KR101930373B1 - Stereoscopic image display device and driving method thereof - Google Patents

Abstract

The present invention relates to a stereoscopic image display apparatus and a method of driving the stereoscopic image display apparatus that can optimize the image quality of a stereoscopic image according to a viewing distance of a viewer and a stereoscopic image display apparatus, A video display module to be displayed; A position detection module for detecting position information of a viewer viewing the stereoscopic image; And a controller for calculating the viewing distance value based on the position information of the viewer detected by the position detection module and controlling the brightness of the stereoscopic image by controlling the video display module according to the calculated viewing distance value, .

Description

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

The present invention relates to a stereoscopic image display apparatus, and more particularly, to a stereoscopic image display apparatus and a driving method thereof that can optimize the image quality of a stereoscopic image according to a viewing distance of a viewer.

In general, a stereoscopic (or 3D) image display device is a device that enables a viewer to view a stereoscopic image by binocular parallax of the left and right eyes by providing different images to the left and right eyes of a viewer.

In recent years, studies have been actively conducted on the non-eyeglass system in which stereoscopic glasses are not worn. In the non-eyeglass system, there is a lenticular system for separating the left eye and right eye images using a cylindrical lens array, and a barrier system for separating the left eye and the right eye image using a barrier.

1 is a schematic view for explaining a general barrier type stereoscopic image display apparatus.

1, a conventional barrier type stereoscopic image display apparatus includes a display panel 10 for displaying a left eye image LI and a right eye image RI in a separated manner, and a display panel 10 disposed on the front surface of the display panel 10, And a barrier panel (20) for alternately forming the region (22) and the light shielding region (24).

The viewer views the image displayed on the display panel 10 through the light transmitting region 22 of the barrier panel 20. The left eye LE and the right eye RE of the viewer have the same light transmitting region 22 The user can see another area of the display panel 10 through the display panel 10. Accordingly, the viewer can see the left-eye image LI and the right-eye image RI displayed adjacently through the light-transmitting region 22, thereby feeling a three-dimensional image.

In such a general barrier type stereoscopic image display device, it is possible to change the plane image display mode or the stereoscopic image display mode depending on the state of the light transmitting region 22 and the light blocking region 24 formed in the barrier panel 20 There are advantages. Due to these advantages, it has recently been applied to televisions, monitors, notebook computers, netbook computers, tablet computers, and mobile devices.

However, in a general barrier type stereoscopic image display apparatus, since the aperture ratios of the light transmitting region 22 and the light blocking region 24 formed in the barrier panel 20 are fixed based on the optimum viewing distance, A 3D crosstalk phenomenon occurs in which a left eye image and a right eye image are mixed with each other, resulting in a viewer being unable to view a stereoscopic image or feeling dizzy.

SUMMARY OF THE INVENTION The present invention provides a stereoscopic image display apparatus and a method of driving the stereoscopic image display apparatus capable of optimizing the image quality of a stereoscopic image according to a viewing distance of a viewer.

According to another aspect of the present invention, there is provided a stereoscopic image display apparatus including an image display module displaying a stereoscopic image including a left eye image and a right eye image; A position detection module for detecting position information of a viewer viewing the stereoscopic image; And a controller for calculating the viewing distance value based on the position information of the viewer detected by the position detection module and controlling the brightness of the stereoscopic image by controlling the video display module according to the calculated viewing distance value, .

The controller may decrease the luminance of the stereoscopic image when the viewing distance value is less than or equal to the reference value range and increase the luminance of the stereoscopic image when the viewing distance value is greater than or equal to the reference value range.

Wherein the image display module alternately forms a light transmitting region and a light blocking region and transmits the left eye image and the right eye image through the light transmission region and the control unit controls the brightness of the stereoscopic image and the brightness of the right eye image according to the viewing distance value, The aperture ratio of the light transmitting region can be adjusted.

The controller may correct the position of the light transmission region so that the position of the viewer according to the position information of the viewer and the central portion of the light transmission region are positioned correctly.

According to another aspect of the present invention, there is provided a method of driving a stereoscopic image display apparatus including a stereoscopic image display module including a left eye image and a right eye image, Detecting position information of a viewer watching a stereoscopic image displayed on the image display module; And calculating the viewing distance value based on the position information of the viewer and controlling the brightness of the stereoscopic image by controlling the image display module according to the calculated viewing distance value.

The step of adjusting the brightness of the stereoscopic image may decrease the brightness of the stereoscopic image when the viewing distance value is less than or equal to the reference value range and may increase the brightness of the stereoscopic image when the viewing distance value is greater than or equal to the reference value range .

The method of driving a stereoscopic image display device according to claim 1, further comprising the steps of: forming a light transmitting region and a light blocking region in the image display module alternately so as to transmit the left eye image and the right eye image through the light transmitting region; And adjusting an aperture ratio of the light transmission region according to the viewing distance value.

The method of driving the stereoscopic image display apparatus may further include correcting a position of the light transmission region so that a position of the viewer according to the position information of the viewer and a center portion of the light transmission region are positioned correctly.

Wherein the image display module includes a liquid crystal display panel in which the left eye image and the right eye image are displayed separately from each other, and a backlight unit that emits light to the liquid crystal display panel, Wherein the step of adjusting the luminance of the stereoscopic image comprises the step of adjusting the luminance of the stereoscopic image when the viewing distance value is within the reference value range, The dimming value is decreased to a range of 10% to 20%, and when the viewing distance value is equal to or more than the reference value range, the backlight dimming value can be increased to a range of 10% to 20%.

