KR20080022968A - Variable liquid crystal panel for displaying three dimensional picture and apparatus using the liquid crystal panel - Google Patents

Abstract

A variable LC panel for implementing a 3D(Dimensional) image and a 3D image implementing apparatus using the same are provided to configure an LC panel with LC driving cells arranged in matrix and control driving of the LC driving cells independently, thereby implementing the continuous and natural 3D image even when a direction of a terminal display or a location of an observer is changed. An LC(Liquid Crystal) panel forms a slit for controlling an incident angle or an emission angle of light, outputted from a display(80), by forming an opaque band and a transparent band at constant periods according to whether an electric signal is applied. An LC driving layer of the LC panel is divided into plural LC driving cells arranged in matrix. The LC driving cells are independently driven according to the electric signal. A 3D image implementing apparatus comprises the following parts. A variable LC panel unit(10) variably forms the slit according to a driving signal to be parallel to a short side or a long side of the display. A display direction sensor senses a direction of the display and outputs an image direction notification signal corresponding to the sensed direction. An LC panel controller(30) controls variable formation of the slit by calculating whether the driving signal is applied to each LC driving cell of the variable LC panel unit according to the image direction notification signal. An LC panel driver(20) generates the driving signal according to a control signal from the LC panel controller, and outputs the generated driving signal to the variable LC panel unit.

Description

Variable liquid crystal panel for displaying a three-dimensional image and a stereoscopic image forming apparatus using the variable liquid crystal panel {Variable liquid crystal panel for displaying three dimensional picture and Apparatus using the liquid crystal panel}

1 shows a landscape view and a portrait view of a display.

2 is a block diagram showing a configuration of a stereoscopic image forming apparatus according to the present invention.

3A is a diagram illustrating a structure of a variable type liquid crystal panel according to the present invention in which a plurality of liquid crystal driving cells are divided into a matrix.

3B and 3C are views illustrating the slits for the vertical view and the slits for the horizontal view formed in the variable liquid crystal panel of FIG. 3A, respectively.

4 is a flowchart for explaining an operation of a stereoscopic image forming apparatus of FIG. 2.

5 shows a terminal in which only the display 80 is rotated.

6 is a view showing a state in which the direction of the slit is changed according to the direction of the display.

7 is a view showing an image of the display incident on the observer's eye through the variable liquid crystal panel of the present invention.

8 is a view showing a problem when the observer's position in the left and right directions when the slit is fixed.

9 is a view for explaining the left and right movement of the slit when the observer's position moves in the left and right directions.

10 is a view showing a state in which the slit is moved by driving the liquid crystal drive cell of the present invention.

11 is a view showing a state in which the slit is moved by driving the liquid crystal drive cell of the present invention to the long side or the short side of the display.

12 is a view showing an embodiment in which the moving width of the slit is reduced by overlapping two variable liquid crystal panels of the present invention in a staggered manner.

Fig. 13 is a diagram for explaining the relationship between the positions of the variable liquid crystal panels when the observer moves in the front-back direction.

FIG. 14 is a diagram illustrating an embodiment in which a stereoscopic image may be implemented for only a portion of a display; FIG.

15 is a view showing the structure of a variable liquid crystal panel unit according to another embodiment of the present invention.

16 is a view showing a case in which the variable liquid crystal panel of the present invention is provided between the backlight and the display.

<Description of Symbols for Main Parts of Drawings>

10: variable type liquid crystal panel section 11, 12, 13, 13a, 13b: variable type liquid crystal panel

13 ': superimposed variable liquid crystal panel 14, 15: one-way liquid crystal panel

20 liquid crystal panel driver 30 liquid crystal panel control unit

40: camera 50: observer position detector

60: image information analysis unit 70: backlight

80: display 200, 300: slit

The present invention relates to an apparatus for implementing a stereoscopic image using binocular parallax, and more particularly, to a liquid crystal panel and a liquid crystal panel capable of actively changing a pattern and a position of a slit according to a change in direction of a terminal display and a change in the position of an observer. The present invention relates to a stereoscopic image forming apparatus using a panel.

In general, a binocular parallax type stereoscopic image realization apparatus uses a non-auto stereo scope method for wearing an eyeglass-type device to observe a stereoscopic image, and an autostereoscopic method for observing a stereoscopic image with the naked eye. scope method).

The stereoscopic image implementation method using the autostereoscopic binocular parallax typically includes a method using a lenticular lens sheet and a parallax barrier method.

