present invention relates to a barrier device used for displaying a stereoscopic image using binocular disparity and a stereoscopic image display apparatus using the same, and more particularly, to a barrier apparatus capable of changing the shape of a barrier and a stereoscopic image display apparatus using the same.

In general, there are physiological and empirical factors in which a person feels a three-dimensional effect, and in three-dimensional image display technology, a three-dimensional effect of an object is generally determined by using a binocular parallax, which is the biggest factor that recognizes a three-dimensional effect at a short distance. Will feel. There are two methods of using binocular disparity such as a method of wearing glasses and an autostereoscopy without wearing glasses.

In the non-glasses without glasses, a stereoscopic effect is produced by separating a left eye and a right eye image using a barrier.

An opaque region and a transparent region are repeatedly arranged in the barrier, and a pixel corresponding to the right eye and a pixel corresponding to the left eye are formed in the image panel.

The observer sees an image displayed on the image panel through the transparent region of the barrier, and the left and right eyes of the observer see different regions of the image panel even though they pass through the same transparent region.

The barriers include a stripe shape and a zigzag shape in which opaque areas and transparent areas are arranged. In the barrier-type barrier, an opaque region and a transparent region extending in one direction are alternately formed. Such a stripe-type barrier has a problem in that the horizontal resolution is only about half of the vertical resolution, and there is a problem in that a vertical stripe occurs in the display image, thereby causing a burden on the eyes. In recent years, two types of portraits have a long vertical orientation, and landscapes have a long horizontal orientation in order to allow users to play games, watch TV, video, etc., or to view a wide screen when a digital camera is built in. Display devices that can be viewed by rotating the screen vertically have been developed so that the screen can be viewed with the branches. However, the barrier as shown in FIG. 2A is inevitably made to suit either a portrait form or a landscape form, and when a barrier conforms to the portrait form, a three-dimensional image cannot be viewed on a landscape form.

In order to solve this problem, a barrier in which an opaque region and a transparent region are formed in a zigzag form has been developed.

The zigzag barrier has a problem that the horizontal resolution is improved but the viewing angle is narrowed. In addition, it can be used when the display screen is portrait or landscape, but the barrier display is fixed so that when the display screen is changed to landscape, the position of the left and right pixels of the display panel, and the opacity of the barrier Depending on the location of the region and the transparent region, it may not be possible to properly display a stereoscopic image.

This problem is an obstacle to the generalization of the stereoscopic image display device. Therefore, the development of a barrier capable of expressing various types of stereoscopic images is required.

An object of the present invention is to provide a barrier device and a stereoscopic image display device which can change the shape of a barrier according to a user's selection.

An object of the present invention is to provide a stereoscopic image display device which can prevent light from being transmitted to an area between an electrode and an electrode of a barrier including a plurality of electrodes.

Another technical problem of the present invention is to provide a barrier device including a plurality of electrodes and capable of preventing light from being transmitted to the region between each electrode and the electrodes.

In accordance with one aspect of the present invention for solving the technical problem, the stereoscopic image display device,

A display panel configured to display an image corresponding to an input image signal;

A first substrate, a plurality of first electrodes formed in a first direction on the first substrate, a plurality of second electrodes formed between the first electrodes adjacent to the first substrate, and a second substrate facing the first substrate A plurality of third electrodes formed on the second substrate and formed in a second direction perpendicular to the first direction, a plurality of fourth electrodes formed between each of the third electrodes adjacent to the second substrate, and the first substrate; A barrier including a liquid crystal layer in a normally black state disposed between the second substrates and corresponding to the display panel; And

A barrier driver configured to apply a first voltage, a second voltage, a third voltage, and a fourth voltage to the first electrode, the second electrode, the third electrode, and the fourth electrode, respectively, to drive the barrier; do.

Some of the first to fourth voltages may be reference voltages, and others may be liquid crystal driving voltages.

The barrier further includes a first connection electrode connected to one end of the plurality of first electrodes and a second connection electrode connected to one end of the plurality of second electrodes, and the barrier driver includes the first and second electrodes. The first voltage and the second voltage may be applied to each of the first electrode and the second electrode through a connection electrode.

The barrier further includes a third connection electrode connected to one end of the plurality of third electrodes and a fourth connection electrode connected to one end of the plurality of fourth electrodes, and the barrier driver includes the third and fourth electrodes. The third voltage and the fourth voltage may be applied to each of the third electrode and the fourth electrode through a connection electrode.