According to an aspect of the present invention, there is provided a stereoscopic image display apparatus and a method of driving the same that adjust luminance of a stereoscopic image according to a viewing distance of a viewer or simultaneously adjust an aperture ratio of a light- The 3D crosstalk phenomenon generated in the stereoscopic image can be minimized according to the viewing distance of the viewer, and the brightness and image quality of the stereoscopic image can be optimized.

According to another aspect of the present invention, there is provided a stereoscopic image display device and a method of driving the same, wherein the stereoscopic image display device and the method of driving the stereoscopic image display device according to the present invention match the viewing distance of a viewer, The brightness of the stereoscopic image can be optimized to improve the image quality of the stereoscopic image, and accurate stereoscopic images without inconvenience can be provided to the viewer.

1 is a schematic view for explaining a general barrier type stereoscopic image display apparatus.
2 is a view schematically showing a stereoscopic image display apparatus according to a first embodiment of the present invention.
3 is a block diagram schematically showing the stereoscopic image display apparatus shown in FIG.
4 is a block diagram schematically showing the video display module shown in FIG.
5A to 5C are views for explaining the aperture ratio of the light transmission region and the luminance adjustment of the stereoscopic image according to the viewing distance of the viewer in the present invention.
Figs. 6 and 7 are diagrams for explaining the positional correction of the light transmission region according to the viewer's viewing position in the present invention. Fig.
8 is a cross-sectional view for explaining the barrier panel shown in Fig.
9 is a block diagram schematically showing a stereoscopic image display apparatus according to a second embodiment of the present invention.
FIG. 10 is a view for explaining a main viewing area of a viewer detected by the control unit shown in FIG. 9. FIG.
FIG. 11 is a view for explaining luminance control for the main viewing area of the viewer shown in FIG.

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

FIG. 2 is a schematic view of a stereoscopic image display apparatus according to a first embodiment of the present invention, and FIG. 3 is a block diagram schematically showing the stereoscopic image display apparatus shown in FIG.

2 and 3, the stereoscopic image display apparatus 100 according to the first embodiment of the present invention includes an image display module 110 for displaying a stereoscopic image by separating a left eye image and a right eye image, And a controller 130 for adjusting the brightness of the stereoscopic image to correspond to the viewing distance value according to the position information of the viewer.

The image display module 110 is capable of converting a flat (or 2D) image display mode and a stereoscopic (or 3D) image display mode. The image display module 110 displays a predetermined flat image according to the flat image display mode, The image and the right eye image are separated and displayed alternately on one screen. For example, the image display module 110 may embody a stereoscopic image through a left eye image and a right eye image that pass through a light transmission region by alternately forming a light transmission region and a light blocking region. At this time, it is preferable that the light transmission region is a region through which the left eye image or the right eye image displayed on the unit pixel is transmitted to the outside, and the central portion of the light transmission region overlaps the center portion of the unit pixel. The light blocking area is for preventing mixing of the left eye image and the right eye image displayed in adjacent unit pixels, and the central part of the light blocking area is preferably superimposed on the boundary of adjacent unit pixels.

The position detection module 120 is configured to include a camera module 122. In the stereoscopic image display mode, the position detection module 120 captures a viewer 101 viewing a stereoscopic image displayed on the image display module 110 using the camera module 122, and displays the captured viewer image VI, To the control unit 130.

The control unit 130 generates digital input data and a timing synchronization signal corresponding to the display mode and provides the generated digital input data and the timing synchronization signal to the image display module 110. The stereoscopic image display device 100 may be a notebook computer, a netbook computer, a tablet computer, In case of a device, the controller 130 may be a central processing unit (CPU), a micro control unit (MCU), or a video processing module. In addition, when the stereoscopic image display apparatus 100 is a television or a monitor, the control unit 140 may be a video processing module such as a scaler or a video card, or a micro control unit (MCU).

The controller 130 of the first embodiment analyzes the viewer image VI provided from the position detection module 120 and detects the position information of the viewer 101 in the stereoscopic image display mode. For example, the control unit 130 controls the position detection module 120 according to an eye tracking method to follow the positional change of any one of the eyes, eyeballs, and eyebrows of the viewer in real time, As shown in FIG.

The control unit 130 of the first embodiment calculates the viewing distance value VDV based on the position information of the viewer 101 and controls the video display module 110 in accordance with the calculated viewing distance value VDV Thereby adjusting the brightness of the stereoscopic image. That is, the controller 130 of the first embodiment decreases the luminance of the stereoscopic image when the calculated viewing distance value VDV is less than or equal to the reference value range, and when the calculated viewing distance value VDV is equal to or greater than the reference value, Can be increased. In this case, the reference value is set based on a screen size (e.g., a diagonal length) of the image display module 110. For example, when the image size of the image display module 110 is about 1 to 1.4 times Can be set. If the viewing distance value VDV is below the reference value range, the viewer will see a bright stereoscopic image. On the contrary, if the viewing distance value VDV is equal to or greater than the reference value, the viewer will see a dark stereoscopic image.

The controller 130 of the second embodiment can adjust the aperture ratio of the light transmission region formed in the image display module 110 according to the viewing distance value VDV. For example, the control unit 130 of the second embodiment increases the aperture ratio of the light transmission region when the viewing distance value VDV is less than the reference value range and increases the viewing distance value VDV of the light transmission region Thereby decreasing the aperture ratio. At this time, the aperture ratio of the light transmitting region means the degree of transmission of the left eye image or the right eye image displayed on the unit pixel.

