KR20050049626A - Apparatus and method for video display - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an image display apparatus and a method thereof.

2. The technical problem to be solved by the invention

The present invention displays a three-dimensional image in a vertical or horizontal direction by using a liquid crystal display and a Parallax Barrier method, and also a TN panel or a liquid crystal display panel using a Parallax barrier (image display mask). To provide an image display apparatus and method for displaying a two-dimensional or three-dimensional image in a vertical or horizontal direction using the.

3. Summary of Solution to Invention

The present invention provides an image display apparatus comprising: image processing means for exchanging color values in sub-pixel units of a liquid crystal display means; Said liquid crystal display means for displaying an image by converting a sub-pixel from said image processing means; And image display masking means attached to said liquid crystal display means for displaying a three-dimensional image.

4. Important uses of the invention

The present invention is used for a video display system and the like.

Description

Apparatus and Method for Video Display

The present invention relates to an image display apparatus and method for displaying images in sub-pixel units in a vertical / horizontal, two-dimensional and three-dimensional manner using a liquid crystal display panel, and more particularly, a liquid crystal display. Display the 3D image in the vertical or horizontal direction using the display and the Paraallax Barrier method, and also use the TN Panel or the liquid crystal display panel as the Parallax Barrier (image display mask). An image display apparatus and method for displaying a two-dimensional or three-dimensional image in a horizontal direction.

Recently, a display device using a thin film transistor panel (TFT-LCD) has been used in various fields. Specifically, a display device using a thin film transistor panel (TFT-LCD) is used in a notebook computer, an electronic calculator, a cash register, or a rooftop advertisement device. Is being applied.

In addition, another display device is an organic electroluminescent device (Organic Electro Luminescence). This organic electroluminescent device is a display device that displays characters and images by using an organic light emitting device that emits itself when voltage is applied, and has a wider viewing angle, a faster response time, and a thinner and lighter than a thin film transistor panel (TFT-LCD). Due to its use a lot. Therefore, the development of the organic light emitting display device makes the thickness of the display device even thinner and is used in mobile devices. The research and development of the organic light emitting device technology that can be applied not only to mobile applications but also to notebook computers and televisions (TVs) is made. ought.

In general, the biggest factor that humans feel in three dimensions is the effect of the spatial difference on the left and right retinas caused by the left and right eyes looking at an object in one direction. Using this effect, a method of displaying different images, that is, stereoscopic images, in both left and right eyes was used. The stereoscopic image has been developed into a method of wearing glasses and a method of not wearing glasses according to the display method. The most representative method of viewing glasses without glasses is to attach a lenticular plate representing only vertical parallax to the image display device. It is a method of viewing an image, and has been further developed into a multi-view image display mask such as a multi-view or ultra-multi-view IP (Integral Photography) plate, a cross lenticular plate, or a rectangular lens plate.

Meanwhile, the 3D display method is divided into a method of observing a 3D image with glasses and a method of observing a 3D image without glasses.

First, a method of observing a 3D image wearing glasses is a suitable method for observing an observer without moving in a large space such as a theater, and uses a binocular stereoscopic image display method. On the other hand, as a method of viewing without wearing glasses, there is a display method using a multi-view image, which gives a feeling that a few observers are observing objects at different angles while changing positions.

In addition, a conventional technique for naturally observing a 3D image without wearing glasses includes a Parallax Barrier Reticular that attaches a mask to a display device. When displaying a 3D image using a dual Parallax Barrier (Barrax Barrier), there is a problem that the stripes of the barrier (barrier) appears when the size of the pixel is large. Therefore, in order to solve this problem, a method of displaying a sub-pixel unit by narrowing the interval of the barrier, that is, the sub-pixel unit, to the sub-pixel unit. Developed into.

Recently, as a personal digital assistant (PDA), which is a personal portable terminal, has become commonplace, a method of displaying a 3D image on a PDA, etc. has been introduced.

1A or 1B is an exemplary explanatory diagram of an arrangement of sub-pixels representing colors of a general liquid crystal display device.

