KR20120015006A - Stereoscopic image display device and driving method the same - Google Patents

Stereoscopic image display device and driving method the same Download PDF

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Publication number
KR20120015006A
KR20120015006A KR1020100077181A KR20100077181A KR20120015006A KR 20120015006 A KR20120015006 A KR 20120015006A KR 1020100077181 A KR1020100077181 A KR 1020100077181A KR 20100077181 A KR20100077181 A KR 20100077181A KR 20120015006 A KR20120015006 A KR 20120015006A
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South Korea
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stereoscopic image
luminance
lum
converted
image
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KR1020100077181A
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Korean (ko)
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임경호
홍형기
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엘지디스플레이 주식회사
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Publication of KR20120015006A publication Critical patent/KR20120015006A/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display

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  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

An embodiment of the present invention, a stereoscopic image display panel; Polarized glasses for viewing the image displayed through the stereoscopic image display panel; And a timing controller configured to supply an image to the stereoscopic image display panel, wherein the timing controller includes a luminance difference between the original stereoscopic image supplied to the stereoscopic image display panel and the measured stereoscopic image by measuring crosstalk for each gray level of the stereoscopic image display panel. Image correction to set the luminance to be converted, determine whether to perform low gray level optimization on the stereoscopic image reflecting the luminance to be converted, and correct the stereoscopic image reflecting the luminance to be converted according to the determination result of whether to perform the low gray level optimization. Provided is a stereoscopic image display device including a portion.

Description

Stereoscopic Image Display Device and Driving Method {Stereoscopic Image Display Device and Driving Method the same}

An embodiment of the present invention relates to a stereoscopic image display device and a driving method thereof.

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 left and right eyes having a large stereoscopic effect. There are two types of binocular parallax: glasses and no glasses. The spectacle method displays a time-division method by changing the polarization direction of left and right parallax images on a direct view type liquid crystal panel or a projector, and realizes a stereoscopic image using polarized glasses or liquid crystal shutter glasses. The autostereoscopic method is generally provided with an optical plate such as a parallax barrier for separating the optical axis of the left and right parallax images in front of or behind the liquid crystal panel.

Recently, due to the commercialization of the stereoscopic image display device and the development of various technologies, a case of applying a patterned retarder, which is an optical film that changes the light modulation characteristics for each pattern, has been increasing. In the glasses type stereoscopic image display apparatus using a patterned retarder, the left eye image displayed on the liquid crystal panel passes only the left eye retarder and the right eye image passes only the right eye retarder so that crosstalk does not occur in the stereoscopic image. However, in the conventional glasses type stereoscopic image display apparatus using a patterned retarder, the left eye image can pass not only the left eye retarder but also the right eye retarder, and the right eye image can pass the left eye retarder like the left eye image. Measures should be taken to improve the crosstalk caused by the problem.

Embodiments of the present invention provide a stereoscopic image display apparatus and a driving method thereof capable of reducing crosstalk generated at a viewing angle.

Embodiments of the present invention as a means for solving the above problems, three-dimensional image display panel; Polarized glasses for viewing the image displayed through the stereoscopic image display panel; And a timing controller configured to supply an image to the stereoscopic image display panel, wherein the timing controller includes a luminance difference between the original stereoscopic image supplied to the stereoscopic image display panel and the measured stereoscopic image by measuring crosstalk for each gray level of the stereoscopic image display panel. Image correction to set the luminance to be converted, determine whether to perform low gray level optimization on the stereoscopic image reflecting the luminance to be converted, and correct the stereoscopic image reflecting the luminance to be converted according to the determination result of whether to perform the low gray level optimization. Provided is a stereoscopic image display device including a portion.

The image correction unit outputs the original stereoscopic image when low gray level optimization is not required for the stereoscopic image reflecting the luminance to be converted. Gradation can be converted.

