KR20150004028A - 3 dimensional stereography image displayable device - Google Patents

Abstract

The present invention provides a stereoscopic image display device capable of reducing three-dimensional vertical crosstalk. The stereoscopic image display device comprises: a liquid crystal display device including a liquid crystal panel and first and second polarizing plates formed on both outer surfaces of the liquid crystal panel to have transmission axes perpendicular to each other; a patterned retarder provided on the outer surface of the second polarizing plate and having first, second, and third polarization modulation patterns sequentially repeated in a stripe shape while changing a phase of λ/4; and polarizing eyeglasses to selectively transmit or block light passing through the patterned retarder according to the state of the light.

Description

[0001] The present invention relates to a stereoscopic image display device,

The present invention relates to a display device capable of realizing a stereoscopic image, and more particularly, to a stereoscopic image display device capable of realizing a stereoscopic image with reduced vertical crosstalk and improved vertical angle of view.

Generally, a liquid crystal display device is composed of two opposing electrodes and a liquid crystal layer formed therebetween. The liquid crystal molecules of the liquid crystal layer are driven by an electric field generated by applying a voltage to the two electrodes.

The liquid crystal molecules have polarizing properties and optical anisotropy. When the liquid crystal molecules are placed in the electric field, the charge in the liquid crystal molecules is concentrated on both sides of the liquid crystal molecules, and the molecular alignment direction is changed according to the electric field. The anisotropy means that the path of the emitted light and the polarization state are changed differently depending on the incident direction and the polarization state of the incident light due to the elongated structure of the liquid crystal molecules and the aforementioned molecular arrangement direction.

Accordingly, the liquid crystal layer exhibits a difference in transmittance due to the voltage applied to the two electrodes, and the two-dimensional image can be displayed by varying the difference between the pixels.

In recent years, a liquid crystal display device capable of realizing a stereoscopic image in response to the increase in demands of users for a liquid crystal display device capable of realizing a stereoscopic image and realizing a stereoscopic image has been developed.

Generally, a three-dimensional image representing a three-dimensional body is made by the principle of stereoscopic vision through two eyes. The binocular disparity that appears because the time difference of the two eyes, that is, A liquid crystal display device capable of displaying stereoscopic images has been proposed.

In describing stereoscopic images in a more detailed manner, the left and right eyes looking at the liquid crystal display device see different two-dimensional images, respectively. When these two images are transmitted to the brain through the retina, the brain fuses them exactly, The depth of the image and the sense of reality are reproduced. Such a phenomenon is usually referred to as stereography.

Techniques presented for displaying stereoscopic images in a device having a two-dimensional image display such as a liquid crystal display device include a stereoscopic image display using special glasses, a non-stereoscopic stereoscopic image display, and a holographic display method.

In the stereoscopic image display system using the special glasses, the polarizing glasses system using the vibration direction or the rotation direction of the polarized light, the time-division spectacle system alternately presenting the left and right images alternately, and the light of different brightness in the left / Which is the method of concentration difference.

In addition, the non-eye hardened stereoscopic image display system has a parallax barrier system in which an image can be separated and viewed through a vertical grid-like aperture in front of each image corresponding to the left and right eyes, A lenticular method using a lenticular plate in which a cylindrical lens is arranged in a stripe manner, and an integral photography method using a fly-eye lens plate.

Among them, a stereoscopic image display device using polarizing glasses is the most widely used.

1 is a view showing a stereoscopic image display apparatus using conventional polarizing glasses.

As shown in the drawing, a conventional stereoscopic image display device using polarized glasses includes a liquid crystal display device 10 for displaying an image, a pattern drifter 40 attached to the outer surface of the liquid crystal display device 10, , A transparent auxiliary substrate provided on the outer surface of the patterned retarder, and an image transmitted through the patterned retarder (40) from the liquid crystal display device (10). ).

