KR101922722B1 - Stereoscopic image display device - Google Patents

Abstract

An embodiment of the present invention is a display device comprising: a display panel for displaying a 2D image in a 2D mode and displaying a multi-view image in a 3D mode; A 3D filter that passes light generated from the display panel in the 2D mode and partially passes light generated from the display panel in the 3D mode; A user input unit for receiving the number of viewers from the user and the position of the viewer in the 3D mode; A view signal generator for generating a number signal of the viewer according to the number of viewers inputted from the user input unit and a position signal of the viewer according to the position of the viewer; A multi-view image converter for outputting the input image data in the 2D mode, and changing the resolution of the image data according to the number signal of the viewer in the 3D mode to convert the multi-view image data into the multi-view image data; And a 3D filter driver for supplying a driving voltage for controlling the 3D filter according to the number of viewers and the position signal of the viewer in the 3D mode.

Description

[0001] STEREOSCOPIC IMAGE DISPLAY DEVICE [0002]

An embodiment of the present invention relates to a stereoscopic image display device.

The stereoscopic display is divided into a stereoscopic technique and an autostereoscopic technique. The binocular parallax method uses parallax images of right and left eyes with large stereoscopic effect, and both glasses and non-glasses are used, and both methods are practically used. In the spectacle method, polarized light of right and left parallax images is displayed alternately on a direct view type display device or a projector, a stereoscopic image is implemented using polarizing glasses, a right and left parallax image is displayed in a time division manner, and a stereoscopic image is implemented using shutter glasses. In the non-eyeglass system, stereoscopic images are realized by separating the optical axes of left and right parallax images using a 3D filter such as a parallax barrier or a lenticular sheet.

A parallax barrier type stereoscopic image display device includes a parallax barrier positioned between a display panel and a user. Parallax Barrier separates the left eye image and the right eye image to realize a stereoscopic image. However, the parallax barrier method has a disadvantage in that brightness is lost when a 2D image is implemented due to a barrier. Accordingly, a stereoscopic image display device of a switchable barrier type in which an electric field is applied to a liquid crystal to selectively view 2D and 3D images has been proposed.

A switchable barrier type stereoscopic image display device realizes a stereoscopic image by separating a stereoscopic image displayed on a display panel using a barrier. At this time, the view of the stereoscopic image is generated by taking an image of the object by separating the cameras from each other by a distance of two sides of the general person. In this process, when an object is photographed using three cameras, the switchable barrier type stereoscopic image display device can provide stereoscopic images of three views.

When the view of the stereoscopic image is increased, the range in which the stereoscopic image can be viewed by the viewer in the positive stereoscopic region is increased, so that the quality of the stereoscopic image can be enhanced. The positive stereoscopic area means an area where the viewer's left eye sees the left view than the right eye. In this case, the viewer can see the left eye image through the left eye and see the right eye image through the right eye, so that an optimal stereoscopic image can be viewed. However, when the view of the stereoscopic image is enlarged, the number of images displayed in one pixel is increased by the number of views, which results in a lower resolution.

On the contrary, when the view of the stereoscopic image is reduced, there is an advantage that the resolution is increased. However, since the possibility of the viewer to view the stereoscopic image in the region where the stereoscopic region or the view image is mixed increases, the quality of the stereoscopic image is deteriorated. The inverse stereoscopic area means an area where the viewer's left eye sees the right view than the right eye. In this case, the viewer actually sees the right-eye image through the left eye and sees the right-eye image through the right eye, so that he feels inconvenience in viewing the stereoscopic image. In addition, the region where the view images are mixed refers to an area where the left and right eyes of the viewer see images of pixels having different pixels. In this case, the viewer feels inconvenience in viewing the stereoscopic image because the viewer views the mixed image.

Therefore, in order to optimally maintain the resolution of the stereoscopic image and the display quality of the stereoscopic image, the conventional stereoscopic image display device needs to control the image data and control the 3D filter correspondingly to the view of the stereoscopic image.

According to an embodiment of the present invention for solving the problems of the background art described above, a variable resolution and a variable control method according to the actual viewer number and position are applied to improve the resolution of a stereoscopic image and the display quality of a stereoscopic image, Type multi-view image display device.

