KR20130012672A - Stereoscopic image display device and driving method thereof - Google Patents

Abstract

PURPOSE: A stereoscopic image display device and a driving method thereof are provided to sample inputted three-dimensional image data in left eye image data and right eye image data, select a lookup table according to a coordinate value, and compensate for a three-dimensional crosstalk. CONSTITUTION: A data sampling unit(141) samples left eye image data and right eye image data of three-dimensional image data. A LUT(LookUp Table) selecting unit(142) determines whether to select which lookup table according to a coordinate value. A data converter(143) selects one of first to kth lookup tables stored in a memory(144) according to a logic signal. The data converter converts the left eye image data and right eye image data of a corresponding coordinate value by using the selected lookup table. A three-dimensional formatting unit(145) outputs three-dimensional image data.

Description

Stereoscopic Display and Driving Method {STEREOSCOPIC IMAGE DISPLAY DEVICE AND DRIVING METHOD THEREOF}

The present invention relates to a stereoscopic display device and a driving method thereof capable of improving 3D crosstalk.

The stereoscopic image display apparatus is divided into a binocular parallax technique and an autostereoscopic technique. The binocular parallax method uses a parallax image of the left and right eyes with a large stereoscopic effect, and there are glasses and no glasses, both of which are put to practical use. The spectacle method includes a pattern retarder method in which a polarization direction of a left and right parallax image is displayed on a direct view display device or a projector and a stereoscopic image is realized using polarized glasses. In addition, the glasses method is a shutter glasses method that time-divisionally displays left and right parallax images on a direct-view display device or a projector and implements a stereoscopic image using a liquid crystal shutter glasses. In the autostereoscopic method, an optical plate such as a parallax barrier and a lenticular lens is generally used to realize a stereoscopic image by separating an optical axis of a parallax image.

When the left eye image is input to the right eye or the right eye image is input to the left eye due to a technical problem in the glasses type stereoscopic display device, the user may display a 3D cross in which the right eye image overlaps the left eye image or the left eye image overlaps the right eye image. You will feel the crosstalk. As a method of compensating for 3D crosstalk, a method of converting input image data using a look-up table is known.

1 illustrates an angle between a user and a display panel according to a position of the display panel. Referring to FIG. 1, 3D crosstalk is measured based on a case where a user USER views the display panel DIS at a vertical angle, and a look-up table for compensating for 3D crosstalk is a measured 3D cross. It is designed based on torque. That is, since the 3D crosstalk is measured based on the case where the user USER views the area (A) of the display panel DIS, the user USER views the area (A) of the display panel DIS. Due to the compensation of 3D crosstalk, it is hard to feel 3D crosstalk. However, when the user USER views the areas (B), (C), (D) and (E) of the display panel DIS, 3D crosstalk is not compensated properly because it is different from the measured 3D crosstalk. Therefore, 3D crosstalk is felt. That is, a difference occurs in the degree to which the user USER senses 3D crosstalk for each area of the display panel DIS, and the difference increases as the distance between the user USER and the display panel DIS increases. The larger (DIS) becomes, the larger it becomes.

The present invention provides a stereoscopic image display device and a driving method thereof capable of improving 3D crosstalk in all areas of a display panel.

According to an exemplary embodiment of the present invention, a stereoscopic image display device includes: a display panel including a plurality of pixels intersecting data lines and gate lines and formed in a cell region defined by an intersection of the data lines and gate lines; 3D image data input in 3D mode is sampled into left eye image data and right eye image data, and a look-up table is selected according to coordinate values to convert the left eye image data and right eye image data, and the converted left eye image data and right eye An image quality improving unit for converting image data into a 3D format; A data driver converting the 3D image data converted by the image quality improving unit into a data voltage and outputting the data voltage to the data lines; And a gate driver configured to sequentially output gate pulses synchronized with the data voltages to the gate lines.

The stereoscopic image display device of the present invention includes a stereoscopic image display device including a display panel including a plurality of pixels formed in a cell region defined by intersections of data lines and gate lines, and crossing the data lines and gate lines. In 3D, 3D image data input in the 3D mode is sampled into left eye image data and right eye image data, and a look-up table is selected according to coordinate values to convert the left eye image data and right eye image data, and the converted left eye image Converting the data and the right eye image data into a 3D format; Converting the converted 3D image data into a data voltage to output the data lines; And sequentially outputting gate pulses synchronized with the data voltage to the gate lines.