FIG. 1A illustrates a structure of a liquid crystal display (LCD) in which sub-pixels are arranged in a horizontal direction, and FIG. 1B illustrates a structure of a liquid crystal display (LCD) in which sub-pixels are arranged in a horizontal direction. The structure is shown. That is, when arranged horizontally as shown in FIG. 1A, when rotated horizontally, a structure as shown in FIG. 1B is obtained.

However, when using the arrangement method of the sub-pixels representing the colors of the general liquid crystal display device as described above, it becomes impossible to display three-dimensional images in sub-pixel units. there was.

The present invention has been proposed to solve the above problems, and displays a three-dimensional image in a vertical or horizontal direction by using a liquid crystal display and a Parallax Barrier method, and also displays a Parallax barrier (image display). It is an object of the present invention to provide an image display apparatus and a method for displaying a two-dimensional or three-dimensional image in a vertical or horizontal direction using a TN panel or a liquid crystal display panel as a mask).

The apparatus of the present invention for achieving the above object comprises: image processing means for exchanging color values in sub-pixel units of liquid crystal display means; Said liquid crystal display means for displaying an image by converting a sub-pixel from said image processing means; And image display masking means attached to the liquid crystal display means for displaying a three-dimensional image.

On the other hand, the method of the present invention, the image display method, comprising: a first step of exchanging color values between left and right images in the image processing unit; A second step of displaying color values on the liquid crystal display after the color values are exchanged between the left and right images by the image processor; And a third step of displaying a 3D image in units of sub-pixels by placing an image display mask on the liquid crystal display device.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram of an image display apparatus according to an embodiment of the present invention.

As shown in FIG. 2, the image display apparatus according to the present invention includes an image processor (not shown) for exchanging color values in units of sub-pixels of the liquid crystal display apparatus 210. A liquid crystal display device 210 for converting a sub-pixel from the image processor to display an image, and an image display mask attached to the liquid crystal display device 210 to display a 3D image; 220).

The image display apparatus according to the present invention displays a three-dimensional image in a horizontal or vertical direction by attaching an image display mask 220 to display a three-dimensional image in a vertical or horizontal direction by a Parallax Barrier method. can do. At this time, in the present invention, by using a liquid crystal display panel or a TN panel as the image display mask 220, it is possible to display a two-dimensional / three-dimensional combined use according to the on / off of the panel (On / Off) Do. Here, the image display mask 220 displays an image displayed from the liquid crystal display device 210 in a desired direction, such as a Parallax Barrier, and a barrier of the image display mask 220 is a chess board. It is composed of similar patterns.

In the present invention, when the image display mask 220 displays a 2D image by using a TN panel or a device capable of electronically turning on / off light transmission, an image is displayed. The display mask is a front-transmissive type so that two-dimensional images can be viewed. When displaying a three-dimensional image, the three-dimensional image can be viewed by adjusting the on / off of the image display mask.

When the image is displayed in the three-dimensional manner by the above method, the image displayed on the liquid crystal display device 210 has a different display direction for each color between the sub-pixels due to the image display mask 220. Therefore, in order to solve this problem, although not shown in the drawing, a sub-pixel unit image processing unit is included.

That is, the image display apparatus according to the present invention is attached to the image display mask 220 by using a Parallax Barrier method on the liquid crystal display apparatus 210 for sub-pixel unit 3D display. Alternatively, the 3D image can be observed in the vertical direction. Here, the Paraallax Barrier method alternately prints or prints images of the left and right eyes to be viewed, respectively, in a vertical pattern, and uses an extremely thin vertical grid (here, referred to as "barrier"). To see. In this way, the vertical pattern image to enter the left eye and the vertical pattern image to enter the right eye are distributed by the barrier, so that a three-dimensional effect can be obtained by viewing different images slightly staggered by the left and right eyes.

Meanwhile, an interval between the liquid crystal display device 210 and the image display mask 220 may be determined according to Equation 1 below.

Here, "g" is the distance between the liquid crystal display device 210 and the image display mask 220, "z" is the distance between the liquid crystal display device 210 and the observer, and "i" is a sub-pixel of the liquid crystal display device. -Pixel) Pitch, and "e" is the observation width, which represents the distance between human eyes. Here, the distance between the two eyes of a human has a value within 60 mm to 70 mm, and a value of 65 mm is usually used.

Meanwhile, the barrier pitch of the image display mask 220 is calculated by Equation 2 below.

