KR101659575B1 - Display apparatus for both 2D and 3D image and method of driving the same - Google Patents

Abstract

A two-dimensional three-dimensional image display device and a driving method thereof are disclosed.

The disclosed display apparatus is characterized in that the video signal input unit inputs a left eye image signal, a left eye image, a left eye image, at least one two-dimensional image signal, a right eye image signal and a right eye image signal to a display panel, Opens the left eye shutter of the shutter glass, opens the right eye shutter of the shutter glass in synchronization with the right eye image signal, and closes the shutter glass for the remaining image signals.

Description

[0001] The present invention relates to a two-dimensional three-dimensional image display apparatus and a method of driving the same,

The present invention relates to a two-dimensional combined three-dimensional image display apparatus and a driving method thereof.

Generally, three-dimensional images are made by the principle of stereoscopic vision through the two eyes of a person. Binocular parallax, which occurs because the eyes are separated by about 65mm, is the most important factor of the stereoscopic effect. The stereoscopic effect can be expressed by showing the same image as the actual image seen in each eye. To do this, the same two cameras are shot at a distance of two feet, then the left camera shows only the left eye, and the right camera only the right eye.

The stereoscopic image display device includes a display using glasses and a display without glasses. The glasses-type display includes a polarizing glasses system and a shutter glasses system. The glassesless system includes a parallax barrier system, a lenticular system, an integral imaging system, a holography system, Method.

Among the spectacle-type three-dimensional display system, the shutter glasses system realizes a stereoscopic image using glasses equipped with a liquid crystal shutter, that is, a liquid crystal shutter glass. The liquid crystal shutter glass system displays different images in the left eye and right eye during a frequency period of 60 Hz. A stereoscopic image display apparatus using a liquid crystal shutter glass system alternately displays a left image and a right image, and opens and closes the liquid crystal shutter alternately left and right synchronously with display of a left image and a right image.

In the spectacular three-dimensional display, the image is displayed only as a three-dimensional image so that a person who wears the shutter glass can feel a three-dimensional effect. However, since the image is displayed as a double image to a person who does not wear the shutter glass, .

According to an embodiment of the present invention, there is provided a two-dimensional three-dimensional image display apparatus including: a display panel on which an image is displayed; An image signal input unit for inputting the left eye image signal, the left eye image signal, the first two-dimensional image signal, the right eye image signal, and the right eye image signal to the display panel; A backlight unit for emitting light to the display panel; And a shutter control unit for opening the left eye shutter of the shutter glass synchronously with the left eye image signal, opening the right eye shutter of the shutter glass in synchronism with the right eye image signal, and closing the shutter glass for the remaining image signals .

According to another aspect of the present invention, a first gray-level image is displayed by mixing a first image formed by the left-eye image signal and a second image formed by the left-eye version image signal, The third image and the fourth image formed by the right-eye version video signal may be mixed to display the second gray-level image.

According to another aspect of the present invention, the video signal input unit may further input a second two-dimensional video signal after the version video signal of the right eye.

According to another aspect of the present invention, the video signal input unit may further input at least one black video signal.

According to another aspect of the present invention, the backlight unit may be divided into a plurality of blocks along the scanning direction of an image signal, and the light sources in the plurality of blocks may be sequentially turned on in a block unit.

According to another aspect of the present invention, the total lighting frequency of the backlight unit may be equal to the refresh rate of the display panel.

According to another aspect of the present invention, the first two-dimensional image signal may include an image signal having no disparity of a three-dimensional image formed by the left eye image signal and the right eye image signal.

According to another aspect of the present invention, the first two-dimensional image signal may include an image signal independent of the three-dimensional image formed by the left eye image signal and the right eye image signal.

A method of driving a two-dimensional three-dimensional image display apparatus according to an embodiment of the present invention includes sequentially driving a left eye image signal, a left eye image, a two-dimensional image signal, a right eye image signal, ; Irradiating the display panel with light by a backlight unit; Mixing a first image formed by the left eye image signal and a second image formed by a left eye version image signal; Displaying a two-dimensional image formed by the two-dimensional image signal; Mixing a third image formed by the right eye image signal with a fourth image formed by a right eye version image signal; And displaying the three-dimensional image by opening the shutter of the shutter glass in synchronization with the left eye image signal, opening the right eye shutter of the shutter glass in synchronization with the right eye image signal, and closing the shutter glass in synchronization with the remaining image signal ; ≪ / RTI >

The two-dimensional three-dimensional image display apparatus and the driving method thereof according to the embodiment of the present invention can simultaneously display a two-dimensional image and a three-dimensional image. A viewer wearing stereoscopic glasses can view a three-dimensional image, and a viewer who does not wear stereoscopic glasses can view a two-dimensional image.