The controller 130 of the third embodiment can adjust the aperture ratio of the light transmission region and the luminance of the stereoscopic image according to the viewing distance value VDV. Here, the aperture ratio of the light transmission region formed in the image display module 110 has a trade off relationship between the luminance of the stereoscopic image and the 3D crosstalk. That is, when the aperture ratio of the light transmitting region increases, the brightness of the stereoscopic image increases, while the 3D crosstalk phenomenon increases. On the other hand, if the aperture ratio of the light transmission region is reduced, the brightness of the stereoscopic image is lowered while the 3D crosstalk phenomenon is reduced. Accordingly, when the viewing distance value VDV is less than or equal to the reference value range, the control unit 130 of the third embodiment increases the aperture ratio of the transmissive area and decreases the luminance of the stereoscopic image, The aperture ratio of the light transmission region is reduced and the luminance of the stereoscopic image is increased.

The control unit 130 of the fourth embodiment can correct the position of the light transmission region formed in the image display module 110 according to the position information of the viewer 101. [ For example, when the position information of the viewer 101 does not coincide with the reference position corresponding to the center of the light transmission region, the control unit 130 of the fourth embodiment shifts (corrects) the center position of the light transmission region, And coincides with the position corresponding to the position information of the viewer 101. [

In the stereoscopic image display apparatus 100 according to the first embodiment of the present invention, the luminance of the stereoscopic image is adjusted according to the viewing distance of the viewer, and at the same time, the aperture ratio of the light transmission region formed in the image display module 110 The 3D crosstalk phenomenon generated in the stereoscopic image can be minimized according to the viewing distance of the viewer, and the brightness and image quality of the stereoscopic image can be optimized. In addition, the stereoscopic image display apparatus 100 according to the first embodiment of the present invention can display the stereoscopic image in accordance with the viewing distance of the viewer, the aperture ratio of the light transmitting region, the luminance of the stereoscopic image, It is possible to optimize the luminance of the stereoscopic image according to the viewing distance of the viewer to improve the image quality of the stereoscopic image and provide accurate stereoscopic images without inconvenience to viewers.

4 is a block diagram schematically showing the video display module shown in FIG.

4, the image display module 110 according to the first embodiment of the present invention includes a liquid crystal display panel 210, a backlight unit 220, a panel driver 230, a power generator 240 ), A timing controller 250, a barrier module 260, and a backlight driver 270.

The liquid crystal display panel 210 displays a predetermined plane image or a stereoscopic image according to the display mode. Hereinafter, the liquid crystal display panel 210 will be described on the assumption that the stereoscopic images, i.e., the left eye image and the right eye image, are alternately displayed on one screen. To this end, the liquid crystal display panel 210 includes a lower substrate and an upper substrate which are adhered to each other with a liquid crystal layer (not shown) for image display interposed therebetween.

The lower substrate is a thin film transistor array substrate, and includes a plurality of pixels (not shown) formed for each of regions crossed by a plurality of gate lines (not shown) and a plurality of data lines (not shown). Each pixel may include a thin film transistor (not shown) connected to a gate line and a data line, a pixel electrode connected to the thin film transistor, and a common electrode formed adjacent to the pixel electrode and supplied with a common voltage. At this time, the common electrode may be formed on the lower substrate according to the driving method of the liquid crystal layer for image display. The lower substrate controls an optical transmittance of the liquid crystal layer by forming an electric field corresponding to a difference voltage between a data voltage and a common voltage applied to each pixel.

The upper substrate is a color filter array substrate, and is configured to include a color filter corresponding to each pixel formed on the lower substrate, and is adhered to and opposed to the lower substrate with a liquid crystal layer therebetween. At this time, a common electrode to which a common voltage is supplied may be formed on the upper substrate according to a driving method of a liquid crystal layer for image display. The upper substrate may filter the incident light transmitted through the image display liquid crystal layer with a color filter to emit a predetermined color light to the outside so that a predetermined left eye image and right eye image are alternately displayed on the liquid crystal display panel 210 .

Polarizing films may be attached to the upper and lower surfaces of the liquid crystal display panel 210, respectively.

The backlight unit 220 is disposed on the back surface of the liquid crystal display panel 210 and is driven by the backlight driving unit 270 to irradiate the liquid crystal display panel 210 with light. The backlight unit 220 is an edge type. The edge backlight unit 220 includes a plurality of optical sheets disposed below the liquid crystal display panel 210, a light guide plate And a plurality of light sources including a light emitting diode or a fluorescent lamp disposed on at least one side of the light guide plate. On the other hand, the edge-type backlight unit 220 divides the liquid crystal display panel 210 into a plurality of horizontal blocks, and divides the luminance of each horizontal block into a plurality of horizontal blocks, So that the brightness-adjusted light can be sequentially irradiated to the respective horizontal blocks.

The panel driver 230 alternately displays the left eye image and the right eye image on the liquid crystal display panel 210 under the control of the timing controller 250. To this end, the panel driver 230 includes a gate driving circuit and a data driving circuit.

The gate driving circuit unit generates a gate signal in response to the gate control signal supplied from the timing controller 250 and sequentially supplies the gate signal to the gate line of the liquid crystal display panel 210. At this time, the gate driving circuit portion may be formed on one side or both sides of the lower substrate so as to be connected to each of the gate lines together with the thin film transistor manufacturing process of the display panel 240.

The data driving circuit part converts left-eye input data and right-eye input data supplied from the timing controller 250, which are supplied from the timing controller 250, into analog-type left and right eye data voltages, To the data line of the display panel 210.

The power generator 240 generates various driving voltages required to drive the respective components of the image display module 110 using the input power Vin input from the outside.

