KR101717650B1 - Stereoscopic 3d display device and method of driving the same - Google Patents

Abstract

The three-dimensional image display apparatus and the driving method thereof according to the present invention are characterized in that first to n-th image pixels realizing an n-view (n is a natural number of 3 or more) are sequentially and repeatedly arranged, (A is a natural number of 2 or more) frames by using a high-resolution image panel, the 60 Hz image is alternately displayed by alternating with a (a is a natural number of 2 or more) frames and is synchronized with the switch frames so that the switchable lens is 1 / a Eye 3D point 3D is realized without reducing the resolution by shifting the pitch by the pitch.

Description

TECHNICAL FIELD [0001] The present invention relates to a stereoscopic image display device,

The present invention relates to a stereoscopic image display apparatus and a method of driving the same, and more particularly, to a stereoscopic image display apparatus capable of implementing a multi view 3D by a switchable lens method and a driving method thereof .

A simple definition of 3D display is "the total system that artificially reproduces the 3D screen".

Here, the system includes a software technique that can be viewed in 3D and a hardware that actually realizes the content created by the software technique in 3D. The reason for incorporating the software area is that the 3D display hardware requires separately configured contents in a separate software manner for each stereoscopic implementation method.

In addition, the virtual 3D display makes it possible to literally feel the stereoscopic effect in the flat display hardware by using the binocular disparity which is caused when the eye is about 65 mm away from the horizontal direction among the various factors of the human feeling of three-dimensional feeling System. In other words, our eyes see a different image (a little bit of space between the left and the right, respectively) even if we look at the same things because of binocular parallax. When these two images are transmitted to the brain through the retina, By fusing them exactly, we can feel the stereoscopic effect. It is the virtual 3D display that uses it to create a virtual stereoscopic effect through a design that simultaneously displays two left and right images on a 2D display device and sends them to each eye.

In order to display images of two channels on one screen in such a virtual 3D display hardware device, in most cases, one channel is changed one line at a time horizontally or vertically in one screen. At the same time, when images of two channels are output from one display device, in the case of a non-eyeglass system due to the hardware structure, the right image enters the right eye as it is, and the left image enters only the left eye. In addition, in the case of wearing the glasses, the right image is visually obscured by the special glasses suitable for each method, and the left image is obscured by the right eye so that the right eye can not be seen.

As mentioned above, the binocular parallax due to the interval between the two eyes is the most important factor for the person to feel the three-dimensional feeling and the depth feeling, but there is also a deep relationship with the psychological and memory factors. Accordingly, Dimensional image information, a volumetric type, a holographic type, and a stereoscopic type based on whether the three-dimensional image information can be provided.

The volume expression method is a method for making the depth direction perceive by the psychological factors and the suction effect, and is a three-dimensional computer graphic which displays the perspective method, overlapping, shading, contrast, and movement by calculation, So-called IMAX films, which give rise to an optical illusion that it is sucked into the space by providing a large screen.

The three-dimensional representation known as the most complete stereoscopic imaging technique can be represented by laser light reproduction holography or white light reproduction holography.

As described above, when an association image of a plane including parallax information is displayed on the left and right sides of a human being present at a distance of about 65 mm as described above, the brain expresses three-dimensional images using the physiological factors of both eyes. And the ability to generate spatial information before and after the display surface in the process of fusing them to sense a stereoscopic effect, that is, stereography. Such a three-dimensional expression system is largely classified into a system in which glasses are worn and a system in which glasses are not worn.

Representative examples of a method of not wearing glasses include a lenticular method and a parallax barrier method in which a lenticular lens plate vertically arranging a cylindrical lens is disposed in front of the display panel.

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

Fig. 1 is a diagram schematically showing a configuration of a stereoscopic image display apparatus using a general parallax barrier system.

As shown in the figure, a stereoscopic image display apparatus using a general parallax barrier system includes an image panel 40 for simultaneously displaying images for left and right eyes, and a display panel 40 for displaying images on the front And arranged barrier cells 20.

In this case, the image panel 40 includes a left eye pixel L for displaying an image for the left eye and a right eye pixel R for displaying an image for the right eye, The barrier cell 20 is disposed between the user 30 and the substrate 40. [

The barrier cell 20 has a slit 22 formed between thinner barriers 21 called a pararex barrier so that the left and right eye images are simultaneously displayed through the barrier cell 20 .

