KR101904353B1 - 3D image display device and method of driving the same - Google Patents

Abstract

The present invention relates to a stereoscopic image display apparatus, which includes an image panel for outputting a two-dimensional image composed of a left eye image and a right eye image, and a display unit provided on the image panel and including a plurality of first electrodes, A display panel including a generating device; A backlight for supplying light to the display panel; A time domain generation driver for sensing a relative motion and determining a degree of shift of the time domain generating means of the time domain generator and applying a first voltage or a second voltage to each of the plurality of first electrodes; And a lamp driver for adjusting the output voltage of the backlight in accordance with the degree of shift of the field-of-view generating means and outputting the adjusted output voltage.

Description

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

The present invention relates to a three-dimensional image display apparatus, and more particularly, to a three-dimensional image display apparatus and a driving method thereof.

2. Description of the Related Art [0002] With the development of an information society, demands for a display device for displaying images have been increasing in various forms. Recently, a liquid crystal display (LCD), a plasma display panel (PDP) Various flat display devices such as an organic light emitting diode (OLED) have been utilized.

Such a flat panel display device has recently provided a function of displaying a three-dimensional image.

Generally, stereoscopic images representing three dimensions are made by the principle of stereoscopic vision through two eyes. Specifically, since two eyes exist about 65mm apart, even if one image is seen, the left and right eyes see different images because of difference of positions of two eyes.

In other words, the left and right eyes see different two-dimensional images, two different two-dimensional images are transmitted to the brain, and the brain fuses these two images to reproduce the depth and realism of the original three-dimensional image.

As such a method for implementing a three-dimensional image, there are an eyeglass-type and a glasses-type.

In the non-eyeglass system, a view field generating device such as a parallax barrier or a lenticular lens is configured between a video panel representing an image and a viewer so that viewers can view different images on the left and right eyes.

In other words, a viewer can feel a three-dimensional stereoscopic image by constructing a view panel displaying a two-dimensional image in which a left eye image and a right eye image alternately extend in a vertical direction, and a viewing area generating device between the image panel and a viewer. Specifically, the left eye image emitted from the image panel reaches the left eye of the viewer while passing through the field of view generating apparatus, and the right eye image emitted from the image panel reaches the viewer's right eye while passing through the field of view generating apparatus.

In recent years, a moving barrier and a moving lens, in which a barrier and a lenticular lens are shifted, can be implemented according to motion of a viewer or a motion of a three-dimensional image display device, so that a viewer can feel a more realistic three- .

1 is a cross-sectional view schematically showing a view field generating apparatus of a three-dimensional image display apparatus using a general moving barrier system.

1, the field of view generating apparatus 32 includes a first substrate 33 and a second substrate 31 opposed to each other with a liquid crystal layer 35 interposed therebetween, And a second electrode 36 formed on a lower surface of the second substrate 31. The first electrode 30 may be formed on the first substrate 30,

Here, the first electrode 30 and the second electrode 36 are formed of transparent electrodes.

The first electrode 30 and the second electrode 36 receive a voltage from a voltage application unit (not shown).

Specifically, the plurality of first electrodes 30 are independently supplied with a voltage from a voltage application unit (not shown).

A voltage is independently applied to the plurality of first electrodes 30 to form slit and barrier regions 39b and 39a in the liquid crystal layer 35. In the barrier regions 39a among the plurality of first electrodes 30, A first voltage V1 of a high voltage is applied to the corresponding first electrode 30. On the other hand, a second voltage (V2) of a low voltage is applied to the first electrode (30) corresponding to the slit region (39b) of the plurality of first electrodes (30).

The voltage applied to the second electrode 36 is the same as the ground voltage or the phase voltage applied to the first electrode 30 corresponding to the slit region.

That is, the positions of the slit and barrier regions 39b and 39a are adjusted by adjusting the voltage applied to the plurality of first electrodes 30. [

However, the three-dimensional stereoscopic image display device of the general moving barrier type or the moving lenticular lens type has the following problems.