In the method using the lenticular lens sheet, the lenticular lens sheet is attached to the front surface of the terminal display, and the image is separated into the left and right eyes by using the angle of the lenticular lens. In this method, when observing a general two-dimensional image constituting most of the content, the lens refraction characteristic of the lenticular lens sheet does not realize the two-dimensional image as it is, but the image quality deteriorates, requiring precision or numerical and There is a problem in that distortion, which is difficult to realize image information such as text, appears.

The parallax barrier method does not refract light using the curvature of the lens itself like a lenticular lens sheet to observe a three-dimensional stereoscopic image, but the light output from the display using a slit that forms an opaque band and a transparent band at regular intervals. By controlling the incident angle or the exit angle of the image, the image is separated by the left and right eyes and made incident.

Recently, an opaque band is generated where an electric signal is input and a transparent band is formed where an electric signal is not input. A liquid crystal panel is installed between a display and an observer to form a slit using the liquid crystal panel. The method to introduce is used.

The parallax barrier method using the liquid crystal panel has the advantage that the entire liquid crystal panel is transparent by completely blocking the electrical signal to the liquid crystal panel when the stereoscopic image is not observed. have.

However, since the slit is fixed in position and uses only binocular parallax to separate the corresponding information by the left and right eyes, the slit has a disadvantage in that it is possible to observe a normal stereoscopic image only at a specific angle and position.

That is, when observing a display of a mobile communication terminal, a portable multimedia player (PMP) or a portable computer, as shown in FIG. 1, when the display direction is changed from landscape view to portrait view or portrait view to landscape view, the stereoscopic image cannot be observed. There is a problem that only the left eye image or the right eye image is seen.

In addition, when the observer's position changes from side to side, the natural stereoscopic image area cannot be maintained and only the left eye image or the right eye image is seen, or the left eye image and the right eye image are overlapped, so that the image quality is distorted or the stereoscopic image is reversed. The problem of deteriorating stereoscopic images is when the position of is moved closer or farther away from the display.

Accordingly, an object of the present invention to solve the above-described problem is to improve the structure of the liquid crystal panel and its driving method so that the observer can observe the stereoscopic image continuously without distortion regardless of the change of orientation of the display and the position of the observer. have.

Another object of the present invention is to enable simultaneous observation of two-dimensional images and three-dimensional images on the same display screen.

In the variable liquid crystal panel for realizing a stereoscopic image of the present invention for achieving the above object, when the liquid crystal driving layer of the panel is divided into a plurality of liquid crystal driving cells arranged in a matrix form, the liquid crystal driving cells are respectively in accordance with the electrical signal. It is characterized in that it is driven independently.

In the stereoscopic image forming apparatus using the variable liquid crystal panel according to the present invention, a variable liquid crystal panel unit for forming a slit for controlling the incident angle or the exit angle of light output from the display in parallel to the short side or the long side of the display according to a driving signal. ; Display direction detection means for detecting a direction of the display and outputting an image direction notification signal corresponding to the direction; A liquid crystal panel controller which controls the variable formation of the slit by calculating whether the driving signal is applied to each of the liquid crystal driving cells of the variable liquid crystal panel unit according to the image direction notification signal; And a liquid crystal panel driver for generating the driving signal according to a control signal from the liquid crystal panel controller and outputting the driving signal to the variable liquid crystal panel unit.

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments of the present invention.

In order to realize a stereoscopic image through a flat panel display, binocular, trinocular, and quadruple multi-dimensional stereoscopic image information is alternately arranged on the display pixels. In reality, it is considered that economical use of binoculars is the best. Therefore, in the present embodiment, for convenience of description, a case in which the display uses a binocular system composed of a left eye image and a right eye image will be described.

2 is a block diagram showing a configuration of a stereoscopic image forming apparatus according to the present invention.

The stereoscopic image implementing apparatus of FIG. 2 includes a variable liquid crystal panel unit 10, a liquid crystal panel driver 20, a liquid crystal panel controller 30, a camera 40, an observer position detector 50, an image information analyzer 60, And a backlight 70 and a display 80.

When the variable type liquid crystal panel unit 10 is formed by stacking at least one variable type liquid crystal panel 11, each variable type liquid crystal panel 11 is vertical line slit or horizontal according to a driving signal applied from the liquid crystal panel driver 20. Line slits are variably formed. In this case, each of the variable type liquid crystal panel 11 is formed in a matrix form in which the liquid crystal driving layer is divided into a plurality of cells (hereinafter, referred to as liquid crystal driving cells) as shown in FIG. 3A, and each liquid crystal driving cell is the liquid crystal panel driving unit 20. Independently driven according to the driving signal of the color becomes black or transparent. That is, the liquid crystal driving cell to which the driving signal is applied becomes an opaque color, and the liquid crystal driving cell to which the driving signal is not applied becomes transparent. At this time, since the technology itself for changing the color of each liquid crystal driving cell according to an electrical signal (driving signal) is already known, a detailed description thereof will be omitted.