First, the liquid crystal display device 10 includes an array substrate 15, a color filter substrate 20, a liquid crystal layer (not shown) interposed between the two substrates 15 and 20, (Not shown), and a backlight unit (not shown) on the outer surface of the first polarizer 25 (not shown) attached to the respective outer surfaces of the first and second polarizers 25 and 30. At this time, the polarization axes of the first and second polarizers 25 and 30 are perpendicular to each other.

The pattern driver 40 provided on the outer surface of the second polarizer 30 attached to the outer surface of the color filter substrate 20 may include a pixel driver The light emitted from the pixel region P through the second polarizing plate 30 is made to be in the right circularly polarized state and the pixel region P located in the even-numbered pixel line EL corresponds to the region P The birefringent material changing its phase internally is patterned so as to have a different directionality alternately for each pixel region P line so as to serve as a left circularly polarized state.

Therefore, according to the structure of the conventional stereoscopic image display apparatus 1 described above, after the liquid crystal display device 10 passes through the pattern driver 40, The right circularly polarized light is emitted from the region P and the left circularly polarized light is emitted from the pixel region P located in the even-numbered pixel line EL.

At this time, for the pixel region located in the odd-numbered pixel line OL in the liquid crystal display device 10, the left-eye image signal incident on the left eye of the user is divided into a pixel region P, the left-eye image signal, which is selectively right-circularly polarized through the polarizing glasses 45, is incident on the left eye of the user, and the right-eye image signal that is left- So that the stereoscopic image can be realized by allowing the stereoscopic image to be incident on the right eye of the user.

When the stereoscopic image display device using the liquid crystal display device is capable of switching between two-dimensional and stereoscopic images, and when it is not desired to view the stereoscopic image, the user can switch to the two-dimensional image viewing mode by simple signal manipulation and watch the 2D image.

2 is a cross-sectional view of a portion of a conventional stereoscopic image display apparatus, in which polarizing glasses and light traveling direction are shown together.

As shown in the figure, the conventional three-dimensional image display device 1 having the above-described configuration is provided with the pattern driver 40 for generating the right circular polarization state for each pixel line OL and EL of the liquid crystal display device 10 (Hereinafter, referred to as a first polarization modulation area A1) and a part that makes a left-handed polarization state (hereinafter referred to as a second polarization modulation area A2) A vertical crosstalk due to the mixture of the left eye image and the right eye image occurs when the stereoscopic image is out of the viewing angle range in which the stereoscopic image can be viewed, It is true.

That is, as shown in the figure, the left eye image signal from the odd-numbered pixel line OL of the liquid crystal display 10 is input to the first polarization modulation area A1 of the pattern drift The left circularly polarized light is incident on the right eye lens 45b of the polarizing glasses which selectively receives only the left circularly polarized light, There is a problem that the quality of the stereoscopic image display due to the mixing is lowered.

In order to solve this problem, the black matrix 21 is provided at the boundary between each pixel region (OL) and the pixel region (P) of the liquid crystal display device 10 to prevent image blurring. However, The width of the black matrix 21 required for normal two-dimensional image viewing and the width of the black matrix 21 for improving the vertical viewing angle when viewing a stereoscopic image are different.

The width of the black matrix for viewing the stereoscopic image with the upper and lower viewing angles improved is 1.5 to 3 times larger than the width of the black matrix required for viewing the two-dimensional image without occurrence of general color blurring. Therefore, When the width of the black matrix 21 is made large as shown in Fig. 3 (the drawing which is a drawing in which the width of the black matrix is increased as a sectional view of a part of the conventional stereoscopic image display device) The aperture ratio is lowered in the stereoscopic image realization. In particular, when the two-dimensional image is viewed, the aperture ratio is lowered compared to the conventional two-dimensional image display liquid crystal display device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a stereoscopic image display device capable of viewing two-dimensional and stereoscopic images without lowering the aperture ratio, And to provide a display device.

According to an aspect of the present invention, there is provided a stereoscopic image display device including a liquid crystal panel, and first and second polarizing plates formed on both outer sides of the liquid crystal panel, A liquid crystal display; A pattern reliader provided on the outer surface of the second polarizer plate and having first, second and third polarized light modulation patterns repeatedly changing in a stripe form by changing a phase of? / 4; And polarizing glasses selectively transmitting or blocking the light according to a state of light emitted through the patterned retarder.