Hereinafter, a two-dimensional three-dimensional image display apparatus and a driving method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view of a two-dimensional combined three-dimensional image display apparatus according to an embodiment of the present invention. A two-dimensional three-dimensional image display device according to an embodiment of the present invention includes a display panel 10 for displaying an image, a backlight unit 20 for irradiating the display panel 10 with light, 10) for inputting a video signal.

The display panel 10 may include, for example, a liquid crystal panel. The liquid crystal panel is provided with a thin film transistor and an electrode in units of pixels and modulates light emitted from the backlight unit 20 by applying an electric field to the liquid crystal in pixel units in accordance with a video signal input from the video signal input unit 25 Display the image.

The backlight unit 20 may include light emitting elements (see 22 in FIG. 4) and a backlight unit controller 28 for controlling the light emitting elements 22. The light emitting elements 22 may include, for example, a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED).

The image signal input unit 30 may include an inversion image signal for mixing a two-dimensional image signal, a three-dimensional image signal, and an image formed by the three-dimensional image signal to generate an image of a predetermined gray level. The 3D image signal may include, for example, a left eye image signal and a right eye image signal, and the inversion image signal may include a left eye version image signal and a right eye version image signal.

The display device according to the present invention can simultaneously view the three-dimensional image and the two-dimensional image. For example, a three-dimensional image can be viewed using the shutter glass 45, and a two-dimensional image can be viewed with the bare eye 50. The shutter control unit 40 opens the left eye shutter 45a of the shutter glass 45 and closes the right eye shutter 45b in synchronism with the left eye image signal so that the left eye shutter 45a of the shutter glass 45, The three-dimensional image can be displayed by closing the right eye shutter 45a and opening the right eye shutter 45b. On the other hand, a person who does not use the shutter glass 45 can view a two-dimensional image displayed by the two-dimensional image signal. At this time, the person who does not wear the shutter glass can not recognize the original data of the three-dimensional image by mixing the image by the three-dimensional image signal and the image by the three-dimensional version image signal. The inversion image may include a version that is a gray level of the image and / or color reversing. The gray level version may include, for example, a bright image being invisible to a dark image. Color reversing may include switching to a complementary color of the image color. For example, red may be reddish with green + blue, green with magenta (red + blue), and blue with red + green. If the in-progress image and the original image are consecutively viewed, the original image can not be recognized due to a predetermined gray level.

2, the image signal input unit 30 includes a left eye image signal L, a left eye image version signal L-inv, at least one two-dimensional image signal 2D, a right eye image signal R) and a right-eye version video signal (R-inv). The video signals may be input to the display panel 10 in synchronization with a vertical sync signal (Vertical Sync). The display panel 10 may include, for example, a 60 Hz or 50 Hz frame frequency. Here, the frame frequency may represent the speed of a cycle for displaying the three-dimensional image and the two-dimensional image together. For example, one three-dimensional image and two-dimensional image by the left eye image and the right eye image may be displayed for 1/60 seconds or 1/50 seconds. In FIG. 5, for example, a three-dimensional image, a first two-dimensional image, and a second two-dimensional image are displayed during one period. The second two-dimensional image may be the same as the first two-dimensional image. By displaying two 2D images repeatedly in one cycle, the quality of 2D images can be improved. Alternatively, the second two-dimensional image may be different from the first two-dimensional image, in which case the frame frequency of the two-dimensional image may be increased.

On the other hand, the rate at which each image signal input during one period is scanned on the display panel 10 can be expressed as a refresh rate. For example, if the display panel 10 has a frame frequency (or frame rate) of 60 Hz or 50 Hz, and the image signal is divided into a left eye image signal L, a left eye version image signal L- When each of the video signals includes a 2D video signal 2D, a right eye video signal R, a right eye version video signal R-inv, and a second 2D video signal 2D, . The frame rate and the refresh rate are not limited thereto, and can be variously changed in consideration of the texture of the image. Also, the order of inputting the respective video signals is not limited to that shown in Fig.