The liquid crystal panel driver 20 generates a driving signal for forming a slit in the variable liquid crystal panel unit 10 according to a control signal from the liquid crystal panel controller 30 and corresponds to the variable liquid crystal panels 11 to 13 and the corresponding variable type. Output to the liquid crystal drive cells of the liquid crystal panel. That is, the liquid crystal panel driver 20 generates driving signals for independently controlling the driving of the liquid crystal driving cells of the specific variable liquid crystal panels 11 to 13 in the variable liquid crystal panel unit 10. At this time, the variable liquid crystal panels 11 to 13 to be driven and the liquid crystal driving cells of the panels 11 to 13 are determined according to a control signal from the liquid crystal panel controller 30.

The liquid crystal panel control unit 30 drives the respective liquid crystal driving cells of the variable type liquid crystal panel unit 10 according to the observer position signal from the observer position detector 50 and the image direction notification signal from the image information analyzer 60. Slit to control the operation of the variable type liquid crystal driver 10 according to the calculation result so that the slit is always vertical to the variable type liquid crystal panel unit 10 (vertical direction based on the image currently being displayed on the display 80). It can be formed. That is, the liquid crystal panel control unit 30 is a slit of the variable liquid crystal panel unit 10 when the display 80 is in the vertical viewing direction as shown in FIG. 1B according to the image direction notification signal from the image information analyzing unit 60. As shown in FIG. 3B, the control is performed so as to be formed in a direction parallel to the long side of the display 80 (vertical direction). On the other hand, when the display 80 is in the horizontal viewing direction as shown in FIG. 1A, the liquid crystal panel control unit 30 has a slit of the variable liquid crystal panel unit 10 as shown in FIG. 3C. ) So as to be formed in a direction parallel to (). In addition, when the viewer moves back, forth, left, and right, the position of the variable liquid crystal panel in which the slit is to be formed and the position of the slit in the variable liquid crystal panel should be changed to correspond to the movement. Accordingly, the liquid crystal panel controller 30 controls the selection of the variable liquid crystal panels 11 to 13 and the movement of the slit in the selected variable liquid crystal panel according to the observer position signal from the observer position detector 50. The description thereof will be described later in detail. In addition, the liquid crystal panel controller 30 controls not to apply an electric signal to all of the liquid crystal driving cells when the 2D image is to be displayed instead of the stereoscopic image.

The camera 40 photographs the observer and transmits the photographed image information to the observer position detector 50.

The observer position detector 50 detects a change in the position of the observer using the image information from the camera 40, generates an observer position signal corresponding to the detection result, and outputs the observer position signal to the liquid crystal panel controller 30. In order to precisely control the movement of the slit according to the change of the observer's position, it is important to accurately detect the change of the position of two eyes among the observer's body parts in real time. Therefore, the observer position detector 50 reads the image information from the camera 40 to recognize the position and size of the two eyes of the observer and continuously tracks the change so that the distance between the display 80 and the two eyes and Detect whether the eyes move. Additionally, when the viewer position detector 50 determines that the shape of the observer's eye photographed through the camera 40 is rotated compared to the previous shape, the observer position detector 50 determines that the user has rotated the terminal. The display rotation signal informing the changeover of the display 80 is output to the image information analyzing unit 60. Of course, as a method of detecting the rotation of the display 80, a technique applied to a mobile communication terminal capable of rotating the display 80 and performing a portrait view or a landscape view function according to a user's selection may be used. And, the technique of recognizing the position, size and shape of a specific part desired in the captured observer image as in the observer position detecting unit 50 of the present invention and tracking the change uses any position recognition and tracking algorithm that is conventionally used. You may.