Here, "b" is the barrier pitch of the image display mask, "g" is the distance between the liquid crystal display device 210 and the image display mask 220, and "z" is the distance between the liquid crystal display device 210 and the observer. The distance and "i" represent the Sub-Pixel pitch of the liquid crystal display device, respectively.

Meanwhile, the image display mask 220 includes a transmissive region and a non-transmissive region, and the transmissive region and the non-transmissive region are distributed in a diagonal direction. The non-transmissive area of the image display mask 220 is a barrier in the horizontal direction when the sub-pixels of the liquid crystal display device 210 are vertically or horizontally distributed by Equation 2 above. Determine the Barrier Pitch. The non-transmissive area of the image display mask 220 is positioned between the sub-pixel representing the right image and the left image.

3 is a diagram illustrating an embodiment of an image display method according to the present invention.

A general 3D image is composed of various formats, but when displaying a 3D image using a lenticular or a Parallax Barrier, an odd numbered vertical line is shown as “310” of FIG. 3. The right image is displayed and the left image is displayed on the even-numbered vertical line. When the left and right images are configured as vertical lines as described above, only the green color values of the left and right images are exchanged with each other, as shown at 320 in FIG. 3. This is because the display direction for each color is different when displaying in units of sub-pixels. The green value exchange between the left and right images is performed by the image processor.

After the green value is exchanged between the left and right images by the 3D image processing unit, the 3D image processing unit displays the green value on the liquid crystal display device 210. In addition, when the image display mask 220 is positioned on the liquid crystal display device 210, a three-dimensional image display in units of sub-pixels is possible. This is shown in Figures 4a and 4b below.

4A or 4B illustrate another embodiment of an image display method according to the present invention.

FIG. 4A shows a display for the first horizontal line, ie color red, and FIG. 4B shows a display for the second horizontal line, ie color green.

In FIG. 4A, the odd-numbered “R1” is displayed in the left eye direction by the image display mask 220, and the even-numbered “R2” is displayed in the right eye direction. However, FIG. 4B has the opposite characteristics to FIG. 4A. That is, the odd-numbered "G2" is displayed in the right eye direction by the image display mask 220 and the even-numbered "G1" is displayed in the left eye direction by the image display mask 220. Therefore, when the color sub-pixels of the image display apparatus are positioned in the vertical direction, in order to display the 3D image in units of sub-pixels, the 3D left and right images are displayed in FIG. 3. It should consist of a color pattern such as 320 ". In addition, the liquid crystal display device and the image display mask should be configured as shown in FIG. 5A.

Meanwhile, the conventional 3D image such as "310" of FIG. 3 is converted into "320" of FIG. 3 by an image processing unit of a sub-pixel unit.

As described above, the image processing unit of a sub-pixel unit exchanges sub-pixel color values between even-numbered and left-right images in the vertical direction. However, the above image processing is not performed when displaying a 2D image.

5A or 5B are exemplary diagrams illustrating an image display mask pattern of an image display apparatus according to the present invention.

5A is a diagram illustrating a mask pattern in the vertical direction, and FIG. 5B is a diagram showing a mask pattern in the horizontal direction.

First, as shown in FIG. 5A, using a liquid crystal display device in which sub-pixels are configured in the vertical direction, a three-dimensional image in which the left and right images configured in the vertical direction are repeatedly configured in the horizontal direction. In order to display (Split 3D Image) in units of sub-pixels, horizontally even numbers with the upper second sub-pixel color value of odd-numbered pixels in the horizontal direction and odd-numbered pixels in the vertical direction. First, the first sub-pixel color value of the odd second pixel in the vertical direction and the second first sub-pixel color value of the even pixel in the horizontal direction are interchanged. And the upper first Sub-Pixel color values of the even-numbered pixels in the horizontal direction and the even-numbered pixels in the horizontal direction are interchanged with each other. The third sub-pixels (Sub-Pixel) the upper third of the sub-pixels in even-numbered even-numbered, the vertical direction and the horizontal direction to the color value - pixel (Sub-Pixel) changes a color value to each other.

