KR101190050B1 - 3-dimensional displaying apparatus and driving method thereof - Google Patents

Abstract

The present invention provides an image display panel for emitting image information of two or more fields; Parallax separating means disposed in front of the image display panel; And pixels constituting a plurality of data rows formed in the image display panel, wherein pixels of at least one of the plurality of data rows are horizontally shifted so as to deviate from an array of pixels of adjacent data rows on a vertical line. A stereoscopic image display device and a driving method thereof are provided. Thereby, when the horizontal position of the observer changes, it is possible to minimize the change in the brightness of the image information and the cross talk between adjacent viewing areas, and to prevent inverted stereoscopic vision.

Description

Stereoscopic Display and Driving Method {3-DIMENSIONAL DISPLAYING APPARATUS AND DRIVING METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display device, and more particularly, to a change in brightness of image information when a horizontal position of an observer is changed by using an autostereoscopic method (or an autostereoscopic method) using a delta structure display. And a stereoscopic image display device and a driving method thereof capable of minimizing cross talk between adjacent viewing areas and preventing inverse stereoscopic vision.

Recently, as the users' demand for a display device capable of realizing a three-dimensional image capable of realizing stereoscopic characteristics that cannot be realized in a conventional two-dimensional image is increasing, a display device capable of expressing a three-dimensional image has been developed in response to this. .

The reason why a person feels a three-dimensional feeling when looking at an object in nature is that the angle of view of both eyes is slightly different when staring at the object with the left and right eyes. The image information of the object with slightly different viewing angles is imaged on the retina through the right eye and the left eye, and the stereoscopic vision information is transmitted to the brain through the optic nerve.

Specifically, a three-dimensional image is generally performed by the principle of stereo vision through two eyes. The parallax of two eyes, that is, binocular disparity that appears because the eyes are about 65 mm apart. A display device capable of displaying a three-dimensional image by using is proposed. In detail, the three-dimensional image implementation, the left and right eyes looking at the display device will see different two-dimensional images, and when these two images are transmitted to the brain through the retina, the brain will fuse them together exactly and the original three-dimensional image. It is to reproduce the sense of depth and reality of the phenomenon, such a phenomenon is commonly called stereography (stereography).

In general, a 3D image reproducing apparatus using a stereographic image method displays a digital image or a computer graphic image separated into a left eye image and a right eye image by using an LCD monitor or a CRT monitor. Alternately enters the left and right eyes of an observer equipped with. Two-dimensional images coming out of the LCD monitor or CRT monitor are synchronized by the infrared sensor and are incident to the left and right eyes alternately, so that an observer wearing special glasses feels as if they are viewing a three-dimensional image. In the existing method, only observers wearing special glasses can see stereoscopic images, and several people cannot observe stereoscopic images at the same time. In addition, when observing stereoscopic images through special glasses, the eyes are heavily burdened, and the observer easily feels fatigue.

Therefore, in addition to the stereoscopic image display by such special glasses, autostereoscopic stereoscopic display and holographic display methods have been developed.

Meanwhile, the conventional autostereoscopic 3D stereoscopic image display apparatus disposes a parallax separating means in front of a conventional 2D image display apparatus, and delivers a 3D stereoscopic image by delivering images of disparity different from the left eye and the right eye of the observer. It provides the viewer with a realistic three-dimensional image. Parallax barrier plates and lenticular lens sheets are provided as parallax separation means for providing a three-dimensional effect. An example of implementing a three-dimensional image using a parallax barrier plate as the parallax separation means is shown in FIG. 1.

1 is a cross-sectional view showing the principle of implementation of a three-dimensional image display device using a conventional parallax barrier plate. Referring to FIG. 1, the 3D image information display apparatus 100 according to the prior art has a parallax barrier plate disposed spaced apart from a general 2D image display panel 110 and a front surface of the image display panel 110. 130). The pixel formed in the image display panel 110 includes a left eye image pixel 13 and a right eye image pixel 15. The parallax barrier plate 130 is composed of an open area and a barrier area, and image information emitted from the left eye image pixel 13 and the right eye image pixel 15 passes through the open area, but does not pass through the barrier area. As such, the image information passing through the open area arrives focused on the designed viewing distance. On the other hand, at the position of the observer at the designed viewing distance, only the left eye image information is observed at the A position, and only the right eye image information is observed at the B position.