The left eye image displayed on the left eye pixel L of the image panel 40 reaches the left eye of the user 30 via the slit 22 of the barrier cell 20, The right eye image displayed on the right eye pixel R reaches the right eye of the user 30 via the slit 22 of the barrier cell 20. At this time, ), And the user 30 recognizes the three-dimensional image by combining the two images.

The parallax barriers are advantageous in that they can be viewed without wearing glasses. On the other hand, since 2D and 3D conversion are impossible and only two images are displayed on the left and right sides, Since the left and right eye images are separated and displayed using a 60 Hz image panel, the 3D resolution is reduced to 1/2 of 2D contrast.

FIGS. 2A and 2B are views showing an example of a left eye image and a right eye image of a video panel in a general stereoscopic image display apparatus.

3A and 3B are schematic views illustrating a left eye image and a right eye image through a barrier cell in a conventional stereoscopic image display apparatus.

Referring to FIGS. 2A and 2B, images are separated into left and right eye images 50L and 50R by the image panel, and sequentially displayed in time division.

3A and 3B, a left eye image 50L 'having a half resolution of a 2D image is displayed on the left eye through the barrier cell. In this case, And a right eye image 50R 'having a resolution of 1/2 the resolution of the 2D image is input to the right eye.

In this way, the left and right eye images 50L 'and 50R' of 1/2 resolution can not be seen on the left and right sides due to the barrier 21, and the left and right eye images 50L ' 50R '), the resolution of the image is reduced to ½. Reference numeral 22 denotes a slit between the barrier 21.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stereoscopic image display device and a method of driving the stereoscopic image display device, which realize a stereoscopic 3D pointlessness without degrading resolution by using a switchable lens system.

Other objects and features of the present invention will be described in the following description of the invention and claims.

According to an aspect of the present invention, there is provided a stereoscopic image display apparatus including first to n-th images each displaying a first to an n-th image of 60 Hz, Pixels arranged in sequence so that the first through the n-th images are alternated with a (a is a natural number equal to or greater than two) frames, and a video panel disposed between the video panel and the user, And a liquid crystal lens which functions as a lens and synchronizes with the time division driving of the image panel so that the profile of the lens surface moves by 1 / a pitch in the next frame with respect to the previous frame.
At this time, the lens surface may have the same pitch as the length of one view set of one of the first to n-th image pixels.

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

The image panel is characterized in that first to n-th image pixels, which respectively represent first to n-th images, are sequentially and repeatedly arranged to implement a n-view, which is a multi-view method.

The liquid crystal lens includes a first substrate and a second substrate, and a liquid crystal layer formed between the first substrate and the second substrate, and outputs a two-dimensional image signal as a three-dimensional image signal like a profile of a lens surface do.

A method of driving a stereoscopic image display device includes driving a stereoscopic image display device including a video panel displaying an image, and a liquid crystal lens disposed between the video panel and a user, The first through n-th image pixels realizing a n-view (n is a natural number of 3 or more) are sequentially and repeatedly arranged in the image panel so that the first through n-th images of 60 Hz are a Is synchronized with the time division driving of the image panel so that the profile of the lens surface of the liquid crystal lens is shifted by 1 / a pitch in the next frame with respect to the previous frame, .

At this time, when the 3D display of the n-view is implemented with the image panel having the resolution of M x N, the 3D resolution is set to (M x N) x a x using the image panel of a x 60 Hz and the liquid crystal lens driven at a x 60 Hz (1 / n) times.

In the case of a 2-view driven at 120 Hz, 60 Hz images are alternately displayed for each frame of 2 (a) of the first and second frames on the image panel, and the first and second images Is repeatedly emitted.

In this case, in the second frame, the liquid crystal lens is moved by 1 / a, that is, a half pitch in synchronization with the time division driving of the image panel, and the second and first images are repeatedly output in order.

In the case of a 4-view driven at 120 Hz, 60 Hz images are alternately displayed for each frame of 2 (a) of the first and second frames on the image panel, and the first, And the third and fourth images are repeatedly emitted.