The timing controller 250 controls the driving of the panel driver 230, the barrier module 260, and the backlight driver 270, respectively.

Specifically, the timing controller 250 aligns the digital input data (RGB) provided from the control unit 130 so as to be suitable for driving the liquid crystal display panel 210, and provides the data to the data driving circuit unit. In addition, the timing controller 250 generates a gate control signal and a data control signal, respectively, based on the timing synchronization signal TSS provided from the control unit 130, and controls the driving timing of each of the gate driving circuit and the data driving circuit unit .

In the flat image display mode, the timing controller 250 analyzes the input data (RGB) of one frame to be displayed on the liquid crystal display panel 210 to generate a backlight dimming value DIM and provides it to the backlight driver 270 Thereby controlling the luminance of the backlight unit 220. At this time, the timing controller 250 may analyze the input data (RGB) in units of the horizontal blocks described above to generate a plurality of backlight dimming values (DIM) so that the backlight unit 220 can be sequentially driven.

In the stereoscopic image display mode, the timing controller 250 according to an exemplary embodiment analyzes the input data RGB to generate a backlight dimming value DIM, and outputs the generated backlight dimming value DIM to the controller 130 And adjusts the luminance of the backlight unit 220 according to the viewing distance value VDV by providing the backlight driver 270 with the corrected viewing distance value VDV. In this case, the timing controller 250 decreases the backlight dimming value DIM so that the luminance of the stereoscopic image, that is, the luminance of the backlight unit 220, is reduced when the viewing distance value VDV is within the reference value range, The backlight dimming value DIM is decreased so that the brightness of the stereoscopic image, that is, the brightness of the backlight unit 220, is increased when the distance value VDV is equal to or greater than the reference value.

For example, the timing controller 250 according to an embodiment calculates the viewing distance value (dv) calculated by the current viewing distance dv detected according to the current viewing position Pv of the viewer The backlight dimming value DIM generated based on the input data RGB is supplied to the backlight driver 270 as it is when the reference voltage VDV corresponds to the reference value range corresponding to the optimum viewing distance dr.

5B, the timing controller 250 according to the embodiment compares the viewing distance value VDV (t) calculated by the current viewing distance dv detected according to the current viewing position Pv of the viewer Of the backlight dimming value DIM generated based on the input data RGB is in a range of 10% to 20%, depending on the current viewing distance dv, when the current viewing distance d is less than or equal to the reference value range corresponding to the optimum viewing distance dr. And supplies it to the backlight driver 270.

5C, the timing controller 250 according to the embodiment compares the viewing distance value VDV calculated by the current viewing distance dv detected according to the current viewing position Pv of the viewer, The dimming value DIM generated based on the input data RGB is increased in the range of 10% to 20% in accordance with the current viewing distance dv when the current viewing distance dd is equal to or larger than the reference value range corresponding to the optimum viewing distance dr. And supplies it to the backlight driver 270.

The timing controller 250 according to the embodiment of the present invention compensates the dimming value for each viewing distance according to an experiment to obtain a backlight dimming value DIM corresponding to the viewing distance value VDV in a look- And supplies it to the backlight driver 270.

In the stereoscopic image display mode, the timing controller 250 according to another embodiment corrects the backlight dimming value DIM based on the viewing distance value VDV, and at the same time, corrects the aperture ratio of the light transmitting region formed in the barrier module 260 . In this case, the timing controller 250 increases the aperture ratio of the light transmission region when the viewing distance value VDV is equal to or smaller than the reference value range, and at the same time reduces the luminance of the stereoscopic image, The dimming value DIM is decreased and when the viewing distance value VDV is equal to or larger than the reference value, the aperture ratio of the light transmitting region is reduced and the luminance of the stereoscopic image, that is, the luminance of the backlight unit 220, Decrease the value (DIM). To this end, the timing controller 250 according to another embodiment extracts an aperture ratio of a light transmission region corresponding to the viewing distance value VDV in a lookup table that is optimized for each viewing distance by an experiment, Barrier addressing data according to the aperture ratio of the light-transmitting region to provide the barrier module 260. [

For example, the timing controller 250 according to another embodiment may calculate the viewing distance value (dv) calculated by the current viewing distance dv detected according to the current viewing position Pv of the viewer The reference barrier addressing data for forming the aperture ratio Ov of the light transmitting region LTA at the reference aperture ratio Or is generated when the VDD is within the reference value range corresponding to the optimum viewing distance dr, Module 260 and simultaneously supplies the backlight dimming value DIM generated based on the input data RGB to the backlight driver 270 as it is.

On the other hand, the timing controller 250 according to another embodiment calculates the viewing distance value VDV (VDV) calculated by the current viewing distance dv detected according to the current viewing position Pv of the viewer, as shown in FIG. 5B Is equal to or smaller than a reference value range corresponding to the optimum viewing distance dr, the barrier addressing data is set such that the aperture ratio Ov of the light transmitting region LTA is increased from the reference aperture ratio Or in accordance with the viewing distance value VDV And provides the barrier module 260 while decreasing the backlight dimming value DIM generated based on the input data RGB to a range of 10% to 20% according to the current viewing distance dv, 270).

5C, the timing controller 250 according to another embodiment compares the viewing distance value VDV calculated by the current viewing distance dv detected according to the current viewing position Pv of the viewer, The barrier addressing data is generated so that the aperture ratio Ov of the light transmitting region LTA is lower than the reference aperture ratio Or in accordance with the viewing distance value VDV in the case where the reference viewing distance dr is equal to or larger than the reference viewing distance dr The barrier module 260 is provided and the backlight dimming value DIM generated based on the input data RGB is increased in the range of 10% to 20% according to the current viewing distance dv, .