Here, the liquid crystal panel may include a first substrate having gate lines and data lines crossing each other to define pixel regions, and each pixel region having a thin film transistor and pixel electrodes connected thereto; A second substrate facing the first substrate and having a color filter layer corresponding to the pixel region surrounded by the black matrix; And a liquid crystal layer interposed between the first and second substrates, wherein a plurality of pixel regions connected to the same gate wiring among the gate wirings are defined as pixel lines.

Wherein the first polarization modulation pattern corresponds to odd-numbered pixel lines of the liquid crystal panel, the third polarization modulation pattern corresponds to even-numbered pixel lines of the liquid crystal panel, and the second polarization modulation pattern corresponds to black And is formed in correspondence with the matrix.

The first and third polarization modulation patterns each have a width greater than or equal to 10% of the width of the pixel line, and the second polarization modulation pattern has a width of the black matrix Of a width of 20 to 40%.

And the first polarization modulation pattern has an optical axis of +45 degrees with respect to the transmission axis of the second polarizing plate, the third polarization modulation pattern has an optical axis of -45 degrees with the transmission axis of the second polarizing plate, And the pattern has an optical axis of 0 degrees or 90 degrees with respect to the transmission axis of the second polarizing plate.

At this time, when light polarized in one direction transmitted through the second polarizing plate transmits through the first polarization modulation pattern, the polarized light in one direction transmitted through the second polarizing plate becomes the left circularly polarized light, When the polarized light passes through the second polarized light modulation pattern, it becomes right circularly polarized light. When light polarized in one direction transmitted through the second polarizer passes through the second polarized light modulation pattern, Or polarized in a direction perpendicular to the state of passing through the second polarizing plate.

In addition, the second substrate includes the color filter layer and a common electrode on the entire surface.

The pixel electrode of the first substrate may be in the form of a bar and may include a common electrode which is spaced apart from the bar-shaped pixel electrode and has a bar shape. And a common wiring connected to the common electrode is formed.

In addition, the pixel electrodes provided on the first substrate are in the form of plates in each pixel region, and common electrodes are provided on the entire surface of the display region, overlapping with the pixel electrodes, with an insulating layer interposed therebetween. And a plurality of bar-shaped openings are provided for each pixel region on the insulating layer.

The polarizing glasses are characterized in that a polarizing film and a? / 4 phase film are provided on the left and right eye lenses, respectively.

The stereoscopic image display apparatus according to an embodiment of the present invention is characterized in that a pattern driver is provided with first and third polarization modulation patterns and an optical axis corresponding to or perpendicular to the transmission axis of the second polarizer in correspondence with the black matrix of the liquid crystal panel The image for the right eye and the image for the left eye which are finally incident on the left and right eyes of the user through the polarizing glasses can be reduced to 1/2 of the conventional stereoscopic image display device, .

Furthermore, the stereoscopic image display apparatus according to the embodiment of the present invention has the effect of improving the vertical viewing angle range for stereoscopic viewing by reducing the vertical crosstalk.

Further, since the black matrix provided in the liquid crystal display device is at the same level as the width of the black matrix provided in the liquid crystal display device used for viewing two-dimensional images in general, there is an effect of suppressing reduction of the aperture ratio at the time of viewing two- and three- .

1 is a view showing a stereoscopic image display apparatus using conventional polarizing glasses.
2 is a cross-sectional view of a portion of a conventional stereoscopic image display apparatus.
3 is a cross-sectional view of a portion of a conventional stereoscopic image display device, in which the width of a black matrix is increased.
4 is a view illustrating a stereoscopic image display apparatus according to an embodiment of the present invention.
5 is a sectional view of a stereoscopic image display apparatus according to an embodiment of the present invention.
6 is a schematic cross-sectional view of a liquid crystal display device, which is a component included in the stereoscopic image display device according to the embodiment of the present invention
7 is a graph simulating a vertical viewing angle of a stereoscopic image display apparatus and a conventional stereoscopic image display apparatus according to an embodiment of the present invention.