The image correction unit sets the luminance to be converted using the following Modified Lum (LI) equation, and modifies Lum (LI) = Lum (LI)-| Lum (LI)-Lum (RI) | 3DCT (LI, RI). ), Where Lum (LI) is the luminance of the left eye image in the original stereoscopic image, Lum (RI) is the luminance of the right eye image in the original stereoscopic image, and 3DCT (LI, RI) occurs in the left and right eyes of the original stereoscopic image It may be a crosstalk for each gray level.

When determining whether to perform the low gray level optimization, the image correction unit processes a section in which the Modified Lum (LI) expression is <0, and if the Modified Lum (LI) equation is less than 0, low gray level optimization for the stereoscopic image is not required. If the Modified Lum (LI) equation is greater than 0, it may be determined that low gray level optimization for stereoscopic images is required.

 The image corrector may correct a depth area of the stereoscopic image in which the luminance to be converted is reflected.

In another aspect, an embodiment of the present invention, the step of measuring the cross-talk for each gray level of the stereoscopic image display panel using a measuring device and deriving the measured stereoscopic image; Setting a luminance to be converted through a luminance difference between the original stereoscopic image supplied to the stereoscopic image display panel and the measured stereoscopic image; Determining whether to perform low gray level optimization on the stereoscopic image reflecting the luminance to be converted; And correcting the stereoscopic image in which the luminance to be converted is reflected according to the determination result of whether the low gradation optimization is performed.

The correcting of the stereoscopic image may include outputting an original stereoscopic image when low gray level optimization for the stereoscopic image reflecting the brightness to be converted is required, and outputting the original stereoscopic image when low gray level optimization for the stereoscopic image reflecting the brightness to be converted is required. Gradation can be converted to the luminance to be converted.

The step of setting the luminance to be converted is set by the following Modified Lum (LI) equation, where Modified Lum (LI) = Lum (LI)-| Lum (LI) -Lum (RI) | × 3DCT (LI, RI) Where Lum (LI) is the luminance of the left eye image in the original stereoscopic image, Lum (RI) is the luminance of the right eye image in the original stereoscopic image, and 3DCT (LI, RI) is generated in the left and right eyes of the original stereoscopic image. It may be crosstalk for each gray level.

In the step of determining whether to perform the low gradation optimization, the section where the Modified Lum (LI) expression is <0 is processed as 0, and when the Modified Lum (LI) expression is less than 0, it is determined that the low gradation optimization for the stereoscopic image is not required. If the Modified Lum (LI) equation is greater than 0, it may be determined that low gray level optimization for stereoscopic images is required.

In the correcting the stereoscopic image, the depth area of the stereoscopic image reflecting the luminance to be converted may be corrected.

An embodiment of the present invention sets the luminance to be converted through the luminance difference between the original stereoscopic image and the measured stereoscopic image, and reduces crosstalk generated at the viewing angle by performing low gray level optimization according to the characteristics of the stereoscopic image. It is effective to provide a stereoscopic image display device and a driving method thereof.

1 is a schematic configuration diagram of a stereoscopic image display device according to an embodiment of the present invention.
2 is a circuit configuration diagram of a subpixel.
3 is a schematic block diagram of a timing controller according to an embodiment of the present invention;
4 is a flowchart for explaining a stereoscopic image correction method.
5 is a diagram for explaining stereoscopic image correction.
6 is a graph illustrating a simulation of a crosstalk prediction profile by a stereoscopic image display device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the specific content for the practice of the present invention will be described.

1 is a schematic configuration diagram of a stereoscopic image display device according to an exemplary embodiment of the present invention, and FIG. 2 is a circuit configuration diagram of a subpixel.

1 and 2, a stereoscopic image display apparatus according to an embodiment of the present invention includes a system board unit SBD, a timing controller TCN, a driver DRV, and a stereoscopic image stereoscopic display panel PNL. ) And polarizing glasses (GLS).