A barrier device according to another aspect of the present invention is a barrier device attached to a stereoscopic image display panel for displaying a stereoscopic image using binocular parallax,

 A normally black liquid crystal encapsulated between a first substrate on which a plurality of first electrodes and a plurality of second electrodes are formed, a second substrate on which a plurality of third electrodes and a plurality of fourth electrodes are formed, and the first substrate and the second substrate. A barrier including a layer and a barrier driver configured to apply a first driving voltage to some of the first electrode, the second electrode, the third electrode, and the fourth electrode, and apply a second driving voltage to the other electrode. Include.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

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

The stereoscopic image display device includes a controller 100, a barrier driver 200, a barrier 300, a display panel driver 400, and a display panel 500.

The controller 100 receives the image signals R, G, and B data, the horizontal synchronous signal H_sync, and the vertical synchronous signal V_sync to generate a barrier control signal and a display panel control signal to generate the barrier driver 200 and the display. The panel driver 400 is transferred to each.

The display panel driver 400 receives the display panel control signal from the controller 100 to drive the display panel 500. In detail, the display panel driver 400 drives the display panel 500 so that the input image signals R, G, and B data can be normally displayed on the display panel 500. In general, the display panel 500 may use a panel that displays an image. In detail, the display panel 500 is a display panel that can separate and display a left eye image and a right eye image in response to input stereoscopic image signals R, G, and B data. Display panels and the like can be used.

The barrier driver 200 receives the control signal from the controller 100 to drive the barrier 300. In detail, the barrier driver 200 drives the barrier 300 such that the barrier 300 is striped or zigzag based on the display form of the barrier 300 determined by the controller 100.

The barrier 300 has an electrode structure capable of operating in a stripe shape or a zigzag shape, and the structure of the barrier 300 will be described with reference to FIGS. 2, 3A, and 3B.

2 is a cross-sectional view of the barrier 300 according to the first embodiment of the present invention, FIG. 3A is a view showing the structure of the electrodes formed on the first substrate 301 in detail, and FIG. 3B is a second view. The structure of the electrodes formed on the substrate 302 is shown in detail.

As shown in FIG. 2, the barrier 300 is normally black disposed between the first substrate 301, the second substrate 302, and the first substrate 301 and the second substrate 302. ) Liquid crystal 303 is included.

In the present exemplary embodiment, the first and second substrates 301 and 302 may be rectangular glass substrates having a pair of short sides and long sides.

On each surface of the first substrate 301 and the second substrate 302 facing each other, electrodes 304 for driving the liquid crystal 303 disposed between the first substrate 301 and the second substrate 302. 309) are formed. The electrodes 304 to 309 may be made of a transparent material such as indium tin oxide (ITO). Hereinafter, the electrodes will be described in detail.

As shown in FIGS. 2 and 3A, the plurality of first electrodes 304 formed on the first substrate 301 may correspond to a short side of the first direction (first substrate 301) of the first substrate 301. Direction, along the X-axis direction of FIG. 3A). The first electrodes 304 are formed in a stripe pattern and are arranged on the first substrate 301 with a predetermined gap therebetween. In addition, the first connection electrode 305 extends in the second direction (Y-axis direction in FIG. 3A) perpendicular to the first direction on the first substrate 301, and is connected to one ends of the first electrodes 304. . The first electrodes 304 and the first connection electrode 305 form a first electrode set 1.

Similarly, a second electrode set 2 formed of the second electrodes 306 and the second connection electrode 307 is further formed on the first substrate 301. In detail, the plurality of second electrodes 306 formed on the first substrate 301 are disposed long along the first direction (the X-axis direction of FIG. 3A) of the first substrate 301. The second electrodes 306 are formed in a stripe pattern and are arranged between the first electrodes 304, respectively. In addition, the second connection electrode 307 extends in the second direction (Y-axis direction in FIG. 3A) perpendicular to the first direction on the first substrate 301, and is connected to one ends of the second electrodes 306. .

The first electrode set Set 1 and the second electrode set Set 2 are formed to substantially cover the entire area corresponding to the display area of the display panel 500, and the first and second electrodes 304 and 2 are adjacent to each other. Although there is a predetermined interval between the 306 but the liquid crystal 303 is normally black, the predetermined region between the adjacent first electrode 304 and the second electrode 306 is always an opaque region. Therefore, light in the transparent region is blocked from leaking at a predetermined interval between the adjacent first electrode 304 and the second electrode 306.