Hereinafter, a configuration of a stereoscopic image implementation system according to the present invention will be described in detail with reference to the drawings.

4 is a view illustrating a stereoscopic image display apparatus according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view illustrating a stereoscopic image display apparatus according to an exemplary embodiment of the present invention.

3, the stereoscopic image display apparatus 100 according to an exemplary embodiment of the present invention includes a liquid crystal display device 110 for displaying an image having first and second polarizing plates 125 and 130 on both outer sides thereof, A pattern reliader 140 disposed on the outer surface of the second polarizer 130 of the liquid crystal display device 110 and having first to third polarized braid areas 140a, 140b and 140c, And polarizing glasses 145 for selectively transmitting light and left-handed circularly polarized light.

The components of the stereoscopic image display device according to the embodiment of the present invention will be described in more detail.

6 is a schematic cross-sectional view of a liquid crystal display device, which is a component included in a stereoscopic image display device according to an embodiment of the present invention.

The liquid crystal display device 110 includes an array substrate 115 and a color filter substrate 120 and a liquid crystal panel 112 (not shown) formed of a liquid crystal layer (not shown) interposed between the two substrates 115 and 120 First and second polarizers 125 and 130 attached to the outer surface of the liquid crystal panel 112 and a backlight unit (not shown) on the outer surface of the first polarizer 125, As shown in FIG.

In the liquid crystal panel 112, gates and data lines (not shown in FIGS. 3 and 230) for defining a plurality of pixel regions P intersect each other are provided on the array substrate 115, which is a constituent element of the liquid crystal panel 112 have.

Each pixel region P of the array substrate 115 is provided with a thin film transistor Tr which is connected to the gate wiring (not shown) and the data wiring 230 and is a switching element.

The thin film transistor Tr includes a gate electrode 205, a gate insulating layer 210, and a semiconductor layer 220, which are sequentially stacked, and are spaced apart from each other by a source electrode 233 and a drain electrode 236 In this case, the semiconductor layer 220 may have a structure of an ohmic contact layer 220b of impurity amorphous silicon spaced apart from the active layer 220a of pure amorphous silicon, Or may be a semiconductor layer (not shown).

When the semiconductor layer 220 is an oxide semiconductor layer, an etch stopper may be further formed on the central portion of the oxide semiconductor layer as an insulating material. The source and drain electrodes may be spaced apart from each other on the etch stopper, As shown in FIG.

Each pixel region P is provided with a pixel electrode 119 electrically connected to the drain electrode 236 of the thin film transistor Tr and having a plate shape.

On the other hand, the color filter substrate 120, which is another component of the liquid crystal panel 112, is provided with a black matrix 121 corresponding to the boundary of each pixel region P, Color filter patterns 122a, 122b and 122c of four colors of white color filter patterns (not shown) are formed in addition to the red, green and blue color filter patterns 122a, 122b and 122c or the three color filter patterns 122a, And a common electrode 270 covering the color filter layer 122. The common electrode 270 is formed on the entire surface of the color filter layer 122,

At this time, in the color filter substrate 120, the boundary of the red, green, blue (and white) color filter patterns 122a, 122b and 122c and more precisely, The black matrix 121 has a first width. In this case, the first width is the same size as that of the black matrix provided in the liquid crystal display panel for general two-dimensional viewing.

The liquid crystal panel 112 including these components can be variously modified in accordance with the driving mode of the liquid crystal display device 110.

That is, in the liquid crystal panel 112 of the liquid crystal display device 110 according to the embodiment of the present invention, the common electrode 270 is formed on the entire surface of the color filter substrate 120. However, The common electrode 270 provided on the front surface of the filter substrate 120 is omitted from the color filter substrate 120 and the pixel electrode 119 is alternately arranged in each pixel region P of the array substrate 115 .