In this case, in the second frame, the liquid crystal lens is moved by 1 / a, that is, by 1/2 pitch in synchronization with the time division driving of the image panel, and the third, fourth, first and second images are repeatedly output .

In the case of a 4-view driven at 240 Hz, images of 60 Hz are alternately displayed for each frame of 4 (a) of the first, second, third and fourth frames on the image panel, And the first, second, third, and fourth images are repeatedly emitted.

In this case, in the second frame, the liquid crystal lens is moved by 1 / a, that is, 1/4 pitch in synchronism with the time division driving of the image panel, and the fourth, first, second, . In the third frame, the liquid crystal lens is moved by 1/4 pitch again in synchronization with the time-division driving of the image panel, and the third, fourth, first and second images are repeatedly output in order . In the fourth frame, the liquid crystal lens is moved by 1/4 pitch again in synchronization with the time-division driving of the image panel, and the second, third, fourth, and first images are sequentially output in order .

As described above, in the stereoscopic image display apparatus and the driving method thereof according to the present invention, in a stereoscopic image display apparatus of a switchable lens type, an image of 60 Hz is alternately displayed for every a frame using a high resolution image panel , And the switchable lens is shifted by 1 / a pitch in synchronism therewith, thereby providing a 3D image having the same resolution as that of 2D.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram schematically showing a configuration of a stereoscopic image display apparatus according to a general parallax barrier system. Fig.
FIGS. 2A and 2B illustrate a left eye image and a right eye image of a video panel in a conventional stereoscopic image display device.
3A and 3B schematically illustrate a left eye image and a right eye image through a barrier cell in a conventional stereoscopic image display apparatus.
4 is a view exemplarily showing the principle of a multi view stereoscopic image display apparatus.
5 is a cross-sectional view schematically showing a configuration of a stereoscopic image display apparatus according to an embodiment of the present invention.
6A and 6B illustrate a method of driving a stereoscopic image display apparatus according to a first embodiment of the present invention.
7A and 7B illustrate a method of driving a stereoscopic image display apparatus according to a second embodiment of the present invention.
8A to 8D illustrate a method of driving a stereoscopic image display apparatus according to a third embodiment of the present invention.
Fig. 9A is an exemplary diagram schematically showing the driving of the stereoscopic image display apparatus according to the first embodiment of the present invention in the first frame; Fig.
FIG. 9B is an exemplary view schematically showing the driving of the stereoscopic image display apparatus according to the first embodiment of the present invention in the second frame; FIG.
FIGS. 10A and 10B illustrate a left eye image and a right eye image through a liquid crystal lens according to a first embodiment of the present invention in a first frame; FIG.
11A and 11B illustrate a left eye image and a right eye image through a liquid crystal lens according to a first embodiment of the present invention in a second frame;

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

Fig. 4 is a diagram exemplifying the principle of the multi-view image display apparatus. Fig.

In the eyeglasses-type 3D, the left eye image and the right eye image come into the left eye and the right eye, respectively. That is, the image panel diverges the left eye image and the right eye image in all directions, and separates the left eye image and the right eye image through glasses.

In the non-eyeglass system, if only one user is in a fixed position, the user can see the same shape as the above-described glasses system. In the same way as wearing glasses, the left and right eye images can be sent to the left and right eyes of the user respectively . However, this is typically used in personal displays such as monitors or cell phones, and may not be visible in 3D depending on location.

However, it is impossible to artificially separate the left eye image and the right eye image from a plurality of persons, or a moving 3D image. So we create a view in a non-point-to-point fashion. That is, two images of the left eye image and the right eye image are combined to form n views.

Referring to FIG. 4, for example, when the person 130 looks at V1 in the left eye and V2 in the right eye, the image seen from the left becomes relatively vivid and moves to the right to move V6 in the left eye and V7 in the right eye When you are in position, the image you see on the right side will feel relatively vivid.

At this time, the view 1 to 8 feel normal 3D, but when the set of the view is changed, V8 is left in the left eye and 3D is not felt at the time of receiving V1 in the right eye. Normally, the size of one view is made to be 65mm, which is the universal left and right eye distance of a person. The larger the view, the wider the 3D viewing angle, but the lower the resolution.