According to an embodiment of the present invention, there is provided a display panel for displaying a 2D image in a 2D mode and displaying a multi-view image in a 3D mode; A 3D filter that passes light generated from the display panel in the 2D mode and partially passes light generated from the display panel in the 3D mode; A user input unit for receiving the number of viewers from the user and the position of the viewer in the 3D mode; A view signal generator for generating a number signal of the viewer according to the number of viewers inputted from the user input unit and a position signal of the viewer according to the position of the viewer; A multi-view image converter for outputting the input image data in the 2D mode, and changing the resolution of the image data according to the number signal of the viewer in the 3D mode to convert the multi-view image data into the multi-view image data; And a 3D filter driver for supplying a driving voltage for controlling the 3D filter according to the number of viewers and the position signal of the viewer in the 3D mode.

The multi-view image conversion unit may reconstruct the view map of the image data according to the number signal of the viewer to convert the single-view resolution to the full resolution / number of viewers.

The 3D filter driver includes a lookup table storing driving voltage data classified by the number of viewers and the position signal of the viewer, a driving voltage controller reading the driving voltage data stored in the lookup table corresponding to the number of viewers and the viewer's position signal And a driving voltage supply unit for supplying a driving voltage to the 3D filter using driving voltage data read by the driving voltage control unit.

The 3D filter may be a switchable barrier filter having blocking portions for blocking light transmitted through the display panel in the 3D mode.

In the switchable barrier filter, the number of transmissive portions and blocking portions is determined according to the number signal of the viewer, and the positions of the transmissive portions and the blocking portions can be varied according to the position signal of the viewer.

The 3D filter may be a liquid crystal lens filter having lenses that refract light generated from the display panel in the 3D mode.

In the liquid crystal lens filter, the number of lenses is determined according to the number signal of the viewer, and the refractive index of the lenses can be varied according to the position signal of the viewer.

The 3D filter includes a first film, a first linear polarizer formed on the lower surface of the first film, split electrodes formed on the upper surface of the first film, a second film spaced apart from the first film, A front line electrode formed on a lower surface of the second film, and a liquid crystal layer disposed between the first film and the second film.

The 3D filter includes a first film, split electrodes formed on the upper surface of the first film, a second film facing the first film, a front electrode formed on the lower surface of the second film, Lt; RTI ID = 0.0 > 2 < / RTI > films.

The 3D filter includes a first film, a first front electrode formed on an upper surface of the first film, a second film opposing the first film, first dividing electrodes formed on a lower surface of the second film, A liquid crystal layer disposed between the first film and the second film; second split electrodes formed on the upper surface of the second film; a third film facing the second film; a third film formed on the lower surface of the third film; 2 front electrode, and a liquid crystal lens layer positioned between the second film and the third film.

In the embodiment of the present invention, a variable resolution according to the number of actual viewers is applied to support a maximum resolution according to the number of actual viewers, and a variable control method of changing the position or refractive index of light transmitted according to a viewer's position, There is an effect of providing a non-eyeglass multi-view stereoscopic image display device capable of improving display quality of stereoscopic images.

1 is a block diagram schematically illustrating a stereoscopic image display apparatus according to an embodiment of the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a stereoscopic image display apparatus and a stereoscopic image display apparatus.
3 is a flowchart illustrating a driving concept of a stereoscopic image display apparatus according to an exemplary embodiment of the present invention.
4 is a block diagram of a part of a stereoscopic image display apparatus according to an embodiment of the present invention.
5 is a view showing display of multi-view image data according to the number of viewers;
6 is a view showing a control state of a 3D filter according to the number of viewers;
7 is a cross-sectional exemplary view of a 3D filter according to the first embodiment;
8 is a cross-sectional exemplary view of a 3D filter according to a second embodiment;
9 is a cross-sectional exemplary view of a 3D filter according to a third embodiment;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

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

1, the stereoscopic image display apparatus includes a display panel 10, a 3D filter 180, a gate driver 110, a data driver 120, a 3D filter driver 130, A timing controller 140, a multi-view image converter 150, a host system 160, a view signal generator 170, and a user input unit 190.

The display panel 10 displays an image under the control of the timing controller 140. Various panels may be selected for the display panel 10, but the liquid crystal panel 10 selected in the embodiment will be described as an example. On the TFT substrate of the liquid crystal panel 10, the data lines D and the gate lines G (or scan lines) cross each other. On the color filter substrate of the liquid crystal panel 10, a black matrix, a color filter, and the like are formed. The liquid crystal panel 10 is formed with subpixels in the cell regions defined by the data lines D and the gate lines G. [ A pixel electrode and a common electrode are formed in the subpixels, and a liquid crystal layer formed between the TFT substrate and the color filter substrate is driven by an electric field formed between the pixel electrode and the common electrode.