In this case, the array substrate 115 is further provided with common wiring lines (not shown) spaced apart from the gate wiring lines (not shown) and electrically connected to the common wiring lines A plurality of pixel electrodes (not shown) and common electrodes (not shown) alternating in each pixel region P are formed in a bar shape, and the liquid crystal panels having such a structure are adjacent to each other And is driven by a horizontal electric field that is developed between a pixel electrode (not shown) in the form of a bar and a common electrode (not shown).

As another example, the common electrode 270 provided on the array substrate 115 is formed on the entire surface of the display region, and the pixel electrode (not shown) has a plate shape in each pixel region P, And may be connected to a drain electrode (not shown) of the thin film transistor Tr.

In this case, the pixel electrode (not shown) and the common electrode (not shown) are formed on the lower and upper portions of the insulating layer (not shown) with an insulating layer (not shown) therebetween, (Not shown) of the pixel electrode (not shown) are provided with a plurality of openings (not shown) having a bar shape corresponding to each pixel region P Feature.

A liquid crystal panel having an array substrate having such a configuration includes a pixel electrode and a common electrode located at upper and lower sides, and a fringe (not shown) generated by a plurality of bar-shaped openings (not shown) Field.

4, 5 and 6, for convenience of description, a plurality of pixel regions P connected to the same gate line 116 among a plurality of pixel regions P provided in the liquid crystal panel 112 In the embodiment of the present invention, a video signal applied to the left eye of a user for implementing a stereoscopic image among the plurality of pixel lines OL and EL is an odd-numbered pixel line OL, And an image signal applied to the right eye of the user is expressed through an even-numbered pixel line EL.

At this time, a black matrix 121 is provided between neighboring pixel lines OL and EL to form a boundary between the pixel lines OL and EL.

On the other hand, in the embodiment of the present invention, the odd-numbered pixel line OL describes the left eye image and the even-numbered pixel line EL displays the right eye image, It is obvious that the even-numbered pixel line EL may display the left-eye image.

The first and second polarizers 125 and 130 are formed on the outer side of the liquid crystal panel 112 having such a configuration so that the transmission axes of the liquid crystal panel 112 and the first polarizer 125 are perpendicular to each other. And a backlight unit (not shown) is provided on the liquid crystal display device 110 to form a liquid crystal display device 110.

Meanwhile, in the stereoscopic image display apparatus 101 according to an embodiment of the present invention, the pattern drifting unit 140 is provided on the outer surface of the second polarizing plate 130 as one of the most characteristic structures.

The pattern reliader 140 may include a first phase modulation pattern 140a having a first width and a second phase modulation pattern 140b having a birefringent property such as a reactive mesogen material, A second phase modulation pattern 140b having a first width and a third phase modulation pattern 140c having a first width and the three phase modulation patterns 140a, 140b, As shown in FIG.

The first width is equal to the width of the pixel lines OL and EL provided in the liquid crystal panel 112 or is at most 10% or less of the width of the pixel lines OL and EL , And the second width is about 20 to 40% of the width of the black matrix 121 provided on the liquid crystal panel 1125.

The first and third phase modulation patterns 140a and 140c may have an optical axis of +45 degrees and -45 degrees with respect to the transmission axis of the second polarizer 130, or may have an angle of -45 degrees and +45 degrees, respectively, The liquid crystal panel 112 has a function of changing the phase by? / 4 with respect to the light incident through the second polarizer 130 by being arranged so as to have an angle of? And are arranged corresponding to any one of the pixel lines OL and EL among the pixel lines EL.

The first and third phase modulation patterns 140a and 140c having such a configuration are formed by the left and right (or left and right) polarized lights with respect to the light polarized in one direction passing through the second polarizer 130 It is a function of modulating.

The second phase modulation pattern 140b having a second width between the first and third phase modulation patterns 140a and 140c has an optical axis that is different from the transmission axis of the second polarizer 130 Or 90 degrees so that the light transmitted through the second polarizing plate 130 does not form a left or right circularly polarized state but is polarized in a direction imparted by passing through the second polarizing plate 130 And keeps it as it is.

