KR20120056127A - Method of driving stereoscopic 3d display device - Google Patents

Abstract

PURPOSE: A method for driving a 3d image display device is provided to enable a user to watch a 3D image by non glass multiview point 3D. CONSTITUTION: When a user wants to watch a 3D image, a 3D image display device turns a parallax barrier on by controlling a switch(S121). The 3D image display device forms the 3D image. When another user of a specific location does not want to watch a different 3D image according to a location, the 3D image display device makes multiview 3D(S130). When another user wants to watch the different 3D image, the 3D image display device makes multichannel 3D(S140).

Description

Driving method of stereoscopic image display device {METHOD OF DRIVING STEREOSCOPIC 3D DISPLAY DEVICE}

The present invention relates to a driving method of a stereoscopic image display device, and more particularly, to a driving method of a stereoscopic image display device which can selectively implement a multi-view 3D and multi-channel 3D in an autostereoscopic method.

3D display is simply defined as "the whole system of artificially reproducing 3D screens."

Here, the system includes both software technology that can be viewed in 3D and hardware that actually implements the content created by the software technology in 3D. The reason for including the software domain is that the 3D display hardware requires a separate software content for each stereoscopic implementation.

In addition, the virtual 3D display allows a user to literally feel a three-dimensional effect on a flat display hardware by using a binocular disparity, which appears when the human eye is about 65 mm apart in a horizontal direction, among other factors. The totality of the system. In other words, even though our eyes look at the same thing because of binocular parallax, each one sees a slightly different image (exactly, it shares some of the left and right spatial information), and when these two images are passed through the retina to the brain, the brain sees them. By fusion of each other precisely, we can feel a three-dimensional feeling, and it is a virtual 3D display that creates a virtual three-dimensional effect through a design that displays two left and right images simultaneously and sends them to each eye using a 2D display device.

In order to display two channels of images on a single screen in such a virtual 3D display hardware device, in most cases, one channel is outputted one by one in a horizontal or vertical direction. When two channels of images are output from one display device at the same time, in the case of the autostereoscopic method, the right image is directly input into the right eye and the left image is only into the left eye. In addition, in the case of wearing glasses, the right image is hidden from the left eye and the left image is hidden from the right eye through special glasses for each type.

As such, the two-eye parallax due to the distance between the two eyes is the most important factor for the person to feel the three-dimensional feeling and depth, but besides, there is also a deep relation with the psychological and memory factors. Based on whether it is possible to provide a degree of three-dimensional image information, it is usually divided into a volumetric (volumetric type), three-dimensional representation (holographic type), stereoscopic representation (stereoscopic type).

The volume expression method is a method of allowing perspective to be felt in the depth direction by psychological factors and inhalation effects. It is a three-dimensional computer graphic that displays perspective, superposition, shading and contrast, and movement by calculation, or the viewing angle to an observer. It is applied to so-called IMAX movies that provide this wide screen and cause optical illusions that are sucked into the space.

The three-dimensional representation method known as the most complete stereoscopic image implementation technology can be represented by laser light reproduction holography or white light reproduction holography.

In addition, the stereoscopic expression method uses a physiological factor of both eyes to sense a three-dimensional effect. As described above, when the associated image of the plane including parallax information is visible in the left and right eyes of a human being about 65 mm apart, the brain In the process of fusing them, the spatial information before and after the display surface is generated and stereoscopic photography is used. Such stereoscopic expression methods include a method of wearing glasses and a glasses-free method of not wearing glasses.

Representative methods of not wearing glasses include a lenticular method and a parallax barrier method in which a lenticular lens plate in which cylindrical lenses are arranged vertically is installed in front of the display panel.

Hereinafter, a stereoscopic image display device of a general parallax barrier method will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exemplary view schematically showing a configuration of a stereoscopic image display apparatus using a general parallax barrier method.

