KR20120031401A - Stereoscopic 3d display device and method of driving the same - Google Patents

Abstract

PURPOSE: A stereoscopic image display device and a driving method thereof are provided to freely convert 2D and 3D modes by using a liquid crystal lens. CONSTITUTION: A liquid crystal lens(120) is driven by applied voltage. An image panel(140) is located in the back side of the liquid crystal lens. The image panel outputs a first or m parallax image by the liquid crystal lens when the image panel has m views. The m parallax image is divided into n, where n is greater than or equal to 2. The interval between views is designed to be 65mm/n. The image panel moves the first or m parallax image according to the movement of a user(130).

Description

STEREOSCOPIC 3D DISPLAY DEVICE AND METHOD OF DRIVING THE SAME}

The present invention relates to a stereoscopic image display device and a driving method thereof, and more particularly, to a stereoscopic image display device and a driving method capable of realizing a natural stereoscopic image regardless of the viewer's movement.

3D display is simply defined as "the whole system of artificially reproducing 3D screens."

Here, the system includes both software technology that can be viewed in 3D and hardware that actually implements the content created by the software technology in 3D. The reason for including the software domain is that the 3D display hardware requires a separate software content for each stereoscopic implementation.

In addition, the virtual 3D display allows a user to literally feel a three-dimensional effect on a flat display hardware by using a binocular disparity, which appears when the human eye is about 65 mm apart in a horizontal direction, among other factors. The totality of the system. In other words, even though our eyes look at the same thing because of binocular parallax, each one sees a slightly different image (exactly, it shares some of the left and right spatial information), and when these two images are passed through the retina to the brain, the brain sees them. By fusion of each other precisely, we can feel a three-dimensional feeling, and it is a virtual 3D display that creates a virtual three-dimensional effect through a design that displays two left and right images simultaneously and sends them to each eye using a 2D display device.

In order to display two channels of images on a single screen in such a virtual 3D display hardware device, in most cases, one channel is outputted one by one in a horizontal or vertical direction. When two channels of images are output from one display device at the same time, in the case of the autostereoscopic method, the right image is directly input into the right eye and the left image is only into the left eye. In addition, in the case of wearing glasses, the right image is hidden from the left eye and the left image is hidden from the right eye through special glasses for each type.

As such, the two-eye parallax due to the distance between the two eyes is the most important factor for the person to feel the three-dimensional feeling and depth, but besides, there is also a deep relation with the psychological and memory factors. Based on whether it is possible to provide a degree of three-dimensional image information, it is usually divided into a volumetric (volumetric type), three-dimensional representation (holographic type), stereoscopic representation (stereoscopic type).

The volume expression method is a method of allowing perspective to be felt in the depth direction by psychological factors and inhalation effects. It is a three-dimensional computer graphic that displays perspective, superposition, shading and contrast, and movement by calculation, or the viewing angle to an observer. It is applied to so-called IMAX movies that provide this wide screen and cause optical illusions that are sucked into the space.

The three-dimensional representation method known as the most complete stereoscopic image implementation technology can be represented by laser light reproduction holography or white light reproduction holography.

In addition, the stereoscopic expression method uses a physiological factor of both eyes to sense a three-dimensional effect. As described above, when the associated image of the plane including parallax information is visible in the left and right eyes of a human being about 65 mm apart, the brain In the process of fusing them, the spatial information before and after the display surface is generated and stereoscopic photography is used. Such stereoscopic expression methods include a method of wearing glasses and a glasses-free method of not wearing glasses.

Representative methods of not wearing glasses include a lenticular method and a parallax barrier method in which a lenticular lens plate in which cylindrical lenses are arranged vertically is installed in front of the display panel.

Hereinafter, a stereoscopic image display device of a general parallax barrier method will be described in detail with reference to the accompanying drawings.

1 is an exemplary view schematically showing a stereoscopic image display apparatus using a general parallax barrier method.

As shown in the figure, a stereoscopic image display apparatus using a general parallax barrier method is provided on an image panel 40 and a front surface of the image panel 40 simultaneously displaying images for left and right eyes. It consists of the barrier cells 20 arrange | positioned.

In this case, the image panel 40 alternately defines a left eye pixel L for displaying a left eye image and a right eye pixel R for displaying a right eye image. The barrier cell 20 is disposed between 40 and the users 30a and 30b.

In the barrier cell 20, slits 22 are formed between thin barriers 21 called parallax barriers so that left and right eye images are simultaneously displayed through the barrier cell 20.