That is, in the patterned retarder 140 having the above-described structure, the light transmitted through the first phase modulation pattern 140a with respect to the light polarized in one direction transmitted through the second polarizer 130 is a The first phase modulation pattern 140a and the third phase modulation pattern 140c are circularly polarized, and the light passing through the third phase modulation pattern forms a right circularly polarized state. Further, And the light passing through the second phase modulation pattern 140b is linearly polarized in one direction or in a direction perpendicular to the one direction.

Therefore, the pattern delitters (OL) corresponding to the odd-numbered pixel lines OL among the light emitted from the pixel regions P located in the odd-numbered pixel lines OL of the liquid crystal display device 110 The light passing through the first phase modulation pattern 140a of the first phase modulation pattern 140 becomes a left circularly polarized state and the light from the pixel region P located in the even- The light passing through the third phase modulation pattern 140c of the pattern reliader 140 located corresponding to the EL light source 140 becomes a left circularly polarized state.

At this time, for the pixel region P located in the odd-numbered pixel line OL in the liquid crystal display device 110, the left-eye image signal incident on the left eye of the user is positioned in the even-numbered pixel line EL And a right eye image signal input to the right eye is applied to the pixel region (P), thereby realizing a stereoscopic image.

On the other hand, a part of the light emitted from the pixel region P located in the odd-numbered pixel line OL of the liquid crystal display device 110 is divided into the patterned riters Not the first phase modulation pattern 140a of the first phase modulation pattern 140 but the second phase modulation pattern 140b formed adjacent to the first phase modulation pattern 140a, The light passing through the phase modulation pattern 140b maintains the linearly polarized state of the light transmitted through the second polarizer 130. The linearly polarized light is transmitted through the left and right eye lenses 145a, 145b.

A part of the light from the pixel region P located in the even-numbered pixel line EL is divided into a third portion of the pattern drifter 140 positioned corresponding to the even- The second phase modulation pattern 140b passes through the second phase modulation pattern 140b formed adjacent to the third phase modulation pattern 140c instead of passing through the phase modulation pattern 140c. The transmitted light maintains the linearly polarized state of the light transmitted through the second polarizer 130. The linearly polarized light is also incident on the left eye and right eye lenses 145a and 145b of the polarizing glasses 145 .

The light incident on the polarizing glasses 145 in the state of being linearly polarized does not pass through the left and right eye lenses 145a and 145b but passes through the left and right lenses 145a and 145b, As shown in FIG.

Since this is due to the characteristic features of the polarized glasses 145, the configuration of the polarized glasses 145 will first be described.

On the other hand, the polarizing glasses 145 constituting one set of the liquid crystal display device 110 including the pattern-driven retarder 140 having the above-described configuration are formed of polarizing films 147a, 147b and? / 4 retardation films 146a, 146b are attached.

The left eye lens 145a corresponding to the left eye of the user when the polarizing glasses 145 is worn is provided with a first lambda / 4 phase film 146a for converting circularly polarized light into linearly polarized light, And a second? / 4 phase film 146b and a second polarizing film 147b are attached to the right eye lens 145b to selectively convert circularly polarized light into linear polarized light have.

Accordingly, when the user wears the polarized glasses 145 having such a configuration and the image data for the left eye and the right eye are alternately applied to the pixel lines OL and EL and the circularly polarized light state When the user views the image through the liquid crystal display device 110 displaying the image having the left eye polarized light 145a, the left eye polarized image is transmitted through the left eye lens 145a and the left eye polarized light is transmitted through the right eye polarized light 145b through the right eye lens 145b. The right eye image is incident on the stereoscopic image, so that the user can view the stereoscopic image by synthesizing the two images.

Meanwhile, as described above, the left-handed or right-handed polarized light is transmitted through only the left-eye polarized light through the polarizing glasses 145, while the right-eye lens 145b selectively transmits only the right- In this case, the left eye image is input to the left eye of the user and the right eye image is input to the right eye, thereby allowing the user to view a stereoscopic image of high quality.