However, there are various problems to be solved in a method of displaying a 3D image through parallax separation by the parallax barrier plate 130. First, for example, if the position of the eye moves horizontally so that the left eye is in the D position and the right eye is in the E position, the left eye image pixel 13 and the right eye image pixel ( The image information emitted by 15) is applied to the left and right eyes at the same time, so that a clear three-dimensional image cannot be seen. This phenomenon is referred to as crosstalk between views.

Secondly, when the viewer's left eye is in B position and the right eye is in C position by horizontal movement of the observer, the left eye sees the image information emitted from the right eye image pixel 15, and the right eye is left eye image pixel ( You will see the image information emitted in 13). As a result, there is a problem of not being able to see normal 3D stereoscopic image information due to inverted stereoscopic vision.

Third, there is a problem that the brightness of the image in the corresponding viewing area is not uniform, and the brightness of the image changes when the eye moves horizontally. This problem will be described in detail with reference to FIG.

FIG. 2 is a graph of light distribution between regions of a 3D image using a conventional parallax separation means. FIG. Here, the horizontal axis represents the horizontal position at the viewing distance, and the vertical axis represents the light intensity. Referring to FIG. 2, for example, when the eyes are positioned in the first eye field (indicated by a solid line) and the second eye field (indicated by a dashed line), respectively, and the horizontal eye moves horizontally to the right or left, the brightness of the corresponding image. It can be seen that the crosstalk problem, which is mixed with the adjacent field view information, occurs simultaneously.

  In the above description, the parallax barrier plate is used as the parallax separating means, but the same problem occurs when the lenticular lens sheet is used.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to minimize the change in brightness and cross talk between adjacent viewing areas in an autostereoscopic 3D display device, and to prevent reverse stereoscopic vision. The present invention provides a stereoscopic image display device and a driving method thereof.

In order to solve the above-mentioned problem, a stereoscopic image display apparatus according to the present invention, the image display panel for emitting image information of two or more viewing areas; Parallax separating means disposed in front of the image display panel; And pixels constituting a plurality of data rows formed in the image display panel, wherein pixels of at least one of the plurality of data rows are horizontally shifted so as to deviate from an array of pixels of adjacent data rows on a vertical line. It is done.

The image display panel may include a flat panel display and a projection optical system including a liquid crystal display (LCD), a plasma display panel (PDP), and a field emission display (FED). It can be any one of the screens.

In addition, the parallax separating means may be a parallax barrier plate or a lenticular lens sheet.

The stereoscopic image display device may further include a pupil tracking unit that tracks the position of the observer's pupil.

In this case, the pupil tracking unit feeds back the position of the tracked pupil to the image display panel, and the image display panel selects one of an even data row and an odd data row among the plurality of data rows according to the position of the fed back pupil. It is desirable to drive only the pixels of one data row.

In addition, the open area and the barrier area of the parallax barrier plate, or the lens pattern of the lenticular lens sheet may be disposed perpendicular to the data row of the image display panel.

In addition, the method for driving a stereoscopic image display device according to the present invention includes the steps of: (a) emitting image information of two or more fields in an image display panel including pixels forming a plurality of data rows; (b) dividing the viewing area of the expressed image information by the parallax separating means disposed in front of the image display panel; And (c) in the pupil tracking unit, tracking the position of the observer's pupil and feeding back the tracked pupil position to the image display panel. (d) selecting and driving only pixels of any one of even-numbered data rows and odd-numbered data rows of the plurality of data rows according to the position of the fed back pupil in the image display panel. do.

Here, in the step (d), when the position of the fed back pupil passes a position corresponding to 1/2 the light intensity peak value of the viewing area formed by the pixels of the even data row or the odd data row, It is desirable to change the selection.

According to the present invention, when the horizontal position of the observer is changed, it is possible to minimize the change in the brightness of the image information and the cross talk between adjacent viewing areas, and to prevent reverse stereoscopic vision.