FIG. 3 shows that the backlight unit 20 and the shutter glass 45 are driven according to the respective image signals. When the left eye image signal L is inputted to the display panel 10, the backlight unit is totally switched on, the left eye shutter 45a of the shutter glass 45 is turned on and the right eye shutter 45b is turned off Lt; / RTI > For example, when the liquid crystal panel is used as the display panel 10, the liquid crystal operation time depends on the time taken for the liquid crystal to turn on according to the input signal, the rising time, the time for which the liquid crystal remains on, Polling time may be included. The backlight unit can supply light during a period in which the liquid crystal remains on. Therefore, the data signal is input, the backlight unit is turned off during the rising time, the backlight unit is turned on while the liquid crystal remains on, and the backlight unit can be turned off during the polling time. The backlight unit 20 can be controlled by the backlight unit control unit 35. [

Next, when the left-eye version video signal L-Inv is input to the display panel 10, the backlight unit is totally switched on and the left-eye shutter 45a and the right-eye shutter 45b of the shutter glass 45 are turned off And closed. When the two-dimensional image signal 2D is inputted to the display panel 10, the backlight unit is totally switched on and the left eye shutter 45a and the right eye shutter 45b of the shutter glass 45 are turned off and closed. When the right eye image signal R is input to the display panel 10, the backlight unit is totally switched on, the left eye shutter 45a of the shutter glass 45 is turned off and the right eye shutter 45b is turned on And is opened. When the right-eye version video signal (R-Inv) is input to the display panel 10, the backlight unit is totally switched on, and the left-eye and right-eye shutters of the shutter glass are turned off. When the last two-dimensional image signal 2D is inputted to the display panel 10, the backlight unit is totally switched on as described above, and the left-eye shutter 45a and the right-eye shutter 45b of the shutter glass 45 are turned off And closed.

The viewer can perceive each image displayed for one cycle of 1/60 seconds or 1/50 seconds, for example, as a mixed image without being able to independently distinguish the images. The viewer who wears the shutter glass 45 can view the stereoscopic image by allowing the left eye image to be separated from the left eye and the right eye image to be separated from the right eye according to the opening and closing of the shutter glass. I can not recognize the interruption of the video. The viewer who does not wear the shutter glass 45 can view the planar image in which the two-dimensional image is mixed on the background of the gray level generated by the mixture of the left eye image and the left eye image and the mixture of the right eye image and the right eye image have. Accordingly, the two-dimensional combined three-dimensional image display apparatus according to the present invention allows a two-dimensional image and a three-dimensional image to be simultaneously viewed. A viewer who does not wear the shutter glass can view the two-dimensional image without fatigue of the eyes. Therefore, when the user feels eye fatigue while watching a three-dimensional image by wearing a shutter glass for a long time, or when a two-dimensional image is desired to be viewed, the user can enjoy the image by taking off the shutter glass. In other words, it is possible to freely select two-dimensional image and three-dimensional image, and a plurality of viewers can enjoy two-dimensional image and three-dimensional image together with their choice.

The two-dimensional image signal may include an image signal having no disparity of the three-dimensional image formed by the left eye image signal and the right eye image signal. In this case, the same image can be viewed in three dimensions or two dimensions.

Alternatively, the two-dimensional image signal may include an image signal independent of the three-dimensional image formed by the left eye image signal and the right eye image signal. In this case, the three-dimensional image and the two-dimensional image are different, and two different channels can be viewed on one screen.

Next, the backlight unit is on-off driven as a whole, and the backlight unit is divided into a plurality of blocks, and the light sources in each block can be sequentially driven on a block-by-block basis. For example, the backlight unit may be driven to sequentially turn on by dividing the backlight unit into n blocks in the scanning direction of the display panel and synchronizing with the image addressing. The block of the backlight unit may represent an area for controlling the light sources included in each block together. For example, referring to FIG. 4, the backlight unit 20 includes a plurality of light sources 22, and first, second, and third backlight blocks 20a, 20b, and 20c, . ≪ / RTI > When the light sources in the backlight unit are turned on, the light sources in the first backlight block 20a are turned on, then the light sources in the second backlight block 20b are turned on, and then the light sources in the third backlight block 20c are turned on It can be lit up. Here, when the light sources of the second backlight block are turned on, the light sources of the first backlight block need not be turned off. The lighting hold time of the light sources in each block can be variously adjusted in consideration of the response speed of the display panel and the frame rate. By sequentially driving the light sources included in the plurality of backlight blocks, the time for supplying light to the display panel can be increased to brighten the brightness, and the crosstalk caused by the slow response speed of the display panel can be reduced.

5 illustrates an example of sequentially lighting the light sources in the first, second, and nth backlight blocks according to the input of a video signal.

6 is a block diagram illustrating a configuration of the video signal input unit 30 according to the first embodiment of the present invention. The video signal input unit 30 includes a black video signal Black, a left eye video signal L, a left eye version video signal L- Black, a right eye image signal, a right eye version image signal (R-Inv), and a two-dimensional image signal (2D). The driving method of the display device shown in FIG. 6 may further include a black image to reduce a crosstalk phenomenon that may occur due to a slow response speed of the liquid crystal panel. 6 is referred to as one frame, and each image screen included in one frame is referred to as a sub-image frame, the scanning rate corresponding to each sub-image frame is referred to as a refresh rate. For example, when the frequency of one frame is 60 Hz or 50 Hz and one frame includes eight sub-image frames, the refresh rate of each sub-image frame may be 480 Hz or 400 Hz.

