KR101104172B1 - The method of eliminated from moire and apparatus for stereoscopic image - Google Patents

Abstract

The present invention relates to a three-dimensional image display device and a method of removing the moire, and in particular, it is possible to display a 2D image / three-dimensional image at the same time, and to display only a specific portion of the screen as a three-dimensional image. In order to achieve the above object, the present invention provides a liquid crystal unit 210 for forming a barrier pattern according to a display control method, and each of segment terminals S1 to S11 corresponding to each of the vertical cell columns of the liquid crystal unit 210. It is connected to each of the comb-on terminals C1 to C13 corresponding to each of the horizontal cell columns of the liquid crystal unit 210, and the segment terminals to be driven or the comb-on terminals to be driven are divided into odd and even numbers according to a display control method. The liquid crystal driver 220 and 230 to sequentially turn on / off and recognize a setting of a stereoscopic image full screen mode or a stereoscopic image partial screen mode by an input device (not shown), and a display control method according to the recognition result. The control unit 240 is configured to control the driving of the first liquid crystal driver 220 and the second liquid crystal driver 230 according to the configuration. Therefore, in the formation of a barrier pattern for displaying a stereoscopic image on the whole or part of the display screen, the present invention has an effect of eliminating the moiré phenomenon occurring in the conventional apparatus by sequentially turning on / off adjacent barriers.

Stereoscopic image, barrier pattern, moire

Description

Stereoscopic display device without moiré and method thereof {THE METHOD OF ELIMINATED FROM MOIRE AND APPARATUS FOR STEREOSCOPIC IMAGE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display technology, and more particularly, to a stereoscopic image display apparatus and a method for removing a moire for displaying a stereoscopic image of a predetermined size simultaneously with a 2D image.

Advances in information and communication technology have enabled multimedia services that support two-dimensional video and voice to digital terminals that process text, voice, and video at high speeds. It is expected to develop.

In general, a three-dimensional image representing a three-dimensional image is made by the principle of stereo vision through two eyes.

An important factor of the three-dimensional effect is the parallax of binocular disparity, or binocular disparity, which appears because the human eyes are about 65 mm apart. Therefore, the left and right eyes see different two-dimensional images, and when the two images are transmitted to the brain through the retina, the brain fuses with each other to reproduce the depth and reality of the original three-dimensional image. This is commonly referred to as stereography.

The stereoscopic image display apparatus is largely classified into a stereoscopic stereoscopic image display apparatus and an autostereoscopic stereoscopic image display apparatus according to whether glasses are worn.

Spectacular stereoscopic image display apparatus must bear the inconvenience of observer wearing special glasses.

However, since the autostereoscopic 3D display device can feel a 3D image displayed directly on the screen without wearing the above-described glasses, it is possible to solve the disadvantage of the spectacle type 3D display device. An autostereoscopic 3D display device is largely classified into a lenticular device and a parallax-barrier device.

An operation of a stereoscopic image display device according to a conventional parallax-barrier method will be described with reference to FIGS. 1A and 1B. In the conventional parallax-barrier stereoscopic image display device, the left image L and the right image R facing the vertical direction (yy 'direction in FIG. The display module 10 alternately disposed in the direction xx 'of FIG. 1B), and a bar-shaped barrier layer facing the vertical direction called a barrier 20 at the front end thereof. In the 3D image display device, the display module 10 and the barrier 20 are disposed such that light corresponding to the left image L is incident only to the left eye, and light corresponding to the right image R is incident only to the right eye. In this way, the two left and right images (L, R) divided by the two observations are separately observed.

Therefore, in the conventional method, since the barrier is formed in the form of a vertical bar at the same time, there is a problem of partially blocking the light source coming from the display screen, thereby significantly reducing the original brightness of the display.

In addition, conventionally, due to spatial overlap between the image formed by the display module and the barrier, which is a periodic pattern, interference occurs with each other, thereby causing a problem of deteriorating image quality.

In order to solve the above problems, the present invention can simultaneously or display 2D image / stereoscopic image, as well as moire generated during stereoscopic image display by alternately driving adjacent barrier patterns every predetermined period when displaying stereoscopic images. SUMMARY OF THE INVENTION An object of the present invention is to provide a stereoscopic image display device and a method of removing a moire created to remove a pattern.