Next, as shown in FIG. 5B, by using a liquid crystal display device configured with sub-pixels in a horizontal direction, a three-dimensional image in which the left and right images configured in the vertical direction are repeatedly configured in the horizontal direction. In order to display the Split 3D Image in sub-pixel units, the horizontal sub-pixel color values of the second sub-pixel color value of the odd-numbered pixels in the horizontal direction and the odd-numbered pixels in the vertical direction are used. The second sub-pixel color value of the odd-numbered pixel in the vertical direction is interchanged, and the first sub-pixel color value of the odd-numbered pixel in the horizontal direction and the even-numbered pixel in the vertical direction is horizontal. The first sub-pixel color values of the even-numbered pixels in the even direction and the even-numbered pixels in the vertical direction, and the third sub-pixels of the even-numbered pixels in the horizontal direction and the even-numbered pixels in the vertical direction. -Pixel) swaps between the color value and the third Sub-Pixel color value of the even-numbered pixels in the horizontal direction and the even-numbered pixels in the vertical direction.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention enables display of a three-dimensional image in a vertical or horizontal direction by using a liquid crystal display device and an image display mask.

In particular, the present invention enables the display of two-dimensional and three-dimensional images by using a variable image display mask that can be turned on and off, such as a TN panel. There is an effect that can display a three-dimensional image in the vertical direction.

1A or 1B is an exemplary explanatory diagram of an arrangement of sub-pixels representing colors of a typical liquid crystal display device.

2 is a configuration diagram of an image display apparatus according to an embodiment of the present invention.

3 is a diagram illustrating an embodiment of an image display method according to the present invention;

4A or 4B is another exemplary explanatory diagram of an image display method according to the present invention;

5A or 5B are exemplary views illustrating image display mask patterns of an image display apparatus according to the present invention.

* Explanation of symbols for the main parts of the drawings

210: liquid crystal display device 220: image display mask

Claims (13)

