KR101958288B1 - 3D image display device - Google Patents

Abstract

The present invention provides a display device comprising: a first display element (PN1); (PIC1) and a second image (PIC2), and a second display element (PN2) provided on the first display element and spaced apart from the first display element by a first distance. The first image PIC1 is output to the second display element PN2 for the pixel region to which the image information different from the pixel region of the second image PIC2 is applied, Which outputs a full white to the second display element PN2 and removes the image outputted from the second display element PN2 in the second image PIC2 to output to the first display element PN1, A video display device is provided.

Description

[0001] The present invention relates to a three-dimensional image display device,

The present invention relates to a 3D image display apparatus, and more particularly, to a 3D image display apparatus in which a depth sensing stereoscopic image is expressed by two or more different image implementations having different distances to a user.

In recent years, there has been developed a display device capable of displaying 3D images in response to the increase in demands of users for a display device having stereoscopic characteristics and capable of expressing more realistic images, that is, a 3D display device.

Generally, a stereoscopic image expressing a 3D image is made by the principle of stereoscopic vision through two eyes. The binocular disparity which appears because the time difference of the two eyes, that is, the two eyes is about 65 mm apart, A liquid crystal display device capable of displaying stereoscopic images has been proposed.

In a more detailed description of the 3D implementation, the left and right eyes viewing the display each see a different 2D image, and when the two images are transmitted to the brain through the retina, the brain fuses them exactly together, The sense and the real feeling are reproduced. Such a phenomenon is usually referred to as stereography.

As a technique for displaying a 3D image in a device for displaying a 2D image such as a liquid crystal display device, a 3D image display method using special glasses and a non-eye-tight 3D image display method are typical.

The 3D image display system using the double special glasses can be generally divided into a polarizing glasses system using a vibration direction or a rotation direction of polarized light and a time division spectacle system alternately presenting alternating left and right images.

In the 3D image display system, the parallax barrier system allows images to be separately viewed through a vertical grid aperture in front of each of the images in the right and left eyes, and a lenticular method using a lenticular plate in which cylindrical lenses are arranged in a stripe form.

However, in the 3D image display apparatus having the above-described characteristics, there is a problem that the resolution, the brightness or the view area is restricted when viewing 3D.

That is, since the 3D image display device using the special glasses needs to produce images for the left eye and the right eye through one 2D display device, the resolution is lowered when the polarizing glasses are used, and the luminance is lowered when the time- In the case of the parallax barrier method in the non-eyeglass system, there arises a problem of reduction in resolution, luminance, and further limitation of the number of view areas. In the case of the lenticular system, the number of view areas is limited There is a problem that the resolution is changed depending on whether it is opened.

Accordingly, unlike the 3D image display apparatus described above, there is no need for a new type of 3D image display apparatus which has no resolution and luminance degradation and is not limited in the number of view areas.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel 3D image display apparatus which has no luminance and resolution degradation and is free from a view area limitation.

According to an aspect of the present invention, there is provided a 3D image display apparatus including a first display element (PN1); (PIC1) and a second image (PIC2), and a second display element (PN2) provided on the first display element and spaced apart from the first display element by a first distance. The first image PIC1 is output to the second display element PN2 for the pixel region to which the image information different from the pixel region of the second image PIC2 is applied, Which outputs a full white to the second display element PN2 and removes the image outputted from the second display element PN2 in the second image PIC2 to output to the first display element PN1, A video display device is provided.

At this time, a plurality of third display elements having a second gap may be further provided between the first display element and the second display element.

It is preferable that the first and second intervals are 0.5 to 2 cm, respectively.

Each of the first, second and third display elements is a liquid crystal panel comprising an array substrate, a counter substrate, and a liquid crystal layer interposed between the two substrates. A first polarizer attached to the back surface of the first display element; A second polarizer attached to a front surface of the second display element and having a transmission axis perpendicular to the first polarizer; And a backlight unit provided on an outer surface of the first polarizer.

Each of the array substrates of the first, second and third display elements intersects with each other to define a pixel region, a thin film transistor connected to the gate wiring and the data wiring, a drain electrode of the thin film transistor, And a color filter layer in which red, green and blue color filter patterns are sequentially and repeatedly formed corresponding to each pixel region is formed on an opposing substrate of the second display element.

