KR101787980B1 - Display Apparatus For Displaying Three Dimensional Picture - Google Patents

Abstract

The present invention relates to a display device, and more particularly to a display device in which a shape of a slit and a barrier constituting a parallax barrier used in a parallax barrier method for displaying a stereoscopic image is a shape having a constant angle with respect to a vertical line of a pixel formed on the display panel Dimensional image display device, which is inclined at a predetermined angle. To this end, a stereoscopic image display apparatus according to the present invention includes: a display panel having a plurality of left eye pixels and right eye pixels; And a parallax barrier in which a plurality of slits and a barrier are formed so as to selectively block the light emitted from the left eye pixel and the right eye pixel to divide the left eye image and the right eye image, And is inclined at a predetermined angle with the vertical line of the vertical line.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a three-

The present invention relates to a display device, and more particularly, to a stereoscopic image display device capable of displaying an image in three dimensions.

The stereoscopic image display apparatus displays stereoscopic images by using the appearance of perspective when different image signals recognized by the two eyes are synthesized.

A stereoscopic technique, a volumetric technique, and a holographic technique are known as methods for implementing the stereoscopic image.

Among them, binocular parallax can be classified into spectacles and non-eye glasses. Recently, no eye surgery has been actively studied.

1 is a cross-sectional view of a display panel and a parallax barrier applied to a conventional stereoscopic image display device.

There are a parallax barrier system and a lenticular lens system using a parallax barrier 20 as shown in Fig.

In the parallax barrier system, the parallax barrier 20 is used to selectively block the light emitted from the display panel 10 of the stereoscopic image display apparatus, thereby separating the left eye image L and the right eye image R Dimensional stereoscopic image.

In addition, the lenticular lens system realizes a three-dimensional stereoscopic image by separating a left eye image and a right eye image with a lenticular lens attached on the stereoscopic image display device.

That is, in the above-described non-eye-tightening method, the luminance distribution of the image seen by the observer is changed according to the position (A) of the viewer and the observer uses the principle that different images are displayed on the left and right eyes Thereby allowing stereoscopic images to be recognized.

A conventional 3D stereoscopic image display apparatus includes a 3D parallax barrier 20, a switchable lens, and a switchable lens 20 vertically disposed on a pixel of a display panel 10, Dimensional stereoscopic image by separating left and right images based on the viewing distance.

However, the conventional non-eye-tightening stereoscopic image display device has a problem that it has a narrow viewing angle due to the structure of a view map (display panel) and a 3D parallax barrier.

1 (a), the slit 21 and the barrier 22 constituting the parallax barrier 20 are in the same state as the alignment direction of the pixel formed on the display panel 10 1 (b), the left eye image L and the right eye image R outputted from the display panel 10 are transmitted through the slit 21 as shown in FIG. 1 (b) Since the image is transmitted only to a position within a certain range, there is a problem that a viewing angle at which an observer can recognize a stereoscopic image becomes narrow.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a parallax barrier for stereoscopic image display in which a shape of a slit and a barrier constituting a parallax barrier, Dimensional image display device which is inclined in the form of a three-dimensional image.

According to an aspect of the present invention, there is provided a stereoscopic image display apparatus including: a display panel having a plurality of left eye pixels and right eye pixels; And a parallax barrier in which a plurality of slits and a barrier are formed so as to selectively block the light emitted from the left eye pixel and the right eye pixel to divide the left eye image and the right eye image, And is inclined at a predetermined angle with the vertical line of the vertical line.

According to the above-mentioned solution, the present invention provides the following effects.

That is, since the shapes of the slits and the barrier constituting the parallax barrier used in the parallax barrier system for stereoscopic image display are inclined at a predetermined angle with respect to the vertical line of the pixels formed on the display panel, This has the effect of widening the viewing angle.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an exemplary view showing a cross section of a display panel and a parallax barrier applied to a conventional three-dimensional image display device. FIG.
2 is a diagram illustrating an exemplary configuration of a stereoscopic image display device according to the present invention.
Fig. 3 is an exemplary view showing the configuration of the display panel and the parallax barrier shown in Fig. 2 in plan and in cross-section. Fig.
4 is a graph comparing a viewing area of a stereoscopic image display device according to the present invention and a viewing area of a conventional stereoscopic image display device.