In the video display device, Image processing means for exchanging color values in sub-pixel units of the liquid crystal display means; Said liquid crystal display means for displaying an image by converting a sub-pixel from said image processing means; And Image display masking means attached to said liquid crystal display means for displaying a three-dimensional image. Image display device comprising a. The method of claim 1, The liquid crystal display means, When the sub-pixels are arranged vertically, the upper first sub- of the odd-numbered pixels in the horizontal direction and the odd-numbered pixels in the vertical direction in order to display a three-dimensional image in units of sub-pixels. Displays the right image on the pixel (Sub-Pixel), the left image on the second Sub-Pixel, and the right image on the third Sub-Pixel. Display the left image on the first sub-pixel of the even pixels, the right image on the second sub-pixel, and the left image on the third sub-pixel, horizontally. Image on the first sub-pixel, the image on the right on the second sub-pixel, and the third sub-pixel on the even-numbered, odd-numbered pixels in the vertical direction. Display the image on the left side in the horizontal direction, even numbered, vertical room Display the right image on the first sub-pixel of the even-numbered pixels, the left image on the second sub-pixel, and the right image on the third sub-pixel. Image display apparatus, characterized in that. The method of claim 1, The liquid crystal display means, When the sub-pixels are arranged horizontally, the first sub left of the odd-numbered pixels in the horizontal direction and the odd-numbered pixels in the vertical direction in order to display a three-dimensional image in units of sub-pixels. Displays the right image in the pixel (Sub-Pixel), the left image in the second Sub-Pixel, and the right image in the third Sub-Pixel. Display the left image on the first sub-pixel (Sub-Pixel), the right image on the second sub-pixel (Sub-Pixel), and the left image on the third sub-pixel (Sub-Pixel) of the even-numbered pixel. Left image on the first sub-pixel (left), right image on the second sub-pixel (sub-pixel), and third sub-pixel (sub-pixel) of even-numbered pixels in the horizontal direction and odd-numbered pixels in the vertical direction. ), And the left image is displayed in the horizontal direction. Display the right image on the first sub-pixel, the left image on the second sub-pixel, and the right image on the third sub-pixel of the even-numbered pixels. Image display apparatus, characterized in that. The method according to any one of claims 1 to 3, The video display masking means, And displaying a left image at a right image position and a right image at a left image position, and displaying an image displayed from the liquid crystal display means in a desired direction, such as a Parallax Barrier. The method of claim 4, wherein The parallax barrier (Barrier), An image display device, comprising a pattern similar to a chessboard. The method of claim 4, wherein The video display masking means, And a distance from the liquid crystal display means according to the following formula. [Equation] Where "g" is the distance between the liquid crystal display means and the image display masking means, "z" is the distance between the liquid crystal display means and the observer, and "i" is a sub-pixel of the liquid crystal display means. Pitch, and "e" is the observation width, which is the distance between two eyes of a human being.) The method of claim 4, wherein Barrier of the video display masking means, Pitch is calculated by the following equation. [Equation] (Where "b" is the barrier pitch of the image display masking means, "g" is the distance between the liquid crystal display means and the image display masking means, and "z" is the distance between the liquid crystal display means and the observer) And "i" represents the sub-pixel pitch of the liquid crystal display means, respectively.) The method of claim 7, wherein The video display masking means, A transmissive region and a non-transmissive region, wherein the transmissive region and the non-transmissive region are distributed in a diagonal direction with each other, and the non-transmissive region is distributed vertically or horizontally with a sub-pixel of the liquid crystal display means. The barrier pitch in the horizontal direction is determined by the equation, and is located between the sub-pixel representing the right image and the sub-pixel representing the left image. Image display apparatus, characterized in that. The method of claim 4, wherein The video display masking means, TN Panel or a device that can electronically turn on and off the light transmittance, but when displaying a two-dimensional image, the image display masking means is a front-transmissive two-dimensional image And to display the 3D image by adjusting the on / off of the image display masking means when the 3D image is displayed. In the image display method, A first step of exchanging color values between left and right images by an image processor; A second step of displaying color values on the liquid crystal display after the color values are exchanged between the left and right images by the image processor; And A third step of displaying a 3D image in a sub-pixel unit by placing an image display mask on the liquid crystal display device; Image display method comprising a. The method of claim 10, The first step is, Using the liquid crystal display device configured with a sub-pixel in a vertical direction, a split 3D image in which each of the left and right images configured in the vertical direction is repeatedly configured in the horizontal direction is sub-pixeld. To display in (Sub-Pixel) units, the upper second sub-pixel color value of the odd-numbered pixels in the horizontal direction and the odd-numbered pixels in the vertical direction, and the even-numbered pixels in the even and vertical directions in the horizontal direction. The upper second Sub-Pixel color values are swapped with each other, and the upper first Sub-Pixel color value of the odd-numbered horizontal and even-numbered pixels in the horizontal direction and the even-numbered, vertical direction in the horizontal direction Swaps the upper first sub-pixel color values of the even-numbered pixel with each other, and the upper third sub-pixel of the even-numbered pixel in the horizontal direction and the odd-numbered pixel in the vertical direction. And a color value and an upper third sub-pixel color value of even-numbered pixels in the horizontal direction and even-numbered pixels in the vertical direction. The method of claim 10, The first step is, By using the liquid crystal display device configured with a sub-pixel in a horizontal direction, a split 3D image in which each of the left and right images configured in the vertical direction is repeatedly configured in the horizontal direction is sub-pixeld. To display in (Sub-Pixel) units, the second Sub-Pixel color value of the odd-numbered pixels in the horizontal direction and the odd-numbered pixels in the vertical direction, and the second of the odd-numbered pixels in the horizontal direction and even-numbered in the vertical direction. Sub-Pixel color values are interchanged with each other and the first Sub-Pixel color value of the odd-numbered pixels in the horizontal direction and the even-numbered pixels in the vertical direction and even-numbered in the horizontal direction and even-numbered in the vertical direction The first Sub-Pixel color value of the pixels is swapped with each other, and the third Sub-Pixel color value of the odd-numbered pixels in the horizontal direction and the even-numbered pixels in the horizontal direction is changed in the horizontal direction. Be second, and the third sub-pixels of even-numbered vertically-image display method for a pixel (Sub-Pixel) color values, wherein each change. The method according to any one of claims 10 to 12, The third step, When displaying a 2D image by using a TN panel or a device capable of electronically turning on / off light transmission to the image display mask, the image display mask has a front transmissive type. And displaying a two-dimensional image, and when displaying the three-dimensional image, adjusting the on / off of the image display mask to view the three-dimensional image.