The system board unit SBD generates 2D image frame data in a two-dimensional mode (2D mode), and generates 3D image frame data (hereinafter, referred to as a stereoscopic image) in a three-dimensional mode (3D mode). The system board unit SBD transmits timing signals such as a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a data enable signal DE, and a main clock, and image frame data to the timing controller TCN. Supply. The system board unit SBD is selected in a 2D or 3D mode according to a user selection input through a user interface, generates image frame data corresponding thereto, and supplies the same to the timing controller TCN. The user interface includes user input means such as an on screen display (OSD), a remote controller, a keyboard, and a mouse. Hereinafter, as an example, the system board unit SBD is selected as the 3D mode and the 3D image frame data is supplied to the timing controller TCN.

The timing controller TCN receives a stereoscopic image including left eye image frame data and right eye image frame data from the system board unit SBD. The timing controller TCN alternately supplies the left eye image frame data and the right eye image frame data included in the stereoscopic image to the driver DRV at a frame frequency of 120 Hz or more. The timing controller TCN includes an image corrector CMP for correcting a stereoscopic image. The timing controller TCN supplies a control signal corresponding to the image frame data to the driver DRV.

The driver DRV includes a data driver connected to the data lines to supply a data signal, and a gate driver connected to the gate lines to supply a gate signal. The driver DRV converts the left and right eye image frame data in the digital form into the left and right eye image frame data in the positive / negative analog form and supplies them to the data lines under the control of the timing controller TCN. The driver DRV sequentially supplies gate signals to the gate lines under the control of the timing controller TCN.

The stereoscopic image display panel PNL receives a gate signal and a data signal from the driver DRV and displays a two-dimensional image or a three-dimensional image correspondingly. The stereoscopic image display panel PNL includes a backlight unit BLU, a liquid crystal panel LCD, and a patterned retarder PRF. The liquid crystal panel LCD includes a thin film transistor substrate (hereinafter referred to as a "TFT substrate") on which a thin film transistor and a capacitor are formed, and a color filter substrate on which a color filter and a black matrix are formed. The TFT substrate and the color filter substrate are maintained at a constant interval by a column spacer (CS) and include an alignment layer and a liquid crystal layer therein. In the liquid crystal panel LCD, a sub pixel SP including a liquid crystal layer formed between the TFT substrate and the color filter substrate is formed in a matrix form. The subpixel SP includes a red subpixel, a green subpixel, and a blue subpixel. A general circuit configuration of one subpixel includes a thin film transistor TFT, a storage capacitor Cst, and a liquid crystal layer Clc as shown in FIG. 2. In the thin film transistor TFT, a source electrode is connected to a data line DL to which a data signal is supplied, and a gate electrode is connected to a gate line GL to which a gate signal is supplied. The storage capacitor Cst and the liquid crystal layer Clc are connected to the drain electrode of the thin film transistor TFT, and they receive a common voltage supplied through the common voltage line Vcom. With this configuration, the liquid crystal layer Clc is driven by the difference between the data voltage supplied to the pixel electrode 1 and the common voltage supplied to the common electrode 2. The common electrode is formed on the color filter substrate in a vertical electric field driving method such as twisted nematic (TN) mode and vertical alignment (VA) mode, and is horizontal in the same manner as IPS (In Plane Switching) mode and FFS (Fringe Field Switching) mode. In the electric field driving method, the pixel electrode 1 is formed on the TFT substrate. The liquid crystal mode of the liquid crystal panel (LCD) can be implemented in any liquid crystal mode as well as the TN mode, VA mode, IPS mode, FFS mode. The lower polarizing plate POL1 and the upper polarizing plate POL2 are attached to the TFT substrate and the color filter substrate of the liquid crystal panel LCD, respectively. The liquid crystal panel LCD configured as described above can display an image by the light provided from the backlight unit BLU and alternate the left and right eye images according to the polarization change of the patterned retarder PRF attached to the display surface. It becomes possible to display. The patterned retarder PRF may be formed to alternately generate the right circularly polarized light R and the left circularly polarized light L for each line of the subpixels SP, but is not limited thereto. Meanwhile, the backlight unit BLU is driven under the control of the system board part SBD or the timing controller TCN to provide light to the liquid crystal panel LCD. The backlight unit BLU includes a light source for emitting light, a light guide plate for guiding light emitted from the light source toward the liquid crystal panel (LCD), an optical member for diffusing and condensing the light emitted from the light guide plate, and the like. The backlight unit (BLU) is composed of edge type, dual type, quad type and direct type. In the edge type, the light source is disposed on one side of the liquid crystal panel (LCD), and the dual type is the type in which the light source is disposed opposite to both sides of the liquid crystal panel (LCD). In the quad type, the light source is disposed on all sides of the liquid crystal panel (LCD). The direct type is a form in which a light source is disposed below the liquid crystal panel (LCD).