The present invention provides a parallax-barrier stereoscopic image display apparatus capable of selectively displaying a 2D image and a stereoscopic image in order to achieve the above object, the input screen for setting the stereoscopic image screen mode / 2D image screen mode And a display device for displaying an image of the currently set screen mode, and liquid crystal cells arranged in a matrix form, and in a horizontal or vertical direction by a predetermined display control method corresponding to the input information of the input screen. The liquid crystal unit driving the cell column to form a barrier pattern, and the entire (4n + 1) th liquid crystal cell column and the (4n + 3) th liquid crystal cell with respect to the liquid crystal cell column of the liquid crystal cell unit according to a display control method set by a user. Turn the entire column on or off in half a cycle of the reference clock, or each of the (4n + 1) th and (4n + 3) th column columns, where n is 0 , An integer of 1, 2, 3, ...) and a liquid crystal drive unit for driving the liquid crystal cell column of the liquid crystal unit by sequentially turning on / off at a half cycle of a reference clock, And a polarizing film unit for visualizing a barrier pattern formed on the government, and setting the stereoscopic image screen mode by a user's key input, displays the input screen on the display device, and determines the input information of the input screen. And a controller for controlling the liquid crystal driver to form a barrier pattern corresponding to an area of a 3D image screen.

The display device may be composed of TFT-LCD, organic EL, FED, PDP and the like.

In addition, the present invention in the stereoscopic image display method for displaying a 2D image and a stereoscopic image simultaneously or respectively on the display screen in order to achieve the above object, determining whether the stereoscopic image screen mode is set, and the input image screen mode is set Determining a display control method corresponding to the input image screen mode, and simultaneously displaying a stereoscopic image on the display screen according to the determined display control method.

And turning on / off adjacent barriers among the barriers corresponding to the stereoscopic image screen in a time-division manner to remove moiré patterns occurring during stereoscopic image display.

As described in detail above, in the present invention, in displaying a stereoscopic image on the whole or a part of the screen, the moiré generated during stereoscopic image display by turning on or off adjacent barrier patterns at predetermined intervals or alternately turning on and off adjacent barrier patterns at predetermined intervals, respectively. There is an effect that can remove the pattern.

In addition, the present invention can simplify the manufacturing difficulty by time-dividing the adjacent barrier pattern on and off sequentially so that the size of the liquid crystal cell for forming the barrier pattern may be different from or the same as that of the adjacent liquid crystal cell. Of course, there is an effect that can reduce the production cost.

Hereinafter, the present invention will be described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings for the detailed description of the present invention are provided to enable those skilled in the art to easily understand the present invention, and the present invention should not be limited to the accompanying drawings. Like reference numerals in the accompanying drawings denote like elements.

As shown in the block diagram of FIG. 2, the stereoscopic image display device according to an exemplary embodiment of the present invention is composed of a plurality of liquid crystal cells arranged in a horizontal and vertical direction to have a matrix structure. A liquid crystal unit 210 in which a cell column or a cell column in a horizontal direction is driven in whole or in part to form a barrier pattern;

A plurality of driving terminals are connected to each of the segment terminals S1 to S11 corresponding to each of the vertical cell columns of the liquid crystal unit 210 in the segment terminals S1 to S11, and the segment in the case of a vertical stereoscopic image screen. Terminals S1 to S11 are turned on / off for the entire (4n + 1) th segment terminal and the entire (4n + 3) th segment terminal at 1/2 cycles of the reference clock, or the (4n + 1) th segment terminal. Each of the (4n + 3) th segment terminals (where n is an integer of 0, 1, 2, 3, ...) is sequentially turned on / off at a half cycle of the reference clock to form the liquid crystal unit ( A plurality of driving terminals are respectively provided in the first liquid crystal driver 220 for selectively driving the liquid crystal cell column of the 210 and the comb-on terminals C1 to C13 respectively corresponding to the horizontal cell columns of the liquid crystal part 210. In the case of a horizontal stereoscopic video screen, the reference clock is clocked for all of the (4n + 1) -th comb terminals and all of the (4n + 3) -th comb terminals. Turn on / off in 1/2 cycle of or reference each of the (4n + 1) th comb-on terminals and each of the (4n + 3) th comb-on terminals, where n is an integer equal to 0,1,2,3, ... A second liquid crystal driver 230 for selectively driving the liquid crystal cell column of the liquid crystal unit 210 by sequentially turning on / off at a half cycle of a clock;