On the other hand, the timing controller 250 according to another embodiment detects the viewing point on the liquid crystal display panel 210 viewed by the viewer 101 based on the current viewing position Pv of the viewer and the viewing distance value VDV , The aperture ratio of the light transmitting region LTA increases or decreases stepwise according to the viewing distance value VDV according to the distance in the ± X axis and the Y axis direction between the detected viewing point and the edge of the liquid crystal display panel 210 So as to generate barrier addressing data.

In the stereoscopic image display mode, the timing controller 250 according to another embodiment controls the position of the light transmitting region formed in the barrier module 260 based on the viewer position information provided from the controller 130, And provides it to the barrier module 260. The barrier-

6 (a), the viewing position CP according to the viewing position information of the viewer 101 is shifted from the central portion LBA_C of the light blocking area LBA by "+ X" The timing controller 250 of the timing controller 250 according to another embodiment sets the center portion LBA_C of the light blocking region LBA to "+ " as shown in Fig. 6B, Quot; X "to generate barrier shift data for correct positioning at the viewing position CP of the viewer 101. [

7 (a), the viewing position CP in accordance with the viewing position information of the viewer 101 is positioned to the left by "-X" from the central portion LBA_C of the light blocking area LBA The timing controller 250 of the timing controller 250 according to another embodiment sets the center portion LBA_C of the light blocking area LBA to "-X" as shown in FIG. 7 (b) (LBA ") to the left of the viewer 101 to generate barrier shift data for positioning the viewer 101 at the viewing position CP.

The barrier module 260 is disposed so as to overlap the liquid crystal display panel 210 and is provided with a light transmitting region and a light blocking region for transmitting or blocking the left eye image and the right eye image according to the barrier addressing data provided from the timing controller 250 Alternately. To this end, the barrier module 260 comprises a barrier panel 262 and a barrier driver 264, as shown in Figs. 4-8.

The barrier panel 262 includes a first substrate 310, a plurality of address electrodes 320, a second substrate 330, a counter electrode 340, a barrier liquid crystal layer 350, and an upper polarizing member 360 .

The first substrate 310 is arranged on the liquid crystal display panel 210 as a glass substrate or a plastic substrate made of a transparent material. At this time, the first substrate 310 may be attached to or adhered to the entire upper surface of the liquid crystal display panel 210.

The plurality of address electrodes 320 are formed on the first substrate 310 to drive the barrier liquid crystal layer 350 according to a barrier voltage individually addressed from the barrier driver 264, And a light shielding region LBA is formed between the plurality of light transmission regions LTA.

Each of the plurality of address electrodes 320 may have a single layer structure and may be formed on the first substrate 310 so as to be spaced apart from each other by a predetermined distance.

Each of the plurality of address electrodes 320 according to another embodiment is formed in a multilayer structure that is formed in a line so as to be spaced apart from the first substrate 310 at regular intervals and staggered in a zigzag pattern with an insulating film 322 interposed therebetween. For example, each of the plurality of address electrodes 320 may be formed in a two-layer structure with an insulating film 322 sandwiched therebetween. In this case, each of the address electrodes 320 formed on the insulating film 322 may include a first And between the address electrodes 320 formed on the substrate 310. When each of the plurality of address electrodes 320 is formed in a multi-layered structure, the light transmission area LTA and the light blocking area LBA formed in the barrier panel 262 can be finely controlled, Each of the transmissive area LTA and the light shielding area LBA can be formed in the form of a lens.

Although the plurality of address electrodes 320 are preferably formed of a transparent conductive material, they may be formed of an opaque metal material if the line width is small enough not to deteriorate the brightness of the stereoscopic image display device.

The second substrate 330 is a glass substrate or a plastic substrate made of a transparent material and is adhered to the first substrate 310 with the barrier liquid crystal layer 350 interposed therebetween.

The counter electrode 340 is formed of a transparent conductive material on the second substrate 330 facing the first substrate 310 and a common voltage or a ground voltage is supplied from the barrier driver 264. In this case, the counter electrode 340 is preferably formed on the opposite surface of the second substrate 330 facing the first substrate 310, but may be formed on each of the plurality of address electrodes 320 formed on the first substrate 310 May be formed on the second substrate 330 so as to overlap with each other. In this case, it is preferable that the plurality of counter electrodes 340 are formed of a transparent conductive material, but they may be formed of an opaque metal material when the line width is small enough not to lower the luminance of the stereoscopic image display device.

The barrier liquid crystal layer 350 is formed between the first and second substrates 310 and 330 and may be composed of a twisted nematic (TN) or a super twisted nematic (STN) liquid crystal. In the barrier liquid crystal layer 350, the molecular alignment of the liquid crystal is changed according to the barrier voltage applied to each of the plurality of address electrodes 320, so that the light transmitting region LTA and the light blocking region LBA are formed in the barrier panel 262 Alternately. To this end, the barrier panel 262 is preferably driven in a normally white mode. Here, the barrier panel 262 in the normally white mode forms a light blocking area (LBA) only when a barrier voltage is applied to a plurality of address electrodes 320.

The upper polarizing member 360 is disposed on the outer exposed surface of the second substrate 330 of the barrier panel 262 and serves to block light that is not completely blocked by the light blocking area LBA. That is, the upper polarizing member 360 exits only the light passing through the light transmitting region LTA of the barrier panel 262 to the outside.