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

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

2, the stereoscopic image display apparatus according to the present invention is used for widening a viewing angle of a stereoscopic image. The stereoscopic image display apparatus includes a display panel 100 for displaying an image, A parallax barrier 140 for dividing the left eye image and the right eye image, a gate driver 130 for applying a scan pulse to the gate line of the display panel, and a controller 140 for applying digital video data RGB to a data line of the display panel And a timing controller 110 for controlling the data driver 120 and the data driver and the gate driver.

The stereoscopic image display device according to the present invention may be applied to a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescence device (EL) ), An electrophoretic display (EPD), or the like. However, for convenience of explanation, a liquid crystal display (LCD) will be described below as an example of the present invention.

First, the display panel 100 may be formed in various forms depending on what kind of flat panel display device the liquid crystal display device is as an example of the stereoscopic image display device according to the present invention. And a liquid crystal layer is formed between the substrates. In this case, the lower glass substrate of the display panel 100 includes a plurality of data lines D1 to Dm, a plurality of gate lines G1 to Gn crossing the data lines, data lines D1 to Dm, A plurality of TFTs (Thin Film Transistors) formed at intersections of the gate lines G1 to Gn, a plurality of pixel electrodes for charging the data voltage to the liquid crystal cells Clc, A storage capacitor (Cst) for maintaining the voltage of the storage capacitor CST, and the like are formed. Liquid crystal cells (called pixels or pixels) are arranged in a matrix form by the intersection structure of the data lines D1 to Dm and the gate lines G1 to Gn.

A black matrix BM, a color parallax barrier CF, a common electrode, and the like are formed on the upper glass substrate GLS1 of the display panel 100. [ The common electrode is formed on the upper glass substrate GLS1 in a vertical electric field driving method such as a TN (Twisted Nematic) mode and a VA (Vertical Alignment) mode. The common electrode is horizontally disposed on the upper glass substrate GLS1, such as an In Plane Switching (IPS) mode and a Fringe Field Switching And is formed on the lower glass substrate GLS2 together with the pixel electrode in the electric field driving method. Polarizing plates POL1 and POL2 are attached to the upper glass substrate GLS1 and the lower glass substrate GLS2 of the display panel 100 and an alignment film for forming a pretilt angle of the liquid crystal is formed on the inner surface in contact with the liquid crystal. A column spacer CS for maintaining a cell gap of the liquid crystal cell may be formed between the upper glass substrate GLS1 and the lower glass substrate GLS2 of the display panel 100. [

On the other hand, as described above, a plurality of pixels for displaying red, green, and blue are formed on the display panel. These pixels function as a parallax barrier to display a stereoscopic image, The pixels to display are separated. This will be described in detail with reference to Fig.

Next, the timing controller 110 receives a timing signal such as a data enable signal DE and a dot clock signal CLK to control the operation timings of the data driver 120 and the gate driver 130 Signals (GCS, DCS).

The control signal GCS for controlling the gate driver 130 includes a gate start pulse GSP, a gate shift clock GSC, a gate output enable signal GOE, Direction control signal DIR, and the like. The control signal for controlling the data driver 120 includes a source sampling clock (SSC), a polarity control signal (POL), and a source output enable (SOE) signal.

Next, the data driver 120 includes a plurality of data drive ICs (Source Integrated Circuits), and latches the digital video data RGB under the control of the timing controller 110. The data driver 120 converts the digital video data RGB to an analog positive / negative gamma compensation voltage to generate analog positive / negative pixel voltages and supplies them to the data lines D1 to Dm.

Next, the gate driver 130 includes one or more gate driver ICs to sequentially supply scan pulses (or gate pulses) to the gate lines G1 to Gn.