Accordingly, the left eye image displayed on the left eye pixel L of the image panel 40 reaches the left eye of the user 30a via the slit 22 of the barrier cell 20, and the image of the image panel 40 The right eye image displayed on the right eye pixel R reaches the right eye of the user 30a via the slit 22 of the barrier cell 20. At this time, the left and right eye images respectively detect a parallax that can be detected by a human. ) Is included, and the user 30a combines the two images to recognize the 3D image.

That is, when the user 30a is positioned at the normal position, a left eye image and a right eye image are respectively input to the left and right eyes of the user 30a, and in this case, sufficient time difference information between the left eye image and the right eye image. Is formed so that the user 30a can enjoy a three-dimensional image. In this case, the user 30a is said to be located in the stereoscopic region.

However, if the user 30b moves to the right or left from the normal position and the position is misaligned in the stereotactic region, the left eye image and the right eye image to be entered into the left and right eyes of the user 30b, respectively, are displayed. It is blocked by the barrier 21 of the parallax cell 20, making 3D implementation impossible. In this case, the user 30b is said to be located in the region at the time of inversion.

Using the Pararex barrier method, it has the advantage of viewing 3D images without wearing glasses, while it is impossible to switch between 2D and 3D, and in general, images for left and right two eyes, that is, two views. Because it is not displayed outside, there is a disadvantage in that the viewpoint cannot be moved and viewed freely.

As described above, the two-view stereoscopic image display device has a disadvantage that the 3D viewing area is very narrow. Since the interval between views is 65mm, image flipping occurs when the user moves.

In order to overcome this problem, eye tracking technology can be applied. Among the methods of moving an image and converting the image into a stereoscopic region, modification of the driving circuit for changing the image signal is required. There is a disadvantage in that 3D hearing loss occurs. In addition, when the user moves, it is difficult to convert a natural image.

In addition, there is a limitation that the passive type barrier or lens cannot be applied to the method of shifting the position of the parallax barrier or the lens and converting the position into the stereoscopic region. In addition, in the case of the parallax barrier, luminance decreases due to the barrier, and in the case of the liquid crystal lens, since the response speed of the liquid crystal is slow, fast lens movement is difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a stereoscopic image display device and a driving method thereof to implement both a 2D mode and a 3D mode using a liquid crystal lens.

Another object of the present invention is to provide a stereoscopic image display apparatus and a driving method thereof, which enable a stereoscopic image to be implemented regardless of a user's movement.

Another object of the present invention is to provide a stereoscopic image display apparatus and a driving method thereof to provide a more natural image without image flipping due to image movement when the eye tracking technique is applied.

Other objects and features of the present invention will be described in the configuration and claims of the invention described below.

In order to achieve the above object, the three-dimensional image display device of the present invention is a liquid crystal lens that is driven in accordance with the application of a voltage to function as a lens; And an image panel positioned behind the liquid crystal lens and emitting first to mth parallax images through the liquid crystal lens in the case of m-view, wherein the m parallax images are divided into n (n≥2). By dividing and designing an interval between views of 65 mm / n, the first to m th parallax images may be moved according to a user's movement.

In this case, the image panel may be one of a liquid crystal display, an organic light emitting display, an electroluminescent display, a plasma image display, and an electroluminescent display.

And a control unit for controlling the liquid crystal lens and the image panel and an observation device reading the movement of the user and transmitting information about the movement to the control unit.

A driving method of a stereoscopic image display device according to the present invention includes an image panel for emitting a parallax image and a liquid crystal lens disposed between the image panel and a user and driven according to voltage application to have a lens function. In the method, in the case of m-view, the first to mth parallax images are output through the liquid crystal lens, while the m parallax images are divided into n (n≥2) and the inter-view spacing is designed to be 65 mm / n. The first to m-th parallax image is moved according to the movement of the user.

In this case, one view set is composed of n pairs of first to mth parallax images, and is arranged in order of n first parallax images, ..., n m parallax images.

The image panel is characterized in that the m to first image pixels for displaying the first to m-th parallax image, respectively.

When the set of first to m-th image pixels corresponding to the one view set is defined as a unit pixel, the pair of first to m-th image pixels is divided into n pairs of the first to m-th shape pixels. It is characterized in that the configuration.

The unit pixels may be arranged in order of n m-th image pixels, ..., n-th image pixels.