The image information analyzer 60 analyzes the stereoscopic image information to be displayed on the display 80 and transmits the stereoscopic image information to the display 80 in accordance with the direction of the display 80. An image direction notification signal indicating a is generated and output to the liquid crystal panel controller 30. To this end, when the stereoscopic image information is input, the image information analyzer 60 analyzes the input stereoscopic image information and includes image direction information that informs the image direction already specified by the content provider CP in the stereoscopic image information. Check if it is. When the image direction information is included, the image information analyzer 60 transmits the input stereoscopic image information to the display 80 so that the stereoscopic image can be displayed in the direction specified in the image direction information, and informs the image direction. The direction notification signal is transmitted to the liquid crystal panel controller 30. On the other hand, when the image direction information is not included in the stereoscopic image information, the image information analysis unit 60 is provided from a sensing means (not shown) for detecting whether the observer position detecting unit 50 or the display 80 is swinging. The liquid crystal panel control unit 30 detects the direction of the current display 80 through the received display rotation signal, transmits stereoscopic image information input according to the direction to the display 80, and sends an image direction notification signal informing the corresponding image direction. To send. At this time, the information about the swing of the display conventionally uses a means for detecting the swing direction in the mobile communication terminal manufactured so that only the display 80 can swing in an arbitrary direction according to the user's selection without changing the position of the terminal. Can be obtained. Then, the image information analyzer 60 alternately inputs left and right eye image information to odd-numbered pixels and even-numbered pixels of the display 80 according to the direction of the display 80 (in the case of a binocular image). Since the technology itself is already known technology, a detailed description thereof will be omitted.

The backlight 70 transmits light to the display 80 so that the image displayed on the display 70 can be more clearly incident to the observer's eye. The backlight 70 is not necessary when the display 80 is made of an organic light emitting diode (OLED) to enable self-emission.

The display 80 is a flat panel display element that displays an image in accordance with stereoscopic image information from the image information analyzer 60.

In the above-described configuration of FIG. 2, the image information analyzer 60 detects the direction of the display 80 by using the display rotation signal from the observer position detector 50 and outputs an image direction notification signal accordingly. Display direction detecting means for detecting the direction of the display 80 using a conventional sensor capable of detecting the direction without using the observer image photographed through the 40 and generating an image direction notification signal according to the detection result (not shown) C) may be provided separately. In this case, the image information analyzing unit 60 only needs to output the stereoscopic image information, and the observer position detector 50 detects only the position change of the observer without detecting whether the display 80 is rotated and displays the result. It is only necessary to transmit to the panel controller 30. Therefore, the load on the observer position detector 50 and the image information analyzer 60 may be reduced.

FIG. 4 is a flowchart for describing an operation of the stereoscopic image forming apparatus of the present invention having the configuration of FIG. 2.

First, when the stereoscopic image information to be displayed is input to the display 80 (step 402), the image information analyzer 60 analyzes the input stereoscopic image information to determine whether the stereoscopic image information includes the image direction information. (Step 404).

When the image orientation information is included in the stereoscopic image information, the image information analysis unit 60 outputs the stereoscopic image information to the display 80 according to the image orientation information and the size (pixel number) of the display 80 and simultaneously corresponds to the image orientation information. An image direction notification signal informing of the image direction is output to the liquid crystal panel controller 30 (step 406).

That is, when the image direction information is included in the stereoscopic image information, the image information analysis unit 60 may match the direction (horizontal view direction or vertical view direction) specified in the image direction information regardless of the direction of the current display 80. Left eye and right eye image information are alternately inputted to odd-numbered pixels and even-numbered pixels of the display 80 (in the case of a two-eye image).

On the other hand, when the image direction information is not included in the stereoscopic image information in step 404, the image information analyzer 60 detects the display rotation signal from the observer position detector 50 or the swing of the display 80. The direction of the current display 10 is detected via a display rotation signal from the means (not shown) (step 408).

In the exemplary embodiment of the present invention, a case in which the direction of the display 80 is sensed by receiving the display rotation signal from the observer position detecting unit 50 as described in FIG. 2 is not limited thereto. In the present embodiment, as shown in FIG. 1, the direction of the camera 40 is also changed while the direction of the display 80 is switched, thereby photographing the viewer's eyes 90 degrees in rotation. Thus, the observer position detector 50 The rotation of the eye is detected to generate a display rotation signal. However, as shown in FIG. 5, when the display 80 is switched by rotating only the display 80 independently of the camera 40, the appearance (eye shape) of the observer photographed through the camera 40 does not change. There is no way to detect the rotation of the display 80 in the same way as above. Therefore, in this case, the direction of the display 80 may be sensed using a separate sensor (three-axis sensor, six-axis sensor, etc.) applied to the conventional terminal as shown in FIG. 5.

