KR20120047011A - Stereographic display and eletronic device thereof - Google Patents

Abstract

PURPOSE: A stereographic image display device and an electronic device with the same are provided to stereographically displaying a main screen and a sub screen on the entire display screen. CONSTITUTION: A polarization light modulation panel(240) arranges liquid crystal molecules in a first direction and a third direction during (n+2) frame to display the entire image. The third direction is different from the first direction. The polarization light modulation panel arranges liquid crystal molecules in a fourth direction during (n+3) frame to make light have a fourth polarization light state. The fourth direction is different from the first direction, the second direction, and the third direction.

Description

STEREOGRAPHIC DISPLAY AND ELETRONIC DEVICE THEREOF}

The present specification discloses a stereoscopic image display device and an electronic device including the same.

In general, a liquid crystal display device is composed of two opposite electrodes and a liquid crystal layer formed therebetween. The liquid crystal molecules of the liquid crystal layer are driven by an electric field generated by applying a voltage to the two electrodes. Liquid crystal molecules have polarization property and optical anisotropy. Polarization property means that when liquid crystal molecules are placed in an electric field, charges in the liquid crystal molecules are attracted to both sides of the liquid crystal molecules, and the direction of molecular arrangement changes according to the electric field. Refers to changing the path or polarization state of the emitted light differently according to the incident direction or the polarization state of the incident light due to the elongated structure of the liquid crystal molecules and the aforementioned molecular arrangement direction.

Accordingly, the liquid crystal layer may exhibit a difference in transmittance due to voltages applied to the two electrodes, and display the 2D image by changing the difference for each pixel.

Meanwhile, in recent years, liquid crystal display devices capable of three-dimensional display have been developed in response to increasing user demand for liquid crystal display devices capable of displaying a more realistic image having three-dimensional properties.

In general, stereoscopic images expressing 3D are made by the principle of stereo vision through two eyes, using the parallax of two eyes, that is, binocular disparity which appears because the eyes are about 65 mm apart. A liquid crystal display device capable of displaying a stereoscopic image has been proposed.

In more detail, 3D implementations show that the left and right eyes looking at the liquid crystal display see different 2D images, and when these two images are transmitted through the retina to the brain, the brain correctly fuses them together to produce the original 3D image. Depth and realism are reproduced. This phenomenon is commonly referred to as stereography.

Techniques for displaying 3D stereoscopic images in a device having a 2D screen display such as a liquid crystal display device include a stereoscopic image display by a special glasses, an autostereoscopic stereoscopic display, and a holographic display method.

The three-dimensional image display method using special glasses transmits polarized glasses using polarization vibration or rotation direction, time-divided glasses and alternating left and right images, and light of different brightness in left and right. It can be divided into concentration difference method.

In addition, the autostereoscopic 3D display method has a parallax barrier method that allows the user to separate and observe the image through a vertical grid-shaped aperture in front of each image corresponding to the left and right eyes, and a semi-cylindrical type. The lens may be divided into a lenticular method using a lenticular plate having a stripe arrangement of a cylindrical lens and an integral photography method using a lens plate shaped like a fly's eye.

The present specification provides an image display device capable of displaying a main screen and a sub-screen in three dimensions on an entire display screen, and an electronic device including the same.

According to an embodiment, an image display device and an electronic device including the same may display a main screen and a sub screen in three dimensions on the entire display screen.

1 is a diagram illustrating that a main screen and a sub-screen are formed by screen division.
2 to 4 are diagrams of a stereoscopic image display device according to embodiments.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Recently, it has become common for a display device to have a picture in picture (PIP) function in which two or more pieces of image information are displayed on one screen. Since the PIP function displays two different images with one display device, the user can watch different broadcasts, and thus has a great response.

However, the PIP function of the display device is divided into a main screen and a sub-screen because it is performed by screen division as shown in FIG. 1, and a user viewing through the main screen can be viewed on a large screen while sub-screen. Since the user watching the image is displayed in a smaller area than the main screen, the user is less satisfied with the image viewing than the user viewing the main screen.