The virtual lens surface of the liquid crystal lens has a pitch substantially equal to the length of the n-pair first to mth image pixels corresponding to the one view set.

When the user moves from the normal position to the left or right and the position is shifted in the stereoscopic region, the first to m th parallax images are moved according to the movement of the user.

As described above, the stereoscopic image display apparatus and its driving method according to the present invention have the following effects.

First, by freely switching between 2D mode and 3D mode using a liquid crystal lens, it responds to various demands of the consumer and provides an effect of improving 3D luminance compared to the conventional Paralex barrier method.

Second, in the case of implementing 2-view 3D, the stereoscopic region and the stereoscopic region are 1: 1 so that the area for viewing stereoscopic images is very narrow. In contrast, in the present invention, even if a multi-view (multi-view) 3D is implemented, the parallax image is divided into n pieces (n≥2) and the interval between views is designed to be 65mm / n to move the parallax image according to the user's movement. By zooming in, a natural stereoscopic image can be realized regardless of the user's movement.

Third, the image flipping phenomenon due to the image movement using the eye tracking technology is eliminated, while the non-stereoscopic region is removed.

1 is an exemplary view schematically showing a stereoscopic image display device according to a general parallax barrier method.
2 is an exemplary view schematically showing a configuration of a stereoscopic image display device according to an embodiment of the present invention.
3 is a diagram illustrating the principle of a multiview stereoscopic image display device.
4A and 4B exemplarily illustrate a method of driving a stereoscopic image display device according to a first embodiment of the present invention.
5A and 5B exemplarily illustrate a method of driving a stereoscopic image display device according to a second embodiment of the present invention.
6A and 6B exemplarily illustrate a method of driving a stereoscopic image display device according to a third embodiment of the present invention.
7A and 7B exemplarily illustrate a method of driving a stereoscopic image display device according to a fourth embodiment of the present invention.

Hereinafter, exemplary embodiments of a stereoscopic image display device and a driving method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

In a stereoscopic image display device using binocular disparity, there is a liquid crystal lens, that is, a liquid crystal lens electrically driven method in which a liquid crystal layer functions as a lens by using characteristics of liquid crystal molecules.

That is, the general lens controls the path of incident light for each location by using a difference in refractive index between the material constituting the lens and the air. However, the liquid crystal layer may be configured to be driven by a different vertical electric field for each position by applying different voltages to positions of the liquid crystal layer without configuring the lens having such a physical shape. Then, incident light incident on the liquid crystal layer feels a different phase change for each position. As a result, the liquid crystal layer can control the path of the incident light like an actual lens. When the transmission of light is obtained as the light is transmitted through the lens by driving the liquid crystal by applying the vertical electric field as described above, the array structure including the liquid crystal and the electrodes for driving the liquid crystal is called a liquid crystal lens.

FIG. 2 is an exemplary view schematically illustrating a configuration of a stereoscopic image display apparatus according to an exemplary embodiment of the present invention, and illustrates a stereoscopic image display apparatus using the liquid crystal lens as a parallax barrier.

In this case, the stereoscopic image display apparatus according to the embodiment of the present invention shows an example in which the eye tracking technology is applied to the image movement method.

As shown in the figure, the stereoscopic image display device according to an embodiment of the present invention is largely driven according to the application of voltage is located in the liquid crystal lens 120 having a lens function and the rear of the liquid crystal lens 120 is two-dimensional image information And a light source (not shown) positioned at the rear of the image panel 140 and transmitting the light to the image panel 140.

In addition, the stereoscopic image display device according to an embodiment of the present invention reads the movement of the control unit 160 and the user 130 to control the liquid crystal lens 120 and the image panel 140 and the information about the control unit It further includes an observation device 150 for transmitting to (160).

In this case, if the image panel 140 directly emits light, the light source may be omitted.

The liquid crystal lens 120 according to the exemplary embodiment of the present invention has a function of emitting a 2D image signal as a 3D image signal such as a profile of a lens surface, and implements the 2D image panel 140. ) It is located on the front side and functions to emit 3D video signal or 2D video signal as it is depending on whether voltage is applied. That is, by utilizing the characteristic that light is transmitted when no voltage is applied, it is possible to use a switching function such as two-dimensional display when no voltage is applied and three-dimensional display when voltage is applied.