The polarized glasses GLS divides the image displayed on the stereoscopic image display panel PNL into a left eye image and a right eye image. Since the left eyeglasses LEFT of the polarizing glasses GLS transmit only the odd-numbered subpixels displayed through the patterned retarder PRF, the user sees only the left eye image. On the contrary, the right eyeglass RIGHT of the polarizing glasses GLS transmits only the even-numbered subpixels displayed through the patterned retarder PRF, so that the user sees only the right eye image.

According to the above structure, the left eye image and the right eye image are alternately displayed for each frame on the stereoscopic image display panel (PNL), and the user can enjoy the 3D stereoscopic image through polarized glasses (GLS).

The timing controller will be described in more detail below.

3 is a schematic block diagram of a timing controller according to an embodiment of the present invention, FIG. 4 is a flowchart illustrating a stereoscopic image correction method, FIG. 5 is a diagram for explaining a stereoscopic image correction, and FIG. 6. Is a graph illustrating a simulation of a crosstalk prediction profile by a stereoscopic image display device according to an embodiment of the present invention.

1 and 3, the timing controller TCN according to an embodiment of the present invention may include a memory unit 110, a luminance setting unit 120, an image processor 130, and a low gray scale optimization determination unit ( 140, a depth region grayscale converter 150, and an image outputter 160. Here, the memory unit 110, the luminance setting unit 120, the low gradation optimization determination unit 140, the depth area gradation conversion unit 150, and the image output unit 160 are supplied to the timing controller TCN. It is included in the image correction unit (CMP) for correcting the stereoscopic image based on the image and the measured stereoscopic image. The image correction unit (CMP) sets the luminance to be converted through the luminance difference between the original stereoscopic image supplied to the stereoscopic image display panel (PNL) and the measured stereoscopic image measuring crosstalk for each gray level of the stereoscopic image display panel (PNL). The method determines whether low grayscale optimization is performed on the stereoscopic image reflecting the luminance to be converted, and corrects the stereoscopic image reflecting the luminance to be converted according to the determination result of the low grayscale optimization. The CMP outputs an original stereoscopic image if low-gradation optimization is not required for the stereoscopic image reflecting the luminance to be converted, and converts the original stereoscopic image if low-gradation optimization is required for the stereoscopic image reflecting the luminance to be converted. The image can be output as a corrected stereoscopic image by converting the gray level into luminance.

The memory unit 110 stores the measured stereoscopic image of the crosstalk for each gray level. The measured stereoscopic image stored in the memory unit 110 is transmitted to the luminance setting unit 120.

The luminance setting unit 120 sets the luminance to be converted through the luminance difference between the original stereoscopic image supplied to the stereoscopic image display panel PNL and the measured stereoscopic image measuring crosstalk for each gray level of the stereoscopic image display panel PNL. do. The luminance setting unit 120 sets the luminance to be converted using Modified Lum (LI), which is represented by Equation 1 below.