In addition, even for a user who views the main screen in the display device having the PIP function, the main screen is not displayed on the front of the display device, and an unwanted image is not displayed for some areas of the display area, that is, the part displaying the sub screen. As it is displayed, it is difficult to watch immersive.

In addition, when a user wants to view private data by connecting a personal computer instead of watching a broadcast, and other users around the user want to watch a broadcast, the conventional display device displays both a main screen and a sub-screen on one display area, thereby substantially privacy. In this case, since the protection is not made, the PIP function cannot be used.

The present inventors have long researched an image display device and an electronic device including the same that display the main screen and sub-screens on the entire display screen and simultaneously display the main screen and sub-screens on the entire display screen. Accordingly, as described below, an image display device and an electronic device including the same that display the main screen and sub-screen on the entire display screen and simultaneously display the main screen and sub-screen on the entire display screen are developed.

Referring to FIG. 2, the stereoscopic image display apparatus 200 according to an exemplary embodiment includes a liquid crystal display 210 and a polarization modulating panel 240. In addition, there are separate glasses 260 and 265 for selectively transmitting an image passing through the polarization modulation panel 240 from the liquid crystal display device 210 to watch the stereoscopic image display device 200.

First, the liquid crystal display 210 includes an array substrate 215, a color filter substrate 220, a liquid crystal layer interposed between the two substrates 215 and 220, and two substrates 215 and 220. Although not shown in the drawings, the first and second polarizers 225 and 230 attached to the respective outer surfaces may include a backlight unit (not shown) on the outer surface of the first polarizer 225.

The array substrate 215 is provided with gate and data lines crossing each other to define a plurality of pixel regions P, and thin film transistors Tr corresponding to the pixel regions P connected to the two wirings. It is connected to the thin film transistor Tr and may include a pixel electrode.

The color filter substrate 220 covers a color filter layer including a black matrix corresponding to the boundary of each pixel region P, a red, green, and blue color filter pattern corresponding to each pixel region P in sequence, and the color filter layer. A common electrode (not shown) is provided on the front side.

In this case, a common electrode (not shown) provided on the front surface of the color filter substrate 220 according to the mode of the liquid crystal display device 210 is alternately formed with the pixel electrode in each pixel region P of the array substrate 215. May be

Next, the polarization axes of the first and second polarizers 225 and 230 may perpendicularly cross each other.

Therefore, according to the configuration of the liquid crystal display device 210 described above, the first polarization angle, for example, 45 degrees is polarized from the pixel region P positioned in the odd pixel line of the n-th (odd) frame. Light is emitted from the pixel region P positioned in even-numbered pixel lines, and light is emitted in a second polarization angle, for example, 135 degrees. At this time, in the liquid crystal display device 210, the left eye main screen image signal incident to the left eye of the main screen glasses 260 is positioned on the even pixel lines with respect to the pixel area P positioned in the odd pixel line. In the pixel region P, a main screen image signal for the right eye that is incident on the right eye of the main screen glasses 260 is applied to form a display device for implementing a stereoscopic image on the main screen.

In addition, according to the configuration of the liquid crystal display device 210 described above, a third polarization angle, for example, 90 degrees, is polarized from the pixel region P positioned in the odd pixel line of the n + 1th (even) frame. The light in the turned-out state is emitted, and the light in the state polarized by the fourth polarization angle, for example, 180 degrees, is emitted from the pixel region P positioned in the even-numbered pixel line. In this case, in the liquid crystal display device 210, the left eye main screen image signal incident on the left eye of the sub-screen glasses 265 is positioned on the even-numbered pixel lines with respect to the pixel area P positioned in the odd-numbered pixel lines. In the pixel region P, a sub-screen image signal for the right eye incident to the right eye of the sub-screen glasses 265 is applied to form a display device that enables stereoscopic image implementation for the sub-screen.