A color filter layer may be formed on each of the opposing substrates of the first and third display devices so that red, green, and blue color filter patterns are sequentially repeated in correspondence with the respective pixel regions.

The common electrode may be formed on the inner surface of the counter substrate or may be alternately formed on the inner surface of the array substrate with the pixel electrode, Or the pixel electrode and the insulating layer are formed on the array substrate. In this case, the common electrode or the pixel electrode includes a plurality of bar-shaped openings for each pixel region.

According to an embodiment of the present invention, there is provided a method of 3D image display of a 3D image display device, the method comprising: applying first and second images; Wherein the first image and the second image are compared with each other in a pixel region so as to implement full white in the second display element for the same pixel region to which the same image information is applied, 1 image; And removing the image formed on the second display element in the second image to implement the removed image on the first display element.

A 3D image realizing method of a 3D image display apparatus according to another embodiment of the present invention is the 3D image realizing method of the 3D image display apparatus according to any one of claims 2 to 8, , Applying three images (PIC1, PIC2, PIC3); Wherein the second display device is provided with the first display device for the pixel area to which the image information different from the pixel area of the second image (PIC2) and the third image (PIC3) among the pixel areas of the first image (PIC1) And outputs a full white image to the second display element for a pixel region that is not the first image PIC1 and an image output from the second display element PIC2 to the second display element, (TP1); The first deformed image TP1 is output to the third display element for the pixel region to which the image information different from the pixel region of the third image PIC3 is applied among the pixel region of the first deformed image TP1 And outputs a full white image to the third display element for a pixel region which is not the first display image and removes an image outputted to the second display element and the third display element from the third image PIC3, ≪ / RTI > And outputting the second deformed image TP2 to the first display element.

The three-dimensional display device according to the present invention is configured to superimpose two or more liquid crystal panels having a predetermined spacing interval, thereby realizing images with different distances, thereby allowing a user to view stereoscopic 3D images.

Therefore, the 3D image display device according to the embodiment of the present invention has substantially no luminance and resolution deterioration, and furthermore, it is possible to provide a 3D image display device which is free from the need for special glasses (polarized glasses or time- There is an advantage that the viewing range of the 2D image does not exist and the viewing range of the 3D image is all the range.

FIG. 1 is a simplified conceptual view of a 3D image display device according to the present invention, which realizes a 3D image by expressing depth by using a display device having a different distance to a viewer.
2 is a sectional view of a 3D image display apparatus according to a first embodiment of the present invention;
3 is a sectional view of a 3D image display apparatus according to a modification of the first embodiment of the present invention.
4 is a cross-sectional view of a 3D image display apparatus according to a second embodiment of the present invention.
5 is a sectional view of a 3D image display apparatus according to a modification of the second embodiment of the present invention.
FIG. 6 is a flowchart illustrating a method of implementing an image of a 3D image display apparatus according to a second embodiment of the present invention including three display elements and a modified example thereof; FIG.

Hereinafter, a 3D image display apparatus according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a simplified conceptual diagram of a 3D image display apparatus according to the present invention, which realizes a 3D image by expressing depth by using a display device having a different distance to a viewer.

As shown in the drawing, the 3D image display apparatus 100 according to the present invention is composed of two or more 2D display elements PN1 and PN2 that respectively display 2D images. At this time, the 2D display device is preferably a liquid crystal panel.

More specifically, the configuration of the 3D image display apparatus 100 according to the present invention will be described.

The first display device PN1 is located at a first distance d1 with respect to the user and is provided with a first display device PN1. The first display device PN1 is spaced apart from the first display device PN1 by a predetermined distance , And the second display element (PN2) is located at a second distance (d2) smaller than the first distance (d1) with respect to the user.

Each of the first and second display elements PN1 and PN2 is a liquid crystal panel in which a liquid crystal layer (not shown) is interposed between an array substrate (not shown) and a counter substrate (not shown) The back surface of the first display element PN1 and the front surface of the second display element PN2 are provided with first and second polarizing plates (not shown) having transmission axes perpendicular to each other.

In addition, a backlight unit (not shown) including a light source is provided on the back surface of the first display element PN1, more precisely on the outer surface of the first polarizer plate (not shown).

Although not shown in the figure, the first and second display elements PN1 and PN2 are provided with a printed circuit board on which a driver having driving circuits for driving the first and second display elements PN1 and PN2 is integrated, And a gate driving circuit unit, a receiving unit for decoding the input video signal, a memory unit, a control unit, and a timing control unit.