( Equation  One)

Modified Lum (LI) = Lum (LI)-| Lum (LI)-Lum (RI) ｜ × 3DCT (LI, RI)

Here, Lum (LI) is the luminance of the left eye image in the original stereoscopic image, Lum (RI) is the luminance of the right eye image in the original stereoscopic image, and 3DCT (LI, RI) is a system occurring in the left and right eyes of the original stereoscopic image. Defined as a group crosstalk.

The image processor 130, in conjunction with the luminance setting unit 120, reflects the luminance to be converted into the stereoscopic image OIMG supplied from the system board unit SBD. The stereoscopic image reflecting the luminance to be converted by the image processor 130 is transmitted to the low gray scale optimization determiner 140.

The low gradation optimization determination unit 140 determines whether to perform low gradation optimization on the stereoscopic image reflecting the luminance to be converted. When the low gradation optimization determination unit 140 determines whether to perform the low gradation optimization, the section in which the Modified Lum (LI) equation of Equation 1 is <0 is treated as 0. If the Modified Lum (LI) equation is less than 0, it is determined that low gray level optimization for stereoscopic images is not required. If the Modified Lum (LI) equation is greater than 0, it is determined that low gray level optimization for stereoscopic images is required. The low gradation optimization determination unit 140 transmits the original stereoscopic image OIMG to the image output unit 160 when low gradation optimization for the stereoscopic image reflecting the luminance to be converted is not required. On the other hand, if the low gray level optimization for the stereoscopic image reflecting the luminance to be converted is required, the low gray scale optimization determination unit 140 transmits the stereoscopic image reflecting the luminance to be converted to the depth area gray scale converting unit 150.

The depth region grayscale converter 150 converts the original stereoscopic image when the low grayscale optimization is required for the stereoscopic image reflecting the luminance to be converted according to the determination result of the low gray scale optimization determiner 140. In this case, the depth region grayscale converter 150 generates a corrected stereoscopic image CIMG by correcting a depth region of the stereoscopic image in which the luminance to be converted is reflected.

The image output unit 160 outputs the corrected stereoscopic image CIMG supplied from the depth area gray scale converter 150 or the original stereoscopic image OIMG supplied from the low gray scale optimization determination unit 140.

Hereinafter, a driving method of a stereoscopic image display device according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1, 3, and 4.

First, the crosstalk for each gray level of the stereoscopic image display panel PNL is measured by using a measuring apparatus, and a measured stereoscopic image is derived. (S110) Information about the measured stereoscopic image is stored in the memory unit 110.

Next, the luminance to be converted is set by the luminance difference between the original stereoscopic image and the measured stereoscopic image supplied to the stereoscopic image display panel PNL. (S120) The luminance difference between the original stereoscopic image OIMG and the measured stereoscopic image is determined. It is set by the brightness setting unit 120. Here, the brightness setting unit 120 sets the brightness to be converted using the Modified Lum (LI) equation, which is described above.

Next, the luminance to be converted is reflected in the original stereoscopic image OIMG. (S130) The luminance setting unit 120 and the image processing unit 130 reflect the luminance to be converted in the original stereoscopic image OIMG.

Next, it is determined whether the low gray level optimization is performed on the stereoscopic image reflecting the luminance to be converted (S140). The low gray level optimization determining unit 140 determines whether to perform the low gray level optimization. The low gradation optimization determination unit 140 determines whether to perform low gradation optimization on the stereoscopic image reflecting the luminance to be converted. When the low gradation optimization determination unit 140 determines whether to perform the low gradation optimization, the section in which the Modified Lum (LI) equation of Equation 1 is <0 is treated as 0. If the Modified Lum (LI) equation is less than 0, it is determined that low gray level optimization for stereoscopic images is not required. If the Modified Lum (LI) equation is greater than 0, it is determined that low gray level optimization for stereoscopic images is required. The low gradation optimization determination unit 140 includes an image output unit 160 belonging to a stereoscopic image output step so that an original stereoscopic image (OIMG) is output without correction if low gradation optimization for a stereoscopic image reflecting the luminance to be converted is not required (No). To pass). On the contrary, when the low gray level optimization for the stereoscopic image reflecting the brightness to be converted is required (Yes), the low gray level optimization determining unit 140 performs the depth area gray level converting unit 150 in the stereoscopic image correction step on the stereoscopic image reflecting the brightness to be converted. To pass).