The present invention samples 3D image data input into left eye image data and right eye image data, and selects a look-up table according to coordinate values to compensate for 3D crosstalk. As a result, the present invention can compensate for 3D crosstalk by using a look-up table optimized for each area of the display panel, thereby improving 3D crosstalk in all areas of the display panel.

1 illustrates an angle between a user and a display panel according to a position of the display panel.
2 is a block diagram schematically illustrating a stereoscopic image display device according to an exemplary embodiment of the present invention.
3 is a block diagram illustrating in detail the image quality improving unit of FIG. 2.
4 is a flowchart illustrating a method of improving an image quality of an image quality improving unit according to an exemplary embodiment of the present invention.
5A and 5B are exemplary views illustrating an input image and a sampled monocular image.
6 is a diagram illustrating an example of an area of a display panel.
7A is a diagram illustrating an example of a 3D format method of a shutter glasses type or an active retarder type.
7B is a diagram illustrating an example of a 3D format method using a pattern retarder method.
8 is a flowchart illustrating an example of a look-up table selection method of the look-up table selecting unit of FIG. 3.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. Component names used in the following description may be selected in consideration of ease of specification, and may be different from actual product part names.

2 is a block diagram schematically illustrating a stereoscopic image display device according to an exemplary embodiment of the present invention. The stereoscopic image display device of the present invention is a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an organic light emitting diode (Organic Light Emitting) Diodes, OLEDs), and the like. Although the present invention has been exemplified by the liquid crystal display device in the following embodiment, it should be noted that the present invention is not limited to the liquid crystal display device. In addition, the stereoscopic image display apparatus of the present invention may be implemented as a glasses method using binocular disparity, such as a shutter glass method, a pattern retarder method, an active retarder method.

Referring to FIG. 2, the stereoscopic image display apparatus of the present invention includes the display panel 10, the stereoscopic glasses 20, the gate driver 110, the data driver 120, the timing controller 130, and the image quality improvement unit 140. , Host system 150, and the like.

The display panel 10 displays an image under the control of the timing controller 130. In the display panel 10, a liquid crystal layer is formed between two glass substrates. The data lines D and the gate lines G (or scan lines) intersect each other on the lower glass substrate of the display panel 10, and may be disposed on the data lines D and the gate lines G. In the cell regions defined by the TFT array, a TFT array in which pixels are arranged in a matrix form is formed. Each pixel of the display panel 10 is connected to a thin film transistor and is driven by an electric field between the pixel electrode and the common electrode.

A color filter array including a black matrix, a color filter, a common electrode, and the like is formed on the upper glass substrate of the display panel 10. The common electrode is formed on the upper glass substrate in a vertical electric field driving method such as twisted nematic (TN) mode and vertical alignment (VA) mode, and a horizontal electric field driving such as IPS (In Plane Switching) mode and FFS (Fringe Field Switching) mode. In the method, the pixel electrode is formed on the lower glass substrate. The liquid crystal mode of the display panel 10 may be implemented in any of the liquid crystal modes as well as the above-described TN mode, VA mode, IPS mode, and FFS mode.

An upper polarizer is attached to the upper glass substrate of the display panel 10, and a lower polarizer is attached to the lower glass substrate. The light transmission axis of the upper polarizer and the light transmission axis of the lower polarizer are perpendicular to each other. In addition, an alignment film for setting a pre-tilt angle of the liquid crystal is formed on the upper glass substrate and the lower glass substrate. A spacer is formed between the upper glass substrate and the lower glass substrate of the display panel 10 to maintain a cell gap of the liquid crystal layer.

As the display panel 10, a transmissive liquid crystal display panel that modulates light from the backlight unit may be selected. The backlight unit includes a light source, a light guide plate (or diffusion plate), and a plurality of optical sheets that are turned on in accordance with a driving current supplied from the backlight unit driving unit. The backlight unit may be implemented as a direct type backlight unit or an edge type backlight unit. The light sources of the backlight unit may include one of a hot cathode fluorescent lamp (HCFL), a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), a light emitting diode (LED), or two or more light sources. .