The barrier panel 262 may include a first alignment layer (not shown) formed on the first substrate 310 and a second substrate 330 to cover the opposing electrode 340 to cover the plurality of address electrodes 320. [ And a second alignment layer (not shown) formed on the first alignment layer. At this time, each of the first and second alignment layers is formed with the barrier liquid crystal layer 350 interposed therebetween, so that the liquid crystal molecules of the barrier liquid crystal layer 350 are arranged in a predetermined state so that the barrier liquid crystal layer 350 is in a normally white mode White Mode).

The barrier driver 264 generates first and second different barrier voltages according to the barrier addressing data supplied from the timing controller 250 and individually addresses the address electrodes 320 of the barrier panel 262 A light blocking area LBA is formed in the barrier panel 262 between a plurality of light transmission areas LTA and a plurality of light transmission areas LTA having a predetermined aperture ratio. At this time, the first barrier voltage has the same voltage level as the voltage applied to the counter electrode 340, and the second barrier voltage has a predetermined voltage level for changing the alignment state of the liquid crystal molecules in the barrier liquid crystal layer 350.

Specifically, in the planar image display mode, the barrier driver 264 generates only the first barrier voltage in accordance with the barrier addressing data of the timing controller 250 described above, and applies the first barrier voltage to the address electrodes 320 of the barrier panel 262 individually Thereby forming a light transmitting region LTA over the entire barrier panel 262. [ Accordingly, the plane image displayed on the liquid crystal display panel 210 is transmitted through the barrier panel 262 in the normally white state.

In the stereoscopic image display mode, the barrier driver 264 selectively generates a plurality of first and second barrier voltages according to the barrier addressing data supplied based on the viewing distance value VDV from the timing controller 250 Addressing is performed on each of the plurality of address electrodes 320 formed on the barrier panel 262 individually. Accordingly, the barrier liquid crystal layer 350 formed on the plurality of address electrodes 320 ("?" In Fig. 6) to which the second barrier voltage is applied is driven by the second barrier voltage, The barrier liquid crystal layer 350 formed on the plurality of address electrodes 320 ("" in Fig. 6) to which the first barrier voltage is applied is not driven by the first barrier voltage, Thereby forming a light shielding area (LBA). Therefore, since the light transmitting region LTA and the light blocking region LBA are alternately formed in the barrier panel 262, the left eye image LI and the right eye image RI, which are displayed on the liquid crystal display panel 210, Is transmitted through the transmission region (LTA) and is emitted to the outside. As a result, the barrier driving unit 264 adjusts the aperture ratio of the light transmitting region LTA formed in the barrier panel 262 according to the viewing distance of the viewer, as shown in Figs. 5A to 5C, 6 and 7, the center of the light transmitting area LTA formed in the barrier panel 262 is corrected to be positioned at the viewing position of the viewer.

4, the backlight driving unit 270 drives the backlight unit 220 in accordance with the backlight dimming value DIM supplied from the timing controller 250 to drive the backlight unit 220 to emit light of a predetermined luminance So that light is irradiated on the liquid crystal display panel 210. Accordingly, the luminance of the backlight unit 220 is adjusted according to the viewing distance of the viewer, as shown in Figs. 5A to 5C.

The image display module 110 according to the first embodiment of the present invention is applied to the liquid crystal display panel 210 from the backlight unit 220 according to the viewing distance value VDV provided from the controller 130 The brightness and the image quality of the stereoscopic image can be optimized according to the viewing distance of the viewer by adjusting the luminance of the stereoscopic image displayed on the image display panel 210 by adjusting the luminance of the light. The image display module 110 according to the first embodiment of the present invention may be configured such that the light emitted from the backlight unit 220 to the liquid crystal display panel 210 according to the viewing distance value VDV provided from the controller 130 The luminance of the stereoscopic image displayed on the image display panel 210 is adjusted by controlling the luminance and the aperture ratio of the light transmission region LTA formed in the barrier module 262, The generated 3D crosstalk phenomenon can be minimized and the luminance and image quality of the stereoscopic image can be optimized.

9 is a block diagram schematically showing a stereoscopic image display apparatus according to a second embodiment of the present invention.

Referring to FIG. 9, the stereoscopic image display apparatus 400 according to the second embodiment of the present invention includes an image display module 410, a position detection module 120, and a controller 430.

First, the controller 430 may be configured to display the same image as the controller 130 according to any one of the first to fourth embodiments of the stereoscopic image display apparatus 100 according to the first embodiment of the present invention shown in FIG. Axis, Y-axis, and Z-axis coordinates corresponding to the position information of the viewer 101 calculated according to the eye tracking of the camera module are analyzed, and as shown in FIG. 10, 101 and provides the main display area information corresponding to the main viewing area MVA of the detected viewer 101 to the video display module 410. [

The image display module 410 according to the second embodiment of the present invention includes a liquid crystal display panel 210, a backlight unit 420, a panel driver 230, a power generator 240, a local dimming controller 440, A timing controller 450, a barrier module 260, and a backlight driver 470. The image display module 410 according to the second embodiment of the present invention having the above configuration is the same as the image display module 110 shown in Fig. 4 except that it further includes the local dimming control unit 440 The backlight unit 420, the timing controller 450, and the backlight driver 470 are the same as those of the image display module 110 shown in FIG. 4, A duplicate description thereof will be omitted.

The backlight unit 420 is disposed on the back surface of the liquid crystal display panel 210 and is driven by the backlight driving unit 470 to irradiate the liquid crystal display panel 210 with light. The backlight unit 420 is a direct type in which the direct backlight unit 420 includes a plurality of optical sheets disposed below the liquid crystal display panel 210, And a plurality of light sources including a light emitting diode (LED) or a fluorescent lamp disposed at the lower part of the diffusion plate.