As a result of the detection of step 408, when the direction of the display 80 is in the horizontal viewing direction as in FIG. 1A, the image information analysis unit 60 is parallel to the short side of the display 80 as in FIG. 6A. The right eye image information and the left eye image information of the stereoscopic image information are alternately inputted to odd-numbered pixels and even-numbered pixels. The image information analyzer 60 outputs an image direction notification signal to the liquid crystal panel controller 30 to inform the liquid crystal panel controller 30 that the display 80 is in a horizontal viewing direction (step 410).

If, as a result of sensing in step 408, the direction of the display 80 is in the vertical viewing direction as shown in FIG. 1B, the image information analyzing unit 60 is located on the long side of the display 80 as shown in FIG. 6B. In parallel, left eye image information and right eye image information of stereoscopic image information are alternately input to odd-numbered pixels and even-numbered pixels. The image information analyzer 60 outputs an image direction notification signal to the liquid crystal panel control unit 30 to inform the liquid crystal panel control unit 30 that the display 80 is in the vertical viewing direction (step 412).

When the orientation of the display 80 is detected as in steps 406, 410, and 412, the liquid crystal panel controller 30 is variable to the variable liquid crystal panel 13 according to the image direction notification signal output from the image information analyzer 60. The slits are formed (step 414). In this case, it is assumed in the present invention that the variable liquid crystal panel 13 is set to be driven first by default in the variable liquid crystal panel unit 10.

That is, in the horizontal view as in step 410, the liquid crystal panel control unit 30 is the variable liquid crystal panel 13 as shown in FIG. 6A (only one liquid crystal panel 13 is shown in FIG. 6 for convenience of description). A control signal is formed so that an opaque band is alternately formed on the panel 13 in parallel with the short side of the slit 200, that is, the slit 200 is formed in parallel with the short side of the variable liquid crystal panel 13. Output to the liquid crystal panel driver 20. For example, the liquid crystal panel controller 30 may drive liquid crystals in odd-numbered (or even-numbered) positions from the short side of the liquid crystal panel 13 with respect to the liquid crystal driving cells divided into the matrix of the variable liquid crystal panel 13 as shown in FIG. 6A. The liquid crystal panel driver 20 is instructed not to input an electric signal to the cells and to input an electric signal to the liquid crystal driving cells in even (or odd) cells.

On the other hand, in the vertical view as in step 412, the liquid crystal panel controller 30 alternates opaque bands on the panel 13 in parallel to the long side of the variable liquid crystal panel 13 as in FIG. 6B. The control signal is outputted to the liquid crystal panel driver 20 so that the slit 300 is formed in parallel to the long side of the variable liquid crystal panel 13. For example, as shown in FIG. 6B, the liquid crystal panel controller 30 prevents an electric signal from being input to the even-numbered (or odd-numbered) liquid crystal driving cells from the long side of the liquid crystal panel 13. The liquid crystal drive cells 20 instruct the liquid crystal panel driver 20 to input an electric signal.

According to the control signal output from the liquid crystal panel control unit 30 as described above, the liquid crystal panel driver 20 generates a driving signal (electric signal) and applies them to the corresponding liquid crystal driving cells of the variable liquid crystal panel 13 to display the display 80. The direction of the slit in the variable liquid crystal panel 13 is changed to correspond to the direction of.

As such, by selectively applying an electrical signal to each liquid crystal driving cell of the variable liquid crystal panel 13 according to the direction of the display 80 to change the direction of the slit, the viewer changes the direction of the display 80 so that the display ( Even if the direction of the stereoscopic image shown in FIG. 80 is changed, as shown in FIG. 7, the left eye image information displayed on the display 80 can be applied to the left eye L and the right image information to the right eye R as shown in FIG. 7. 3D images can be enjoyed.

By the above-described method, the stereoscopic image may correspond to a change in the direction of the display 80. However, when the position of the observer is changed back and forth and left and right, the natural eye is not maintained and the left or right eye is not maintained. Only the image may be seen or the left eye image and the right eye image may overlap, resulting in distortion of the image quality or inversion of the stereoscopic image. Therefore, it is necessary to continuously detect whether the observer moves and change the position of the slit and the position of the variable liquid crystal panel in which the slit is to be formed.

Therefore, the observer position detector 50 continuously photographs the observer through the camera 40 and continuously recognizes and tracks the position of the eye in the captured image to determine whether the position of the observer (in particular, the position of the eye) has moved. Determine (step 416).