When the motion of the viewer or the movement of the 3D image display device, that is, the relative movement of the viewer and the 3D image display device, occurs, the first electrode 30 ) To change the positions of the barrier and slit regions 39a and 39b. At this time, as the first electrode 30 to which the first voltage V1 and the second voltage V2 are applied is changed, the position of the slit region 39b is shifted, and accordingly, It suddenly falls and flicker occurs.

2 will be further described. 2 is a graph showing a cause of a flicker phenomenon occurring when a slit region is shifted in a general three-dimensional image display apparatus.

First, the x-axis of the graph represents the position of the slit region as a relative value, and the y-axis represents the luminance of the image displayed on the image panel (not shown).

The brightness suddenly drops at a point of -3 in the middle of the path where the slit region moves from -4 to -2 position. In other words, in the slit region distance, a region in which the luminance suddenly drops at a point where the distance becomes about 1/2 of the moving distance occurs, and the viewer feels as a flicker phenomenon.

That is, in a general moving barrier system or an immobile lenticular lens system, a flicker phenomenon occurs as a barrier or a lens is shifted. In addition, there is a problem that image quality is deteriorated due to the flicker phenomenon.

It is an object of the present invention to provide a three-dimensional image display device and a driving method thereof that provide a clear image quality by improving a flicker phenomenon that occurs during barrier or lenticular lens shift.

According to an aspect of the present invention, there is provided an image display apparatus comprising: an image panel that emits a two-dimensional image composed of a left eye image and a right eye image; a plurality of first electrodes formed on the image panel, A display panel including a view field generating device for outputting a 3D image as a 3D image; A backlight for supplying light to the display panel; A time domain generation driver for sensing a relative motion and determining a degree of shift of the time domain generating means of the time domain generator and applying a first voltage or a second voltage to each of the plurality of first electrodes; And a lamp driver for adjusting the output voltage of the backlight in accordance with the degree of shift of the field-of-view generating means and outputting the adjusted output voltage.

The lamp driving unit may output the output voltage at one point out of the shifts corresponding to the degree of shift of the field-of-view generating unit, which is greater than the output voltage at the other of the shifts.

The one point is a point that is one half of the shift interval.

Wherein the field of view generation driving unit comprises: a motion sense unit for sensing the relative motion and generating a corresponding motion information signal; A shift determination unit for determining a shift degree of the field of view generation unit in response to the motion information signal; And a voltage applying unit for applying the first voltage or the second voltage to each of the plurality of first electrodes corresponding to the shift degree of the field-of-view generating unit.

The field production means of the field of view generation device is a parallax barrier or a lenticular lens.

An image panel for outputting a two-dimensional image composed of a left eye image and a right eye image, and a view field generating device formed on the image panel and including a plurality of first electrodes to output the two-dimensional image as a three-dimensional image A method of driving a three-dimensional image display apparatus, comprising: a display panel for driving a display panel; a backlight for supplying light to the display panel; and a lamp driver for outputting an output voltage to the backlight, Determining a degree of shift of the field-of-view generating means of the generating device, and applying a first voltage or a second voltage to each of the plurality of first electrodes; And adjusting the magnitude of the output voltage corresponding to the degree of shift of the field-of-view generating means and outputting the adjusted output voltage to the backlight.

The step of outputting the output voltage to the backlight may include outputting the output voltage at a point of the shift section corresponding to the degree of shift of the field of view generation section at a larger point than other points of the shift section.

The one point is a point that is one half of the shift interval.

Wherein the step of applying the first voltage or the second voltage to each of the plurality of first electrodes comprises the steps of sensing the relative motion and generating a corresponding motion information signal; Determining a degree of shift of the field of view generating means in response to the motion information signal; And applying the first voltage or the second voltage to each of the plurality of first electrodes corresponding to the degree of shift of the field-of-view generating means.

The three-dimensional image display apparatus according to the present invention has an effect of improving a flicker phenomenon occurring when a barrier or a lenticular lens is moved.

Accordingly, there is an effect of providing an improved image quality.