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Recognizes the setting of the stereoscopic image full screen mode or the stereoscopic image partial screen mode by an input device (not shown), and the stereoscopic image partial screen on the screen of the display device (not shown) when the stereoscopic image partial screen mode is set. A display screen for setting a display area of the display panel; and determining a display control method by determining the recognized setting mode and input information of the input screen, and determining the display control method according to the determined display control method. It comprises a control unit 240 for controlling the driving of the second liquid crystal driver 230.

The input device (not shown) includes at least one of input devices such as a mouse, a keyboard, or a touch pad of a touch screen.

13 * 11 of the liquid crystal unit 210 is for clarity to explain the operation of the present invention, the present invention is not limited thereto.

The liquid crystal unit 210 includes a liquid crystal panel such as a TN-LCD, a STN-LCD, a TFT-MONO, and the size of the plurality of liquid crystal cells constituting the liquid crystal panel is the same size as the adjacent liquid crystal cell or a different size. It may be configured as.

The control method of forming a barrier in the vertical direction in the liquid crystal part 210 is a method of driving all or part of the odd-numbered segment terminals S1, S3, S5,... And the whole of the comon terminals C1 to C13. .

The control method of forming a horizontal barrier in the liquid crystal part 210 is a method of driving all or part of the odd-numbered comon terminals C1, C3, C5,..., And the entire segment terminals S1 to S11.

Therefore, when displaying the 2D image, the controller 240 controls driving of the first liquid crystal driver 220 and the second liquid crystal driver 230 so that a barrier pattern is not formed in the liquid crystal unit 210, and displays a stereoscopic image. In this case, the barrier pattern is formed on the liquid crystal part 210 according to the currently determined display control method so that the (4n + 1) and (4n + 3) th terminals are sequentially formed at 1/2 cycles of the reference clock. The moiré pattern is removed by controlling the driving of the second liquid crystal drivers 220 and 230.

In other words, in the vertical stereoscopic image, as shown in the exemplary diagram of FIG. 3, a segment terminal corresponding to the (4n + 1) and (4n + 3) th liquid crystal cell columns in the horizontal direction of the liquid crystal unit 210 is shown. Moiré pattern is eliminated by driving the first liquid crystal driver 220 such that S1, S3, S3, ... are sequentially driven every 1/2 cycle of the reference clock.

That is, the process according to the present invention will be described in detail with reference to the waveform diagrams of FIGS. 4 to 6 as follows.

That is, in the vertical stereoscopic image, as shown in the waveform diagram of FIG. 4, the controller 240 is connected to the (4n + 1) and (4n + 3) th liquid crystal cell columns in the horizontal direction of the liquid crystal unit 210. While driving the first liquid crystal driver 220 such that the corresponding segment terminals S1, S3, S3,... Are sequentially driven every 1/2 cycle of the reference clock, the liquid crystal unit 210 of the liquid crystal unit 210 is driven. The moire fringe is removed by driving the second liquid crystal driver 230 to drive the whole of the comb terminals C1, C2, C3,... Corresponding to the vertical liquid crystal cell column.

On the contrary, in the horizontal stereoscopic image, the control unit 240 is connected to the (4n + 1) and (4n + 3) th liquid crystal cell columns in the vertical direction of the liquid crystal unit 210 as shown in the waveform diagram of FIG. 5. While driving the second liquid crystal driver 230 so that the corresponding comb terminals C1, C3, C3, ... are sequentially driven every 1/2 cycle of the reference clock, the liquid crystal unit 210 The moire fringe is removed by driving the first liquid crystal driver 230 to drive the entirety of the segment terminals S1, S2, S3,..., Corresponding to the horizontal liquid crystal cell column.