7, in synchronization with the left eye image signal, the left eye shutter 45a of the shutter glass is opened, the right eye shutter 45b is closed, the left eye shutter 45a of the shutter glass is closed in synchronization with the right eye image signal , The right eye shutter 45b is opened, and the shutter glass is closed for the remaining video signals. Thus, a person wearing a shutter glass can view a three-dimensional image by a left eye image and a right eye image. A person who does not wear the shutter glass can view the first two-dimensional image on the screen background of the black and the gray level formed by the left eye image signal and the left eye image signal. Further, it is possible to view the second two-dimensional image on the screen background of the gray level formed by black, the right-eye image and the right-eye version video signal. The second two-dimensional image may be the same as the first two-dimensional image. By thus repeatedly displaying the same screen to increase the frame frequency of the two-dimensional image, the crosstalk can be reduced. The first two-dimensional image and the second two-dimensional image may include an image signal having no disparity of a three-dimensional image formed by the left eye image signal and the right eye image signal. Alternatively, the first and second two-dimensional image signals may include image signals independent of the three-dimensional image formed by the left eye image signal and the right eye image signal.

8, when one frame includes eight subframe images as shown in FIG. 7, the backlight unit is divided into n blocks, and the light sources (see 22 in FIG. 4) in each block are sequentially turned on How to do it. The backlight unit control unit 35 can control the lighting period and the light extinction period of the light sources in each block. Here, the total lighting frequency of the backlight unit may be equal to the refresh rate of the display panel.

A method of driving a two-dimensional three-dimensional image display apparatus (see FIG. 1) according to an embodiment of the present invention is a method of driving a two-dimensional three- And inputting a video signal to the display panel 10. The video signal input unit 30 may sequentially input the input left eye image signal, the left eye version image signal, the two-dimensional image signal, the right eye image signal, and the right eye version image signal to the display panel. And the display panel 10 is irradiated with light by the backlight unit 20. A first image formed by the left eye image signal and a second image formed by the left eye image are displayed, and a two-dimensional image formed by the two-dimensional image signal is displayed. A third image formed by the right eye image signal and a fourth image formed by the right eye image signal are displayed. A gray level image is displayed by mixing the first image and the second image, a gray level image is displayed by mixing the third image and the fourth image, and the naked eye 50 without the shutter glass 45 is displayed. A two-dimensional image can be displayed.

The left eye shutter 45a of the shutter glass 45 is opened in synchronization with the left eye image signal and the right eye shutter 45b of the shutter glass 45 is opened in synchronization with the right eye image signal, And the shutter glass is closed to display a three-dimensional image.

Meanwhile, a method of driving a two-dimensional three-dimensional image display apparatus according to embodiments of the present invention can be realized as a program that can be executed in a computer, and a method for operating the program using a computer- Can be implemented in a computer. The computer-readable recording medium may include, for example, a magnetic storage medium such as a ROM, a floppy disk, a hard disk, or an optical reading medium such as a CD-ROM or a DVD.

As described above, the two-dimensional combined three-dimensional image display apparatus and the driving method thereof according to the embodiment of the present invention enable simultaneous viewing of stereoscopic images and two-dimensional images. 2. Description of the Related Art In general, a two-dimensional three-dimensional image display device can display one of a stereoscopic image and a two-dimensional image in one display device and view it. In the present invention, a two- One person can view a three-dimensional image, and a naked eye can view a two-dimensional image. Therefore, many viewers can freely watch the two-dimensional image and the three-dimensional image simultaneously on one display device. Further, the two-dimensional image and the three-dimensional image can be displayed as independent images, and the two channels can be viewed on one screen.

The above-described embodiments are merely illustrative, and various modifications and equivalent other embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of protection of the present invention should be determined by the technical idea of the invention described in the following claims.

1 is a schematic view of a two-dimensional combined three-dimensional image display apparatus according to an embodiment of the present invention.

FIG. 2 illustrates an example of a video signal input to a two-dimensional three-dimensional image display device according to an exemplary embodiment of the present invention.

FIG. 3 shows an example of a method of driving a two-dimensional three-dimensional image display apparatus according to the image signal shown in FIG.

FIG. 4 schematically shows a backlight unit of the two-dimensional combined three-dimensional image display apparatus shown in FIG.