1 is a cross-sectional view schematically showing a view field generating apparatus of a general three-dimensional image display apparatus.
2 is a graph showing flicker phenomenon in a typical three-dimensional image display apparatus.
3 is a view schematically showing a three-dimensional image display apparatus according to an embodiment of the present invention.
4 is a cross-sectional view schematically showing a plan view of a display panel according to an embodiment of the present invention.
5 is a cross-sectional view of a display panel according to an embodiment of the present invention.
6 illustrates an example in which a voltage is applied to a shifted first electrode when motion occurs.
7 is a schematic view illustrating a method of applying an LED current according to an embodiment of the present invention.
8 is a graph showing an improvement in the flicker phenomenon of a three-dimensional image display device during LED current output according to an embodiment of the present invention.

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

3 is a schematic view illustrating a three-dimensional image display apparatus according to an embodiment of the present invention.

3, the three-dimensional image display apparatus 100 according to the embodiment of the present invention includes a display panel 200, a backlight 300, and a driver 600.

First, the backlight 400 serves to supply light to the display panel 200. As the light source of the backlight 400, a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), a light emitting diode (LED), or the like can be used. In an embodiment of the present invention, a light emitting diode (LED) may be used.

The display panel 200 may include a video panel 234 and a field of view generator 232.

The image panel 234 may include a cathode ray tube (CRT), a plasma display panel (PDP), a liquid crystal display panel, an organic light emitting diode panel, Etc. may be used.

In addition, the left panel image L and the right panel image R, which are two-dimensional images, are alternately displayed on the image panel 234 in units of rows. That is, the left eye image L and the right eye image R are alternately displayed in a line by line form. Specifically, for example, if the right eye image R is displayed on the odd-numbered column line of the image panel 234, the left-eye image L is displayed on the even-numbered column line.

The viewing area generating device 232 allows each of the left eye image L and the right eye image R emitted from the image panel 234 to be transmitted only to the left eye of the viewer and the right eye of the viewer, Dimensional stereoscopic images.

For example, a parallax barrier system or a lenticular lens system may be used as the field of view generating apparatus 232.

The parallax barrier system is a system that alternately arranges a stripe slit and a barrier in the vertical direction to selectively transmit the left eye image L and the right eye image R. Specifically, the left eye image L emitted from the image panel 234 passes through the slit of the parallax barrier to reach the left eye of the viewer, and the right eye image R emitted from the image panel 234 passes through the slit of the parallax barrier To reach the viewer's right eye. The viewer combines the left eye image (L) and the right eye image (R) that have reached the left eye and the right eye, respectively, to be recognized as a three-dimensional image.

In the lenticular lens system, a plurality of semicylindrical lenticular lenses are successively arranged in a stripe pattern oriented in the vertical direction to selectively refract the left eye image L and the right eye image R emitted from the image panel 234 Method. Specifically, the left eye image L emitted from the image panel 234 passes through the lenticular lens to reach the left eye of the viewer, the right eye image R emitted from the image panel 234 passes through the lenticular lens, Lt; / RTI > The viewer combines the left eye image (L) and the right eye image (R) that have reached the left eye and the right eye, respectively, to be recognized as a three-dimensional image.

That is, the view area generating device 232 may constitute view area generating means such as a barrier, a slit, or a lenticular lens to express a three-dimensional image.

Hereinafter, a parallax barrier system will be described as an example for convenience of explanation.

The barrier zone 239a and the slit 239b which are directed in the vertical direction are alternately repeatedly arranged in the field of view generating unit 232. [

At this time, the positions of the barrier 239a and the slit 239b are not fixed, but their positions can be changed corresponding to the movements of the viewer or the motion of the 3D image display device. Accordingly, the viewer can stably appreciate the three-dimensional stereoscopic image. This will be described later in more detail.

Hereinafter, the display device 100 according to the embodiment of the present invention will be described in more detail with reference to FIGS. 4 and 5. FIG.

FIG. 4 is a schematic plan view of a display panel 200 according to an embodiment of the present invention, and FIG. 5 is a view schematically showing a cross-sectional view of a display panel 200 according to an embodiment of the present invention.