Similarly, as shown in FIGS. 2 and 3B, a third electrode set Set 3 and a fourth electrode set Set 4 are disposed on the second substrate 302 to face the first substrate 301. Is formed.

Each of the third electrode set 3 and the fourth electrode set 4 may also include a plurality of third electrodes 308 and a fourth electrode disposed at random intervals along one direction of the second substrate 302. The electrode 309 includes a third connecting electrode 310 connecting the third electrodes 308 and a fourth connecting electrode 311 connecting the fourth electrodes 309.

Here, the third electrodes 308 and the fourth electrodes 309 are striped along a direction Y perpendicular to the first direction X, unlike the first and second electrodes 304 and 306. Are arranged in a pattern. That is, the first electrodes 304, the second electrodes 306, the third electrodes 308, and the fourth electrodes 309 are each of the first substrate 301 and the second substrate 302. ) Are combined, they are placed crosswise in a vertical state.

The third electrode set 3 and the fourth electrode set 4 are formed to substantially cover the entire area corresponding to the display area of the display panel 500, and the third and fourth electrodes 308 and 4 are adjacent to each other. Although there is a predetermined interval between 309, the liquid crystal 303 is normally black, so that a predetermined region between the adjacent third electrode 308 and the fourth electrode 309 is always an opaque region. Accordingly, light in the transparent region is blocked from leaking at a predetermined interval between the adjacent third and fourth electrodes 308 and 309.

Next, a driving method of driving the barrier 300 by the barrier driver 200 according to the first embodiment of the present invention will be described in detail with reference to FIGS. 4A to 4C and 5A to 5C.

First, a case in which the barrier driver 200 drives the barrier 300 in a stripe form will be described with reference to FIGS. 4A to 4C.

4A and 4B illustrate a voltage applied to each electrode of the barrier 300, and FIG. 4C illustrates a barrier 300 driven in a stripe shape.

As shown in FIGS. 4A and 4B, the barrier driver 200 applies a reference voltage, which is a first driving voltage, to the first electrode set 1 and the second electrode set 2 of the first substrate 301. The liquid crystal driving voltage, which is the second driving voltage, is applied to any one of the third electrode set 3 and the fourth electrode set 4 of the second substrate 302, and a reference voltage is applied to the other one.

In the present exemplary embodiment, the case in which the liquid crystal driving voltage is applied to the fourth electrode set Set 4 will be described. However, the liquid crystal driving voltage may be applied to the third electrode set Set 3. Here, the reference voltage may be a ground voltage, and the liquid crystal driving voltage may be a voltage inverted into a positive voltage and a negative voltage at a specific frequency as shown in FIG. 4B.

By driving in this manner, the first and second electrode sets Set 1 and Set 2 substantially covering the display area of the first substrate 301 serve as a common electrode, and the second substrate 302 is formed of the second substrate 302. The set of four electrodes (Set 4) serves as an electrode for driving the liquid crystal. Since the liquid crystal of the barrier 300 is normally black, the liquid crystal driving voltage and the reference voltages applied to the first and second electrodes 304 and 306 in the region formed by the fourth electrode 309 to which the liquid crystal driving voltage is applied. Due to the difference, the liquid crystal is driven to become a transparent region, and the region formed by the third electrode 308 to which the reference voltage is applied is maintained as an opaque region. Accordingly, the barrier 300 is driven by a stripe-type barrier in which the transparent region is formed long in the Y direction as shown in FIG. 4C. In addition, since the liquid crystal 303 is normally black, a region between the electrode and the electrode to which no voltage is applied is maintained as an opaque region so that light does not pass between the electrode and the electrode. That is, cross talk can be effectively prevented.

Next, a case in which the barrier driving unit 200 drives the barrier 300 in a zigzag form will be described with reference to FIGS. 5A to 5C.

5A and 5B illustrate a voltage applied to each electrode of the barrier 300, and FIG. 5C schematically illustrates a part of the barrier 300 driven in a zigzag form according to the applied voltage.

As shown in FIGS. 5A and 5B, the barrier driver 200 may apply a reference voltage to the second electrode set 2 of the first substrate 301 and the third electrode set 3 of the second substrate 302. The liquid crystal driving voltage is applied to the first electrode set Set 1 of the first substrate 301 and the fourth electrode set Set 4 of the second substrate 302.