At this time, although not shown in detail in the drawing, the liquid crystal lens 120 according to the embodiment of the present invention is largely defined by a plurality of lens regions facing each other, the first substrate and the second substrate and the first substrate and the first It consists of the liquid crystal layer formed between 2 board | substrates.

In addition, in the image panel 140 according to an embodiment of the present invention, for example, when driven in a two-view, first and second image pixels displaying first and second images, respectively, may be sequentially. The image panel 140 is arranged repeatedly, such as a liquid crystal display (LCD), an organic light emitting diode display (OLED), or an electroluminescent display (LCD) of a direct type or a projection type. A flat panel display such as a display (FED), a plasma display panel (PDP), an electroluminescent display (EL), or the like may be used.

Here, the control unit 160 is electrically connected to the observation device 150, for example, determines how far the user 130 is from the normal position, receives the corresponding movement information, and receives the corresponding movement information. Accordingly, eye tracking may be implemented by controlling a signal applied to the image panel 140 to move an image according to the movement of the user 130.

In this case, the observation device 150 tracks the movement of the pupil of the user 130 or the movement of the head of the user 130 in real time, and calculates the movement of the pupil or the head of the tracked user 130. The motion is converted into motion information and stored, and the motion is transferred to the controller 160.

On the other hand, 3D glasses type is a method that the left eye image and the right eye image are received from the left eye and the right eye, respectively, from any position. That is, the image panel emits a left eye image and a right eye image in all directions and separates the left eye image and the right eye image through glasses.

The glasses-free method can be viewed in the same way as the glasses method if only one user is in a fixed position. Like the glasses, the left and right eye images can be sent to the left and right eyes of the user from the image panel itself. . However, this is commonly used for personal displays such as monitors or mobile phones and may not be seen in 3D depending on location.

However, several people, or moving 3D viewing artificially can not artificially separate the left eye image and right eye image. So we create a view in a multi-view glasses-free way. That is, n views are created by combining two images of a left eye image and a right eye image.

3 is a diagram illustrating the principle of a multiview stereoscopic image display device.

Referring to FIG. 3, for example, when the user 130 sees V1 in the left and V2 in the right, the image viewed from the left feels relatively vivid, moves to the right, V6 in the left, and V7 in the right. When the position is reached, the image seen on the right becomes relatively vivid.

At this time, 3D is normally felt from views 1 to 8, but when the set of views is changed, for example, V8 is received at the left and V1 is received at the right.

For reference, the simplest binocular (2-view) determines a viewpoint and arranges an image panel and a parallax barrier so that different images are seen from the left eye and the right eye at the position. The image panel has a projection surface at a distance from the viewpoint to the image panel, and two perspective projection images each having a perspective center respectively in the left eye and the right eye are alternately arranged vertically for each column of pixels of the image panel. It is relatively easy to realize this, but it is hard to see in three dimensions other than a fixed position, and the visual area is very narrow, and when viewed from the position moved by the left and right eye distances, it is inverted, that is, the convex protrusion and the concave portion are reversed. The drawback is that you get a strange screen as you see it.

Multi-view (multi-view) increases the number of parallaxes by about 4-8, and increases the position which normally looks. When the motion parallax, i.e., the observer moves in the horizontal direction and changes the viewing angle, the stereoscopic image display apparatus 100 can also view images from different angles.

 Usually one view is sized to 65mm, which is the human left and right eye distance. The more views, the wider the 3D field of view, but the lower the resolution.

As described above, when tracking a user's movement with the inter-view interval set to 65 mm, the inter-view interval is 65 mm in the case of the image movement method, which causes image flipping when the image is replaced.

Therefore, in the present invention, when implementing 2-view and multi-view 3D with tracking technology, the parallax image is divided into n pieces (n≥2) and the interval between views is designed to be 65mm / n to move the parallax image according to the user's movement. By making it possible to implement a natural three-dimensional image regardless of the user's movement, it will be described in detail with reference to the drawings.

In this case, as n increases, a more natural image may be provided.

4A and 4B exemplarily illustrate a method of driving a stereoscopic image display device according to a first embodiment of the present invention, and show an example in which eye tracking technology is applied to an image movement method.

4A and 4B show an example of a driving method when dividing an existing parallax image into n (= 2) in a two-view and designing an interval between views as 65 mm / 2.

First, as illustrated in FIG. 4A, when the user is in the normal position, the first and second parallax images 1 and 2 are displayed on the image panel 140 according to the first embodiment of the present invention, respectively. The second and first image pixels V2 and V1 are repeatedly arranged.