The backlight unit driver generates a driving current for turning on light sources of the backlight unit. The backlight unit driver turns on / off a driving current supplied to the light sources under the control of the backlight controller. The backlight controller outputs the backlight control data in which the backlight brightness and the lighting timing are adjusted according to the global / local dimming signal DIM input from the host system in the SPI (Serial Pheripheral Interface) data format.

In the shutter glasses method, the stereoscopic glasses 20 are implemented as shutter glasses, and the display panel 10 displays the left eye image and the right eye image by time division. In this case, only the left eye shutter of the stereoscopic glasses 20 is opened during the period in which the left eye image is displayed on the display panel 10, and only the right eye shutter is opened during the period in which the right eye image is displayed. Therefore, the user can watch a stereoscopic image by binocular disparity.

In the case of the pattern retarder method, the stereoscopic glasses 20 are implemented as polarized glasses, and the display panel 10 displays the left eye image on the odd line and the right eye image on the even line. The left eye image is converted into a first circular polarized light through the first retarder of the pattern retarder, and the right eye image is converted into a second circular polarized light through the second retarder of the pattern retarder. The first circularly polarized light passes through the left eye filter of the stereoscopic glasses 20, and the second circularly polarized light passes through the right eye filter of the stereoscopic glasses 20. Therefore, the user can watch a stereoscopic image by binocular disparity.

In the active retarder method, the stereoscopic glasses 20 are implemented as polarized glasses, and the display panel 10 time-divisionally displays the left eye image and the right eye image. The left eye image on the display panel 10 is converted into first circularly polarized light (or first linearly polarized light) by an active retarder, and the right eye image is converted to second circularly polarized light (or second linearly polarized light). The first circularly polarized light passes through the left eye filter of the stereoscopic glasses 20, and the second circularly polarized light passes through the right eye filter of the stereoscopic glasses 20. Therefore, the user can watch a stereoscopic image by binocular disparity.

The data driver 120 includes a plurality of source drive ICs. The source drive ICs convert 2D / 3D image data (RGB _2D / RGB _3D ') input from the timing controller 130 into positive / negative gamma compensation voltages to generate positive / negative analog data voltages. The positive / negative analog data voltages output from the source drive ICs are supplied to the data lines D of the display panel 10.

The gate driver 110 sequentially supplies gate pulses synchronized with the data voltage to the gate lines G of the display panel 10 under the control of the timing controller 130. The gate driver 110 may be composed of a plurality of gate drive integrated circuits each including a shift register, a level shifter for converting an output signal of the shift register into a swing width suitable for TFT driving of the liquid crystal cell, have. Alternatively, the gate driver 110 may be directly formed on the lower substrate of the display panel 10 by using a gate drive IC in panel (GIP) method. In the GIP method, the level shifter may be mounted on a printed circuit board (PCB), and the shift register may be formed on a lower substrate of the display panel 10.

The timing controller 130 gates the gate driver control signal based on the 2D / 3D image data (RGB _2D / RGB _3D ') and timing signals Vsync, Hsync, DE, and CLK output from the image quality improvement unit 140. The controller 110 outputs the data to the driver 110 and outputs a data driver control signal to the data driver 120. The gate driver control signal includes a gate start pulse (GSP), a gate shift clock (GSC), a gate output enable signal (Gate Output Enable, GOE), and the like. The gate start pulse GSP controls the timing of the first gate pulse. The gate shift clock GSC is a clock signal for shifting the gate start pulse GSP. The gate output enable signal GOE controls the output timing of the gate driver 110.

The data driver control signal includes a source start pulse (SSP), a source sampling clock (SSC), a source output enable signal (SOE), a polarity control signal (POL), and the like. . The source start pulse SSP controls the data sampling start time of the data driver 120. The source sampling clock is a clock signal that controls the sampling operation of the data driver 120 based on the rising or falling edge. If the digital video data to be input to the data driver 120 is transmitted using a mini LVDS (Low Voltage Differential Signaling) interface standard, the source start pulse SSP and the source sampling clock SSC may be omitted. The polarity control signal POL inverts the polarity of the data voltage output from the data driver 120 every L (L is a natural number) horizontal period period. The source output enable signal SOE controls the output timing of the data driver 120.