Next, the stereoscopic image in which the luminance to be converted is reflected is corrected according to the determination result of whether the low grayscale optimization is performed. (S150) The stereoscopic image correction is performed by the depth region grayscale converter 150. The depth region grayscale converter 150 converts the original stereoscopic image when the low grayscale optimization is required for the stereoscopic image reflecting the luminance to be converted (Yses) according to the determination result of the low gray scale optimization determination unit 140. In this case, the depth region grayscale converter 150 generates a corrected stereoscopic image CIMG by correcting a depth region of the stereoscopic image in which the luminance to be converted is reflected.

5 and 6, a left eye image and a right eye image are illustrated as original images. The left eye image and the right eye image included in the illustrated original image are image converted by the correction method according to the embodiment. In the case of the left eye image and the right eye image which are changed by the correction method, the allowable value of the depth area d is corrected to have a reduced profile than the measured value. In the case of the observed image after being changed by the correction method, it is not easy to distinguish the left eye image and the right eye image observed when the crosstalk is not zero.

However, referring to the graph of FIG. 6, the measured value before the image signal correction derived through the measurement indicates an angular range where crosstalk (3DCT)> 2%. However, when the left and right images are converted such that the allowable value is set to 2% and the crosstalk of about 1.5% is compensated by the correction method according to the embodiment, the side crosstalk (3DCT) is reduced and the front crosstalk (3DCT) is reduced. Was increased but kept below the allowable value. Therefore, if the depth region of the stereoscopic image is corrected according to the correction method of the embodiment, it is possible to improve from ± 50 degrees before correction to ± 70 degrees after correction in an area of 2% or less due to the change of the crosstalk expected profile after image signal correction. do.

According to the above description, an embodiment of the present invention measures crosstalk generated when a left eye image passes through a right eye retarder and a right eye image passes through a left eye retarder through a patterned retarder, and determines a stereoscopic image according to an expected profile of crosstalk. By correcting the image, crosstalk generated at the viewing angle can be reduced.

Embodiment of the present invention is to set the luminance to be converted by the difference in luminance between the original stereoscopic image and the measured stereoscopic image, and to reduce the crosstalk generated in the viewing angle by the image correction to perform the low gradation optimization according to the characteristics of the stereoscopic image It is effective to provide a stereoscopic image display device and a driving method thereof.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical configuration of the present invention described above may be modified in other specific forms by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features. It will be appreciated that it may be practiced. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. In addition, the scope of the present invention is shown by the claims below, rather than the above detailed description. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.

SBD: System Board TCN: Timing Control
DRV: Driver PNL: Stereoscopic Stereoscopic Display Panel
GLS: Polarized Glasses LCD: Liquid Crystal Panel
PRF: Patterned Retarder CMP: Image Corrector
110: memory unit 120: luminance setting unit
130: image processing unit 140: low gradation optimization determination unit
150: depth region gray level converter 160: image output unit

Claims (10)