At this time, one view set S is composed of two pairs of first and second parallax images 1 and 2, and a pair of first and second parallax images 1 and 2 are alternately arranged. Instead, for example, two first parallax images 1 and two second parallax images 2 are arranged in this order.

In addition, two pairs of the first and second image pixels V1 and V2 are also included in the image panel 140, for example, two second image pixels V2 and two first image pixels V1. It will be arranged in order. In this case, when a set of first and second image pixels corresponding to one view set is defined as a unit pixel, the unit pixel 145 according to the first exemplary embodiment of the present invention may be configured as a unit pixel. It can be seen that the pair of first and second image pixels are divided into two pairs of the first and second image pixels V1 and V2. As described above, the arrangement is performed in the order of two second image pixels V2 and two first image pixels V1.

In this case, the virtual lens surface 125 of the liquid crystal lens (not shown) has a pitch substantially equal to the length of the two pairs of the first and second image pixels V1 and V2 corresponding to one view set S. FIG. It is formed to have.

In this case, the inter-view interval P1 is designed to be 65 mm / n, that is, 32.5 mm, as one conventional parallax image is divided into n (= 2).

On the other hand, when the user moves from the normal position, for example, to the right, and the position is distorted in the stereotactic region, as shown in FIG. 4B, the first and second parallax images according to the movement of the user ( By moving the 1, 2), the stereoscopic vision can be eliminated, and the viewing area is enlarged.

In addition, even when the user is positioned in the non-stereoscopic region existing between the first parallax image and the second parallax image, the first and second parallax images are divided into two and thus a natural three-dimensional image is generated. I can see it.

In addition, in the case of using a liquid crystal lens, there is an advantage in that the luminance deterioration is smaller in the 3D implementation than the parallax barrier.

In this case, the movement of the first and second parallax images 1 and 2 is substantially performed through the movement of the first and second image pixels V1 and V2 arranged on the image panel 140.

5A and 5B illustrate a driving method of a stereoscopic image display device according to a second exemplary embodiment of the present invention. In FIG. The driving method in the case of designing 65 mm / 3 is shown as an example.

First, as shown in FIG. 5A, when the user is in the normal position, the first and second parallax images 1 and 2 are displayed on the image panel 240 according to the second embodiment of the present invention. The second and first image pixels V2 and V1 are repeatedly arranged.

At this time, one view set S is composed of three pairs of first and second parallax images 1 and 2, and a pair of first and second parallax images 1 and 2 are alternately arranged. Instead, for example, three first parallax images 1 and three second parallax images 2 are arranged in this order.

In response, three pairs of the first and second image pixels V1 and V2 are also included in the image panel 240, for example, three second image pixels V2 and three first image pixels V1. It will be arranged in order. In this case, when a set of first and second image pixels corresponding to one view set is defined as a unit pixel, the unit pixel 245 according to the second embodiment of the present invention may be a pair of first pixels. It can be seen that the first and second image pixels are divided into three pairs of the first and second image pixels V1 and V2. As described above, the arrangement is performed in the order of the three second image pixels V2 and the three first image pixels V1.

At this time, the virtual lens surface 225 of the liquid crystal lens (not shown) has a pitch substantially equal to the length of the three pairs of the first and second image pixels V1 and V2 corresponding to one view set S. It is formed to have.

In this case, the inter-view spacing P2 is designed to be 65 mm / 3, approximately 21.6 mm, as one conventional parallax image is divided into n (= 3) pieces.

On the other hand, when the user moves from the normal position, for example, to the right, and the position is distorted in the stereotactic region, as shown in FIG. 5B, the first and second parallax images according to the movement of the user ( By moving the 1, 2), the stereoscopic vision can be eliminated, and the viewing area is enlarged.

In addition, even when the user is located in the non-stereoscopic region existing between the first parallax image and the second parallax image, as the first and second parallax images are divided into three, a natural three-dimensional image is generated. I can see it.

In this case, the movement of the first and second parallax images 1 and 2 is substantially performed through the movement of the first and second image pixels V1 and V2 arranged on the image panel 240.

At this time, the driving method of the stereoscopic image display apparatus according to the first and second embodiments of the present invention has been described with an example of dividing the existing one parallax image into two or three in the two-view. However, the present invention is not limited thereto, and the present invention can be applied even when one parallax image is divided into four or more, and as n increases, a more natural image can be provided.