A lower polarizer plate is attached to the TFT substrate of the liquid crystal panel 10, and an upper polarizer plate is attached to the color filter substrate. The light transmission axis of the lower polarizer and the light transmission axis of the upper polarizer may be formed to be orthogonal. An alignment film is formed on the TFT substrate and the color filter substrate of the liquid crystal panel 10 to set a pre-tilt angle of liquid crystal. A spacer for maintaining a cell gap of the liquid crystal cell is formed between the TFT substrate of the liquid crystal panel 10 and the color filter substrate.

On the other hand, when the liquid crystal panel 10 is a vertical electric field driving system such as a TN (Twisted Nematic) mode and VA (Vertical Alignment) mode, a common electrode is formed on the color filter substrate. Alternatively, when the liquid crystal panel 10 is a horizontal electric field driving method such as an IPS (In Plane Switching) mode and an FFS (Fringe Field Switching) mode, the common electrode is formed on the TFT substrate together with the pixel electrode. The liquid crystal mode of the liquid crystal panel 10 may be implemented in any liquid crystal mode as well as the TN mode, VA mode, IPS mode, and FFS mode described above.

The timing controller 140 controls the 2D image data to be addressed to the liquid crystal panel 10 in the 2D mode and controls the multi-view image data to be addressed to the liquid crystal panel 10 in the 3D mode. The multi-view image means first to n-th (n is a natural number of 2 or more) view images. The stereoscopic view is generated by taking images of the object by separating the cameras from each other by a distance of two sides of the general person. For example, when an object is photographed using four cameras, the liquid crystal panel 10 can display four-view stereoscopic images.

The timing controller 140 drives the liquid crystal panel 10 at a predetermined frame frequency based on the image data (/ RGB) and timing signals received from the multi-view image converter 150, The gate driver control signal GCS and the data driver control signal DCS can be generated. The timing controller 140 supplies the gate driver control signal GCS to the gate driver 110 and the video driver 120 to supply the video data / RGB and the data driver control signal DCS.

The data driver 120 includes a plurality of source drive ICs. The source driver ICs convert image data (/ RGB) input from the timing controller 140 into positive / negative gamma compensation voltages to generate positive / negative analog data voltages, (D).

The gate driver 110 includes a shift register, a level shifter, and an output buffer. The gate driver 110 sequentially generates gate pulses synchronized with the data voltage under the control of the timing controller 140 and supplies the generated gate pulses to the gate lines G of the liquid crystal panel 10.

The user input unit 190 is a device for receiving the number of viewers and the position of the viewer from the user (or viewer) in the 3D mode. The user input unit 180 may be a remote controller, but may be a device capable of receiving input in association with a stereoscopic image display device.

When the user inputs the number of viewers and the position of the viewer through the user input unit 180, the view signal generating unit 170 generates a view signal corresponding to the number of viewers according to the number of viewers and a position signal of the viewer according to the position of the viewer . Since the view signal generator 170 can be included in the host system 160, the following description will be made by way of example of the host system 160.

The host system 160 supplies image data RGB and timing signals to the multi-view image conversion unit 150 through an interface such as a Low Voltage Differential Signaling (LVDS) interface and a TMDS (Transition Minimized Differential Signaling) interface . In the 2D mode, the host system 160 supplies the 2D image data input from the outside to the multi-view image conversion unit 150. [ In the 3D mode, the host system 160 supplies the 3D image data including the left eye image data and the right eye image data to the multi-view image converter 150. Here, the timing signals include a vertical synchronization signal, a horizontal synchronization signal, a data enable signal (Data Enable), a dot clock, and the like.

The host system 160 supplies the 3D filter drive unit 130 and the multi-view image conversion unit 150 with a mode signal MODE that can distinguish the 2D mode or the 3D mode. The mode signal MODE may be generated at a logic low level when in the 2D mode and may be generated at a logic high level in the 3D mode, but is not limited thereto. The host system 160 supplies the viewer signal number and the viewer position signal Cview output from the view signal generator 170 to the 3D filter driver 130 and the multi-view image converter 150.