FIG. 5 shows another example of a method of driving a two-dimensional three-dimensional image display apparatus according to the image signal shown in FIG.

FIG. 6 illustrates another example of a video signal input to a two-dimensional three-dimensional image display device according to an embodiment of the present invention.

FIG. 7 shows an example of a method of driving a two-dimensional three-dimensional image display apparatus according to the image signal shown in FIG.

FIG. 8 shows another example of a method of driving a two-dimensional three-dimensional image display apparatus according to the image signal shown in FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

10 ... display panel, 20 ... backlight unit

30 ... video signal input unit, 35 ... backlight unit control unit

40 ... shutter control section

Claims (17)

A display panel on which an image is displayed; An image signal input unit for inputting the left eye image signal, the left eye image signal, the first two-dimensional image signal, the right eye image signal, and the right eye image signal to the display panel; A backlight unit for emitting light to the display panel; And a shutter control unit for opening the left eye shutter of the shutter glass synchronously with the left eye image signal and opening the right eye shutter of the shutter glass synchronously with the right eye image signal and closing the shutter glass for the remaining image signals, Wherein the display panel displays a first gray level image including a combination of a first image formed by the left eye image signal and a second image formed by the left eye image signal, Level video including a combination of a third image formed by the first gray-level image and a fourth image formed by the right-eye version video signal on the background of the first gray-level image and the second gray-level image, Dimensional image by the 2D image signal is displayed, Wherein the left-eye version image by the left-eye version image signal and the right-eye version image by the right eye version image signal each include a gray level version or color reversing of the image. delete The method according to claim 1, Wherein the video signal input unit further inputs a second two-dimensional video signal after the right-eye version video signal. The method according to claim 1, Wherein the video signal input unit further inputs at least one black video signal. 5. The method according to any one of claims 1 to 4, Wherein the backlight unit is divided into a plurality of blocks along a scanning direction of an image signal, and the light sources in the plurality of blocks are sequentially turned on in block units. 6. The method of claim 5, Wherein the total lighting frequency of the backlight unit is equal to the refresh rate of the display panel. 5. The method according to any one of claims 1 to 4, Wherein the first two-dimensional image signal includes an image signal having no disparity of a three-dimensional image formed by the left-eye image signal and the right-eye image signal. 5. The method according to any one of claims 1 to 4, Wherein the first two-dimensional image signal includes an image signal independent of the three-dimensional image formed by the left-eye image signal and the right-eye image signal. Inputting a left eye image signal, a left eye image signal, a first two-dimensional image signal, a right eye image signal, and a right eye image signal into a display panel sequentially; Irradiating the display panel with light by a backlight unit; Mixing a first image formed by the left eye image signal and a second image formed by a left eye version image signal; Displaying a two-dimensional image formed by the two-dimensional image signal; Mixing a third image formed by the right eye image signal with a fourth image formed by a right eye version image signal; And Opening a left eye shutter of the shutter glass in synchronization with the left eye image signal, opening the right eye shutter of the shutter glass in synchronization with the right eye image signal, and closing the shutter glass in synchronization with the remaining image signal to display a three- Lt; / RTI > Wherein the display panel displays a first gray level image including a combination of a first image formed by the left eye image signal and a second image formed by the left eye image signal, Level video including a combination of a third image formed by the first gray-level image and a fourth image formed by the right-eye version video signal on the background of the first gray-level image and the second gray-level image, Dimensional image by the 2D image signal is displayed, A left-eye version image by the left-eye version video signal and a right-eye version image by the right-eye version video signal are each a gray level version of the image or a driving method of a two- . delete 10. The method of claim 9, Further comprising the step of inputting a second two-dimensional image signal after the right-eye version video signal. 10. The method of claim 9, Further comprising the step of inputting at least one black image signal to the two-dimensional three-dimensional display device. 13. The method according to any one of claims 9 to 12, The step of irradiating the light includes: Dividing the backlight unit into a plurality of blocks along a scanning direction of an image; And And sequentially lighting the light sources in the plurality of blocks in a block unit. 13. The method according to any one of claims 9 to 12, Wherein the frame frequency of the display panel is 50 Hz or 60 Hz. 13. The method according to any one of claims 9 to 12, Wherein the first two-dimensional image signal includes an image signal having no disparity of a three-dimensional image formed by the left-eye image signal and the right-eye image signal. 13. The method according to any one of claims 9 to 12, Wherein the first two-dimensional image signal includes an image signal independent of the three-dimensional image formed by the left-eye image signal and the right-eye image signal. 13. The method according to any one of claims 9 to 12, Wherein the image signals are input according to a vertical synchronizing signal.

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