11, the direct-type backlight unit 420 divides the liquid crystal display panel 210 into a plurality of blocks 422 in a lattice form, and stores input data to be supplied to each of the blocks 422 (422) by individually driving the light sources in units of blocks 422 according to the block-by-block dimming value (BDIM) generated according to the RGB values.

The local dimming control unit 440 calculates the dimming value BDIM for each block through analysis of the digital input data RGB input from the control unit 130 and outputs the input data RGB) by compensating the luminance of the luminance signal R'G'B. Specifically, the local dimming control unit 440 calculates a representative value for each block by summing and averaging the maximum value (or average value) of the input data RGB for each pixel on a block-by-block basis. Then, the local dimming control unit 440 selects and outputs a dimming value BDim for each block corresponding to a representative value for each block in a preset look-up table (not shown). The lookup table selects and outputs a dimming value stored at an address corresponding to each of the representative values for each block input from the dimming values previously mapped corresponding to a predetermined dimming curve, as a dimming value (BDim) for each block. The local dimming control unit 440 then reflects a predetermined gain value on the block-by-block dimming value BDim to the input data RGB of each block to compensate the brightness of the input data RGB, R'G'B).

In the stereoscopic image display mode, the local dimming control unit 440 according to one embodiment corrects the dimming value BDIM for each block according to the viewing distance value VDV input from the control unit 130, ).

For example, as shown in FIG. 5A, the local dimming control unit 440 according to an embodiment calculates the viewing distance value dv calculated based on the current viewing distance dv detected according to the current viewing position Pv of the viewer The block-by-block dimming value BDim generated based on the block-by-block input data RGB is directly input to the backlight driver 470 when the voltage VDV corresponds to the reference value range corresponding to the optimum viewing distance dr Supply.

On the other hand, the local dimming control unit 440 according to the embodiment calculates the viewing distance value (dv) calculated by the current viewing distance dv detected according to the current viewing position Pv of the viewer The dimming value BDim for each block generated based on the input data RGB for each block is set to 10% to 10% according to the current viewing distance dv when the current viewing distance dv is equal to or less than the reference value range corresponding to the optimum viewing distance dr. 20% and supplies it to the backlight driver 470.

5C, the local dimming control unit 440 calculates the viewing distance value VDV (VDV) calculated based on the current viewing distance dv detected according to the current viewing position Pv of the viewer ) According to the current viewing distance (dv), the dimming value (BDIM) for each block generated based on the input data RGB for each block is 10% to 20 % And supplies it to the backlight driver 470. [

The local dimming control unit 440 according to the embodiment of the present invention compensates the dimming value for each viewing distance according to an experiment so that the dimming value for each block corresponding to the viewing distance value VDV in the lookup table And supplies it to the backlight driver 470.

11, the local dimming control unit 440 according to another embodiment controls the display of the main viewing direction of the viewer 101 provided from the control unit 430 described above in the blocks 422 of the backlight unit 420, At least one main viewing block overlapped with the MVA may be detected and the dimming value (BDIM) of each detected main viewing block may be corrected and provided to the backlight driver 470. In this case, the local dimming control unit 440 according to another embodiment may increase the dimming value (BDIM) of each of the main viewing blocks in the range of 10% to 20% and supply it to the backlight driving unit 470, It is possible to reduce the dimming value (BDIM) for each block of the remaining blocks 422 except the blocks to 10% to 20% and supply the reduced dimming value to the backlight driver 470.

The local dimming control unit 440 may be embedded in the timing controller 450 as described above.

The timing controller 450 controls the driving of the panel driver 230, the barrier module 260, and the backlight driver 470, respectively.

Specifically, the timing controller 450 arranges the modulated data (R'G'B ') input from the local dimming control unit 440 to be suitable for driving the liquid crystal display panel 210 and provides the modulated data to the data driving circuit unit The timing controller 250 shown in FIG. 4 performs the same functions as the timing controller 250 shown in FIG.

The backlight driver 470 individually drives each block of the backlight unit 420 in accordance with the dimming value DIM of each block input from the local dimming control unit 440 so that the luminance is adjusted from the backlight unit 420 So that light is irradiated on the liquid crystal display panel 210. Accordingly, the brightness of the backlight unit 420 is adjusted on a block-by-block basis or as a whole according to the viewing distance of the viewer, as shown in Figs. 5A to 5C.

The image display module 410 according to the second embodiment of the present invention not only provides the same effect as the image display module 110 shown in FIG. 2, but also includes a backlight unit 440 using the local dimming control unit 440, The power consumption can be reduced through the local dimming of the video signal 420 and the luminance compensation of the input data RGB and the backlight unit 420 overlapped with the main viewing area MVA of the viewer 101 provided from the controller 430 The brightness of the blocks of the stereoscopic image can be adjusted to increase the immersion of the viewer 101 in the stereoscopic image.