The multi-view image converter 150 receives the image data (RGB) mode signal (MODE), the number of viewers, and the viewer's position signal (Cview) from the host system 160. The multi-view image converting unit 150 may determine whether the 2D mode or the 3D mode is performed according to the mode signal MODE. In addition, the multi-view image converting unit 150 may determine the number of views of the stereoscopic image to be displayed in the 3D mode according to the number of viewers and the viewer's position signal Cview. In the 2D mode, the multi-view image conversion unit 150 outputs the image data RGB without conversion. Alternatively, in the 3D mode, the multi-view image conversion unit 150 converts the image data RGB according to the number of viewers and the position signal Cview of the viewer according to the set number of views. At this time, the multi-view image conversion unit 150 reconstructs the view map of the image data (RGB) according to the number of viewers and the viewer's number signal among the viewer's position signal Cview so that monocular resolution becomes full resolution / Conversion.

The 3D filter 180 passes light (almost all) generated from the liquid crystal panel 10 in the 2D mode as it is, and partially passes the light generated from the liquid crystal panel 10 in the 3D mode.

The 3D filter driver 130 controls the 3D filter 180 to pass the light generated from the liquid crystal panel 10 in the 2D mode as it is. In addition, the 3D filter driver 130 controls the 3D filter 180 to partially pass the light generated from the liquid crystal panel 10 in the 3D mode. In the 3D mode, the 3D filter driver 130 supplies a driving voltage for controlling the 3D filter to the 3D filter 180 according to the number of viewers and the position signal Cview of the viewer.

Hereinafter, the driving concept of the stereoscopic image display apparatus according to the comparative example and the driving concept of the stereoscopic image display apparatus according to the embodiment of the present invention will be compared.

2 is a block diagram illustrating a driving concept of a stereoscopic image display apparatus according to a comparative example and a driving concept of a stereoscopic image display apparatus according to an embodiment of the present invention.

2, the liquid crystal panel 10 of the stereoscopic image display device according to the comparative example has five multi-view images 1 to 5 set basically even though the number of viewers (3 View, 4 View) is 2, . The 3D filter 180 of the stereoscopic image display device according to the comparative example also transmits five multi-view images 1 to 5. Therefore, the stereoscopic image display device according to the comparative example has a loss resolution (1, 2, 5 View) corresponding to the number of non-viewers (1, 2, 5 View).

In contrast, in the stereoscopic image display apparatus according to the embodiment, the liquid crystal panel 10 displays two multi-view images 3 and 4 when the number of viewers (3 View, 4 View) is two. The 3D filter 180 of the stereoscopic image display device according to the embodiment also transmits the two multi-view images 3 and 4. Therefore, the stereoscopic image display apparatus according to the embodiment has a loss resolution (0) which is not corresponding to the number of non-viewers (1, 2, 5 View).

Table 1 shows the resolution improvement effect according to the application of the driving concept of the stereoscopic image display apparatus according to the embodiment of the present invention.

Even if the stereoscopic image display device is designed as a multi-view (N-View), in actual use, the actual number of viewers is not N-1, and in such a case, a resolution loss due to the number of views not contributing to the viewing is generated . It is an object of the present invention to convert such a loss resolution to a resolution effective for viewing, thereby increasing (improving) the monocular reference 3D resolution of the actual audience.

The embodiment can achieve the object of the present invention by improving the monocular resolution by a process of reconfiguration of image data with an active 3D filter 180, which will be described in detail as follows.

3 is a flowchart illustrating a driving concept of a stereoscopic image display apparatus according to an exemplary embodiment of the present invention.

As shown in FIGS. 1 to 3, the stereoscopic image display apparatus according to the embodiment does not have a loss resolution because the variable view autostereoscopic 3D (VRA) And controls the 3D filter 180 according to the number of viewers and the position.

To this end, the stereoscopic image display apparatus according to the embodiment receives the number of viewers and the viewing position through the user input unit 190 (S110)

Next, the 3D image data is obtained (S120). The 3D image data is obtained as left / right eye (L / R) images such as side by side and top-bottom. The number of viewers and the viewing position may be input after acquiring 3D image data first.

Next, the 3D image data is mapped in correspondence with the number of viewers and the viewing position (S130). The process of mapping 3D image data corresponding to the number of viewers and the viewing position is performed by the multi- .

Next, the 3D image data display and the 3D filter are controlled in accordance with the number of viewers and the viewing position. The process of displaying 3D image data on the liquid crystal panel 10 and controlling the 3D filter 180 in correspondence with the number of viewers and the viewing position is performed by the gate driver 110, the data driver 120, and the 3D filter driver 130 ).

Hereinafter, an apparatus for driving the stereoscopic image display apparatus according to the embodiment corresponding to the number of viewers and the viewing position will be described in detail.

FIG. 4 is a block diagram illustrating a part of a stereoscopic image display apparatus according to an exemplary embodiment of the present invention, FIG. 5 is a diagram illustrating display of multi-view image data according to the number of viewers, FIG. 3 shows a control state of the 3D filter.