Finally, the parallax barrier 140 divides the left eye image and the right eye image by selectively blocking the light emitted from the display panel, thereby allowing the observer to recognize the stereoscopic image. As shown in FIG. 2, And is disposed at the top of the display panel 100.

Such a parallax barrier is formed of a slit and a barrier, and the light irradiated from the display panel can be received by the observer's eyes through the slit.

3, the slits and the barrier of the parallax barrier according to the present invention are inclined at an angle with respect to the arrangement direction of the pixels formed on the display panel.

Hereinafter, the configuration and function of the parallax barrier 140 according to the present invention will be described in detail with reference to FIG.

FIG. 3 is a plan view and a cross-sectional view of the structure of the display panel and the parallax barrier shown in FIG. 2, wherein (a) is a plan view, (b) (C) shows the direction of light irradiation at the center of the second horizontal line (2-layer) in the drawing shown in (a).

The stereoscopic image display apparatus according to the present invention uses a parallax barrier system using parallax barriers, in particular, in a no-eye-hardening mode, and uses a method of separating images directly from a display panel to form a field of view.

First, the structure of the display panel 100 for implementing the above-described method will be described.

That is, the parallax barrier system includes the parallax barrier 140 in which the slit 141 and the barrier 142 are formed in front of the image corresponding to the left and right eyes, And the stereoscopic images synthesized through the stereoscopic image are separated and observed, thereby realizing the stereoscopic effect.

To this end, a left-eye pixel L for displaying left-eye image information and a right-eye pixel R for displaying right-eye image information are alternately formed on the display panel 100.

3, the display panel 100 according to the present invention includes two right eye pixels R followed by one left eye pixel L ) Are formed alternately. In addition, when the second horizontal line 2layer adjacent to the first horizontal line is used as a reference, one right-eye pixel R is formed alternately after the two left-eye pixels L.

As shown in FIG. 3, the display panel according to the present invention includes a right-eye pixel R and a right-eye pixel R, when viewed from a vertical line formed by the pixels of the first horizontal line and the second horizontal line, And the left-eye pixels L are alternately formed.

On the other hand, in Fig. 3, ▨ indicates red, ▤ indicates green, and ▧ indicates blue.

The shape of the display panel 100 will be described in more detail with reference to an example shown in FIG.

3 (a) shows a part of the display panel 100 according to the present invention. In particular, pixels of red (), green (), and blue () 1 layer) and a second horizontal line (a second layer).

Here, in the first horizontal line, three pixels consisting of a right eye pixel 1R, a right eye pixel 2R, and a left eye pixel 1L are consecutively arranged from left to right.

In the second horizontal line, three pixels consisting of the left-eye pixel 1L, the left-eye pixel 2L and the right-eye pixel 1R are consecutively arranged in the left-to-right direction.

Accordingly, it can be seen that the right eye pixel R and the left eye pixel L are arranged alternately in the same vertical line of the display panel.

Next, the configuration of the parallax barrier 140 for implementing the above-described method will be described.

That is, the parallax barriers 140 are positioned between the display panel 100 and the observer to pass or block the light. In order to perform the function, a parallax barrier 140 is provided. Includes a slit 141 passing through the right eye pixel R and a light from the left eye pixel L and a barrier 142 blocking the eye so that the observer can recognize the three-dimensional stereoscopic image.

3 (a), the parallax barrier 140 applied to the present invention is configured such that the slit 141 and the barrier 142 are formed on the display panel 100 Are alternately alternately formed in a form having a constant angle (?) With the vertical line direction of the pixels.

The shape of the parallax barrier 140 will be described in more detail with reference to an example shown in FIG.

3 (a), the display panel 100 is composed of pixels of red (), green (), and blue (), and the parallax barriers 140, The slit 141 of the first horizontal line starts from the upper left of the second right eye pixel 2R of the first horizontal line and passes through the first slit line 141a ending at the lower right end of the third left eye pixel 3L of the second horizontal line, And a second slit line 141b starting from the upper left end of the first left-eye pixel 1L of the first horizontal line and ending at the lower right end of the fourth left-eye pixel 4L of the second horizontal line have. The light emitted from the display panel can pass through the slit 141.