4, the display device 200 includes a video panel 234 for simultaneously displaying the left eye image L and the right eye image R, and a display panel 234 disposed between the video panel 234 and the viewer E And a field-of-view generating device 232.

The left eye image L and the right eye image R are alternately displayed on the image panel 234.

The field of view generator 232 alternately arranges the barrier 239a and the slit 239b having width ratios of M and Q to selectively transmit the left eye image L and the right eye image R.

Specifically, the left eye image L emitted from the image panel 234 passes through the slit 239b of the field of view generator 232 to reach the left eye EL of the viewer, and the right eye image (R) passes through the slit 239b of the parallax barrier and reaches the viewer's right eye (ER).

The right eye image R emitted from the image panel 234 passes through the slit 239b and reaches the right eye ER of the viewer E as an example of the right eye image R. More specifically, The right eye image R is blocked by the barrier 239a and does not reach the left eye EL of the viewer E. [

The barrier 239a and the slit 239b of the field of view generating apparatus 232 are divided according to the voltage applied to the plurality of first electrodes (230 in Fig. 5) formed below the barrier 239a and the slit 239b Loses. For example, a high voltage (230 in FIG. 5) may be applied to the electrode corresponding to the barrier 239a and a low voltage second voltage V2 may be applied to the electrode corresponding to the slit 239b have. This will be described later in more detail.

At this time, a voltage is independently applied to the plurality of first electrodes 230 (FIG. 5), and the barrier 239a and the slit 239b correspond to the voltages applied to the plurality of first electrodes 230 (FIG. 5) Is adjusted.

Thus, the position of the barrier 239a and the slit 239b can be adjusted. Thus, even if there is movement of the viewer E or movement of the 3D image display device 100 (see FIG. 3) You can enjoy the 2D image. In other words, the voltage applied to the plurality of first electrodes (230 in FIG. 5) is changed corresponding to the motion of the viewer, so that the positions of the barrier 239a and the slit 239b are changed, The right eye image R can be transmitted to the left eye EL of the viewer E and the right eye ER of the viewer E, respectively.

Hereinafter, this will be described in more detail with reference to FIG.

A field of view generator 232 is formed above a video panel 234 displaying a left eye image L and a right eye image R. [

The viewing zone generating device 232 includes a first substrate 233 and a second substrate 231 facing each other with a liquid crystal layer 235 interposed therebetween and a plurality of first electrodes 233 formed on the upper surface of the first substrate 233 230 and a second electrode 236 formed on the bottom surface of the second substrate 231. [

An insulating layer 237 may further be formed on the first electrodes 230.

An optical film such as a polarizing plate 238 may be further formed on the upper surface of the second substrate 231. This is because the light to be blocked by the barrier 239a formed in accordance with the application of the voltage between the first electrode 230 and the second electrode 231 of the field of view generator 232 is blocked completely to be.

The plurality of first electrodes 230 and the plurality of second electrodes 236 may be transparent electrodes.

The plurality of first electrodes 230 and the second electrodes 236 are supplied with a voltage from a voltage application unit (430 in FIG. 3) configured in the field-of-view generation driving unit (400 in FIG. 3).

Specifically, the plurality of first electrodes 230 are each independently supplied with a voltage from a voltage application unit (420 in FIG. 3).

For example, a voltage is independently applied to the plurality of first electrodes 230 to form a slit 239b and a barrier 239a. The barrier 239a corresponds to the area of the barrier 239a among the plurality of first electrodes 230 A first voltage (V1) of a high voltage is applied to the first electrode (230). On the other hand, a second voltage V2 of a low voltage is applied to the first electrode 230 corresponding to the slit 239b of the plurality of first electrodes 230. At this time, the low voltage may be, for example, the ground voltage or the contact pressure.

The voltage applied to the second electrode 236 is the same as the second voltage V2 applied to the first electrode 230 corresponding to the region of the slit 239b.

Here, the field-of-view generating device 232 varies whether the three-dimensional image is displayed in response to whether or not the voltage is applied to the first and second electrodes 230 and 236.