4, a part of a stereoscopic image display apparatus according to an embodiment of the present invention includes a user input unit 180, a host system 160, a multi-view image conversion unit 150, and a 3D filter driving unit 130 Respectively.

The host system 160 includes a view signal generation unit 170 and an image supply unit 165. When the user inputs the number of viewers and the position of the viewer through the user input unit 180, the view signal generator 170 generates a viewer's number signal and a viewer's position signal Cview.

The multi-view image conversion unit 150 includes a signal determination unit 151, an image lookup table 153, and an image data mapping unit 155. The image lookup table 153 stores an image data map for reconstructing image data by the number of viewers and the number of viewers among the position signal Cview of the viewer. The signal determination unit 151 reads the data map stored in the image lookup table 153 in accordance with the number of viewers and the viewer's position signal Cview. The image data mapping unit 155 maps the multi view image data (/ RGB) to be supplied to the timing controller 140 using the image data map read by the signal determination unit 151.

As described above, the multi-view image converting unit 150 converts the image data of the sub-pixels on the liquid crystal panel 10 corresponding to the increased resolution when the resolution of the viewer is increased according to the adjustment of the active optical The value should be reset. At this time, depending on the view number, the number of viewers, the viewing position, etc., the data reconstruction method can be changed into various conditions. It is designed to be selectively applied through a video lookup table 153 which is a view map data base for each mode.

For example, when the user inputs the number of viewers to view the multi-view image through the user input unit 180 as two persons, the multi-view image conversion unit 150 performs an image data mapping process for two viewers. Then, the multi-view image converting unit 150 reconstructs the multi-view image data so that only the two multi-view images 3 and 4 are displayed on the liquid crystal panel. Accordingly, only two multi-view images 3 and 4 are displayed on the liquid crystal panel 10 as shown in Fig. 5 (a).

In another example, when the user inputs three viewers to view the multi-view image through the user input unit 180, the multi-view image conversion unit 150 performs an image data mapping process for three viewers. Then, the multi-view image converting unit 150 reconstructs the multi-view image data so that only the three multi-view images (3, 4, 5) are displayed on the liquid crystal panel. Accordingly, only three multi-view images (3, 4, 5) are displayed on the liquid crystal panel 10 as shown in FIG. 5 (b).

The 3D filter driver 130 includes a driving voltage controller 131, a filter lookup table 133, and a driving voltage supplier 135. The filter lookup table 133 stores driving voltage data classified by the number of viewers and the position signal of the viewer. The driving voltage control unit 131 reads the driving voltage data stored in the filter lookup table 133 in accordance with the number of viewers and the position signal Cview of the viewer. The driving voltage supplier 135 uses the driving voltage data read by the driving voltage controller 131 to vary the driving voltage FCS to be supplied to the 3D filter.

For example, when the user inputs the number of viewers to view the multi-view image through the user input unit 180 as two persons, the 3D filter driver 130 performs a drive voltage reading process for two viewers. The 3D filter driver 130 adjusts the aperture area and the blocking area of the 3D filter 180 corresponding to the two multi-view images 3 and 4 displayed on the liquid crystal panel. Accordingly, the 3D filter 180 is provided with an aperture region TA for transmitting only the two multi-view images 3 and 4 and a blocking region NTA for blocking the rest, as shown in FIG. 6A, The widths W1 and W2 of the two sides are adjusted.

In another example, when the user inputs three viewers to view the multi-view image through the user input unit 180, the 3D filter driver 130 performs a drive voltage reading process for three viewers. The 3D filter driver 130 adjusts the aperture area and the blocking area of the 3D filter 180 corresponding to the three multi-view images 3, 4, and 5 displayed on the liquid crystal panel. Accordingly, the 3D filter 180 is provided with an aperture region TA for transmitting only three multi-view images 3, 4 and 5 and a blocking region NTA for blocking the remaining portions, as shown in (b) And the fourth widths W3 and W4 are adjusted.

6, the first and second widths W1 and W2, which are the opening area TA and the blocking area NTA, of the 3D filter 180 are the third and fourth widths W3 , W4), because the number of multi-view images to be transmitted is different.

For example, when the three multi-view images 3, 4, and 5 are displayed on the liquid crystal panel, the 3D filter 180 may have third and fourth widths W3 and W4 that become the opening area TA and the blocking area NTA, W4 are formed to be larger than the first and second widths W1, W2.