As a method of detecting a change in the position of an observer, various sensors such as an infrared sensor and an ultrasonic sensor disclosed in the related art may be used. However, in order to realize a more natural continuous stereoscopic image, it is important to accurately detect the position of the observer's eyes in real time. However, since a sensor using a reflected wave such as an infrared sensor or an ultrasonic sensor detects the nearest place, it is possible to detect a distance and a position of another object such as a hat, a nose, and an eyeglass frame that are closer to the display 80 than the position of two eyes. Accurate control may be difficult.

Therefore, in the present embodiment, after photographing the observer's face using the camera 40, eyes are recognized in the captured video image and the change is continuously tracked to determine the distance and angle between the display 80 and the two eyes in real time. Detect by

When it is determined in step 416 that the position of the observer's eye is shifted in the left and right directions as shown in FIG. 8, the observer position detecting unit 50 transmits an observer position signal indicating information about the movement to the liquid crystal panel controller ( 30). Accordingly, the liquid crystal panel controller 30 outputs a control signal to the liquid crystal panel driver 20 to control the slit position of the liquid crystal panel 13 to be moved in parallel to correspond to the direction in which the viewer moves. ) Move the position of the slit formed in parallel to (step 418).

That is, when the observer moves left and right with respect to the display 80 at the position where the observer normally observes the stereoscopic image (FIG. 9A), the transparent band forming a slit at the position where the left eye image and the right eye image are overlapped (liquid crystal driving without a driving signal applied) The cell line) and the opaque band (the liquid crystal driving cell line to which the driving signal is applied) must be moved as shown in FIG. 9B. At the position where the left eye image and the right eye image are inverted, the transparent band and the opaque band must be completely reversed as shown in FIG. 9C. Accordingly, the liquid crystal panel controller 30 applies a driving signal to the liquid crystal driving cells of the transparent band portion in the variable liquid crystal panel 13 to convert the transparent signal into an opaque band and does not apply a driving signal to the liquid crystal driving cells of the opaque band portion. The control signal to switch to the band is output to the liquid crystal panel driver 20.

9B and 9C, the positions of the slits are different with respect to the display 80. That is, when the size (width) of the liquid crystal driving cell is the same as the size (width) of the slit, it is impossible to satisfy both the slit movements of FIGS. 9B and 9C with one liquid crystal panel 13.

Therefore, in an exemplary embodiment of the present invention for solving this problem, the width of the liquid crystal driving cell is formed to be 1/2 or less of the slit width as shown in FIG.

11A and 11B show a state in which the slit is moved according to the movement of the observer in the horizontal and vertical views using the variable liquid crystal panel 13 in which the liquid crystal driving cells are formed as shown in FIG. 10.

However, as shown in FIG. 10, it may be substantially difficult to reduce the size of the liquid crystal driving cell. Until now, theoretically, it is known that a liquid crystal driving cell having a width of about 5 μm (microns) can be manufactured, but it is difficult to manufacture in reality. Moreover, if necessary, a situation may arise in which a liquid crystal drive cell having a width much smaller than 5 μm must be manufactured. As a method for solving such a realistic problem, the present invention uses two or more variable liquid crystal panels 13a and 13b having liquid crystal driving cells of the same size (width) as the width of the slit, as shown in FIG. 12A. The liquid crystal panel 13 'of the stacked structure can be used together with one liquid crystal panel 13 by slightly staggering them so that a part of them overlap. In this case, the method of moving the slits in the stacked liquid crystal panel 13 'sequentially drives the liquid crystal driving cell lines of each of the stacked liquid crystal panels 13a and 13b to form vertical slits. That is, as shown in FIG. 12B, the liquid crystal panel control unit 30 drives the liquid crystal driving cell line in the vertical direction as described above to the liquid crystal panel 13a to form a slit, and then, perpendicular to the liquid crystal panel 13b. The liquid crystal driving cell lines are driven to form slits.

When it is determined in step 416 that the position of the observer's eye is moved in the front-rear direction, the observer position detecting unit 50 of the plurality of liquid crystal panels 11 to 13 constituting the variable liquid crystal panel unit 10. One variable liquid crystal panel corresponding to the changed viewer's position is selected to form a slit in the liquid crystal panel by the method described above (step 420).

That is, as shown in FIGS. 13A and 13B, when the viewpoints p and p 'move forward and backward at a predetermined angle with respect to the display 80, the distance d between the display 80 and the liquid crystal panel 13 in which the slit is formed is d. , d ') should also be changed correspondingly so that the left and right image information L and R are accurately incident on the left and right eyes L and R, thereby allowing normal stereoscopic image observation.