In addition, the first and second embodiments of the present invention exemplarily illustrate a method of driving a stereoscopic image display device for the two-view case, but the present invention is not limited thereto. In addition, it is possible to provide more natural video viewing without changing the margins of the left and right viewing areas.

6A and 6B exemplarily illustrate a driving method of a stereoscopic image display device according to a third embodiment of the present invention. In FIG. The driving method in the case of designing 65mm / 2 is shown as an example.

First, as shown in FIG. 6A, when the user is in the normal position, the first, second, third and fourth parallax images 1 and 2 are displayed on the image panel 340 according to the third embodiment of the present invention. The fourth, third, third and first image pixels V4, V3, V2, and V1, which respectively display 3, 4, respectively, are repeatedly arranged.

In this case, one view set S includes two pairs of first, second, third and fourth parallax images 1, 2, 3, and 4, and a pair of first, second, and third pairs of images. And the fourth parallax images 1, 2, 3, and 4 are not alternately arranged, for example, two first parallax images 1, two second parallax images 2, and two third parallaxes. The image 3 and two fourth parallax images 4 are arranged in this order.

In response, two pairs of the first, second, third and fourth image pixels V1, V2, V3, and V4 are also included in the image panel 340, for example, two fourth image pixels V4. , Two third image pixels V3, two second image pixels V2, and two first image pixels V1. In this case, when a set of first, second, third, and fourth image pixels corresponding to one view set is defined as a unit pixel, the unit pixel 345 according to the third embodiment of the present invention is an existing unit. It is assumed that a pair of first, second, third and fourth image pixels are divided into two pairs of first, second, third and fourth image pixels V1, V2, V3, and V4 in a pixel. Can be. As described above, the arrangement is performed in order of two fourth image pixels V4, two third image pixels V3, two second image pixels V2, and two first image pixels V1. Will be made.

In this case, the virtual lens surface 325 of the liquid crystal lens (not shown) may have two pairs of the first, second, third and fourth image pixels V1, V2, V3, corresponding to one view set S. It is formed to have a pitch substantially the same as the length of V4).

In this case, the inter-view spacing P3 is designed to be 65 mm / n, that is, 32.5 mm, as one conventional parallax image is divided into n (= 2).

On the other hand, when the user moves from the normal position, for example, to the right, and the position is misaligned in the stereotactic region, as shown in FIG. 6B, first, second, and third according to the movement of the user. And by moving the fourth parallax image (1, 2, 3, 4), the inverse stereoscopic vision can be eliminated and the viewing area is enlarged.

Also, a non-stereoscopic image existing between the first parallax image and the second parallax image, the second parallax image and the third parallax image, the third parallax image and the fourth parallax image, or the fourth parallax image and the first parallax image as before. Even when the user is located in the visual field, one first, second, third, and fourth parallax images are divided into two, so that a natural three-dimensional image can be viewed.

In this case, the movement of the first, second, third, and fourth parallax images 1, 2, 3, and 4 may be substantially the first, second, third, and fourth images arranged on the image panel 340. This is achieved by the movement of the pixels V1, V2, V3, and V4.

7A and 7B illustrate a driving method of a stereoscopic image display device according to a fourth exemplary embodiment of the present invention. In FIG. The driving method in the case of designing 65 mm / 3 is shown as an example.

First, as shown in FIG. 7A, when the user is in the normal position, the first, second, third and fourth parallax images 1 and 2 are displayed on the image panel 440 according to the fourth embodiment of the present invention. The fourth, third, third and first image pixels V4, V3, V2, and V1, which respectively display 3, 4, respectively, are repeatedly arranged.

In this case, one view set S includes three pairs of first, second, third and fourth parallax images 1, 2, 3, and 4, and a pair of first, second, and third pairs of images. And the fourth parallax images 1, 2, 3, and 4 are not alternately arranged, for example, three first parallax images 1, three second parallax images 2, and three third parallaxes. The image 3 and the three fourth parallax images 4 are arranged in this order.

In addition, three pairs of the first, second, third, and fourth image pixels V1, V2, V3, and V4 are also included in the image panel 440, for example, three fourth image pixels V4. , Three third image pixels V3, three second image pixels V2, and three first image pixels V1. In this case, when a set of first, second, third, and fourth image pixels corresponding to one view set is defined as a unit pixel, the unit pixel 445 according to the fourth embodiment of the present invention is an existing unit. It is assumed that a pair of first, second, third and fourth image pixels are divided into three pairs of first, second, third and fourth image pixels V1, V2, V3, and V4 in a pixel. Can be. As described above, the arrangement is the order of three fourth image pixels V4, three third image pixels V3, three second image pixels V2, and three first image pixels V1. Will be made.