The host system 150 supplies 2D / 3D image data (RGB _2D / RGB _3D ) to the image quality improvement unit 140 through an interface such as a low voltage differential signaling (LVDS) interface and a transition minimized differential signaling (TMDS) interface. . In addition, the host system 150 supplies the timing signals Vsync, Hsync, DE, and CLK, the mode signal MODE, and the like to the image quality improvement unit 140.

The image quality improving unit 140 receives a mode signal MODE classified according to the 2D mode and the 3D mode. The image quality improving unit 140 may distinguish between the 2D mode and the 3D mode according to the mode signal MODE. The image quality improvement unit 140 outputs the 2D image data RGB _2D input from the host system 150 to the timing controller 130 as it is in the 2D mode. The image quality improvement unit 140 converts the 3D image data RGB _3D input from the host system 150 in the 3D mode according to the image quality improvement method, and then converts the 3D image data into 3D format. The timing signals Vsync, Hsync, DE, and CLK input from the host system 150 are converted according to the timing of 2D / 3D image data RGB _2D / RGB _3D ′ output from the image quality improving unit 140. The image quality improving unit 140 outputs 2D / 3D image data (RGB _2D / RGB _3D ') and timing signals Vsync, Hsync, DE, and CLK to the timing controller 130. A detailed description of the image quality improving unit 140 and the image quality improving method of the present invention will be described later with reference to FIGS. 3 and 4.

3 is a block diagram illustrating in detail the image quality improving unit of FIG. 2. 4 is a flowchart illustrating a method of improving an image quality of an image quality improving unit according to an exemplary embodiment of the present invention. Referring to FIG. 3, the image quality improving unit 140 includes a data sampling unit 141, a look-up table selecting unit 142, a data converter 143, a memory 144, and a 3D formatter 145. do. Hereinafter, the image quality improvement method of the image quality improvement unit 140 will be described in detail with reference to FIGS. 3 and 4.

First, the data sampling unit 141 receives a mode signal MODE and image data RGB _2D / RGB _3D from the host system 150. The data sampling unit 141 may determine whether the image data input through the mode signal MODE is 2D image data RGB _2D or 3D image data RGB _3D . When the 2D image data RGB _2D is input, the data sampling unit 141 outputs the 2D image data RGB _2D to the timing controller 130 without being converted. (S101, S102)

In the 3D image data RGB _3D input to the data sampling unit 141, the left eye image data RGB _L is arranged in the left half, and the right eye image data RGB _R is arranged in the right half, as shown in FIG. 5A. . The data sampling unit 141 separates the 3D image data RGB _3D into the left eye image data RGB _L and the right eye image data RGB _R , and expands the left eye image data RGB _L and the right eye as shown in FIG. 5B. The video data RGB _R is sampled. The data sampling unit 141 outputs the sampled left eye image data RGB _L and the right eye image data RGB _R to the data converter 143. (S103)

Second, the look-up table selector 142 determines which look-up table to select according to the coordinate value. The look-up table selecting unit 142 according to the first embodiment of the present invention calculates a reference coordinate value of the look-up table having a minimum distance with the coordinate value by comparing the coordinate value with the reference coordinate value of the look-up table. do. The look-up table selector 142 outputs a logic signal LS instructing to select a look-up table having a reference coordinate value of the minimum distance to the data converter 143.

Hereinafter, the look-up table selection method of the look-up table selecting unit 142 will be briefly described with reference to FIG. 6. The display panel 10 may be divided into first to kth regions (k is a natural number of two or more) according to its position. For example, the display panel 10 may be divided into first to ninth regions A [0] to A [8] as shown in FIG. 6. The first to ninth regions A [0] to A [8] may be formed to have the same size as shown in FIG. 6, but the present disclosure is not limited thereto. The memory 144 includes first to kth look-up tables LUT [0] to LUT [k-1] corresponding to the first to kth regions, respectively. Each of the first to k-th look-up tables LUT [0] to LUT [k-1] corresponds to a first to k-th look-up table LUT [0] to LUT [k-1]. 3D crosstalk compensation data calculated based on the 3D crosstalk measured in each of the 1 st to k th regions is stored.