Stereoscopic image display panel;
Polarized glasses for viewing the image displayed through the three-dimensional image display panel; And
A timing controller configured to supply an image to the stereoscopic image display panel,
The timing controller,
The luminance to be converted is set through the difference in luminance between the original stereoscopic image supplied to the stereoscopic image display panel and the measured stereoscopic image measured by the gray level crosstalk of the stereoscopic image display panel. And an image correction unit configured to determine whether to perform the low gray level optimization and to correct the stereoscopic image reflecting the luminance to be converted according to the determination result of the low gray level optimization. The method of claim 1,
The image correction unit,
If the low gray level optimization for the stereoscopic image reflecting the brightness to be converted is not required, the original stereoscopic image is outputted, and if the low gray level optimization for the stereoscopic image reflecting the brightness to be converted is required, the luminance for converting the original stereoscopic image is required. And converting the grayscale into a corrected stereoscopic image and outputting the corrected stereoscopic image. The method of claim 1,
The image correction unit,
Modified Lum (LI) = Lum (LI)-| Lum (LI)-Lum (RI) ｜ × 3DCT (LI, RI)
Set the luminance to be converted using the Modified Lum (LI) equation,
The Lum (LI) is the luminance of the left eye image in the original stereoscopic image, the Lum (RI) is the luminance of the right eye image in the original stereoscopic image, and the 3DCT (LI, RI) is the left and right eyes of the original stereoscopic image And a crosstalk for each of the gray levels. The method of claim 3,
The image correction unit,
When determining whether to perform the low gradation optimization,
The section where the Modified Lum (LI) expression is <0 is treated as 0,
If the Modified Lum (LI) is less than 0, it is determined that low gray level optimization for the stereoscopic image is not required.
If the Modified Lum (LI) equation is greater than 0, it is determined that the low gray level optimization for the stereoscopic image is required. The method of claim 1,
The image correction unit,
And a depth area of the stereoscopic image in which the luminance to be converted is reflected. Measuring crosstalk for each gray level of the stereoscopic image display panel using a measuring device and deriving the measured stereoscopic image;
Setting a luminance to be converted through a luminance difference between the original stereoscopic image supplied to the stereoscopic image display panel and the measured stereoscopic image;
Determining whether to perform low gray level optimization on the stereoscopic image in which the luminance to be converted is reflected; And
And correcting the stereoscopic image in which the luminance to be converted is reflected according to a determination result of whether the low gray scale optimization is performed. The method of claim 6,
Correcting the stereoscopic image,
If the low gray level optimization for the stereoscopic image reflecting the brightness to be converted is not required, the original stereoscopic image is outputted, and if the low gray level optimization for the stereoscopic image reflecting the brightness to be converted is required, the luminance for converting the original stereoscopic image is required. And a gray level conversion method. The method of claim 6,
Setting the brightness to be converted,
Modified Lum (LI) = Lum (LI)-| Lum (LI)-Lum (RI) ｜ × 3DCT (LI, RI)
It is set by the Modified Lum (LI) equation,
The Lum (LI) is the luminance of the left eye image in the original stereoscopic image, the Lum (RI) is the luminance of the right eye image in the original stereoscopic image, and the 3DCT (LI, RI) is the left and right eyes of the original stereoscopic image And a cross talk for each of the gray levels. The method of claim 8,
The determining of whether to perform the low gradation optimization,
The section where the Modified Lum (LI) expression is <0 is treated as 0,
If the Modified Lum (LI) is less than 0, it is determined that low gray level optimization for the stereoscopic image is not required.
If the Modified Lum (LI) equation is greater than 0, it is determined that the low gray level optimization for the stereoscopic image is required. The method of claim 1,
Correcting the stereoscopic image,
And a depth area of the stereoscopic image in which the luminance to be converted is reflected.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9230488B2 (en) 2012-06-29 2016-01-05 Samsung Display Co., Ltd. Method of driving display device
KR101836180B1 (en) * 2012-04-24 2018-03-08 엘지디스플레이 주식회사 System for evaluating optical characteristic of stereoscopic image display device and method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101836180B1 (en) * 2012-04-24 2018-03-08 엘지디스플레이 주식회사 System for evaluating optical characteristic of stereoscopic image display device and method thereof
US9230488B2 (en) 2012-06-29 2016-01-05 Samsung Display Co., Ltd. Method of driving display device
US10009604B2 (en) 2012-06-29 2018-06-26 Samsung Display Co., Ltd. Method of driving display device

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