For reference, the simplest binocular has a certain point in time and positions the image panel and the parallax barrier so that different images can be seen in the left and right eyes at that position. In the image panel, two perspective projected images, each having a projection center at the left eye and at the right eye, are vertically arranged for each pixel column of the image panel and arranged alternately. This is relatively easy to realize, but it can be seen that the visual area is very narrow because it can not be viewed in three dimensions except for the fixed position, and that when viewed from the position shifted by the right and left eye distances, the inverse stereoscopic image, There is a drawback that it becomes a strange screen as shown.

The multi-view (multi-point) increases the number of parallaxes to about 4 to 8, thereby increasing the position normally seen. When the motion parallax, that is, the viewing angle of the observer moving in the lateral direction is changed, the stereoscopic image display apparatus 100 can also view images from different angles, but the resolution is reduced to 1 / view number as described above .

In the case of the present invention, a 60 Hz image is alternately displayed for every a frame using a high resolution image panel, and the switchable lens is shifted by 1 / a pitch in synchronism with the 3D image. .

In the case of a conventional lenticular lens or the like, the shape of the lens is fixed and the movement of the lens is not possible. However, in the case of the present invention, the liquid crystal lens is formed by the refractive index change having a slope in the shape of the plane lens, .

That is, a general lens controls the path of the incident light according to the position by using the refractive index difference between the material constituting the lens and air. However, it is possible to configure the liquid crystal layer to be driven by different vertical electric fields for each position by applying different voltages to the liquid crystal layers at different positions without forming the lens of such a physical shape. Then, the incident light incident on the liquid crystal layer experiences a different phase change for each position, and as a result, the liquid crystal layer can control the path of the incident light like an actual lens. An array structure including a liquid crystal and electrodes for driving the liquid crystal is called a liquid crystal lens when the vertical electric field is applied and the transmission of light by the driving of the liquid crystal is achieved as it is transmitted through the lens.

5 is a cross-sectional view schematically showing a configuration of a stereoscopic image display apparatus according to an embodiment of the present invention, and shows a stereoscopic image display apparatus using the liquid crystal lens as a parallax barrier.

However, the present invention is not limited to the electrode structure of the liquid crystal lens shown in FIG. 5, and the liquid crystal lens according to the present invention can be realized through various electrode structures.

As shown in the drawing, a stereoscopic image display device according to an embodiment of the present invention includes a liquid crystal lens 110 driven by a voltage and having a lens function, and a liquid crystal lens 110 disposed under the liquid crystal lens 110 to generate two- And a light source 160 positioned below the image panel 140 and transmitting light to the image panel 140. [

At this time, if the image panel 140 directly emits light, the light source 160 may be omitted.

The first and second image pixels V1 and V2 for sequentially displaying the first and second images I1 and I2 are sequentially and repeatedly arranged in the image panel 140, Type or projection type liquid crystal display (LCD), an organic light emitting diode (OLED) display, a field emission display (FED), a plasma display panel (PDP), and an electroluminescent display (EL) may be used.

In particular, the image panel 140 according to the embodiment of the present invention uses a high-resolution flat panel display device driven at 60 Hz or more.

The liquid crystal lens 110 according to the embodiment of the present invention has a function of emitting a two-dimensional image signal as a three-dimensional image signal like a profile of a lens surface 125, (140), and selectively emits a three-dimensional image signal or a two-dimensional image signal according to whether a voltage is applied or not. That is, by using the characteristic that the light is transmitted when the voltage is not applied, the switching function such as the two-dimensional display when the voltage is not applied and the three-dimensional display when the voltage is applied can be used.

Hereinafter, the liquid crystal lens 110 according to the embodiment of the present invention will be described in detail.

The liquid crystal lens 110 according to the embodiment of the present invention has a function of outputting a two-dimensional image signal as a three-dimensional image signal like a profile of a lens surface 125, in which a plurality of lens regions are defined, A first substrate 105 and a second substrate 115 and a liquid crystal layer 106 formed between the first substrate 105 and the second substrate 115.

At this time, a common electrode 107 made of a transparent conductive material, that is, a first electrode is formed on the entire surface of the first substrate 105 on the first substrate 105 as an upper substrate.