Although the 3D image display device 100 includes the first and second display elements PN1 and PN2 in the drawing, the first and second display elements PN1 and PN2 may be disposed between the first and second display elements PN1 and PN2. A plurality of third display elements PN3 may be further provided and a plurality of third display elements PN3 may be disposed on the same liquid crystal panel as the first and second display elements PN1 and PN2 .

With this configuration, the user views the image displayed from the first display element PN1 and the third display element PN3 through the second display element PN2, and at the same time, the second display element PN2 itself And also the image displayed from the display device.

That is, when the third display element PN3 is provided together with the image from the first display element PN1, the user can select the image from the second display element PN2 in addition to the image from the third display element PN3 And the image from which the image has been superimposed is viewed.

Therefore, the first display element PN1, the second display element PN2, and the third display element PN3 are different in distance from each other when the user is referred to, Two or more images from the third display element PN3 in addition to the elements PN1 and PN2 overlap each other to have a three-dimensional depth sense and can display a displayed final image.

That is, since the image from the first display element PN1 and the image from the third display element PN3 and the image from the second display element PN2 have different depth perceptions, So that 3D images with a three-dimensional appearance can be seen.

As the number of the third display elements PN3 located between the first and second display elements PN1 and PN2 increases, the sense of depth of the image is more reflected in various depths of feeling among components such as objects appearing in the image However, if the number of the third display elements PN3 positioned between the first and second display elements PN1 and PN2 increases, the spacing between the first display element PN1 and the second display element PN2 .

In this case, it has been experimentally found that when the first display element PN1 and the second display element PN2 have a too large spacing distance, the stereoscopic effect expression is lowered. In the 3D image display device 100 according to the present invention, It is preferable that the number of display elements including the first and second display elements PN1 and PN2 to represent a 2D image is about 2 to about 5 in order to realize a proper 3D image with depth.

FIG. 2 is a cross-sectional view of a 3D image display apparatus according to a first embodiment of the present invention, and FIG. 3 is a cross-sectional view of a 3D image display apparatus according to a modification of the first embodiment of the present invention. In this case, for convenience of explanation, FIG. 3 is given the reference numerals by adding 2 to the same constituent elements in the first and second display elements shown in FIG.

As shown, the 3D image display apparatus according to the first embodiment and the modification of the present invention is characterized by being composed of the first display element PN1, the second display element PN2, and the backlight unit 198 .

In this case, the first and second display elements PN1 and PN2 are all formed of a liquid crystal panel. In a modification of the first embodiment, except for the presence or absence of the formation of the color filter layer, the structure of the liquid crystal panel itself is substantially the same The configuration of the second display element PN2 will be mainly described, and the first display element PN1 will be described mainly with respect to a portion having a different point.

The second display element PN2 includes an array substrate 112 and a counter substrate 152 and a first liquid crystal layer 182 interposed between the two substrates 112 and 152.

Although not shown in the figure, the array substrate 112 includes gate wirings (not shown) and data wirings (not shown) that define a plurality of pixel regions P to intersect with each other, and two wirings (not shown) And a thin film transistor (not shown) is provided as a switching element corresponding to each pixel region P, and each pixel region P is connected to the thin film transistor (not shown) and includes a pixel electrode 122 have.

The counter substrate 152 is provided with a color filter layer 162 composed of red, green and blue color filter patterns R, G and B corresponding to the pixel regions P in order and repetitively, And a common electrode 172 is provided on the entire surface.

The counter substrate 152 is provided with a black matrix (not shown) for suppressing the transmission of light to the boundaries of the red, green and blue color filter patterns R, G and B and more precisely at the boundaries of the pixel regions P ) Are further provided.

The internal structure of the second display element PN2 including these components may be variously modified according to the driving mode thereof.

Although the common electrode (not shown) is formed on the entire inner surface of the counter substrate 152 in the first embodiment of the present invention, the common electrode (not shown) provided on the front surface of the counter substrate 152 172 may be omitted in the counter substrate 152 and may alternatively be formed in each pixel region P of the array substrate 112 alternating with the pixel electrode 122. [

In this case, the pixel electrode and the common electrode alternating in each pixel region P form a bar shape, and the second display element PN2 having such a structure has a bar spaced apart from one another. Type pixel electrode and the common electrode.