Since the liquid crystal display 210 outputs a video signal to n + 2, n + 4, n + 6, etc. frames in the same manner as n frames, it is possible to implement a stereoscopic image for the main screen. Since the video signal is output to the frames such as +3, n + 5, n + 7 .... like the n + 1 frame, it is possible to implement a stereoscopic image for the sub-screen.

The polarization modulating panel 240 changes the polarization state of the light emitted from the liquid crystal display device 210, and is interposed between the first substrate (not shown) and the second substrate (not shown) and the two. It is composed of a liquid crystal layer (not shown), the first electrode (not shown) is provided on the inner surface of the first substrate (not shown), the second electrode (not shown) on the inner surface of the second substrate (not shown) ) May be included.

The polarization modulating panel 240 having such a configuration is tuned to an image signal applied to the liquid crystal display device 210 to adjust the voltages of the first and second electrodes (not shown). By adjusting the arrangement direction, the liquid crystal molecules are arranged in the first direction during n frames such that the image is displayed on the entire screen of the liquid crystal display device 210 so that light passing therethrough forms the first polarized state, and then the entire image. The liquid crystal molecules are arranged in a second direction different from the first direction during the n + 1 frame to display the light, and thus the light passing therethrough serves to achieve the second polarization state. Accordingly, the light having the first polarization state is finally emitted through the display screen for n frames, and the light having the second polarization state is emitted during the n + 1 frame.

Thus, the image liquid crystal display 210 and the polarization modulation panel 240 pass through the odd and even pixel lines of the main screen and the sub-screen as well as the sub-screen of the n-frame main screen and n + 1 frame. Since the polarization state of the light is different, the main screen and the sub-screen can be displayed on the entire display screen, and the main screen and the sub-screen can be displayed in three dimensions on the entire display screen. Therefore, when the user wears glasses 260 and 265 for selectively transmitting 3D images of light having different polarization states, the user can watch a full-size stereoscopic image of the main screen and the sub-screen on the entire display screen. .

In this case, only the left eye main screen image is incident through the left eye lens of the glasses 260 for stereoscopic image during n frames, and only the right eye main image is incident through the right eye lens. Meanwhile, during the n + 1 frame, only the left eye subscreen image is incident through the left eye lens of the glasses 265 for stereoscopic image, and only the right eye subscreen image is incident through the right eye lens.

In this case, since the unit frame time is several milliseconds (ms), the user may feel as if the image information is simultaneously input to the left eye and the right eye without any time difference, and the image information received by the left and right eyes is synthesized to make a 3D image. do.

Meanwhile, the image display apparatus 200 according to the exemplary embodiment with reference to FIG. 2 may view two different full-size granular images without degrading image quality.

In this case, the second and third sub-screens other than the main screen and the sub-screen, that is, three or more m different images may be selectively viewed by different users. In this case, each of the m different images emits light with different polarization states from the pixel region P positioned in the odd-numbered pixel lines and the even-numbered pixel lines.

Normally, the human eye does not feel blinking due to the cognitive limitation of the eye if 30 or more blinks are continuously made per second. As a result, the liquid crystal display 210 normally drives 60 Hz. 60Hz driving means that 60 times of image information is displayed on the screen per second, and each frame is 1/60 second. Therefore, in the case of the liquid crystal display device 210 driven at 60 Hz, when divided into the main screen and the sub-screen, 30 times of the main image and 30 times of the sub-screen are applied to the main screen and the sub-screen. Since the user wearing the glasses for each screen is applied 30 times per second to the main screen and the sub-screen, respectively, it is beyond the visual perception limit, so that the user can watch the image without feeling the display quality deterioration and flickering.

Reflecting this, when driving the liquid crystal display at 120 Hz, a total of four different image informations can be expressed in a range that does not feel flickering beyond the human visual perception ability. Accordingly, in this case, the image having four different polarization states can be made by periodically changing the polarization state of the polarization modulation panel to have the first to fourth polarization states in synchronization with driving of the liquid crystal display device. Four different images can be viewed at full size by different users by viewing glasses while wearing the first to fourth polarizing films to selectively transmit two polarization states.