A plurality of second electrodes 117a and 117b are formed on the inner surface of the second substrate 115 which is a lower substrate facing the first substrate 105 with respect to the respective lens regions, 119 are interposed therebetween. However, the present invention is not limited thereto, and the plurality of second electrodes 117a and 117b may be separated from each other on a single layer. At this time, the plurality of second electrodes 117a and 117b may be made of a transparent conductive material.

Vmax, V1, V2, ..., Vmax for applying different voltages to the plurality of second electrodes 117a, 117b are formed on the second substrate 115, Can be formed.

A first alignment layer 108 and a second alignment layer 118 are formed on inner surfaces of the first substrate 105 and the second substrate 115 having such a structure. A liquid crystal layer 106 is formed between the first substrate 105 and the second substrate 115 on which the two orientation films 118 are formed. At this time, between the plurality of second electrodes 117b formed on the insulating layer 119 and the second alignment layer 118, the overcoat layer (not shown) Not shown) can be further formed.

At this time, a first voltage Vmin corresponding to a threshold voltage is applied to the second electrodes 117a and 117b positioned at the center of the lens region, and the second electrodes 117a and 117b positioned at the edge portions of the lens regions, The highest n-th voltage Vmax is applied. In this case, a voltage applied to the plurality of second electrodes 117a and 117b located between the center of the lens region and the edge portion is between the nth voltage Vmax and the threshold voltage Vmin of the lens region, A voltage having a value gradually increasing toward the center of the lens region is applied. When a ground voltage is applied to the common electrode 107 in a state where a voltage is applied to the plurality of second electrodes 117a and 117b, the plurality of second electrodes 117a and 117b, A vertical electric field is formed between the first electrode 107 and the second electrode 107.

When a voltage is applied in this manner, the voltage difference applied between the plurality of second electrodes 117a and 117b adjacent to each other becomes 1V or less, and a horizontal electric field formed between the plurality of second electrodes 117a and 117b It should not occur to a large extent.

The second electrodes 117a and 117b and the common electrodes 107a and 117b are electrically connected to the second electrodes 117a and 117b by a voltage gradually decreasing from the edge portion to the center of the lens region. ), And the entirety thereof has the same phase change as a convex lens having a convex semicircular or parabolic shape.

In particular, the liquid crystal lens 110 according to the embodiment of the present invention controls the voltage applied between the plurality of second electrodes 117a and 117b to move the profile of the lens surface 125 by a predetermined distance .

Meanwhile, when the stereoscopic image display apparatus according to the embodiment of the present invention configured as described above realizes 3D (in case of n-view) again with an image panel having a resolution of M x N, A stereoscopic image display apparatus of the present invention can realize a 3D image with the same resolution as that of 2D by making the 3D resolution be (M x N) x a x (1 / n) times by using a switchable lens driving at 60 Hz. The driving method will be described in detail with reference to the drawings.

6A and 6B illustrate a driving method of a stereoscopic image display apparatus according to a first embodiment of the present invention. An example of a method of driving a stereoscopic image display apparatus in a two-view driving mode at 120 Hz .

First, as shown in FIG. 6A, in the case of a 2-view driving at 120 Hz, the first and second images I1 and I2 are respectively displayed on the image panel 140 according to the first embodiment of the present invention The first and second image pixels V1 and V2 are sequentially and repeatedly arranged.

At this time, one view set is composed of one first and second image pixels V1 and V2, and correspondingly, a virtual lens surface 125 of a liquid crystal lens (not shown) And are formed to have substantially the same pitch.

In the image panel 140 according to the first embodiment of the present invention, images of 60 Hz are alternately displayed for each frame of 2 (a) frames of the first and second frames. Accordingly, in the first frame, The first and second images I1 and I2 are repeatedly emitted.

In the second frame, as shown in FIG. 6B, the liquid crystal lens is moved by 1 / a, that is, by 1/2 pitch in synchronization with the time division driving of the image panel 140, (I2, I1) are repeatedly emitted. At this time, as described above, in the second frame, the first and second image pixels V1 and V2 are shifted by one image pixel (V1, V2) (i.e., 1/2 of the liquid crystal lens) Pitch) and is repeatedly arranged in the image panel 140. [

As a result, the resolution is doubled compared to the conventional 3D resolution, and there is no degradation of the 2D contrast resolution.