When the left-eye or right-eye image data RGB _L / RGB _R of the coordinate value included in the first area A [0] is input, the look-up table selector 142 may input the coordinate value and the first look-up. Logic indicating the selection of the first look-up table LUT [0] because the reference coordinate values LUT [0] .X and LUT [0] .Y of the up table LUT [0] are closest. Output the signal LS.

Also, the look-up table selecting unit 142 according to the second embodiment of the present invention calculates reference coordinate values of the M look-up tables closest to the corresponding coordinate values, and selects M look-up tables therefrom. A logic signal LS indicating may be output. For example, when M is 2, the look-up table selector 142 may include left or right eye image data RGB _L / RGB _R of coordinate values included in the first area A [0] as shown in FIG. 6. ) Is input, the reference coordinate values LUT [0] .X, LUT [0] .Y, and the second look of the first look-up table LUT [0] located at the closest distance to the coordinate values. Reference coordinate values (LUT [1] .X, LUT [1] .Y) of the up-up table (LUT [1]) (or reference coordinate values (LUT [3) of the fourth look-up table (LUT [3]). ] .X, LUT [3] .Y)). In this case, the look-up table selecting unit 142 may include the first look-up table LUT [0] and the second look-up table LUT [1] (or the fourth look-up table LUT [ 3))) outputs a logic signal LS indicating the selection.

The look-up table selection method of the look-up table selecting unit 142 will be described later with reference to FIG. 8. (S104)

The data converter 143 receives the left eye image data RGB _L and the right eye image data RGB _R of the corresponding coordinate value from the data sampling unit 141. In addition, the data converter 143 receives the logic signal LS from the look-up table selector 142.

The data converter 143 according to the first exemplary embodiment of the present invention may include the first to k th look-up tables LUT [0] to LUT [k-1] stored in the memory 144 according to the logic signal LS. ), And using the selected look-up table, the left eye image data RGB _L and the right eye image data RGB _R of the corresponding coordinate values that caused the output of the logic signal LS are converted.

In addition, the data converter 143 according to the second exemplary embodiment of the present invention may include the first to kth look-up tables LUT [0] to LUT [k− stored in the memory 144 according to the logic signal LS. 1]) M is selected and the left eye image data RGB _L and the right eye image data RGB _R of the corresponding coordinate value are interpolated by interpolating the selected look-up tables. The data converter 143 outputs the converted left eye image data RGB _L ′ and right eye image data RGB _R ′ to the 3D formatter 145. (S105)

The 3D formatter 145 receives the converted left eye image data RGB _L ′ and right eye image data RGB _R ′ from the data converter 143. As illustrated in FIG. 7A, the 3D formatter 145 time-divisions the left eye image data RGB _L ′ and the right eye image data RGB _R ′ in the shutter glasses type or the active retarder type. That is, the 3D formatter 145 arranges only the left eye image data RGB _L ′ in the odd frame and outputs the 3D image data RGB _3D ′ in which only the right eye image data RGB _R ′ is arranged in the even frame. In addition, the 3D formatter 145 may generate a frame for outputting black data between the left eye image data RGB _L 'and the right eye image data RGB _R ' according to the Black Data Insertion technology at a high speed of 240 Hz or higher. The inserted 3D image data RGB _3D 'may be output. It should be noted that the 3D format method of the 3D formatter 145 illustrated in FIG. 7A is only an example of the 3D format method in the case of the shutter glasses method or the active retarder method.

In the case of the pattern retarder method, the 3D formatter 145 arranges the left eye image data RGB _L ′ on the odd lines and the right eye image data RGB _R ′ on the even lines, as shown in FIG. 7B. Output (RGB _3D '). The 3D format method of the 3D formatter 145 may vary according to the arrangement of the first and second retarders of the pattern retarder 30. It should be noted that the 3D format method shown in FIG. 7B is only an example of the 3D format method in the case of the pattern retarder method, and is not limited thereto. (S106)

8 is a flowchart illustrating an example of a look-up table selection method of the look-up table selecting unit of FIG. 3. Hereinafter, the look-up table selection method of the look-up table selecting unit 142 according to the first embodiment of the present invention will be described in detail with reference to FIGS. 6 and 8.