Here, the relationship between the distances p and p 'between the display 5 and the observer 7 and the distances d and d' between the display 5 and the liquid crystal panel 13 is expressed by Equation 1 below. Is saved.

Here, s is the width of the pixels of the display 80, o is the left and right eye spacing (typically 65 mm).

At this time, the width w of the slit is obtained by the expression (2).

For example, assuming that the observer's distance (p) to the display 80 is 400 mm and the width of the pixel is 0.2 mm, the distance d between the display 80 and the slit-formed liquid crystal panel 13 is about 1.23 mm. However, when the observer backs and the observer's distance (p ') to the display 80 becomes 600 mm, the distance d' between the display 80 and the slit-formed liquid crystal panel 13 is about 1.84 mm. Should be. That is, when the viewing point of the display 80 is far away, the position of the liquid crystal panel 13 in which the slit is formed is also far away so that a normal stereoscopic image can be observed.

To this end, it is also possible to mechanically move one liquid crystal panel 13, but in such a case it is difficult to apply to a small terminal because its configuration is complicated and requires a large installation space. Accordingly, in the present invention, as shown in FIG. 1, the variable liquid crystal panel parts 10 are formed by overlapping the plurality of variable liquid crystal panels 11 to 13 at regular intervals. The liquid crystal panel controller 30 selects any one of the variable liquid crystal panels 11 to 13 according to the observer position signal and then moves the slit in the selected variable liquid crystal panel. At this time, the slit formation and the movement of the slit positions in the selected liquid crystal panel are the same as those in the liquid crystal panels 13 and 13 'described above.

FIG. 14 is a diagram illustrating an embodiment in which a stereoscopic image is implemented only for a portion of the display 80 using the above-described variable liquid crystal panel.

In the above-described embodiment, the stereoscopic image is realized with the size of the entire area of the display 80. However, in the case of using the variable liquid crystal panels 11 to 13 made of liquid crystal driving cells, as shown in FIG. Stereoscopic image implementation is possible only for.

That is, the slit formation and movement are controlled as described above only with respect to the liquid crystal driving cells in the specific region desired for the variable liquid crystal panels 11 to 13, and an electric signal (driving signal) is applied to the liquid crystal driving cells in other regions. It is possible to implement a partial three-dimensional image by controlling not to.

15 is a view showing the structure of a variable liquid crystal panel according to another embodiment of the present invention.

In this embodiment, a case in which the direction of the slits can be variably changed using liquid crystal panels capable of forming slits only in a specific direction will be described.

In the present exemplary embodiment, the variable liquid crystal panel portion 10 ′ has a unidirectional liquid crystal panel 14 and a long side of the panel, in which slits can be formed only in a direction parallel to the short side of the panel as shown in FIG. 15A. The one-way liquid crystal panel 15 capable of forming slits only in a direction parallel to a long length has a structure overlapping each other by 90 degrees.

In this structure, when the display 80 is in the landscape view, the liquid crystal panel controller 30 outputs a control signal to the liquid crystal driver 20 to alternately form slits only in the liquid crystal panel 14 as shown in FIG. 15B. . The liquid crystal panel controller 30 controls the entire liquid crystal panel 15 to be in a transparent state by preventing a driving signal from being applied to the liquid crystal panel 15.

On the other hand, when the display 80 is in the portrait view, the liquid crystal panel controller 30 outputs a control signal to the liquid crystal driver 20 so that slits are alternately formed only in the liquid crystal panel 15 as shown in FIG. 15C. The liquid crystal panel controller 30 controls the entire liquid crystal panel 14 to be in a transparent state by preventing a driving signal from being applied to the liquid crystal panel 14.

16 is a view showing still another embodiment of the present invention.

In the above-described embodiment, the variable liquid crystal panel unit 10 is provided in front of the display 80, but the variable liquid crystal panel unit 10 may be formed between the backlight 70 and the display 80 as shown in FIG. .

As described above, the present invention consists of a liquid crystal panel for realizing a stereoscopic image by forming liquid crystal driving cells in a matrix form and controlling the driving of the liquid crystal driving cells independently, thereby continuing the change even when the direction of the terminal display and the observer's position change. It is possible to realize a natural and three-dimensional image.