FIGS. 7A and 7B illustrate a method of driving a stereoscopic image display apparatus according to a second embodiment of the present invention. FIG. 7A and FIG. 7B illustrate a method of driving a stereoscopic image display apparatus in a 4- .

First, as shown in FIG. 7A, in the case of a 4-view driven at 120 Hz, the first, second, third and fourth images I1 and I2 are displayed on the image panel 240 according to the second embodiment of the present invention, Second, third, and fourth image pixels V1, V2, V3, and V4 are sequentially and repeatedly arranged in the order of I2, I3, and I4, respectively.

At this time, one view set is composed of one first, second, third and fourth image pixels (V1, V2, V3, V4) and corresponds to a virtual lens surface (not shown) of a liquid crystal lens 225 are formed to have a pitch substantially equal to the length of one view set.

In the image panel 240 according to the second embodiment of the present invention, images of 60 Hz are alternately displayed for each frame of 2 (a) of the first and second frames. Accordingly, in the first frame, The first, second, third, and fourth images I1, I2, I3, and I4 are repeatedly emitted.

In the second frame, as shown in FIG. 7B, the liquid crystal lens is shifted by 1 / a, that is, by 1/2 pitch in synchronization with the time division driving of the image panel 240, The first and second images I3, I4, I1, and I2 are repeatedly emitted. As described above, in the second frame, the first, second, third and fourth image pixels V1, V2, V3, and V4 correspond to the two image pixels V1, V2, V3 , V4) (i.e., a half pitch of the liquid crystal lens) and are repeatedly arranged on the image panel 240. [

The result is a 2x increase in resolution over conventional 3D resolution.

8A to 8D are views illustrating a method of driving a stereoscopic image display apparatus according to a third embodiment of the present invention. For example, a method of driving a stereoscopic image display apparatus in a 4-view mode Respectively.

First, as shown in FIG. 8A, in the case of a 4-view driving at 240 Hz, the first, second, third and fourth images I1 and I2 are displayed on the image panel 340 according to the third embodiment of the present invention, Second, third, and fourth image pixels V1, V2, V3, and V4 are sequentially and repeatedly arranged in the order of I2, I3, and I4, respectively.

At this time, one view set is composed of one first, second, third and fourth image pixels (V1, V2, V3, V4) and corresponds to a virtual lens surface (not shown) of a liquid crystal lens 325 are formed to have a pitch substantially equal to the length of one view set.

In the image panel 340 according to the third embodiment of the present invention, images of 60 Hz are alternately displayed for each frame of 4 (a) of the first, second, third and fourth frames, In the first frame, the first, second, third and fourth images I1, I2, I3 and I4 are repeatedly output in order.

In the second frame, as shown in FIG. 8B, the liquid crystal lens is moved by 1 / a, that is, 1/4 pitch in synchronism with the time division driving of the image panel 340, And the third images I4, I1, I2, and I3 are repeatedly emitted. At this time, as described above, in the second frame, the first, second, third and fourth image pixels V1, V2, V3, and V4 correspond to one image pixel V1, V2, V3 , V4) (i.e., 1/4 pitch of the liquid crystal lens) and is repeatedly arranged on the image panel 340. [

In the third frame, as shown in FIG. 8C, the liquid crystal lens is moved by 1 / a, that is, 1/4 pitch in synchronization with the time division driving of the image panel 340, The first and second images I3, I4, I1, and I2 are repeatedly emitted. As described above, in the third frame, the first, second, third and fourth image pixels V1, V2, V3, and V4 correspond to one image pixel V1, V2, V3 , V4) (i.e., 1/4 pitch of the liquid crystal lens) and is repeatedly arranged on the image panel 340. [

In the fourth frame, as shown in FIG. 8D, the liquid crystal lens is moved by 1 / a, that is, 1/4 pitch in synchronism with the time division driving of the image panel 340, 3, the fourth and first images I2, I3, I4 and I1 are repeatedly emitted. As described above, in the fourth frame, the first, second, third and fourth image pixels V1, V2, V3, and V4 correspond to one image pixel (V1, V2, V3 , V4) (i.e., 1/4 pitch of the liquid crystal lens) and is repeatedly arranged on the image panel 340. [

As a result, the resolution is increased by four times that of the conventional 3D resolution, so that there is no degradation of the 2D contrast resolution. That is, in the case of the 4-view, the resolution of the 3D is reduced to 1/4 of the 2D. In the case of the third embodiment of the present invention, the resolution is increased four times as compared with the existing 3D resolution, do.