First, the look-up table selector 142 receives coordinate values (X, Y) as parameters. The data converter 143 receives the left eye image data RGB _L and the right eye image data RGB _R from the data sampling unit 141. Also, the data converter 143 receives a logic signal LS instructing to select the look-up table from the look-up table selector 142. (S201)

Second, the look-up table selector 142 sets the coordinate values (X, Y) to i (i is a natural number satisfying 1≤i≤k). .X, LUT [i] .Y), the coordinate values (X, Y) are any of the reference coordinate values (LUT [i] .X, LUT [i] .Y) of the i-th look-up table. It is determined whether it is closest to the reference coordinate value of the up table. To this end, the look-up table selector 142 first calculates the coordinate values (X, Y) and the reference coordinate values (LUT [0] .X) of the first look-up table (LUT [0]) as shown in Equation 1. After calculating the distance of LUT [0] .Y), store the value in the minimum distance value (MinDist). The look-up table selector 142 stores the minimum index value MinIndex as '0' to indicate the first look-up table LUT [0] to be compared with the coordinate values X and Y. In addition, an i value indicating the i th look-up table LUT [i] to be compared with the coordinate values X and Y in the future is stored as 1. (S202)

Third, it is determined whether i is smaller than the number of look-up tables. If i is smaller than the number of look-up tables, the look-up table selector 142 may use coordinate values (X, Y) and reference coordinate values of the i-th look-up table (LUT [i]) as shown in Equation (2). The distance of (LUT [i] .X, LUT [i] .Y) is obtained, and the value is stored in the distance value Dist. (S203, S204)

The look-up table selector 142 compares the distance value Dist and the minimum distance value MinDist, and when the minimum distance value MinDist is greater than the distance value Dist, converts the minimum distance value MinDist to a distance value. Replace with (Dist) and replace the minimum index value (MinIndex) with i. The look-up table selector 142 does not replace the minimum distance value MinDist and the minimum index value MinIndex when the minimum distance value MinDist is less than or equal to the distance value Dist. The look-up table selector 142 replaces i with i + 1. (S205, S206, S207)

The look-up table selector 142 outputs the minimum index value MinIndex as the logic signal LS to the data converter 143 when i is greater than the number of look-up tables. The data converter 143 selects any one of the first to kth look-up tables LUT [0] to LUT [k] stored in the memory 144 according to the minimum index value MinIndex. The data converter 143 converts the left eye image data of the corresponding coordinate value and the right eye image data of the corresponding coordinate value by using the selected look-up table, the left eye image data of the corresponding coordinate value, and the right eye image data of the corresponding coordinate value. (S208)

As described above, the present invention samples the input 3D image data into left eye image data and right eye image data, and selects a look-up table according to coordinate values to compensate for 3D crosstalk. As a result, the present invention can compensate for 3D crosstalk by using a look-up table optimized for each area of the display panel, thereby improving 3D crosstalk in all areas of the display panel.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: display panel 20: three-dimensional glasses
110: gate driver 120: data driver
130: timing controller 140: image quality improvement unit
141: data sampling unit 142: look-up table selection unit
143: data converter 144: memory
145: 3D formatter 150: host system

Claims (10)