The common electrode 172 is formed on the entire surface of the display region of the array substrate 112 through an insulating layer (not shown) corresponding to the pixel electrode 122 formed in a plate shape in each pixel region P In this case, a plurality of bar-shaped openings (not shown) corresponding to the pixel regions P are formed in the upper portion of the pixel electrode 122 or the common electrode do.

When the second display element PN2 has such a structure, the pixel electrode 122 and the common electrode (not shown) positioned above and below each other on the array substrate 112 form openings (not shown) Lt; RTI ID = 0.0 > fringe < / RTI >

Between the array substrate 112 and the counter substrate 152 having such a configuration, a liquid crystal layer 182 in which a large number of liquid crystal molecules are arranged in one direction is provided.

In the case of the first embodiment, the first display element PN1 having the same internal configuration as that of the second display element PN2 is provided on the rear surface of the second display element PN2 having such a configuration.

That is, the array substrate 110 and the counter substrate 150 face each other, and a liquid crystal layer 180 is provided between the two substrates 110 and 150. A gate line (not shown), a data line (not shown), a thin film transistor (not shown) and a pixel electrode 120 are provided on the array substrate 110 in the same manner as the second display element PN2. The counter substrate 150 is provided with a color filter layer 160 and a common electrode 170 in the drawing. At this time, the position and shape of the first display element PN1, the common electrode 170, and the shape of the pixel electrode 160 may be deformed like the second display element PN2.

 3, a first display element PN1 having a different point in its internal configuration is provided on the back surface of the second display element PN2 have.

In this case, the color filter layer 160 is provided on the first display element PN2 in the first embodiment of the present invention shown in FIG. 2, but a modification of the first embodiment of the present invention shown in FIG. 3 The color filter layer is omitted in the first display element PN1.

That is, in the first embodiment of the present invention, in the first display element PN1, red, green, and blue color filter patterns R, R, and B corresponding to the pixel regions P are formed on the counter substrate 150, G, and B are sequentially repeated. In a modification of the first embodiment of the present invention, the color filter layer is omitted in the counter substrate 150 of the first display element PN1 . In addition, a black matrix (not shown) formed along the boundary of the pixel region P between the color filter patterns is also omitted.

 In the 3D image display apparatus 100 according to the modification of the first embodiment, the user views the image in a state in which the user finally overlaps the first and second display elements PN1 and PN2 Even if the color filter layer for implementing color is omitted in the first display element PN1, the light transmitted through the first display element PN1 is reflected by the color filter layer 162 provided in the second display element PN2, So that color can be realized.

Therefore, the configuration according to the modified example of the first embodiment in which the color filter layer is omitted from the first display element PN1 will be a more advantageous configuration in the configuration vs. brightness aspect according to the first embodiment.

On the other hand, the first and second display elements PN1 and PN2 having such an internal configuration are preferably spaced apart by a predetermined distance, preferably about 0.5 to 2 cm. The first and second display elements PN1 and PN2 are arranged with a spacing d3 of about 0.5 to 2 cm so that an image realized through the first display element PN1 and the second display element PN2 ), The user perceives a three-dimensional image.

A first polarizer 190 is attached to the outer surface of the first display element PN1 and a second polarizer 195 is attached to the outer surface of the second display element PN2. At this time, the first and second polarizing plates 190 and 195 are arranged to have mutually perpendicular transmission axes.

The backlight unit 198 is provided on the outer surface of the first polarizer 190. The backlight unit 198 includes a light guide plate (not shown) that is mounted on a reflective plate (not shown) of a white or silver color, and a light guide plate (not shown) (Not shown) located on both sides, and a plurality of optical sheets (not shown) interposed between the light guide plates (not shown).

The light source (not shown) may be a fluorescent lamp such as a cold cathode fluorescent lamp or an external electrode fluorescent lamp, or a light-emitting diode (LED) may be used. Be able to

The optical sheet (not shown) includes a diffusion sheet and at least one light condensing sheet, and diffuses or condenses light passing through the light guide plate (not shown) So that a uniform planar light source is incident.

The 3D image display apparatus 100 according to the first embodiment of the present invention having such a configuration and the modified example of the present invention has a configuration in which the first display element PN1 has the farthest The relatively visible components not shown in the first display element PN1 are represented in the second display element PN2 positioned on the front surface of the first display element PN1, The user can view the stereoscopic 3D image.