By using the high-resolution image panel, the 60 Hz image is alternately displayed for every a frame, and the switchable lens is moved by 1 / a pitch in synchronism therewith, thereby realizing a 3D image of the same resolution as the 2D image .

Further, since there is no part of the parallax barrier which is the same as the barrier of the parallax barrier, there is no reduction in brightness due to 2D and 3D conversion.

Hereinafter, the effect of improving the resolution will be described by way of example with reference to the two-view case with reference to the luminance drop according to the conventional barrier system.

9A is an exemplary diagram schematically showing the driving of the stereoscopic image display apparatus according to the first embodiment of the present invention in the first frame.

FIG. 9B is an exemplary diagram schematically showing the driving of the stereoscopic image display apparatus according to the first embodiment of the present invention in the second frame.

9A, for example, in the first frame, the stereoscopic image display apparatus according to the first embodiment of the present invention displays left eye images on odd columns of the image panel 140, Are displayed on the even columns of the video panel 140. That is, in the first frame, the odd columns of the image panel 140 are defined as a left eye pixel L, and the even columns of the image panel 140 are defined as a right eye pixel R. [

9B, for example, in the second frame, the stereoscopic image display apparatus according to the first embodiment of the present invention displays the left eye image on the even columns of the image panel 140, The image is displayed on the odd columns of the image panel 140. That is, in the second frame, the even columns of the image panel 140 are defined as a left eye pixel L and the odd columns of the image panel 140 are defined as a right eye pixel R. [

Then, the liquid crystal lens 110 is sequentially time-divisionally driven in accordance with left and right eye images alternately displayed on a set of odd and even columns of the image panel 140 for each frame, So that it is possible to realize the non-spectacle 3D without degrading the resolution.

For example, in the first frame, the left eye image viewed by the left eye is an image having a 1/2 resolution versus a 2D resolution. However, in the second frame, an adjacent image having the remaining half resolution can be viewed, And recognizes an image having the same resolution as 2D. Likewise, the right eye recognizes the right eye image of the same resolution as the 2D contrast, and as a result, the 3D image same as the 2D resolution can be seen in the 3D implementation.

FIGS. 10A and 10B are exemplary views illustrating a left eye image and a right eye image in a first frame through a liquid crystal lens according to a first embodiment of the present invention.

11A and 11B are views showing an example of a left eye image and a right eye image which are viewed through a liquid crystal lens according to the first embodiment of the present invention in a second frame.

Referring to FIGS. 10A and 10B, for example, in the first frame, a first left eye image 150L1 'and a first right eye image 150R1' each having a 1/2 resolution are viewed.

11A and 11B, for example, in the second frame, a second left eye image 150L2 'and a second right eye image 150R2' each having a resolution of 1/2 are obtained, The left and right eye images 150L1'150L2 ', 150R1', and 150R2 'having the same resolution can be seen.

That is, the first left eye image 150L1 'viewed by the left eye in the first frame is an image having a 2D contrast and a 1/2 resolution but the adjacent image of the remaining 1/2 resolution in the second frame, that is, the second left eye image 150L2' 'So that the first and second left eye images 150L1' and 150L2 'of the two frames are combined to recognize an image having the same resolution as the 2D image. Likewise, the right eye recognizes the first and second right-eye images 150R1 'and 150R2' having the same resolution as that of 2D, so that 3D images identical to the 2D resolution can be seen in the 3D implementation.