Hereinafter, the structure of the 3D filter applicable to the stereoscopic image display device according to the embodiment of the present invention will be described in detail.

FIG. 7 is a cross-sectional view of a 3D filter according to the first embodiment, FIG. 8 is a cross-sectional view of a 3D filter according to a second embodiment, and FIG. 9 is a cross-sectional view of a 3D filter according to a third embodiment .

≪ Embodiment 1 >

7, the 3D filter 180 according to the first embodiment includes a switchable barrier (TA) filter having transparent portions (TA) for transmitting light generated from a liquid crystal panel in a 3D mode and blocking portions (NTA) (180).

The switchable barrier filter 180 determines the number of transmissive portions TA and blocking portions NTA according to the number signal of the viewer and determines the positions of the transmissive portions TA and the blocking portions NTA according to the position signal of the viewer Lt; / RTI >

To this end, the switchable barrier filter 180 includes a first film 31, a first linear polarizer 33A formed on the lower surface of the first film 31, and a second linear polarizer 33A formed on the upper surface of the first film 31 The second film 32 separated from the first film 31, the second linear polarizer 33B formed on the upper surface of the second film 32, A front electrode 36 formed on the lower surface of the first film 31 and a liquid crystal layer 35 disposed between the first film 31 and the second film 32. [

On the other hand, FIG. 7A shows an example of the driving state of the switchable barrier filter 180 when the number of viewers to view the multi-view image is two. In this case, the switchable barrier filter 180 forms the transmissive portions TA and the blocking portions NTA as shown in FIG. 6A. To this end, the first voltage V1 is supplied to the divided electrodes 34 corresponding to the transmissive portions TA and the second voltage V2 is supplied to the divided electrodes 34 corresponding to the blocking portions NTA. do. Here, although the first voltage V1 and the second voltage V2 may differ depending on the arrangement state of the liquid crystal layer 35, basically, the voltages applied to them are different.

7B is an example of the driving state of the switchable barrier filter 180 when the number of viewers to view the multi-view image is three. In this case, the switchable barrier filter 180 forms the transmissive portions TA and the blocking portions NTA as shown in FIG. 6 (b). To this end, the first voltage V1 is supplied to the divided electrodes 34 corresponding to the transmissive portions TA and the second voltage V2 is supplied to the divided electrodes 34 corresponding to the blocking portions NTA. do. Here, although the first voltage V1 and the second voltage V2 may differ depending on the arrangement state of the liquid crystal layer 35, basically, the voltages applied to them are different.

The reason why the switchable barrier filter 180 can be driven in the above-described manner is that the driving voltage output from the 3D filter driver varies in accordance with the number of viewers and the position signal Cview of the viewer.

≪ Embodiment 2 >

As shown in FIG. 8, the 3D filter 180 according to the second embodiment may be selected as the liquid crystal lens filter 180 having the lenses LS for refracting light generated from the liquid crystal panel in the 3D mode.

In the liquid crystal lens filter 180, the number of lenses LS is determined according to the number signal of the viewer, and the refractive index is varied according to the position signal of the viewer. The position of the lenses LS varies according to the number of the lenses LS so that the liquid crystal lens filter 180 can perform an operation similar to the switchable barrier filter 180 in which a region for transmitting light is controlled . Since the refractive index is variable according to the position signal of the viewer, it is possible to provide an optimized multi-view image according to the viewer's position.

The liquid crystal lens filter 180 includes a first film 31, split electrodes 34 formed on the upper surface of the first film 31, a second film 31 spaced apart from the first film 31, A front electrode 36 formed on the lower surface of the second film 32 and a liquid crystal lens layer 35 positioned between the first film 31 and the second film 32 have.

8 (a) shows an example of the driving state of the liquid crystal lens filter 180 when the number of viewers to view the multi-view image is two. In this case, the liquid crystal lens filter 180 forms the first lenses LW1 capable of separating and transmitting two multi-images. To this end, the first to m-th (m is an integer of 2 or more) voltages are supplied to the divided electrodes 34 forming the first lenses LW1, respectively. Here, the first to m-th voltages consist of voltages for making the liquid crystal lens layer 35 all in the form of the first lenses LW1.

8B is an example of the driving state of the liquid crystal lens filter 180 when the number of viewers to view the multi-view image is three. In this case, the liquid crystal lens filter 180 forms the second lenses LW2 capable of separating and transmitting three multi-images. To this end, first to nth (n is an integer greater than m) voltages are supplied to the divided electrodes 34 forming the second lenses LW2, respectively. Here, the first to n-th voltages consist of voltages for making all the liquid crystal lens layers 35 in the form of the second lenses LW2.