FIG. 4 is a cross-sectional view of a 3D image display apparatus according to a second embodiment of the present invention, and FIG. 5 is a cross-sectional view of a 3D image display apparatus according to a modification of the second embodiment of the present invention. Here, for convenience of explanation, FIG. 5 shows the same constituent elements in the first, second, and third display elements shown in FIG. 4,

3, the 3D image display apparatus 200 according to the second embodiment of the present invention includes a first display element PN1 and a second display element PN2 and two display elements PN1 and PN2, The first and second polarizing plates 290 and 295 attached to the outer surfaces of the first and second display elements PN1 and PN2 and the first polarizing plate 290 And a backlight unit 298 provided on the outer surface of the backlight unit 298.

Meanwhile, in the case of the 3D image display apparatus 200 according to the second embodiment of the present invention and the modification thereof, one third display element PN3 is provided between the first and second display elements PN1 and PN2 However, a plurality of third display elements PN3 may be provided between the first and second display elements PN1 and PN2 at predetermined intervals. In this case, it is found that the number of the third display elements PN3 is preferably one to three for realizing an appropriate 3D image.

In the 3D image display device 200 according to the second embodiment of the present invention having such a configuration, the configurations of the first and second display elements PN1 and PN2 are the same as those of the first and second embodiments, The third display element PN3 having the same configuration as the second display element PN1 and PN2 of FIG. 2 and further provided between the first and second display elements PN1 and PN2, Or the second display element (PN1, PN2), and the description thereof will be omitted.

On the other hand, in the case of the 3D image display apparatus 200 according to the modification of the second embodiment of the present invention, the difference from the second embodiment is that only in the second display element PN2 disposed closest to the user, A color filter layer 260 is provided on the counter substrate 254 and color filter layers 260 and 260 are formed on the counter substrate 250 and 252 of the first display element PN1 and one or more third display elements PN3. 262 are omitted.

The 3D image display device (200 in FIGS. 2 and 3, 100 in FIGS. 4 and 5) according to the first and second embodiments of the present invention having such a configuration and a modification of each of these embodiments is a conventional 3D image display device The polarizing plate or the polarizing plate for preventing the parallax barrier or the transmission of light is not additionally required, so that the resolution and the luminance are not lowered, and a separate view area is not required Since the 2D image viewing range is the 3D image viewing range as it is, the 3D image viewing range is not limited.

Hereinafter, a 3D image implementation method of a 3D image display apparatus according to embodiments of the present invention having the above-described configuration will be described in more detail.

6 is a flowchart illustrating a method of implementing an image of a 3D image display apparatus according to a second embodiment of the present invention including three display elements and a modification thereof. For the sake of convenience of explanation, images formed of three components are also shown in the flowchart.

First, the first step ST1 is a step of inputting the first, second, and third video signals, respectively.

When the first, second, and third video signals are applied in the first step ST1, the driving unit of the 3D video display device performs the analysis of the first, second, and third video signals applied as the second step ST2 And starts driving.

That is, the first image PIC1 is compared with the second and third images PIC2 and PIC3 to determine whether they are different images or the same image. At the same time, the second image PIC2 and the third image PIC2 PIC3) to determine whether they are the same or different.

In addition to this operation, a first modified image TP1 in a state in which the image OP1 outputted through the second display element PN2 is removed from the second image PIC2 is generated.

That is, in this second step ST2, the comparison is made between the information applied to the first pixel region of each display element in the applied first, second, and third image signals, A comparison judgment is made.

In this case, if the first video signal is different from the second and third video signals, an image according to the first video signal is applied to the second display element PN2.

At this time, for the same portion of the first and second video signals, the second display element PN2 displays full white.

In step ST3, the first modified image TP1 and the third image PIC3 newly generated in the second step ST2 are compared with each other to determine whether they are the same or different. The pixel region is output to an image having a difference through the third display element PN3 and a full white is imposed on a pixel region corresponding to a portion to which the same image information is applied.

 If the first modified image TP1 and the third image PIC3 are different from each other in the third step ST3, the image OP1 outputted from the third image PIC3 to the second display element PN2, A second deformed image TP2 in a state in which the image OP2 outputted to the display element PN3 is removed is generated. Then, the second deformed image TP2 is outputted to the first display element PN1.