As shown in the figure, a stereoscopic image display apparatus using a general parallax barrier method is provided on an image panel 40 and a front surface of the image panel 40 simultaneously displaying images for left and right eyes. It consists of the barrier cells 20 arrange | positioned.

In this case, the image panel 40 alternately defines a left eye pixel L for displaying a left eye image and a right eye pixel R for displaying a right eye image. The barrier cell 20 is disposed between the 40 and the user 30.

In the barrier cell 20, slits 22 are formed between thin barriers 21 called pararex barriers, and the left and right eye images are separated and displayed simultaneously through the barrier cell 20. Will be.

Accordingly, the left eye image displayed on the left eye pixel L of the image panel 40 reaches the left eye of the user 30 via the slit 22 of the barrier cell 20, and the image of the image panel 40 The right eye image displayed on the right eye pixel R reaches the right eye of the user 30 via the slit 22 of the barrier cell 20. In this case, the left and right eye images respectively detect a parallax (가능한) ) Is included, and the user 30 combines the two images to recognize the 3D image.

In this way, the Paralex Barrier system has the advantage of viewing without wearing glasses, while it is impossible to switch between 2D and 3D and displays only images for left and right binoculars. 3D resolution is reduced to 1/2 compared to 2D because 60Hz image panel displays left and right images separately.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a driving method of a stereoscopic image display device which can selectively implement 2D and 3D according to a user's selection.

Another object of the present invention is to provide a method of driving a stereoscopic image display device, which realizes autostereoscopic multiview 3D using a liquid crystal lens.

Another object of the present invention is to provide a driving method of a stereoscopic image display device which can selectively implement multi-view 3D and multi-channel 3D according to a user's selection.

Other objects and features of the present invention will be described in the configuration and claims of the invention described below.

In order to achieve the above object, a driving method of a stereoscopic image display device of the present invention comprises an image panel for emitting two-dimensional image data; And a parallax barrier disposed between the image panel and one or more viewers, the parallax barrier separating a left and right eye image, wherein the 2D and 3D are selectively implemented by operating a switch. step; And implementing multi-view 3D or multi-channel 3D according to a viewer's selection by processing image data input to the image panel when 3D is implemented. .

In this case, the image panel may be one of a liquid crystal display, an organic light emitting display, an electroluminescent display, a plasma image display, and an electroluminescent display.

The parallax barrier is characterized in that it comprises a liquid crystal lens having a lens function is driven in accordance with the voltage applied.

When the 3D image is not viewed, the parallax barrier is turned off by operating the switch.

When the 3D image is to be viewed, the parallax barrier is turned on by operating the switch.

The multi-view 3D is characterized by one viewer watching a 3D image at a plurality of specific positions.

The multi-channel 3D is characterized in that different viewers of a specific location watch different 3D images.

The parallax barrier creates a barrier area and an opening area so that images can be separated and viewed on both the left and right eyes to realize a 3D screen, and is designed as a multi-view so that one viewer can feel a three-dimensional feeling in various directions. It is done.

When a plurality of viewers want to watch different 3D images according to the position, it is characterized by switching to a multi-channel 3D mode by operating a switch.

The method may further include receiving two or more different 3D image data through the stereoscopic image display apparatus.

The method may further include receiving the first image and the second image transmitted at the same time or the first image and the second image transmitted separately.

For example, in the case of implementing the 4-view, the method may further include splitting and inputting 3D image data of the received first image and the second image into views 1, 2, and 3, 4.

And outputting the 4-view image to which the 3D image data of the first and second images different from each other is input to the image panel.

The method may further include separating the two different first images and the second images through the parallax barrier, and transmitting the two first images to the plurality of viewers.

As described above, the driving method of the stereoscopic image display apparatus according to the present invention selectively implements 2D and 3D by using a liquid crystal lens, and realizes the effect of viewing a stereoscopic 3D image by implementing auto glasses multiview 3D. to provide.

In the driving method of the stereoscopic image display device according to the present invention, different viewers of a specific location can watch different 3D images, and according to the user's selection, the multi-view 3D and multi-channel 3D can be selectively implemented to satisfy various needs of consumers. It provides an effect that can actively respond to.