Alternatively, the light emitted from the odd-numbered pixel line OL may pass through the second polarization modulation pattern 140b of the pattern drifter 140 due to the difference in incident angle of the light emitted from the liquid crystal display device 110, or alternatively, When light emitted from the even-numbered pixel lines EL passes through the second polarization modulation pattern 140b of the pattern drifting unit 140, the polarizing glasses 145 are maintained in a linearly polarized state in one direction No selective transmission is made.

Therefore, the light in the linearly polarized state passes through both the left eye and the right eye lenses 145a and 145b of the polarizing glasses 145. By the light characteristics in the linearly polarized state, The circular polarized light is formed by the first and second? / 4 phase films 146a and 146b provided on the right eye lenses 145a and 145b, respectively, Half of the incident light is blocked by the first and second polarizing films 147a and 147b, and only about 1/2 of the light is transmitted.

In this case, the right eye image incident on the left eye of the user is at a level of 1/2 of the conventional stereoscopic display apparatus, and the left eye image incident into the right eye of the user is also a level of 1/2 of the conventional stereoscopic display apparatus.

Therefore, the stereoscopic image display device 100 according to the embodiment of the present invention having the above-described structure can be configured to include the first and third polarization modulation patterns 140a and 144c in the pattern driver 140, The second polarized light modulation pattern 140b having the optical axis aligned with the transmission axis of the second polarizer 130 or corresponding to the transmission axis of the black matrix 121 of the polarizer glasses 112 is finally provided, The left and right eye images incident on the left and right eyes can be reduced to half the level of the conventional stereoscopic image display device 1 (FIG. 2), thereby improving stereoscopic image display quality.

Furthermore, the stereoscopic image display apparatus 100 according to the embodiment of the present invention has an effect of improving the vertical viewing angle range for stereoscopic viewing.

A viewing angle in a vertical direction capable of viewing an image in which blending (stereoscopic crosstalk) of a left eye and a right eye image of a light incident on a user's eye at the time of stereoscopic viewing is 10% or less is generally defined as a vertical viewing angle have.

The stereoscopic image display apparatus 100 according to the embodiment of the present invention includes a first polarized light modulation pattern 140a and a second polarized light modulation pattern 140b having a width of about 40% And the modulation pattern 140b is provided so that the stereoscopic image having the pattern reliader (40 in Fig. 2) having only the two polarization modulation patterns of the first and third polarization modulation patterns without the second polarization modulation pattern 140b Since the degree of mixing of the left eye and the right eye image is reduced to 1/2 as compared with the display device (1 of FIG. 2), the range of the upper and lower viewing angles in which the left eye and right eye image are mixed can be extended, The viewing angle is improved.

FIG. 7 is a graph simulating a vertical viewing angle of a conventional stereoscopic image display apparatus according to an embodiment of the present invention. The horizontal axis indicates the vertical viewing angle range, and the vertical axis indicates the vertical crosstalk occurrence rate And the maximum allowable value of the solid crosstalk is 10%). In this case, the + mark in the vertical viewing angle indicates the lower viewing angle with respect to the front face, and the upper viewing angle with the front face - indicates the lower viewing angle with respect to the front face.

As shown in the figure, in the case of the conventional stereoscopic image display device having the pattern reliader composed of only two phase modulation patterns, it is understood that the vertical viewing angle range at the maximum allowable stereoscopic crosstalk value of 0.1 is about 16.9 degrees have.

However, in the stereoscopic image display apparatus according to the embodiment of the present invention having the pattern-type retarder including the three phase modulation patterns, the vertical viewing angle at the maximum allowable stereoscopic crosstalk value of 0.1 is about 20.1 degrees .

Therefore, it can be seen that the vertical viewing angle range for stereoscopic image viewing of the stereoscopic image display apparatus according to the embodiment of the present invention is improved by 19% compared to the conventional stereoscopic image display apparatus.