The third slit line 141c starting from the left upper end of the fourth right eye pixel 4R of the first horizontal line and the fourth slit line 141d adjacent thereto are also arranged in the order of the first slit line and the second slit line So that another slit 141 is formed.

A barrier 142 for blocking light emitted from the display panel is formed between the second slit 141b and the third slit 141c.

Therefore, the slit 141 or the barrier 142 is inclined to have a certain angle? When compared with the pixels vertically aligned in the up, down, left, and right directions.

More specifically, as shown in FIG. 3A, the first slit line 141a intersects with a vertical line formed by the longitudinal axes of the first horizontal line and the second horizontal line of the display panel at a predetermined angle? ), And by this inclined angle, the slit can be aligned with each pixel of the display panel in the above-described arrangement.

A method for implementing a three-dimensional image by the stereoscopic image display apparatus according to the present invention will be described with reference to FIG.

3 (b) shows a first horizontal line 1layer and a parallax barrier 140 of the display panel 100 shown in Fig. 3 (a), and Fig. 3 The slit on the left side of the slit 141 is referred to as a first slit, and the slit on the right side is referred to as a second slit. That is, the first slit is a slit formed by the first slit line 141a and the second slit line 141b in FIG. 3 (a), and the second slit is a slit formed by the third slit line 141b in FIG. And a slit formed by the fourth slit line 141c and the fourth slit line 141d.

3B, light from the light emitted through the first horizontal line of the display panel toward the right eye of the observer is emitted from the right eye pixels 1R and 2R of the display panel and is incident on the parallax barrier, The light passing through the first slit 141 of the display panel 140 can reach the observer's position B and the light directed toward the observer's left eye among the light emitted through the first horizontal line of the display panel (1L) and pass through the first slit (141) of the parallax barrier (140) to reach the observer's position (B).

The light emitted from the right eye pixels 3R and 4R of the first horizontal line of the display panel passes through the second slit of the parallax barrier 140 to reach the position B of the observer And the light emitted from another left-eye pixel 2L of the first horizontal line of the display panel passes through the second slit of the parallax barrier 140 to reach the observer's position B .

3 (c) shows a second horizontal line 2layer and a parallax barrier 140 of the display panel 100 shown in FIG. 3 (a). The parallax barriers 140 are formed in a parallax barrier The left slit of the slit 141 is formed by the first slits 141a and 141b, and the right slit is formed by the second slits 141c and 141d.

3C, the light directed toward the right eye of the observer out of the light emitted through the second horizontal line of the display panel is emitted from the right eye pixel 1R of the display panel and passes through the parallax barrier 140 And the light directed toward the left eye of the observer among the light emitted through the first horizontal line of the display panel passes through the first slit 141 of the display panel to reach the position B of the observer, And 4L and pass through the first slit 141 of the parallax barrier 140 to reach the position B of the observer.

Further, the light emitted from another right eye pixel 2R of the second horizontal line of the display panel can pass through the second slit of the parallax barrier 140 to reach the position B of the observer , Light emitted from another left-eye pixels 5L and 6L (not shown in Fig. 3 (a)) of the second horizontal line of the display panel is transmitted to the second (left) pixel of the parallax barrier 140 The position B of the observer can be reached through the slit.

3 (c) shows the path of the light emitted from the right eye pixels R among the light emitted from the pixels of the first horizontal line. The dotted line emitted and displayed from 3L and 4L in c) indicates a state in which the light emitted from the third right eye pixel 3R and the fourth right eye pixel 4R of the first horizontal line passes through the second slit .

3, the stereoscopic image display device according to the present invention, which can be displayed as shown in FIGS. 3 (b) and 3 (c), is compared with the conventional stereoscopic image display device shown in FIG. 1, It can be seen that the light emitted from the left eye pixel or the right eye pixel can be emitted to a wider area by the slit 141 inclined at a constant angle, and thus the position of the observer capable of recognizing the three- B), that is, the viewing angle becomes wider.