By driving in this manner, as shown in FIG. 5C, there is no voltage difference in the region where the second electrode 306 and the third electrode 308 to which the reference voltage is applied are overlapped, and the liquid crystal of the barrier 300 is normally black. Therefore, the region where the second electrode 306 and the third electrode 308 overlap is an opaque region. Similarly, even in a region where the first electrode 304 and the fourth electrode 309 to which the liquid crystal driving voltage is applied do not have a voltage difference and the barrier 300 is normally black, the first electrode 304 and the fourth electrode ( The region where 309 overlaps becomes an opaque region.

On the other hand, in the region where the second electrode 306 to which the reference voltage is applied and the fourth electrode 309 to which the liquid crystal driving voltage is applied overlaps with each other, a voltage difference is generated so that the liquid crystal is driven. Therefore, the second electrode 306 and the fourth electrode are driven. The region where 309 overlaps becomes a transparent region. Similarly, since the voltage difference is generated in the region where the first electrode 304 to which the liquid crystal driving voltage is applied and the third electrode 308 to which the reference voltage is applied overlaps, the liquid crystal is driven, and thus, the first electrode 304 and the third electrode ( The region where 308 overlaps becomes a transparent region.

As described above, since the shape of the opaque region for blocking light is zigzag-shaped, it becomes a zigzag-shaped barrier that can increase the resolution in the horizontal direction.

Next, a driving method in which the barrier driving unit 200 drives the barrier 300 according to the second embodiment of the present invention will be described in detail with reference to FIGS. 6 and 7.

The first embodiment of the present invention relates to a method of driving a barrier when the display screen is in a portrait form in which the display screen is vertically long, and the second embodiment of the present invention is a landscape form in which the display screen is long in the horizontal direction. In this case, the present invention relates to a method of driving a barrier. Therefore, FIGS. 6 and 7 are diagrams in which FIGS. 4C and 5C are rotated by 90 °, respectively, with the X-axis indicating the vertical direction and the Y-axis indicating the horizontal direction.

FIG. 6 illustrates a barrier 300 driven in a stripe form according to a second embodiment of the present invention.

The barrier driver 200 applies a liquid crystal driving voltage to one of the first electrode set Set 1 and the second electrode set Set 2 of the first substrate 301, for example, the second electrode set Set 2. The reference voltage is applied to the third electrode set 3 and the fourth electrode set 4 of the second substrate 302.

By driving in this way, the third and fourth electrode sets Set 3 and Set 4 substantially covering the display area of the second substrate 302 serve as a common electrode, and the first substrate 301 may be formed of a first electrode 301. The set of two electrodes (Set 2) serves as an electrode for driving the liquid crystal. Since the liquid crystal of the barrier 300 is normally black, the second electrodes regions become transparent regions, and the first electrodes regions become opaque regions.

Accordingly, as shown in FIG. 6, the barrier 300 is driven as a barrier suitable for a landscape-type display screen rotated 90 ° of the portrait screen shown in FIG. .

7 is a diagram illustrating a barrier 300 driven in a zigzag form according to a second embodiment of the present invention.

The barrier driver 200 applies a reference voltage to the second electrode set 2 of the first substrate 301 and the fourth electrode set 4 of the second substrate 302, and applies the first substrate 301. The liquid crystal driving voltage may be applied to the first electrode set 1 and the third electrode set 3 of the second substrate 302.

By driving in this way, as shown in FIG. 7, since there is no voltage difference in the region where the second electrode 306 and the fourth electrode 309 to which the reference voltage is applied overlap, the liquid crystal is normally black. ), The region where the first electrode 304 and the fourth electrode 309 overlap with each other becomes an opaque region. Similarly, since there is no voltage difference in the region where the first electrode 304 and the third electrode 308 to which the liquid crystal driving voltage is applied overlap with each other, the region where the first electrode 304 and the third electrode 308 overlap with each other in the barrier 300. Becomes an opaque region.

Meanwhile, in the region where the second electrode 306 to which the reference voltage is applied and the third electrode 308 to which the liquid crystal driving voltage is applied overlaps with each other, a voltage difference is generated to drive the liquid crystal, and thus, the second electrode 306 at the barrier 300. ) And the third electrode 308 overlap the transparent region. Similarly, in the region where the first electrode 304 to which the liquid crystal driving voltage is applied and the fourth electrode 309 to which the reference voltage is applied overlap with each other, a voltage difference occurs to drive the liquid crystal. The region where the fourth electrode 309 overlaps with each other becomes a transparent region.