In this case, the virtual lens surface 425 of the liquid crystal lens (not shown) includes three pairs of the first, second, third and fourth image pixels V1, V2, V3, which correspond to one view set S. It is formed to have a pitch substantially the same as the length of V4).

The inter-view spacing P4 in this case is designed to be 65 mm / 3, approximately 21.6 mm, as one conventional parallax image is divided into n (= 3).

On the other hand, when the user moves from the normal position, for example, to the right, and the position is misaligned in the stereoscopic region, as shown in FIG. 7B, first, second, and third according to the movement of the user. And by moving the fourth parallax image (1, 2, 3, 4), the inverse stereoscopic vision can be eliminated and the viewing area is enlarged.

Also, a non-stereoscopic image existing between the first parallax image, the second parallax image, the second parallax image, and the third parallax image, the third parallax image and the fourth parallax image, or the fourth parallax image and the fourth parallax image as before. Even when the user is located in the visual field, one first, second, third and fourth parallax images are divided into three, so that a natural three-dimensional image can be viewed.

In this case, the movement of the first, second, third, and fourth parallax images 1, 2, 3, and 4 may be substantially the first, second, third, and fourth images arranged on the image panel 440. This is achieved by the movement of the pixels V1, V2, V3, and V4.

In this case, the driving method of the stereoscopic image display apparatus according to the third and fourth embodiments of the present invention has been described with an example of dividing an existing parallax image into two or three in four views. However, the present invention is not limited thereto, and the present invention can be applied even when one parallax image is divided into four or more, and as n increases, a more natural image can be provided.

Many details are set forth in the foregoing description but should be construed as illustrative of preferred embodiments rather than to limit the scope of the invention. Therefore, the invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

120: liquid crystal lens 125,225,325,425: lens surface
140,240,340,440: Image panel 145,245,345,445: Unit pixel
V1, V2, V3, V4: Image Pixel

Claims (10)

A liquid crystal lens driven according to voltage application to function as a lens; And
Located in the rear of the liquid crystal lens, in the case of the m-view includes an image panel for emitting the first to m-th parallax image through the liquid crystal lens, dividing the m parallax images into n (n≥2) And an inter-view interval of 65 mm / n to move the first to m th parallax images according to a user's movement. The stereoscopic image display apparatus according to claim 1, wherein the image panel is one of a liquid crystal display, an organic light emitting display, an electroluminescent display, a plasma image display, and an electroluminescent display. The stereoscopic image display device of claim 1, further comprising a controller for controlling the liquid crystal lens and the image panel, and an observation device for reading a movement of the user and transmitting information about the movement to the controller. A driving method of a stereoscopic image display device comprising an image panel emitting a parallax image and a liquid crystal lens disposed between the image panel and the user and driven according to voltage application, the lens having a lens function,
In the case of m-view, the first to mth parallax images are emitted through the liquid crystal lens, while the m parallax images are divided into n (n≥2) and the inter-view spacing is designed to be 65 mm / n, thereby moving the user. And moving the first to m-th parallax images according to the movement of the stereoscopic image display device. The method of claim 4, wherein one view set is composed of n pairs of first to mth parallax images, and is arranged in order of n first parallax images, ..., n m parallax images. A driving method of a stereoscopic image display device. 6. The driving method of claim 5, wherein the image panel is repeatedly arranged with m-th image pixels for displaying the first to m-th parallax images, respectively. The method of claim 6, wherein when the set of first to m-th image pixels corresponding to the one view set is defined as unit pixels, the pair of first to m-th image pixels includes n pairs of first pairs of first to m-th image pixels. And a m-th pixel. 8. The driving method of claim 7, wherein the unit pixels are arranged in the order of n m-th image pixels, ..., n first image pixels. 7. The stereoscopic image display apparatus of claim 6, wherein the virtual lens surface of the liquid crystal lens has a pitch substantially equal to a length of n pairs of first to mth image pixels corresponding to the one view set. Driving method. The method of claim 4, wherein when the user moves from the normal position to the left or the right and the position is shifted in the stereoscopic region, the first to m-th parallax images are moved according to the movement of the user. Method of driving a stereoscopic image display device.

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