1 is an exemplary view schematically showing a configuration of a stereoscopic image display apparatus by a general parallax barrier method.
2 is a diagram illustrating the principle of a multiview stereoscopic image display device by way of example.
3 is a flowchart sequentially illustrating a method of driving a stereoscopic image display device according to an exemplary embodiment of the present invention.
4 is a view showing an exemplary method of implementing a multiview 3D in a stereoscopic image display device according to an embodiment of the present invention.
5 illustrates an example of multi-view 3D implemented according to FIG. 4.
6 is a flowchart sequentially illustrating a method of driving multi-channel 3D in a stereoscopic image display device according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating an exemplary method of implementing multichannel 3D in a stereoscopic image display device according to an exemplary embodiment of the present invention. FIG.
8 illustrates an example of multi-channel 3D implemented according to FIG. 7.

Hereinafter, exemplary embodiments of a method of driving a stereoscopic image display device according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram exemplarily illustrating a principle of a multiview stereoscopic image display device.

In fact, 3D glasses type is a method in which the left eye and right eye images are received from the left eye and the right eye, respectively, at any position. That is, the image panel emits a left eye image and a right eye image in all directions and separates the left eye image and the right eye image through glasses.

The glasses-free method can be viewed in the same way as the glasses method if only one user is in a fixed position. Like the glasses, the left and right eye images can be sent to the left and right eyes of the user from the image panel itself. . However, this is commonly used for personal displays such as monitors or mobile phones and may not be seen in 3D depending on location.

However, several people, or moving 3D viewing artificially can not artificially separate the left eye image and right eye image. So we create what we call a view in a multi-view glasses-free way. That is, n views are created by combining two images of a left eye image and a right eye image.

Referring to FIG. 2, for example, when the viewer 130 sees V1 in the left and V2 in the right, the image viewed from the left feels relatively vivid, moves to the right, V6 in the left, and V7 in the right. When the position is reached, the image seen on the right becomes relatively vivid.

At this time, 3D is normally felt from views 1 to 8, but when the set of views is changed, for example, V8 is received at the left and V1 is received at the right. Usually one view is sized to 65mm, which is the human left and right eye distance. The more views, the wider the 3D field of view, but the lower the resolution.

For reference, the simplest binocular determines a viewpoint and arranges an image panel and a parallax barrier so that different images can be seen from the left eye and the right eye at that position. The image panel has a projection surface at a distance from the viewpoint to the image panel, and two perspective projection images each having a perspective center respectively in the left eye and the right eye are alternately arranged vertically for each column of pixels of the image panel. It is relatively easy to realize this, but it is hard to see in three dimensions other than a fixed position, and the visual area is very narrow, and when viewed from the position moved by the left and right eye distances, it is inverted, that is, the convex protrusion and the concave portion are reversed. The drawback is that you get a strange screen as you see it.

Accordingly, the polycular (multi-view) according to the present invention increases the number of parallaxes to about 4 to 8, thereby increasing the position normally visible. When the motion parallax, i.e., the observer moves in the horizontal direction and changes the viewing angle, the stereoscopic image display apparatus 100 can also view images from different angles.

In particular, the stereoscopic image display device according to an embodiment of the present invention is characterized by being able to implement both 2D mode and 3D mode by using a liquid crystal lens.

In the case of the conventional Paralex barrier method and lenticular lens, only 3D mode can be implemented, so it is impossible to switch to 2D. However, in the present invention, the voltage is controlled by forming the liquid crystal lens by changing the refractive index with the slope in the planar lens shape. Only the liquid crystal lens can be turned on and off, thereby realizing not only a 3D mode but also a 2D mode.