As described above, the barrier 300 may be driven as a barrier suitable for a landscape-type display screen rotated 90 ° of the portrait screen of FIG. 5C in a zigzag form as shown in FIG. 7.

In addition, by changing the electrode for applying the reference voltage and the electrode for applying the liquid crystal driving voltage, it is possible to select the optimal stereoscopic image according to the position of the user by adjusting the positions of the transparent region and the opaque region in the same portrait form.

Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and various other changes and modifications are possible.

According to the present invention, since the liquid crystal of the barrier is normally black, the region between the electrode and the electrode of the barrier is always an opaque region. Therefore, light can be prevented from being transmitted to the region between the electrode and the electrode, thereby effectively reducing the crosstalk.

In addition, according to the present invention, by varying the voltage applied to the electrode of the barrier, it is possible to selectively implement a barrier in the form of stripes and zigzag.

In addition, when applied to a mobile stereoscopic display device, a barrier suitable for not only a portrait but also a landscape display screen may be implemented.

Claims (10)

A display panel configured to display an image corresponding to an input image signal; A first substrate, a plurality of first electrodes formed in a first direction on the first substrate, a first connection electrode connected to one end of the plurality of first electrodes, and formed between the first electrodes adjacent to the first substrate A plurality of second electrodes, a second substrate facing the first substrate, a plurality of third electrodes formed on the second substrate and formed in a second direction perpendicular to the first direction, and the third substrate adjacent on the second substrate A barrier including a plurality of fourth electrodes formed between the electrodes and a liquid crystal layer in a normally black state disposed between the first substrate and the second substrate, the barrier disposed to correspond to the display panel; And A barrier driver for applying a first voltage, a second voltage, a third voltage, and a fourth voltage to the first electrode, the second electrode, the third electrode, and the fourth electrode, respectively, to drive the barrier; Stereoscopic display device comprising a. The method of claim 1, The barrier is, Further comprising a second connection electrode connected to one end of the plurality of second electrodes, And the barrier driver is configured to apply the first voltage and the second voltage to each of the first electrode and the second electrode through the first and second connection electrodes. The method of claim 1, The barrier is, A third connection electrode connected to one end of the plurality of third electrodes and a fourth connection electrode connected to one end of the plurality of fourth electrodes, And the barrier driver is configured to apply the third voltage and the fourth voltage to each of the third and fourth electrodes through the third and fourth connection electrodes. The method according to any one of claims 1 to 3, Some of the first to fourth voltages are reference voltages, and others are liquid crystal driving voltages. The method of claim 4, wherein The barrier driving unit, The reference voltage is applied to one of the first electrode and the second electrode, and the liquid crystal driving voltage is applied to the other electrode. And applying the reference voltage to one of the third electrode and the fourth electrode and the liquid crystal driving voltage to the other. The method of claim 4, wherein The barrier driving unit, And applying the reference voltage to the first electrode and the second electrode, and applying the liquid crystal driving voltage to any one of the third electrode and the fourth electrode. In the barrier device attached to a stereoscopic image display panel for displaying stereoscopic images using binocular parallax,  A plurality of first electrodes, a first connection electrode connected to the plurality of first electrodes, a first substrate on which a plurality of second electrodes are formed, a second substrate on which a plurality of third electrodes and a plurality of fourth electrodes are formed, and the A barrier including a normally black liquid crystal layer encapsulated between the first substrate and the second substrate; And And a barrier driver configured to apply a first driving voltage to some of the first electrode, the second electrode, the third electrode, and the fourth electrode, and apply a second driving voltage to the remaining electrodes. The method of claim 7, wherein The first electrode and the second electrode are alternately arranged in parallel with each other, The third electrode and the fourth electrode are alternately arranged in parallel with each other, And the first electrode and the third electrode are disposed to be orthogonal to each other. The method according to claim 7 or 8, The first driving voltage is a reference voltage, and the second driving voltage is a liquid crystal driving voltage. The method of claim 7, wherein The barrier is, A second connection electrode connected to one end of the plurality of second electrodes; A third connection electrode connected to one end of the plurality of third electrodes; And Further comprising a fourth connection electrode connected to one end of the plurality of fourth electrodes, The barrier driving unit, The barrier device applies a first driving voltage to some of the first connecting electrode, the second connecting electrode, the third connecting electrode and the fourth connecting electrode, and applies a second driving voltage to the remaining electrodes.

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