3 (b) and 3 (c), the light irradiated from the display panel is irradiated to the center of the first horizontal line 1layer and the center of the second horizontal line 2layer, It can be seen that the two light layers arrive at different positions. As a result, it can be seen that the viewing angle increases in the horizontal direction.

In other words, in the conventional stereoscopic image display device shown in FIG. 1, a point where light emitted from the display panel arrives is limited to a certain region, but in FIGS. 3 (a) and 3 In the stereoscopic image display apparatus according to the present invention, the point where the light emitted from the display panel arrives is widely spread, which means that the viewing angle is increased.

In other words, according to the present invention as described above, the light ray from the right eye pixel R of the first horizontal line 1layer and the ray from the right eye pixel R of the second horizontal line 2layer Are brought out at different angles by the slit 141 of the parallax barrier 140. This allows the observer to recognize the right eye image in a wider area.

In addition, the light from the left eye pixel L of the first horizontal line and the light from the left eye pixel L of the second horizontal line also come out at different angles, . ≪ / RTI >

Accordingly, the observer can recognize the stereoscopic image in a wider area by recognizing the right-eye image and the left-eye image in a wider area, so that the stereoscopic image display device according to the present invention widens the viewing angle.

FIG. 4 is a graph comparing a viewing area of a stereoscopic image display device according to the present invention and a viewing area of a conventional stereoscopic image display device, wherein (a) is a graph showing a viewing area (viewing angle) of a conventional stereoscopic image display device (b) is a graph showing a viewing area (viewing angle) of the stereoscopic image display device according to the present invention.

That is, FIG. 4 is a graph showing a result of simulating a viewing angle in a conventional stereoscopic image display apparatus and a stereoscopic image display apparatus according to the present invention, with reference to 15.6 "HD, wherein a left view and a right view Normalized Luminance profile at detector plane (OVD 62.5 cm) for view 0.

4 (b), the viewing angle range of the stereoscopic image display device according to the present invention is wider than the viewing angle range of the conventional stereoscopic image display device.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Display panel 140: Parallax barrier
141: slit 141a: first slit line
141b: second slit line 141c: third slit line
141d: fourth slit line 142: barrier

Claims (7)

A display panel in which a plurality of left eye pixels and right eye pixels are formed; And
And a parallax barrier in which a plurality of slits and a barrier are formed to selectively block the light emitted from the left eye pixel and the right eye pixel to divide the left eye image and the right eye image,
Wherein the slit and the barrier are inclined at a predetermined angle with the vertical line of the pixels,
On the first horizontal line of the display panel, two right eye pixels (R) and one left eye pixel (L) are alternately formed,
And two left-eye pixels (L) and one right-eye pixel (R) are alternately formed on a second horizontal line adjacent to the first horizontal line. delete The method according to claim 1,
Wherein a right eye pixel (R) and a left eye pixel (L) are alternately formed on the same vertical line of the first horizontal line and the second horizontal line. The method according to claim 1,
Wherein the slit is inclined at a predetermined angle with the vertical line formed by the longitudinal axes of the first horizontal line and the second horizontal line,
And the light emitted from the display panel passes through the slit. The method according to claim 1,
Wherein the barrier is formed parallel to the slit,
Wherein the barrier does not allow light emitted from the display panel to pass therethrough. The method according to claim 1,
The left eye pixel and the right eye pixel are repeatedly formed on the same vertical line of the first horizontal line and the second horizontal line,
The slit
A first slit line starting from a left upper end of a second right eye pixel of the first horizontal line and ending at a lower right end of a third left eye pixel of the second horizontal line,
Eye pixel of the first horizontal line and the second slit line starting from the upper-left end of the first left-eye pixel of the first horizontal line and ending at the lower-right end of the fourth left-eye pixel of the second horizontal line. The method according to claim 6,
In another embodiment,
A third slit line starting from a left upper end of a fourth right eye pixel of the first horizontal line,
And a fourth slit line adjacent to the third slit with an interval between the first slit line and the second slit line,
The barrier includes:
And the third slit line is formed between the second slit line and the third slit line.

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