Claims (17)

A liquid crystal panel in which an opaque band and a transparent band are formed at regular intervals according to whether an electric signal is applied to form a slit for controlling an incident angle or an exit angle of light output from a display. When the liquid crystal driving layer of the liquid crystal panel is divided into a plurality of liquid crystal driving cells arranged in a matrix form, the liquid crystal driving cells are independently driven in accordance with the electrical signal, characterized in that the variable liquid crystal panel for implementing a stereoscopic image. The liquid crystal display cell of claim 1, wherein each of the liquid crystal driving cells A variable liquid crystal panel for stereoscopic image, characterized in that the width is the same as the width of the slit. The liquid crystal display cell of claim 1, wherein each of the liquid crystal driving cells A variable liquid crystal panel for realizing a stereoscopic image, characterized in that its width is less than or equal to 1/2 of the width of the slit. An apparatus for realizing a stereoscopic image of stereoscopic image information displayed on a display, A variable liquid crystal panel unit slit for controlling the incident angle or the exit angle of the light output from the display in parallel to the short side or the long side of the display according to a driving signal; Display direction detection means for detecting a direction of the display and outputting an image direction notification signal corresponding to the direction; A liquid crystal panel controller which controls the variable formation of the slit by calculating whether the driving signal is applied to each of the liquid crystal driving cells of the variable liquid crystal panel unit according to the image direction notification signal; And And a liquid crystal panel driver for generating the driving signal according to a control signal from the liquid crystal panel controller and outputting the driving signal to the variable liquid crystal panel unit. The method of claim 4, wherein A camera which photographs an observer and outputs photographed image information; And Recognizing the eye of the observer in the image information to track the change of the eye and according to the tracking result to the observer position detection unit for outputting the observer position signal to inform the position of the observer A stereoscopic image forming apparatus. 6. The liquid crystal panel of claim 4 or 5, wherein the variable liquid crystal panel unit And at least one variable liquid crystal panel in which a plurality of liquid crystal driving cells independently driven according to the driving signal are arranged in a matrix form. The liquid crystal panel of claim 6, wherein the variable liquid crystal panel unit And a plurality of the variable liquid crystal panels overlapping each other at predetermined intervals. The liquid crystal display panel of claim 7, wherein the liquid crystal panel controller When the observer's position is moved in the front-rear direction, selecting one of the overlapping variable liquid crystal panels corresponding to the observer's movement based on the observer position signal to control the slits to be formed only in the selected variable liquid crystal panel. An apparatus for implementing a stereoscopic image, characterized in that. The liquid crystal display panel of claim 8, wherein the liquid crystal panel controller When the observer's position is shifted in the left and right direction, the drive position of the liquid crystal drive cells is moved in parallel to the left and right movement based on the observer position signal with respect to the variable liquid crystal panel selected by the observer's forward and backward movement. An apparatus for implementing a stereoscopic image, wherein the position is shifted. The liquid crystal panel of claim 9, wherein each of the variable liquid crystal panels And the first variable type liquid crystal panel and the second variable type liquid crystal panel are alternately overlapped with each other so that a part of the liquid crystal driving cell of the first variable liquid crystal panel and the liquid crystal driving cell of the second variable liquid crystal panel overlap. . The liquid crystal display panel of claim 10, wherein the liquid crystal panel controller And driving the first variable type liquid crystal panel and the second variable type liquid crystal panel alternately to move the position of the slit in a left and right direction. The liquid crystal panel controller of claim 6, wherein When the position of the observer is moved in the left and right direction, the stereoscopic position of the slit by moving the drive position of the liquid crystal drive cells in parallel to the specific variable liquid crystal panel in the left and right direction based on the observer position signal. Image implementation device. The liquid crystal panel of claim 12, wherein each of the variable liquid crystal panels And the first variable type liquid crystal panel and the second variable type liquid crystal panel are alternately overlapped with each other so that a part of the liquid crystal driving cell of the first variable liquid crystal panel and the liquid crystal driving cell of the second variable liquid crystal panel overlap. . The liquid crystal panel controller of claim 13, wherein And driving the first variable type liquid crystal panel and the second variable type liquid crystal panel alternately to move the position of the slit in a left and right direction. The liquid crystal panel controller of claim 4, wherein And controlling the driving signal to be applied only to the liquid crystal driving cells in odd-numbered or even-numbered liquid crystal driving cells from the short side or the long side of the variable liquid crystal panel according to the direction of the display. The liquid crystal panel of claim 4, wherein the variable liquid crystal panel unit The stereoscopic image implementation device, characterized in that provided in the front or rear of the display. 6. The liquid crystal panel of claim 4 or 5, wherein the variable liquid crystal panel unit And a first one-way liquid crystal panel in which the slits are formed only in the first direction and a second one-way liquid crystal panel in which the slits are formed only in the second direction.

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