1 is a cross-sectional view showing the principle of implementation of a three-dimensional image display device using a conventional parallax barrier plate.
2 is a light distribution graph of inter-view regions of three-dimensional images using conventional parallax separation means.
3 is a top view of a pixel structure of a conventional 3D image display panel and a pixel structure of a 3D image display panel according to the present invention.
4 is a structural diagram of a stereoscopic image display device to which a parallax barrier plate according to a first embodiment of the present invention is applied.
5 is a conceptual diagram illustrating an operating principle of a stereoscopic image display device to which a parallax barrier plate according to a first embodiment of the present invention is applied.
6 is a structural diagram of a stereoscopic image display device to which a lenticular lens sheet according to a second exemplary embodiment of the present invention is applied.
FIG. 7 is a conceptual diagram illustrating an operating principle of a stereoscopic image display apparatus to which a lenticular lens sheet according to a second exemplary embodiment of the present invention is applied. FIG.

Hereinafter, a stereoscopic image display device and a driving method thereof according to an exemplary embodiment will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

In addition, the size of each component in the drawings may be exaggerated for the sake of explanation and does not mean a size actually applied.

3 is a top view of a pixel structure of a conventional 3D image display panel and a pixel structure of a 3D image display panel of the present invention. As shown in (a), a pixel structure of a conventional three-dimensional image display panel is composed of a plurality of data rows, and a plurality of data rows are composed of even data rows and odd data rows, and each data row is a plurality of data rows. It consists of pixels. In the pixel structure of a conventional 3D image display panel, pixels of an even data row and an odd data row are regularly arranged so that the distance denoted by P is not only between pixels in the same line, for example, 2n + 1 line, but also in other lines, for example. For example, the same is true between pixels of 2n + 1 lines and pixels of 2n lines.

On the other hand, the pixels of the image display panel according to the present invention are arranged in a structure as shown in (b). In particular, the pixel structure of the stereoscopic image display device according to the present invention is disposed by moving 1/2 pixel horizontally for each adjacent data row. For example, if the distance between the pixels in the 2n + 1 line is P, the distance between the pixels of another line, for example the 2n + 1 line, and the pixels of the 2n line is P / 2. This structure is called a delta structure. However, the distance between pixels of adjacent data rows is not necessarily limited to P / 2. Thus, the delta structure of the present invention can be understood as the pixels in at least one row of the plurality of data rows are moved horizontally to deviate from the array of pixels in adjacent data rows on a vertical line. Pixels are horizontally shifted so as to deviate from the array of pixels of adjacent data rows on a vertical line.

My Example 1

4 is a structural diagram of a stereoscopic image display device to which a parallax barrier plate according to a first embodiment of the present invention is applied. Referring to FIG. 4, the stereoscopic image display apparatus 200 to which the parallax barrier plate 230 according to the first embodiment of the present invention is applied includes an image display panel 210 and an image display panel displaying information of two or more viewing areas. 210 is composed of a parallax barrier plate 230 spaced apart from the predetermined distance. The image display panel 210 includes a flat panel display and a projection optical system including a liquid crystal display (LCD), a plasma display panel (PDP), and a field emission display (FED). It can be any one of the screens. In addition, the image display panel 210 has a pixel structure having a delta structure of FIG. 3B as described above. In this case, each pixel 10 may be composed of sub-pixels of respective RGB to implement a color display, and a black matrix 20 is formed between each pixel. The parallax barrier plate 230 used in the present invention is designed such that the image information formed on the image display panel 210 is separated into the left eye field and the right eye field at the designed viewing distance. (See Figure 1). In addition, the open area 233 and the barrier area 235 of the parallax barrier plate 230 of the present invention are disposed perpendicular to the data row of the image display panel 210.

In addition, the pixels of the even data row and the pixels of the odd data row on the image display panel 210 are driven such that only the pixels of any one row display image information according to the position of the observer's eye. At this time, the pupil tracking unit 270 is further provided to measure the position of the observer's eye. The pupil tracking unit 270 drives only image pixels of any one of the pixels in the even data row or the pixels in the odd data row to turn on the image information according to the change in the position of the observer's eye. Enables you to view optimal three-dimensional images.