In other words, when no voltage is applied to the first and second electrodes 230 and 236, the slit 239b and the barrier 239a are not formed, Both of the left eye image L and the right eye image R arrive in both eyes of the viewer. Accordingly, the viewer can not sense the three-dimensional stereoscopic image and perceive the two-dimensional image. On the other hand, when a voltage is applied to the first electrode 230 and the second electrode 236, a slit 239b and a barrier 239a are formed, and the left eye image L passes through the slit 239b to reach only the left eye of the viewer, and the right eye image R passes through the slit 239b to reach the viewer's right eye only, so that the viewer feels the three-dimensional stereoscopic image.

Hereinafter, the positional change of the slit 239b and the barrier 239a in accordance with the motion of the viewer or the motion of the 3D image display device (hereinafter referred to as motion) will be described with reference to FIG.

Fig. 6 is a diagram showing, as an example, the slit 239b and the barrier 239a whose positions are changed in accordance with the movement.

First, it is assumed that the slit 239b and the barrier 239a shown in Fig. 5 represent the slit 239b and the barrier 239a when there is no movement, that is, in the normal position.

6, when a motion occurs, the first voltage V1 and the second voltage V2 correspond to the movement of the first electrode 230 shifted from the first electrodes 230 applied at the right position, (230).

5, the first voltage V1 is applied to the first, second, sixth, and seventh electrodes 230 of the plurality of first electrodes 230, , And the second voltage (V2) is applied to the fourth first electrode (230).

When a motion is generated, a first voltage (V1) and a second voltage (V2) are applied to the shifted first electrode (230) from the first electrode (230) (V2) is applied. For example, if the movement corresponds to the spacing of the two first electrodes 230 of the plurality of first electrodes 230, then the two first electrodes 230, rather than the first electrode 230 applied at the right position, The first voltage V1 and the second voltage V2 are applied to the first electrode 230 moved by the distance corresponding to the interval between the first electrode 230 and the second electrode 230, respectively. Accordingly, the first voltage V1 is applied to the third and fourth first electrodes 230 shifted by two from the first and second first electrodes 230 to which the first voltage V1 is applied, The first voltage V1 is applied. In addition, the second voltage V2 is applied to the fifth and sixth electrodes 230, which are moved two times from the first electrode 230 to which the second voltage V2 is applied. Although the first and second electrodes 230 are not shown in FIG. 5, the second voltage V2 applied to the two first electrodes 230 before the first and second electrodes 230, .

That is, the first and second voltages V1 and V2 are applied to the first electrode 230, which is moved by the degree of movement of the first electrode 230 applied in the fixed position, Make the video feel.

Hereinafter, the driving method of the three-dimensional image display apparatus according to the embodiment of the present invention will be described in more detail with reference to FIG.

First, the driving unit 600 may include a field-of-view generation driving unit 400 and a lamp driving unit 500.

Here, the field-of-view generation driving unit 400 senses the motion and determines the degree of shift of the first electrode (230 in FIG. 5) shifted from the fixed position, corresponding to the motion, The first voltage V1 and the second voltage V2 are applied to the gate electrode 230 of FIG. In addition, shift information including the degree of shift is transmitted to the lamp driver 500.

For this, the field-of-view generation driving unit 400 may include a motion sensor unit 410, a shift determination unit 420, and a voltage application unit 430.

The motion sensor 410 senses motion of the viewer or motion of the 3D image display device and transmits the motion information signal MFS to the shift determiner 420.

Here, the motion sensor unit 410 can detect a motion by configuring a motion recognition sensor such as a gyro sensor or eye tracking.

A motion recognition sensor is a sensor that recognizes the movement or position of an object. Geomagnetic sensors, acceleration sensors, and other various sensors, altimeter, gyro, etc., are integrated into one chip. Such motion recognition sensors can be utilized not only for compass, pedometer and navigation functions, but also for three-dimensional stereoscopic video game functions for location tracking and enjoying games as mobile phones move.

In other words, the motion recognition sensor detects the movement of the body and measures the angular velocity acting on the inertial system to determine the degree of movement of the body. In addition, it is possible to judge the three-dimensional motion, that is, the three-dimensional motion of the x, y, and z axes, rather than the two-dimensional motion.