Meanwhile, in the stereoscopic image display device according to the embodiment of the present invention having such a configuration, the width of the black matrix provided in the liquid crystal display device is the same as the width of the black matrix provided in the liquid crystal display device used for viewing two- There is an effect of suppressing the reduction of the aperture ratio at the time of viewing two-dimensional and three-dimensional images.

The present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the spirit of the present invention.

100: stereoscopic image display device
110: liquid crystal display
115: array substrate
120: Color filter substrate
125: first polarizer plate
130: second polarizer plate
140: patterned retarder
140a, 140b and 140c: first, second and third polarization modulation patterns
145: polarized glasses
145a, 145b: a left and right lens
146a, 146b: first and second lambda / 4 phase films
147a and 147b: first and second polarizing films

Claims (10)

A liquid crystal display comprising: a liquid crystal panel; and first and second polarizing plates having transmission axes perpendicular to each other on both outer sides of the liquid crystal panel;
A pattern reliader provided on the outer surface of the second polarizer plate and having first, second and third polarized light modulation patterns repeatedly changing in a stripe form by changing a phase of? / 4;
And polarizing glasses for selectively transmitting or blocking the light according to a state of light emitted through the patterned retarder
And a display unit for displaying the stereoscopic image.
The method according to claim 1,
In the liquid crystal panel,
A first substrate having a gate wiring and a data wiring crossing each other and defining a pixel region, each pixel region including a thin film transistor and a pixel electrode connected thereto;
A second substrate facing the first substrate and having a color filter layer corresponding to the pixel region surrounded by the black matrix;
And a liquid crystal layer interposed between the first and second substrates, wherein a plurality of pixel regions connected to the same gate wiring among the gate wirings are defined as pixel lines.
3. The method of claim 2,
Wherein the first polarization modulation pattern corresponds to odd-numbered pixel lines of the liquid crystal panel, the third polarization modulation pattern corresponds to even-numbered pixel lines of the liquid crystal panel, and the second polarization modulation pattern corresponds to black Wherein the matrix is formed corresponding to the matrix.
The method of claim 3,
Wherein the first and third polarization modulation patterns each have a width that is equal to or greater than a width of the pixel line in a range of 10%
And the second polarization modulation pattern has a width of 20 to 40% of the width of the black matrix.
The method according to claim 1,
Wherein the first polarization modulation pattern has an optical axis of +45 degrees to the transmission axis of the second polarizer,
Wherein the third polarization modulation pattern has an optical axis of -45 degrees with the transmission axis of the second polarizer,
And the second polarization modulation pattern has an optical axis of 0 degrees or 90 degrees with respect to the transmission axis of the second polarizer.
6. The method of claim 5,
When the light polarized in one direction transmitted through the second polarizing plate transmits the first polarization modulation pattern, it becomes a left circularly polarized light,
When light polarized in one direction transmitted through the second polarizing plate transmits the third polarized light modulation pattern, it becomes right circularly polarized light,
When light polarized in one direction transmitted through the second polarizing plate passes through the second polarizing modulation pattern, the second polarizing plate is maintained in a state of being transmitted through the second polarizing plate or in a direction perpendicular to a state of passing through the second polarizing plate Polarized state of the three-dimensional image.
3. The method of claim 2,
Wherein the second substrate is covered with the color filter layer and a common electrode is provided on the front surface.
3. The method of claim 2,
The pixel electrode of the first substrate may be in the form of a bar and may include a common electrode which is spaced apart from the bar-shaped pixel electrode and has a bar shape. And a common wiring line spaced apart from the common electrode and connected to the common electrode is formed.
3. The method of claim 2,
Wherein the pixel electrode of the first substrate is in the form of a plate in each pixel region, and the pixel electrode overlaps the pixel electrode, and a common electrode is provided on the entire surface of the display region with an insulating layer interposed therebetween, Wherein a plurality of bar-shaped openings are provided for each pixel region.
The method according to claim 1,
Wherein the polarizing glasses are each provided with a polarizing film and a? / 4 phase film on the left and right eye lenses.

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