5 is a conceptual diagram illustrating an operating principle of a stereoscopic image display apparatus to which a parallax barrier plate according to a first embodiment of the present invention is applied. Referring to FIG. 5, only pixels in even-numbered rows of pixels under the parallax barrier plate 230 emit image information, and pixels in odd-numbered rows do not emit image information, as shown in the upper left figure. The image information of the data row is displayed alternately with the image information of the first viewing area and the second viewing area.

In this case, as shown in the inter-view optical distribution graph at the lower left, the image information passing through the parallax barrier plate 230 is the same as that shown by the solid line at the designed viewing distance. Solid line region)) and an image of the right eye (second viewing area (right solid line region)) are formed separately. In this case, when the left eye and the right eye of the observer are located at the first viewing area and the second viewing area, respectively, a clear three-dimensional stereoscopic image can be viewed.

However, when the observer moves horizontally to the right, for example, the observer moves to a position beyond each viewing area through the area where the brightness of the viewing area decreases. In this case, the observer does not see a clear three-dimensional stereoscopic image. Accordingly, the pupil tracking unit 270 connected to the image display panel tracks the position of the observer's pupil and feeds back the tracking result to the image display panel 210. In this case, in the feedback tracking result, the position of the pupil is from the middle portion of the viewing field (that is, the position when the light illuminance of the viewing region is the peak), and the pixels of the adjacent data rows of the viewing region (odd data in this example). Shifted to the viewing area formed by the pixels in the row and moved to a position where the viewing area and the brightness of the viewing area are reversed (that is, a position corresponding to 1/2 of the peak value of the light intensity of the corresponding viewing area). It can be predicted as the position where the brightness of the viewing area of the data row is reversed. Therefore, at this point in time, as shown in the upper right, the pixels in the odd data rows are driven to display the image information, and the pixels in the even data rows are not driven so as not to display the image information. As a result, as shown in the lower right, the observer can minimize the crosstalk between the change in brightness of the corresponding field of view and the adjacent field of view, and can observe the 3D stereoscopic image without the reverse stereoscopic view.

Second Example

6 is a conceptual diagram of a stereoscopic image display device to which a lenticular lens sheet according to a second embodiment of the present invention is applied. The second embodiment of the present invention is a case where the lenticular lens sheet 250 is applied instead of the parallax barrier plate 230 as the parallax separating means. Referring to FIG. 6, the present invention includes an image display panel 210 displaying information of two or more viewing areas and a lenticular lens sheet 250 spaced apart from the image display panel by a predetermined distance. The image display panel 210 includes a flat panel display and a projection optical system including a liquid crystal display (LCD), a plasma display panel (PDP), and a field emission display (FED). It can be any one of the screens. In addition, the image display panel 210 is arranged with the pixel structure of the delta structure of FIG. In this case, each pixel 10 may be configured of sub-pixels of respective RGB in order to implement a color display, and a black matrix 20 is formed between each pixel 10. The lenticular lens sheet 250 used in the present invention is designed so that the image information formed on the image display panel 210 is separated into the left eye field and the right eye field at the designed viewing distance. In addition, the lens pattern of the lenticular lens sheet 270 of the present invention is disposed perpendicular to the data row of the image display panel.

In addition, the pixels of the even data row and the pixels of the odd data row of the image display panel 210 are driven such that only the pixels of any one row display the image information according to the position of the observer's eye. At this time, the pupil tracking unit 270 is further provided to measure the position of the observer's eye. The pupil tracking unit 270 drives only image pixels of any one of the pixels in the even data row or the pixels in the odd data row to turn on the image information according to the change in the position of the observer's eye. Enables you to view optimal three-dimensional images. The concept of how such a configuration of the present invention solves the conventional problem is shown in FIG.

7 is a conceptual diagram illustrating an operating principle of a stereoscopic image display apparatus to which a lenticular lens sheet according to a second embodiment of the present invention is applied. Referring to FIG. 7, only pixels in even data rows of the pixels 270 below the lenticular lens sheet emit image information, and pixels in odd data rows do not display image information, as shown in the upper left figure. The image information of a row is displayed by alternately displaying image information of a first viewing area and a second viewing area.

In this case, as shown in the inter-view optical distribution graph at the lower left, the image information passing through the lenticular lens sheet 250 is the same as the portion indicated by the solid line at the designed viewing distance. Region) and the image of the right eye (second viewing region (right solid line region)) are formed separately. In this case, when the observer's left eye and right eye are located at the first viewing area and the second viewing area, respectively, a clear three-dimensional stereoscopic image can be viewed.