For reference, a general lens is to control the path of the incident light by position using the difference in refractive index between the material constituting the lens and the air. However, the liquid crystal layer may be configured to be driven by a different vertical electric field for each position by applying different voltages to positions of the liquid crystal layer without configuring the lens having such a physical shape. Then, incident light incident on the liquid crystal layer feels a different phase change for each position. As a result, the liquid crystal layer can control the path of the incident light like an actual lens. When the transmission of light is obtained as the light is transmitted through the lens by driving the liquid crystal by applying the vertical electric field as described above, the array structure including the liquid crystal and the electrodes for driving the liquid crystal is called a liquid crystal lens.

In addition, the stereoscopic image display apparatus according to an embodiment of the present invention implements a multi-view at the parallax barrier attached to the front of the image panel and processes the image data inserted into the image panel to view different 3D images of different viewers at a specific position The multi-view 3D and the multi-channel 3D can be selectively implemented according to a user's selection, which will be described in detail with reference to the accompanying drawings.

3 is a flowchart sequentially illustrating a method of driving a stereoscopic image display device according to an exemplary embodiment of the present invention.

First, a stereoscopic image display apparatus according to an embodiment of the present invention includes a parallax barrier that separates left and right eye images, an image panel positioned below the parallax barrier and outputting 2D image data, and an image panel positioned below the image panel. It may include a light source for transmitting light to the panel.

In this case, if the image panel is a device that emits light directly, the light source may be omitted.

For example, the image panel may be a direct type or a projection type liquid crystal display (LCD), an organic light emitting diode display (OLED), or a field emission display (FED). ), A flat panel display such as a plasma display panel (PDP), an electroluminescent display (EL), or the like may be used.

As the parallax barrier, a liquid crystal lens driven by applying a voltage and having a lens function may be used. The liquid crystal lens has a function of emitting a 2D image signal as a 3D image signal, such as a profile of a lens surface, and is positioned on an upper portion of the image panel that implements the 2D image, and selectively 3D according to whether voltage is applied. It emits a video signal or outputs a 2D video signal as it is. That is, by utilizing the characteristic that light is transmitted when no voltage is applied, it is possible to use a switching function such as two-dimensional display when no voltage is applied and 3D display when voltage is applied.

The stereoscopic image display apparatus according to the embodiment of the present invention configured as described above includes a switch for selectively implementing 2D and 3D, and when the 3D image is not viewed, the parallax barrier is turned off by operating the switch. 2D image is implemented by (S111, S112).

In addition, when the 3D image is to be viewed, the 3D image is realized by turning on the parallax barrier by operating the switch (S121 and S122).

In this case, as a multi-view 3D is implemented, one user may feel a three-dimensional effect at a plurality of specific positions (S130).

On the other hand, when different viewers of a specific location want to watch different 3D images, the multi-channel 3D can be realized by increasing the number of locations where stereoscopic feeling can be felt, and by viewing different 3D images by location through image processing. It is made (S140).

4 exemplarily illustrates a method of implementing multi-view 3D in a stereoscopic image display device according to an exemplary embodiment of the present invention, and illustrates a method of implementing 4-view.

5 is an exemplary view showing a multi-view 3D implemented in FIG. 4 as an example.

4 and 5, the stereoscopic image display apparatus 100 according to an exemplary embodiment of the present invention is a parallax barrier 120 that separates left and right eye images and a two-dimensional image positioned below the parallax barrier 120. It may include an image panel 140 for emitting image data and a light source (not shown) positioned under the image panel 140 to transmit light to the image panel 140.

In this case, if the image panel 140 directly emits light, the light source may be omitted.

In the image panel 140, first to fourth image pixels P1, P2, P3, and P4 respectively displaying the first to fourth image data 1, 2, 3, and 4 are sequentially arranged. In this case, the image panel 140 may be a flat panel display such as a liquid crystal display, an organic light emitting display, an electroluminescent display, a plasma image display, or an electroluminescent display.