Furthermore, by driving the liquid crystal display at 240 Hz and periodically changing the polarization state of the polarization modulation panel to have first to eighth polarization states, an image having eight different polarization states can be produced. If the user wears glasses with polarizing films that selectively transmit light having different polarization states, respectively, eight different images may be viewed by different users at full size.

By increasing the size of the driving Hz of the liquid crystal display device 210 and the number of different polarization states of the polarization modulation panel 240 according to this principle, the stereoscopic image display device 200 according to the above-described exemplary embodiment has n number of each other. Other images can be implemented and viewed without degrading display quality.

3A and 3B are exploded views of a stereoscopic image display device according to another exemplary embodiment.

3A and 3B, the stereoscopic image display apparatus 200 according to another embodiment is the same as the stereoscopic image display apparatus according to the above-described exemplary embodiment of the liquid crystal display device 210 and the polarization modulating panel 240. It includes.

The polarization modulation panel 240 is tuned to an image signal applied to the liquid crystal display device 210 to adjust the arrangement direction of the liquid crystal molecules in the liquid crystal layer (not shown) by controlling the voltage of the first and second electrodes (not shown). As a result, as shown in FIG. 3A, the liquid crystal molecules are arranged in a first direction during n frames for displaying an image on the entire screen of the liquid crystal display device 210 so that light passing therethrough forms a first polarized state. Next, the liquid crystal molecules are arranged in a second direction different from the first direction during the n + 1 frame for displaying the entire image so that the light passing through the second image is in the second polarization state.

As shown in FIG. 3B, the liquid crystal molecules are arranged in a third direction different from the first direction and the first direction during the n + 2 frame for displaying the next full image, so that light passing through the third polarization state is changed. And then the liquid crystal molecules are arranged in a fourth direction different from the first to third directions during n + 3 frames for displaying the entire image, thereby causing the light passing therethrough to achieve the fourth polarization state. . Accordingly, light having the first to fourth polarization states is emitted through the display screen during n to n + 3 frames.

In this case, the stereoscopic image display apparatus 200 receives a left eye main screen image for n frames, a left eye sub-screen image for n + 1 frames, a right eye main screen image for n + 2 frames, and a right eye for n + 3 frames. Since the sub-screen image is output, the main screen and the sub-screen can be displayed on the entire display screen, and the main screen and the sub-screen can be displayed in three dimensions on the entire display screen. Therefore, when the user wears glasses 260 and 265 for 3D image to selectively transmit light having the first to fourth polarization states during n to n + 3 frames, the user displays the main screen and the sub-screen. Full-size stereoscopic video can be watched altogether.

In this case, only the left eye main screen image is incident through the left eye lens of the glasses 260 for stereoscopic image during n frames, and the image is not incident on the right eye lens. Meanwhile, during the n + 1 frame, only the left eye sub-screen image is incident through the left eye lens of the glasses 265 for stereoscopic image, and the image is not incident to the right eye lens. During the n + 2 frame, only the main image for the right eye is incident through the right eye lens of the glasses 260 for stereoscopic image, and the image is not incident on the left eye lens. Meanwhile, during the n + 3 frame, only the right eye sub-screen image is incident through the right eye lens of the glasses 265 for stereoscopic image, and the image is not incident on the left eye lens.

Similar to the stereoscopic image device according to one embodiment, the stereoscopic image display device according to another embodiment includes two or more second and third sub-screens other than the main and sub-screens, that is, three or more m different images during two frames. Since the left eye image and the right eye image are output, m different images can be displayed as a stereoscopic image on the entire screen.

Therefore, in the case of the liquid crystal display device 210 driven at 60 Hz, when divided into the main screen and the sub-screen, 30 times of the main image and 30 times of the sub-screen are applied to the main screen and the sub-screen. Since the user wearing the glasses for each screen is applied 30 times per second to the main screen and the sub-screen, respectively, it is beyond the visual perception limit, so that the user can watch the image without feeling the display quality deterioration and flickering. In this case, in order to improve display quality, the liquid crystal display 210 driving at 120 Hz may be implemented by increasing the number of images applied in one second, for example, to 120 times.