However, when the observer moves horizontally to the right, for example, the observer moves to a position beyond each viewing area through the area where the brightness of the viewing area decreases. In this case, the observer does not see a clear three-dimensional stereoscopic image. Accordingly, the pupil tracking unit 270 connected to the image display panel tracks the position of the observer's pupil and feeds back the tracking result to the image display panel 210. In this case, in the feedback tracking result, the position of the pupil is from the middle portion of the viewing field (that is, the position when the light illuminance of the viewing region is the peak), and the pixels of the adjacent data rows of the viewing region (odd data in this example). Shifted to the viewing area formed by the pixels in the row and moved to a position where the viewing area and the brightness of the viewing area are reversed (that is, a position corresponding to 1/2 of the peak value of the light intensity of the corresponding viewing area). It can be predicted as the position where the brightness of the viewing area of the data row is reversed. Therefore, at this point in time, as shown in the upper right, the pixels in the odd data rows are driven to display the image information, and the pixels in the even data rows are not driven so as not to display the image information. As a result, as shown in the lower right, the observer can minimize the crosstalk between the change in brightness of the corresponding field of view and the adjacent field of view, and can observe the 3D stereoscopic image without the reverse stereoscopic view. In this embodiment, the stereoscopic image of the simplest two-view field is taken as an example, but by setting n pixels in the same row corresponding to the pitch of one lenticular lens, and setting the pixel shift of adjacent data rows to ± P / n or more, It is also possible to form n viewing zones of 2 o'clock or more.

In the detailed description of the present invention as described above, specific embodiments have been described. However, various modifications are possible within the scope of the present invention. The technical spirit of the present invention should not be limited to the above-described embodiments of the present invention, but should be determined by the claims and equivalents thereof.

10: pixel 13: left eye image pixel
15: Right eye image pixel 20: BM portion (Black Matrix)
100, 200: stereoscopic image display apparatus 110, 210: image display panel
130, 230 parallax barrier substrate 233: open area
235: barrier area 250: lenticular lens sheet
270: pupil tracking unit

Claims (8)

An image display panel emitting image information of two or more viewing areas;
Parallax separating means disposed in front of the image display panel;
A pupil tracking unit for tracking the position of the pupil of the observer; And
Pixels constituting a plurality of rows of data formed on the image display panel,
Pixels of at least one row of the plurality of data rows are horizontally shifted so as to deviate from the array of pixels of adjacent data rows on a vertical line,
And driving only pixels of any one of the plurality of data rows according to the position of the pupil of the viewer.
The method of claim 1,
The image display panel is any one of a flat panel display including a liquid crystal display (LCD), a plasma display (PDP) and a field emission display (FED) and a screen of a projection optical system. .
The method of claim 1,
The parallax separating means is a parallax barrier plate or a lenticular lens sheet.
delete The method of claim 1,
The pupil tracking unit feeds back the position of the tracked pupil to the image display panel,
When the horizontal movement shifted on the vertical line of the image display panel is 1/2 of the size of the horizontal pixel,
And the image display panel drives pixels of any one of an even data row and an odd data row of the plurality of data rows according to the position of the fed back pupil.
The method of claim 3, wherein
The open area and the barrier area of the parallax barrier plate, or the lens pattern of the lenticular lens sheet is disposed perpendicular to the data row of the image display panel.
(a) emitting image information of two or more fields in an image display panel including pixels forming a plurality of data rows;
(b) separating the field of view of the emitted image information in the parallax separating means disposed on the front of the image display panel; And
(c) tracking, by the pupil tracking unit, the position of the observer's pupil and feeding back the tracked pupil position to the image display panel;
(d) selecting and driving only pixels of any one of even-numbered data rows and odd-numbered data rows of the plurality of data rows according to the position of the fed back pupil in the image display panel. A stereoscopic image display device driving method.
8. The method of claim 7,
The step (d)
And when the position of the fed back pupil passes a position corresponding to one-half the magnitude of the light intensity peak value of the viewing area formed by the pixels of the even data row or the odd data row, the selection is changed. 3D image display device driving method.

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