On the other hand, the liquid crystal lens layer 35 of the liquid crystal lens filter 180 can also be designed by a lenticular lens method. In this case, the lens plate should be designed in the form of a liquid gradient refractive index (GRIN) lens capable of adjusting the width and refractive index of the lens.

As can be seen from the above description, when the liquid crystal lens filter 180 is selected as the 3D filter 180, the size of the lenses (LW1 < LW2) increases as the number of viewers increases. In addition, when the liquid crystal lens filter 180 is selected as the 3D filter 180, the refractive index is also varied to provide a multi-view image according to the position of the viewer when the position of the viewer is changed.

&Lt; Third Embodiment >

As shown in FIG. 9, the 3D filter 180 according to the third embodiment may be selected as a hybrid 3D filter 180 having refracting portions for refracting light generated from the liquid crystal panel in the 3D mode and blocking portions for blocking the light. have. The hybrid 3D filter 180 is a structure in which a switchable barrier filter and a liquid crystal lens filter are mixed.

The hybrid 3D filter 180 determines the number of the first lenses LW1 according to the number signal of the viewer and determines the positions of the transmissive portions TA and the blocking portions NTA, The refractive index of the lenses LW1 is changed.

The positions of the transmissive portions TA and the blocking portions NTA are varied according to the number signal of the viewer, so that the hybrid 3D filter 180 prevents crosstalk between images emitted through the first lenses LW1. Here, the blocking units NTA block the image displayed on the liquid crystal panel or drive to display black by itself.

The hybrid 3D filter 180 includes a first film 31, a first front electrode 36 formed on the upper surface of the first film 31, a second front electrode 36 formed on the upper surface of the first film 31, The first division electrodes 34 formed on the lower surface of the second film 32 and the liquid crystal layer 35 positioned between the first film 31 and the second film 32, Second split electrodes 44 formed on the upper surface of the second film 32, a third film 42 spaced apart from the second film 32 and a second split electrode 44 formed on the lower surface of the third film 42, The second front electrode 46 and the liquid crystal lens layer 45 positioned between the second film 32 and the third film 42.

In the hybrid 3D filter 180 described above, the positions of the transmissive portions TA and the blocking portions NTA are determined by the voltages applied to the first divided electrodes 34. The first lenses LW1 of the type shown in FIG. 9A are formed by the voltages applied to the second split electrodes 44 or the second lenses LW1 of the shape of FIG. 9B LW2 are formed.

On the other hand, in the third embodiment, only the first to third films 31, 32, and 42 are used for simplifying the process of reducing the number of films. However, this may be composed of two sheets of film sandwiched by the liquid crystal layer 35 and two sheets of film sandwiched between the liquid crystal lens layers 45, or a total of four sheets of film. In the third embodiment, the first or second divided electrodes 34 and 44 are formed on one surface of a specific film. However, it may be displaced so as to be located on the film on each facing surface. In the present invention, only the method of setting by the user input unit is exemplified, but it can also be realized by the automatic setting function by the camera or the sensor.

The present invention supports the maximum resolution according to the number of actual viewers by applying a variable resolution according to the number of actual viewers and adjusts the resolution of the stereoscopic image and the display quality of the stereoscopic image Eye multi-view stereoscopic image display device capable of improving a stereoscopic-vision-free multi-view stereoscopic image display device.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be practiced. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. In addition, the scope of the present invention is indicated by the following claims rather than the detailed description. Also, all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

110: Gate driver 120: Data driver
130: 3D filter driver 140: timing controller
150: Multi-view image conversion unit 160: Host system
170: view signal generator 180: 3D filter
190: user input unit 31: first film
34: split electrodes 36: front electrode
32: Second film TA: Transmission parts
NTA: Blockers

Claims (12)