The parallax barrier 120 creates a barrier area and an opening area so that the image 150 can be separated and viewed on both the left eye and the right eye, thereby realizing a 3D screen, and one viewer 130 can feel a three-dimensional effect in various directions. You can design it in multi-view so that That is, when the parallax barrier 120 is designed, the direction of light gathered at one vertex (2-view) is considered so that one viewer 130 may feel a three-dimensional feeling at several vertices (n-view) according to one vertex or design. In case of implementing the 4-view, four image data (1, 2, 3, 4) taken by a camera having four lenses is used. The first to fourth image pixels P1 and P2 of the image panel 140 are provided. , P3, P4).

In this case, the first image data 1 and the second image data 2, the second image data 2 and the third image data 3, the third image data 3 and the fourth image data 4, respectively. The combination of is to make the three-dimensional feeling in three directions by binocular parallax. That is, for example, the viewer 130C at the center position sees the 3D image 150C in which the second image data 2 and the third image data 3 viewed from the center of the image 150 are viewed from the center. The viewer 130L of the 3D image 150L combining the first image data 1 and the second image data 2 viewed from the left side of the image 150, and the viewer 130R of the right position of the image 150 The 3D image 150R combining the third image data 3 and the fourth image data 4 viewed from the left side can be viewed.

In this case, as described above, the parallax barrier 120 may be a liquid crystal lens driven by applying a voltage and having a lens function. The liquid crystal lens has a function of emitting a 2D image signal as a 3D image signal like a profile of a lens surface, and is located on an upper portion of the image panel implementing the 2D image, and selectively selects a 3D image signal according to whether voltage is applied. It emits or emits 2D video signals. That is, by utilizing the characteristic that light is transmitted when no voltage is applied, it is possible to use a switching function such as two-dimensional display when no voltage is applied and 3D display when voltage is applied.

In addition, since the lens system does not have a portion such as a barrier of the parallax barrier, there is no decrease in luminance due to switching between 2D and 3D.

In the multi-view 3D implementation, since one viewer can view only one vertex, it is impossible to cope with a viewing angle and multiple viewers, and the resolution is reduced by the number of views.

The principle of auto glasses-free 3D is to show different images in both eyes of a person at a specific location, so that the user can feel the three-dimensional effect by using it. When image processing is performed for viewing, different 3D images can be viewed by different people with one stereoscopic image display device. Hereinafter, a method of implementing the multichannel 3D will be described in detail with reference to the accompanying drawings.

6 is a flowchart sequentially illustrating a method of driving multichannel 3D in a stereoscopic image display device according to an exemplary embodiment of the present invention.

If multiple viewers want to watch different 3D images according to their location, the driver sees the map of the navigation, for example, the navigation of the car, while the seat of the passenger seats the digital multimedia broadcasting. DMB) or a stored movie, the user switches to the multi-channel 3D mode by operating a switch.

In this case, the stereoscopic image display device such as navigation receives two or more different 3D image data (S210). At this time, the first image taken by the camera lens of 1 and 2 and the second image taken by the camera lens of 3 and 4 are used. The image may be composed of different image data, and may receive the first image and the second image transmitted at once or the first image and the second image transmitted separately.

In this case, for example, when the 4-view is implemented, the 3D image data of the first image and the second image thus received are input to the views 1, 2, and 3, 4 (S220).

Then, the 4-view image in which the 3D image data of the first and second images different from each other is input is displayed on the image panel such as the liquid crystal panel of the navigation (S230).

In this case, a parallax barrier is attached to a front surface of the image panel, and two different first images and second images are separated through the parallax barriers, and each enters into the eyes of a driver and a driver's seat. You can enjoy (S240).

FIG. 7 is a diagram illustrating a method of implementing multi-channel 3D in the stereoscopic image display apparatus according to an exemplary embodiment of the present invention, in which two viewers watch the first image and the second image separately. For example.

FIG. 8 illustrates an example of multi-channel 3D implemented according to FIG. 7.

Referring to FIGS. 7 and 8, as described above, the stereoscopic image display apparatus 100 according to the embodiment of the present invention has a parallax barrier 120 separating the left and right eye images and a lower portion of the parallax barrier 120. And an image panel 140 positioned to emit 2D image data.