By this process, the user respectively inputs images expressing different components to the first, second and third display elements PN1, PN2 and PN3, respectively, so that the user can display the first, second and third display elements PN1 and PN2 And PN3 are simultaneously viewed as a single image. At this time, since the depth difference between the image components implemented in the first, second, and third display elements PN1, PN2, and PN3 is sensed, .

On the other hand, in the case of the first embodiment (see Fig. 2) of the present invention including only the first and second display elements and the modification thereof (see Fig. 3), the first and second video signals are input, Only the second image signal is compared with the signal and the image except for the image signal outputted from the second display element PN2 is directly outputted to the first display element PN1, I will see.

In a case where a plurality of third display elements PN3 are provided between the first and second display elements PN1 and PN2 in the second embodiment (see Fig. 4) and its modification (see Fig. 5) The 3D display method including the third display element PN3 described above is widened to allow the user to view a 3D image having a depth sensation more finely divided among the components represented on the image.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

100: 3D image display device
PN1: first display element
PN2: Second display element
PN3: Third display element

Claims (10)

A first display element PN1;
And a second display element (PN2) spaced apart from the first display element by a first distance,
The first image PIC1 and the second image PIC2 are received,
The first image PIC1 is applied to the second display element PN2 for the pixel region of the first image PIC1 to which the image information different from the pixel region of the second image PIC2 is applied And outputs a full white image to the second display element PN2 with respect to the pixel region which is not yet displayed,
And outputs the image to the first display element (PN1) by removing the image output from the second display element (PN2) in the second image (PIC2).
The method according to claim 1,
And a third display element having a second gap between the first display element and the second display element and further comprising a plurality of third display elements.
3. The method of claim 2,
Wherein the first and second intervals are 0.5 to 2 cm respectively.
3. The method of claim 2,
Wherein each of the first, second, and third display elements is a liquid crystal panel including an array substrate, an opposing substrate, and a liquid crystal layer interposed between the two substrates.
5. The method of claim 4,
A first polarizer attached to the back surface of the first display element;
A second polarizer attached to a front surface of the second display element and having a transmission axis perpendicular to the first polarizer;
The backlight unit provided on the outer surface of the first polarizer,
And the 3D image display device.
5. The method of claim 4,
A gate line and a data line crossing each other and defining a pixel region, a thin film transistor connected to the gate line and the data line, and a pixel connected to the drain electrode of the thin film transistor, Electrode,
And a color filter layer in which red, green, and blue color filter patterns are sequentially and repeatedly formed corresponding to each pixel region is formed on an opposing substrate of the second display element.
The method according to claim 6,
A color filter layer is formed on each of the counter substrates of the first and third display elements so that red, green, and blue color filter patterns are sequentially repeated corresponding to each pixel region.
The method according to claim 6,
A common electrode is further provided inside the first, second and third display elements,
Wherein the common electrode comprises:
A second electrode formed on the inner surface of the counter substrate,
A pixel electrode formed on the inner surface of the array substrate alternately with the pixel electrode,
Or the pixel electrode and the insulating layer are formed on the array substrate. In this case, the common electrode or the pixel electrode is provided with a plurality of bar-shaped openings for each pixel region.
A 3D image realization method of a 3D image display device according to claim 1,
Applying first and second images;
Wherein the first image and the second image are compared with each other in a pixel region so as to implement full white in the second display element for the same pixel region to which the same image information is applied, 1 image;
And removing the image in the second image from the second display element to implement the 3D image in the first display element.
9. A 3D image realization method of a 3D image display device according to any one of claims 2 to 8,
Applying first, second, and third images (PIC1, PIC2, PIC3);
Wherein the second display device is provided with the first display device for the pixel area to which the image information different from the pixel area of the second image (PIC2) and the third image (PIC3) among the pixel areas of the first image (PIC1) Outputs the image PIC1, and outputs a full white image to the second display element for pixel regions which are not yet output,
Generating a first deformed image (TP1) by removing an image output from the second display (PIC2) to the second display element;
The first deformed image TP1 is output to the third display element for the pixel region to which the image information different from the pixel region of the third image PIC3 is applied among the pixel region of the first deformed image TP1 And outputs a full white image to the third display element with respect to a pixel region which is not,
Generating a second deformed image TP2 by removing an image output from the third and fourth display elements PIC3 and PIC3;
And outputting the second deformed image (TP2) to the first display element.

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