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

100: stereoscopic image display device 110: image display module
120: Position detection module 130:
210: liquid crystal display panel 220: backlight unit
230: panel driving unit 240: power generating unit
250: timing controller 260: barrier module
270: Backlight driver

Claims (14)

An image display module for displaying a stereoscopic image including a left eye image and a right eye image;
A position detection module for detecting position information of a viewer viewing the stereoscopic image; And
And a control unit for calculating the viewing distance value based on the position information of the viewer and controlling the brightness of the stereoscopic image by controlling the video display module according to the calculated viewing distance value,
Wherein the image display module comprises:
A liquid crystal display panel in which the left eye image and the right eye image are displayed separately; And
And a barrier module arranged to overlap the liquid crystal display panel and alternately forming a light transmitting area and a light blocking area through a plurality of address electrodes electrically separated from each other,
Wherein the control unit varies positions of the light transmitting region and the light blocking region through separate addressing of the plurality of address electrodes,
The plurality of address electrodes are formed in a multi-layer structure staggered with an insulating film sandwiched therebetween, and at least two address electrodes disposed adjacent to one another on the same plane among the plurality of address electrodes receive the same barrier voltage, And forms a light transmission region or a light blocking region. delete The method according to claim 1,
Wherein the control unit increases the aperture ratio of the light transmission region and reduces the luminance of the stereoscopic image when the viewing distance value is less than or equal to the reference value range and adjusts the aperture ratio of the light transmission region And increases the brightness of the stereoscopic image. The method according to claim 1,
Wherein the controller corrects the position of the light transmission region so that the position of the viewer according to the position information of the viewer and the central portion of the light transmission region are positioned correctly. The method according to claim 1,
Wherein the image display module comprises:
A backlight unit for emitting light to the liquid crystal display panel;
A timing controller for generating a backlight dimming value for controlling the backlight unit based on inputted input data and correcting the backlight dimming value in accordance with the viewing distance value; And
And a backlight driver for driving the backlight unit according to the corrected backlight dimming value supplied from the timing controller. 6. The method of claim 5,
The timing controller includes:
Controlling the barrier module so that the aperture ratio of the light transmission region is increased when the viewing distance value is less than or equal to a reference value range, decreasing the backlight dimming value so that the brightness of the backlight unit is reduced,
And controls the barrier module to decrease the aperture ratio of the light transmission region when the viewing distance value is equal to or greater than the reference value range, and increases the backlight dimming value so that the brightness of the backlight unit is increased. The method according to claim 5 or 6,
The timing controller includes:
And decreasing the backlight dimming value to a range of 10% to 20% when the viewing distance value is less than the reference value range,
Wherein the backlight dimming value is increased to a range of 10% to 20% when the viewing distance value is equal to or greater than a reference value range. The method according to claim 1,
Wherein the image display module comprises:
A panel driver for separating and displaying the left eye image and the right eye image on the liquid crystal display panel;
A backlight unit for dividing the liquid crystal display panel into a plurality of blocks and irradiating light to each block;
The method includes generating a dimming value for each block by analyzing input data to be displayed on the liquid crystal display panel in block units, correcting the dimming value for each block according to the viewing distance value, A local dimming control unit for modulating input data of a block to generate modulated data;
A timing controller for supplying the modulation data to the panel driver and controlling the barrier module according to the viewing distance value; And
And a backlight driving unit driving each block of the backlight unit individually according to the corrected dimming value for each block. 9. The method of claim 8,
The local dimming control unit detects a main viewing area of the viewer based on the position information of the viewer and the viewing distance value and detects at least one main viewing block overlapping the main viewing area detected from the plurality of blocks And adjust dimming values for each block of the main viewing blocks. A method of driving a stereoscopic image display device including an image display module in which a stereoscopic image composed of a left eye image and a right eye image is displayed,
Detecting position information of a viewer watching a stereoscopic image displayed on the image display module;
Calculating an viewing distance value based on the position information of the viewer and controlling the brightness of the stereoscopic image by controlling the image display module according to the calculated viewing distance value; And
And transmitting the left eye image and the right eye image through the light transmission region by alternately forming a light transmission region and a light blocking region in the image display module,
Wherein the step of transmitting the left eye image and the right eye image through the light transmitting region comprises:
A light transmitting region and a light shielding region are alternately formed through a plurality of address electrodes that are disposed to overlap with the liquid crystal display panel in which the left eye image and the right eye image are displayed separately from each other and are electrically isolated from each other, Varying the position of the light transmitting region and the light blocking region through separate addressing; And
Two or more address electrodes disposed adjacent to the same plane among a plurality of address electrodes having a multilayer structure staggered with an insulating film sandwiched in a zigzag form receive the same barrier voltage to form one light transmission region or one light blocking region The method comprising the steps of: 11. The method of claim 10,
Wherein the adjusting the luminance of the stereoscopic image comprises:
Wherein the luminance of the stereoscopic image is decreased when the viewing distance value is less than or equal to the reference value range and the luminance of the stereoscopic image is increased when the viewing distance value is greater than or equal to the reference value range. 11. The method of claim 10,
Wherein the step of transmitting the left eye image and the right eye image through the light transmitting region comprises:
And increasing an aperture ratio of the light transmission region when the viewing distance value is less than or equal to a reference value range and decreasing an aperture ratio of the light transmission region when the viewing distance value is greater than or equal to the reference value range. 11. The method of claim 10,
And correcting a position of the light transmission region such that a position of the viewer according to the position information of the viewer and a central portion of the light transmission region are positioned correctly. 11. The method of claim 10,
Wherein the image display module includes the liquid crystal display panel and a backlight unit for irradiating the liquid crystal display panel with light,
Further comprising generating a backlight dimming value for controlling the backlight unit based on input data to be input,
Wherein the adjusting the luminance of the stereoscopic image comprises:
And decreasing the backlight dimming value to a range of 10% to 20% when the viewing distance value is within a reference value range,
Wherein the backlight dimming value is increased to a range of 10% to 20% when the viewing distance value is equal to or greater than a reference value range.

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