In the image panel 140, first to fourth image pixels P1, P2, P3, and P4 respectively displaying the first to fourth image data 1, 2, 3, and 4 are sequentially arranged. In this case, the image panel 140 may be a flat panel display such as a liquid crystal display, an organic light emitting display, an electroluminescent display, a plasma image display, or an electroluminescent display.

The parallax barrier 120 creates a barrier area and an opening area so that images can be viewed separately on both the left eye and the right eye to implement a 3D screen, while several viewers 230 ′ and 230 ″ are different from each other at different positions. Multiple channels can be designed to view other 3D images 250 '250 ". That is, for example, when the 4-view is implemented, the first image 250 'taken with the camera lenses of 1 and 2 and the second image 250 ″ taken with the camera lenses of 3 and 4 can be viewed at different specific positions. Image processing so that the first viewer 230 'in the left position sees the first image 250' taken with the camera lenses of the first and second, while the second viewer 230 "in the right position views the first image. Second images 250 "taken with 3 and 4 camera lenses can be viewed separately.

At this time, for example, when the stereoscopic image display apparatus 100 is a navigation of a vehicle, the driver views a map of the navigation, which is the first image 250 'while the viewer of the auxiliary seat views the second image 250 "through the navigation. Will be able to watch DMB or saved movies.

Many details are set forth in the foregoing description but should be construed as illustrative of preferred embodiments rather than to limit the scope of the invention. Therefore, the invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

100: stereoscopic image display device 120: parallax barrier
130,130L, 130C, 130R, 230,230 ', 230 ": viewer
140: image panel
150,150L, 150C, 150R, 250 ', 250 ": Video

Claims (14)

An image panel for emitting two-dimensional image data; And a parallax barrier disposed between the image panel and one or more viewers and separating left and right eye images.
Selectively implementing 2D and 3D by manipulating a switch; And
In the case of implementing 3D, processing the image data input to the image panel to implement multi-view 3D or multi-channel 3D according to a viewer's selection. Driving Method of Image Display Device The method of claim 1, wherein the image panel is one of a liquid crystal display, an organic light emitting display, an electroluminescent display, a plasma image display, and an electroluminescent display. The driving method of claim 1, wherein the parallax barrier comprises a liquid crystal lens driven according to voltage application and having a lens function. The method of claim 1, wherein when the 3D image is not viewed, the parallax barrier is turned off by operating the switch. The method of claim 1, wherein when the user wants to watch a 3D image, the parallax barrier is turned on by operating the switch. The method of claim 1, wherein the multiview 3D is a viewer viewing a 3D image at a plurality of specific positions. The method of claim 1, wherein the multi-channel 3D is a viewer of a different location to watch different 3D images. The method of claim 1, wherein the parallax barrier creates a barrier area and an opening area so that images can be separated and viewed on both the left and right eyes, thereby realizing a 3D screen, while allowing one viewer to feel a three-dimensional feeling in various directions. A driving method of a three-dimensional image display device, characterized in that the design with a dot. The driving method of claim 1, wherein when a plurality of viewers want to watch different 3D images according to their positions, the user switches to a multi-channel 3D mode by operating a switch. 10. The method of claim 9, further comprising receiving two or more different 3D image data through the stereoscopic image display apparatus. The method of claim 10, further comprising receiving the first image and the second image transmitted at the same time or the first image and the second image transmitted separately. . 12. The method of claim 11, further comprising, for example, inputting 3D image data of the received first image and the second image into views 1, 2, and 3, 4, respectively. A driving method of a three-dimensional image display device, characterized in that. The stereoscopic image display apparatus of claim 12, further comprising: outputting, to the image panel, a 4-view image in which 3D image data of different first and second images are input. Driving method. The driving method of claim 13, further comprising: separating and transmitting the two different first and second images to a plurality of viewers through the parallax barrier.

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