While a great many are described in the foregoing description, it should be construed as an example of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

110: liquid crystal lenses 125, 225, 325:
140, 240, 340: image panels I1, I2, I3, I4:
V1, V2, V3, V4: image pixels

Claims (14)

(N is a natural number of 3 or more) are sequentially arranged so that the first to the n-th images of 60 Hz are displayed, A display panel for displaying the first through n-th images alternately for each frame; And
A liquid crystal lens which is disposed between the image panel and the user and is driven according to a voltage applied thereto to function as a lens and synchronizes with the time division driving of the image panel so that the profile of the lens surface in the next frame is shifted by 1 / / RTI >
Wherein the lens surface has a pitch equal to a length of one view set including one of the first to n-th image pixels. The stereoscopic image display device of claim 1, wherein the image panel is one of a liquid crystal display device, an organic light emitting display device, an electroluminescent display device, a plasma image display device, and an electroluminescent display device. The liquid crystal display device according to claim 1, wherein the liquid crystal lens comprises a first substrate, a second substrate, and a liquid crystal layer provided between the first substrate and the second substrate, wherein the two- A stereoscopic image display device which emits an image. The liquid crystal display device according to claim 3,
A first electrode provided on the inner side of the first substrate;
A plurality of second electrodes disposed on an inner surface of the second substrate so as to be spaced apart from each other with an insulating layer interposed therebetween; And
And a voltage source for applying different voltages (Vmin, V1, V2, ..., Vmax) to the plurality of second electrodes. A method of driving a stereoscopic image display device including a video panel for displaying an image, and a liquid crystal lens disposed between the video panel and a user, the liquid crystal lens being driven according to a voltage applied thereto,
The first through n-th image pixels realizing an n-view (n is a natural number of 3 or more) are sequentially and repeatedly arranged in the image panel so that the first through n-th images of 60 Hz are a And synchronizing with the time division driving of the image panel to move the profile of the lens surface of the liquid crystal lens by 1 / a pitch in the next frame with respect to the previous frame,
Wherein the lens surface has the same pitch as the length of one view set of one of the first to n-th image pixels. The method of claim 5, wherein, when the 3D image of the n-view is implemented by the image panel having the resolution of M x N, the 3D resolution using the a × 60 Hz image panel and the liquid crystal lens driving at a × 60 Hz (M x N) x a x (1 / n) times. The liquid crystal display device according to claim 6,
A first substrate and a second substrate;
A first electrode provided on the inner side of the first substrate;
A liquid crystal layer provided between the first substrate and the second substrate;
A plurality of second electrodes disposed on an inner surface of the second substrate so as to be spaced apart from each other with an insulating layer interposed therebetween; And
And voltage sources for applying different voltages Vmin, V1, V2, ..., Vmax to the plurality of second electrodes. 8. The method of claim 7, wherein a first voltage (Vmin) corresponding to a threshold voltage is applied to the second electrode located at the center of the lens region,
The second n-th voltage Vmax is applied to the second electrode located at the edge of the lens region,
The plurality of second electrodes located between the center and the edge of the lens region are provided with a value gradually increasing from the first voltage (Vmin) to the n-th voltage (Vmax) A method of driving a stereoscopic image display device to which a voltage is applied. The method according to claim 6, wherein, in the case of a 4-view driven at 120 Hz, images of 60 Hz are alternately displayed on the image panel for each 2 (a) frames of the first and second frames, A method for driving a stereoscopic image display apparatus which repeatedly emits first, second, third, and fourth images. The method of claim 9, wherein in the second frame, the liquid crystal lens is shifted by 1 / a, that is, by 1/2 pitch in synchronization with the time division driving of the image panel, and the third, fourth, And outputs the image signal to the stereoscopic image display apparatus. The method as claimed in claim 6, wherein, in the case of a 4-view driven at 240 Hz, images of 60 Hz are alternately displayed for each frame of 4 (a) first, second, third and fourth frames on the image panel, And the first, second, third, and fourth images are repeatedly output in order in the first frame. 12. The method according to claim 11, wherein in the second frame, the liquid crystal lens is moved by 1 / a, that is, 1/4 pitch in synchronism with the time division driving of the image panel to sequentially form fourth, first, And outputs the image signal to the stereoscopic image display apparatus. The method of claim 12, wherein in the third frame, the liquid crystal lens is moved by 1/4 pitch again in synchronization with the time division driving of the image panel, and the third, fourth, first and second images are repeated in order A method of driving a stereoscopic image display apparatus which emits light. 14. The method of claim 13, wherein in the fourth frame, the liquid crystal lens is moved by 1/4 pitch again in synchronization with the time division driving of the image panel, and the second, third, fourth, A method of driving a stereoscopic image display apparatus which emits light.

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