4 is a perspective view of an electronic device including a stereoscopic image display device according to embodiments.

Referring to FIG. 4, the electronic device 300 including the stereoscopic image display apparatus according to the embodiments may be the stereoscopic image display apparatus according to the exemplary embodiment described with reference to FIG. 2 or the other described with reference to FIGS. 3A and 3B. The stereoscopic image display apparatus 200 according to the exemplary embodiment includes a wireless sound transmitting apparatus 310 and a speaker 320 for outputting sound or audio.

 The wireless sound transmitting apparatus 310 may wirelessly output a sound or a voice corresponding to each of the main screen and the sub-screen in synchronization with frames corresponding to the main screen and the sub-screen. For example, the wireless sound output device 310 may use a wireless communication network, for example, a sound or voice corresponding to each of the main screen and the sub-screen using Wi-Fi technology or Bluetooth, which has been standardized in the IEEE 802.11 series. You can output wirelessly. Users may select and listen to a sound corresponding to one of a screen, i.e., a main screen or a sub-screen, that the user wants to watch through a wireless acoustic receiver such as a corresponding headset.

Embodiments have been described above with reference to the drawings, but the present invention is not limited thereto.

Although the liquid crystal panel has been exemplarily described as the display panel of the stereoscopic display device in the above-described embodiment, the present invention is not limited thereto. In addition to the liquid crystal panel, the display panel may be a display panel of any form or technology to be developed in the future as well as a display panel currently used such as an organic light emitting device (OLED) or a plasma display panel (PDP).

In the above-described embodiment, the polarization modulating panel has been exemplarily described as polarization means for polarizing light output from the display panel, but the present invention is not limited thereto, and the polarization means for polarizing light output from a display panel of any form or technology. It includes. For example, the polarizing means may be developed in the future as well as the polarizing means currently used, such as a patterned retarder patterned so that a material having a change in phase internally in addition to the polarization modulation panel is alternated for each pixel region line. Or polarizing means of the technique.

In the above embodiment, the spectacles may also be spectacles having a shutter lens that synchronizes with driving of the liquid crystal display. All of these shutter glasses include a shutter lens that can function as a shutter that periodically transmits or blocks light, and includes a small wireless communication means (not shown) to enable wireless synchronization with the liquid crystal display device. It may be. The shutter lens may include, for example, a liquid crystal panel including a first substrate (not shown) and a second substrate (not shown) facing each other and a liquid crystal layer (not shown) interposed between the two substrates (not shown). . In this case, a first electrode (not shown) is formed on an inner side surface of the first substrate (not shown), and a second electrode (not shown) is formed on an inner side surface of the second substrate (not shown). By changing the state of the liquid crystal by the voltage difference applied to the second electrode (not shown), it selectively transmits or blocks the light emitted from the liquid crystal display.

In the above description, all elements constituting the embodiments of the present invention are described as being combined or operating in combination, but the present invention is not necessarily limited to the embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more.

In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be included, unless otherwise stated, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

Claims (1)

Liquid crystal display device; And
During n frames for displaying an image on the entire screen of the LCD, the liquid crystal molecules are arranged in a first direction so that light passing through is in a first polarized state, and then for n + 1 frames for displaying an entire image. The liquid crystal molecules are arranged in a second direction different from the first direction so that the light passing through is in a second polarized state, and then the first direction and the first direction during the n + 2 frame for displaying the entire image. Is arranged in a third direction different from the first to third directions during n + 3 frames in which the light passing through the liquid crystal molecules is arranged in another third direction so as to form a third polarization state, and then the entire image is displayed. It includes a polarization modulation panel which serves to arrange the liquid crystal molecules to pass the light passing through the fourth polarization state Object image display device.

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