A display panel for displaying the 2D image in the 2D mode and displaying the multi-view image in the 3D mode;
A 3D filter including a switchable barrier filter having light blocking portions for passing light generated from the display panel in the 2D mode and blocking light transmitted through the display panel in the 3D mode;
A user input unit for receiving the number of viewers and the position of the viewer from the user in the 3D mode;
A view signal generating unit for generating a number signal of a viewer according to the number of viewers input from the user input unit and a position signal of a viewer according to the position of the viewer;
A multi-view image converter for outputting the input image data in the 2D mode, and converting the resolution of the image data into multi-view image data according to the number signal of the viewer in the 3D mode; And
And a 3D filter driver for supplying a driving voltage for controlling the 3D filter according to the number of the viewers and the position signal of the viewer in the 3D mode,
In the 3D filter, the number of the transparent portions and the blocking portions is determined according to the number signal of the viewer, the positions of the transparent portions and blocking portions are varied according to the position signal of the viewer, and when the number of viewers increases, And the width of the blocking portions also increases, and when the number of the viewers decreases, the widths of the transparent portions and the blocking portions also decrease. The method according to claim 1,
The multi-view image conversion unit
And reconstructs the view map of the image data according to the number signal of the viewer to convert the single view resolution to the full resolution / number of viewers. The method according to claim 1,
The 3D filter driver
A lookup table storing drive voltage data classified by the number of viewers and the position signal of the viewer,
A driving voltage control unit for reading driving voltage data stored in the lookup table corresponding to the number of viewers and a position signal of a viewer,
And a driving voltage supply unit that uses the driving voltage data read by the driving voltage control unit to vary the driving voltage to be supplied to the 3D filter. delete delete delete A display panel for displaying the 2D image in the 2D mode and displaying the multi-view image in the 3D mode;
A 3D filter comprising a liquid crystal lens filter having lenses for passing light generated from the display panel in the 2D mode and refracting light generated from the display panel in the 3D mode;
A user input unit for receiving the number of viewers and the position of the viewer from the user in the 3D mode;
A view signal generating unit for generating a number signal of a viewer according to the number of viewers input from the user input unit and a position signal of a viewer according to the position of the viewer;
A multi-view image converter for outputting the input image data in the 2D mode, and converting the resolution of the image data into multi-view image data according to the number signal of the viewer in the 3D mode; And
And a 3D filter driver for supplying a driving voltage for controlling the 3D filter according to the number of the viewers and the position signal of the viewer in the 3D mode,
Wherein the 3D filter determines the number of lenses according to the number signal of the viewer and changes the refractive index of the lenses according to the position signal of the viewer and increases the size of the lenses when the number of viewers increases, Wherein the size of the lenses is also reduced when the number of lenses is reduced. The method according to claim 1,
The 3D filter
A first film,
A first linear polarizer formed on a lower surface of the first film,
Split electrodes formed on an upper surface of the first film,
A second film spaced apart from the first film,
A second linear polarizer formed on an upper surface of the second film,
A front electrode formed on a lower surface of the second film,
And a liquid crystal layer disposed between the first film and the second film. 8. The method of claim 7,
The 3D filter
A first film,
Split electrodes formed on an upper surface of the first film,
A second film spaced apart from the first film,
A front electrode formed on a lower surface of the second film,
And a liquid crystal lens layer positioned between the first film and the second film. delete A display panel for displaying the 2D image in the 2D mode and displaying the multi-view image in the 3D mode;
A 3D filter for passing light generated from the display panel in the 2D mode, interrupting portions for blocking light transmitted through the display panel in the 3D mode, and lenses for refracting light emitted from the transmissive portions; ;
A user input unit for receiving the number of viewers and the position of the viewer from the user in the 3D mode;
A view signal generating unit for generating a number signal of a viewer according to the number of viewers input from the user input unit and a position signal of a viewer according to the position of the viewer;
A multi-view image converter for outputting the input image data in the 2D mode, and converting the resolution of the image data into multi-view image data according to the number signal of the viewer in the 3D mode; And
And a 3D filter driver for supplying a driving voltage for controlling the 3D filter according to the number of the viewers and the position signal of the viewer in the 3D mode,
Wherein the number of the transmissive portions, the blocking portions, and the number of lenses is determined according to the number signal of the viewer, the position of the transmissive portions and the blocking portions and the refractive index of the lenses are varied according to a position signal of the viewer, As the number of viewers increases, the size of the lenses increases as well as the widths of the transmissive portions and the blocking portions. When the number of viewers decreases, the width of the transmissive portions and the blocking portions decreases along with the size of the lenses. Stereoscopic image display device. 12. The method of claim 11,
The 3D filter
A first film,
A first front electrode formed on an upper surface of the first film,
A second film spaced apart from the first film,
First split electrodes formed on a lower surface of the second film,
A liquid crystal layer disposed between the first film and the second film,
Second split electrodes formed on an upper surface of the second film,
A third film spaced apart from the second film,
A second front electrode formed on a lower surface of the third film,
And a liquid crystal lens layer positioned between the second film and the third film.

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