On the other hand, in the case of displaying a three-dimensional image in the vertical or horizontal direction, the operation of sequentially turning on / off the odd-numbered segment terminal or the odd-numbered comb terminal at 1/2 cycle of the reference clock has been described. As shown in the figure, the odd-numbered segment terminal is divided into (4n + 1) th and (4n + 3) th terminals to be alternately turned on / off to remove the interference between the image and the periodic barrier pattern. You can also remove it.

In addition, even when the display screen (not shown) is rotated 90 degrees in the same manner as the waveform diagram of FIG. 6, the generation of moire fringes can be eliminated.

In addition, the present invention can be immediately applied to display devices such as TFT-LCD, organic EL, PDP, FED, etc. to realize stereoscopic images.

Therefore, by designing the barrier to be switched in a horizontal / vertical direction rather than in one direction, displaying a stereoscopic image displayed in a vertical direction as well as a stereoscopic image displayed in a horizontal direction with respect to a screen of a display device (not shown) may be displayed. Of course, the moiré pattern can be removed by controlling the formation of the barrier pattern in time.

On the other hand, the embodiments of the present invention described above are intended to explain those skilled in the art to fully understand and practice the present invention, those skilled in the art will recognize that the present invention is not limited to the scope of the above-described embodiments. Accordingly, those skilled in the art will recognize that various modifications to the embodiments of the present invention are possible, and that other embodiments are possible without departing from the spirit or scope of the present invention.

1A is a cross-sectional view of a stereoscopic image display device using a conventional parallax-barrier.

1B is a perspective view of a stereoscopic image display device using a conventional parallax-barrier.

2 is a structural diagram of a stereoscopic image display device according to the present invention;

3 illustrates time division segment terminal driving in an embodiment of the invention.

4 to 6 are waveform diagrams for generating a barrier pattern in an embodiment of the present invention.

[Description of Drawings]

210: liquid crystal unit 220, 230: liquid crystal drive unit

240: control unit

Claims (4)

In the parallax-barrier stereoscopic image display device which can selectively display 2D image and stereoscopic image, Liquid crystal means for forming a barrier pattern according to a display control method; Segment terminals to be connected to each of a plurality of segment terminals corresponding to each of the vertical cell columns of the liquid crystal means and to a plurality of comb terminals corresponding to each of the horizontal cell columns of the liquid crystal means, Liquid crystal driving means for turning on and off the comb-on terminals to be driven in odd and even numbers; A control means for recognizing setting of a stereoscopic image full screen mode or a stereoscopic image partial screen mode by an input device (not shown), and controlling driving of the liquid crystal driving means according to a display control method according to the recognized screen mode; Three-dimensional image display device is removed moire characterized in that it comprises a. The liquid crystal cell of claim 1, wherein the control means recognizes the stereoscopic image display mode, and the entire (4n + 1) th liquid crystal cell column and the (4n + 3) th liquid crystal cell column of the liquid crystal cell column for forming the barrier pattern of the mode. And controlling the liquid crystal driving means to turn on / off at 1/2 cycles of a reference clock. Where n is an integer equal to 0,1,2,3, ... The liquid crystal cell of claim 1, wherein the control unit recognizes each of the (4n + 1) th liquid crystal cell columns and the (4n + 3) th liquid crystal cell columns of the liquid crystal cell column to form a barrier pattern in the mode when the control unit recognizes the stereoscopic image display mode. And controlling the liquid crystal drive means to alternately turn on / off one by one. Where n is an integer equal to 0,1,2,3, ... In the stereoscopic image display method for displaying a 2D image and a stereoscopic image simultaneously or separately on a display screen, Determining whether a stereoscopic image mode is set; Determining a display control method corresponding to the input video screen mode when the input video screen mode is set; Simultaneously displaying stereoscopic images on the display screen according to the determined display control method Simultaneously displaying a stereoscopic image on a display screen according to the determined display control method, and dividing barriers corresponding to the stereoscopic image screen into odd-numbered and even-numbered on / off in a time division manner. 3. The three-dimensional image display method of removing the moire, characterized in that configured to remove the moiré pattern generated.

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