A display panel including a plurality of pixels intersecting the data lines and the gate lines and formed in a cell region defined by an intersection of the data lines and the gate lines;
3D image data input in 3D mode is sampled into left eye image data and right eye image data, and a look-up table is selected according to coordinate values to convert the left eye image data and right eye image data, and the converted left eye image data and right eye An image quality improving unit for converting image data into a 3D format;
A data driver converting the 3D image data converted by the image quality improving unit into a data voltage and outputting the data voltage to the data lines; And
And a gate driver configured to sequentially output gate pulses synchronized with the data voltages to the gate lines. The method of claim 1,
The display panel is divided into first to nth regions,
The image quality improvement unit,
And a memory including first to nth look-up tables corresponding to each of the first to nth regions. The method of claim 2,
Each of the first to nth look-up tables includes:
And 3D crosstalk compensation data calculated based on 3D crosstalk measured in each of the first to nth regions corresponding to the first to nth look-up tables. The method of claim 2,
The image quality improvement unit,
A data sampling unit that separates and expands the 3D image data into the left eye image data and the right eye image data;
Comparing a coordinate value with reference coordinate values of the first to nth look-up tables to calculate a reference coordinate value of the look-up table having the minimum distance with the coordinate value, and the look having the reference coordinate value of the minimum distance. A look-up table selection unit for outputting a logic signal instructing to select a -up table;
A data converter configured to select any one of the first to nth look-up tables stored in the memory according to the logic signal, and to convert left eye image data and right eye image data of the coordinate values using the selected look-up table. ; And
And a 3D formatter for converting the converted left eye image data and right eye image data into a 3D format. The method of claim 2,
The image quality improvement unit,
A data sampling unit that separates and expands the 3D image data into the left eye image data and the right eye image data;
Comparing coordinate values with reference coordinate values of the first to nth look-up tables to calculate reference coordinate values of M look-up tables having a minimum distance from the coordinate values, where M is a natural number of two or more. A look-up table selection unit for outputting a logic signal instructing to select M look-up tables having a reference coordinate value of the minimum distance;
M look-up tables are selected from the first to n-th look-up tables stored in the memory according to the logic signal, and the left-eye image data and the right-eye image data of the coordinate values are interpolated by the selected M look-up tables. A data converter for converting the data; And
And a 3D formatter for converting the converted left eye image data and right eye image data into a 3D format. The method of claim 2,
The data sampling unit,
3D image display device for outputting the 2D image data as it is when 2D image data is input. A stereoscopic image display device including a display panel intersecting data lines and gate lines and including a plurality of pixels formed in a cell region defined by an intersection of the data lines and gate lines.
3D image data input in 3D mode is sampled into left eye image data and right eye image data, and a look-up table is selected according to coordinate values to convert the left eye image data and right eye image data, and the converted left eye image data and right eye Converting the image data into a 3D format;
Converting the converted 3D image data into a data voltage to output the data lines; And
And sequentially outputting gate pulses synchronized with the data voltage to the gate lines. The method of claim 7, wherein
3D image data input in the 3D mode is sampled into left eye image data and right eye image data, and a look-up table is selected according to coordinate values to convert the left eye image data and right eye image data, and the converted left eye image data Converting the right eye image data to the 3D format,
Dividing and expanding the 3D image data into the left eye image data and the right eye image data;
The coordinate values are compared with the reference coordinate values of the first to nth look-up tables to calculate the reference coordinate values of the look-up table having the minimum distance with the coordinate values, and the look-up having the reference coordinate values of the minimum distance. Outputting a logic signal instructing to select an up table;
Selecting one of the first to nth look-up tables according to the logic signal, and converting left eye image data and right eye image data of the coordinate values using the selected look-up table; And
And converting the converted left eye image data and right eye image data into a 3D format. The method of claim 7, wherein
3D image data input in the 3D mode is sampled into left eye image data and right eye image data, and a look-up table is selected according to coordinate values to convert the left eye image data and right eye image data, and the converted left eye image data Converting the right eye image data to the 3D format,
Dividing and expanding the 3D image data into the left eye image data and the right eye image data;
Comparing coordinate values with reference coordinate values of the first to nth look-up tables to calculate reference coordinate values of M look-up tables having a minimum distance from the coordinate values, where M is a natural number of two or more. Outputting a logic signal instructing to select M look-up tables having a reference coordinate value of the distance;
Selecting M look-up tables from the first to n-th look-up tables according to the logic signal, and converting the left eye image data and the right eye image data of the coordinate values by interpolating the selected M look-up tables. step; And
And converting the converted left eye image data and right eye image data into a 3D format. The method of claim 7, wherein
Separating and extending the 3D image data into the left eye image data and the right eye image data,
And when the 2D image data is input, outputting the 2D image data as it is.

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