The shift determination unit 420 receives the motion information signal MFS from the motion sensor unit 410 and determines the degree of shift of the first electrode (230 in FIG. 5) Signal SFS.

The shift determining unit 420 transmits the generated shift information signal SFS to the voltage applying unit 430 and the lamp driving unit 500. [

Specifically, when it is necessary to change the position of the slit 239b and the barrier 239a due to the occurrence of motion, the position of the slit 239b and the barrier 239a is shifted by a degree of movement larger than the position of the first electrodes (230 in FIG. 5) The first voltage V1 and the second voltage V2 must be applied to the first electrode 230 of FIG. 5, respectively. For example, if the movement corresponds to a distance of about two of the first electrodes (230 in FIG. 5), two first electrodes (230 in FIG. 5) are connected to the shifted first electrodes The first voltage V1 and the second voltage V2 are applied. Here, the shift information signal SFS is information on the degree of movement (degree of shift) of the first electrode (230 in FIG. 5).

The voltage application unit 430 receives the shift information signal SFS from the shift determination unit 420 and receives the first voltage V1 and the second voltage V2 ).

5 and 6), the first voltage V1 and the second voltage V2 corresponding to the shift information signal SFS are shifted from the first electrode 230 applied at the right position And the first electrode 230, respectively. For example, if the shift information signal SFS corresponds to movement of two first electrodes 230 of the plurality of first electrodes 230, The first voltage V1 and the second voltage V2 are applied to the first electrode 230 to which the first electrode 230 is shifted. More specifically, for example, when the first voltage (V1) is applied to the first and second first electrodes (230 in FIG. 5) in the correct position, two first The first voltage V1 is applied to the third and fourth first electrodes 230 to which the electrode 230 has been moved.

That is, the voltage applying unit 430 shifts a plurality of first electrodes (230 in FIG. 5) corresponding to the shift information signal SFS and applies the first voltage (230 in FIG. 5) to the shifted first electrode V1 and the second voltage V2.

The lamp driver 500 receives the direct current voltage Vin and converts the direct current voltage Vin into an output voltage Vout which is a bias voltage for driving the backlight 300, that is, the LED, and supplies the output voltage Vout to the backlight 300.

At this time, the lamp driver 500 receives the shift information signal SFS from the shift determiner 420 of the field-of-view generating driver 400 and receives the output voltage Vout applied to the backlight 300 Current). Here, the current flowing through the LED is proportional to, for example, the output voltage Vout.

The lamp driving unit outputs an output voltage that is larger than another point in the shift period at one point in the shift period corresponding to the degree of shift of the plurality of first electrodes.

For example, the output voltage Vout at a point corresponding to about half of the shift section corresponding to the shift information signal SFS is made larger than the output voltage Vout of the other shift section.

Here, the shift period can be calculated corresponding to the shift degree of the plurality of first electrodes 230. (The number of the first electrodes 230 to be shifted / the total number of the first electrodes 230 to which the first voltage V1 or the second voltage V2 is applied) ).

An example will be described in more detail with reference to Figs. 7 and 8. Fig.

FIG. 7 illustrates a method of applying a backlight output voltage according to an exemplary embodiment of the present invention, and FIG. 8 illustrates flicker improvement when an output voltage is applied to a backlight according to an exemplary embodiment of the present invention.

First, there are four pictures in FIG. 7, and each picture shows the current applied to the LED according to the position of the 3D device.

In the first figure (1), the 3D device (3D device) has an angle of about -3.8 degrees with respect to the horizontal direction. In the second figure (2), the 3D device (3), the 3D device has an angle of about -3.0 degrees with respect to the horizontal direction, and the fourth image (4) has an angle of about -3.4 degrees with respect to the horizontal direction, The image display device (3D Device) forms an angle of about -2.5 degrees with respect to the horizontal direction. Here, an example is shown in which a 3D image display device (3D device) moves during a movement.

At this time, as the 3D device moves slowly, the first voltage V1 and the second voltage V2 applied to the plurality of first electrodes 230 are applied to the shifted first electrode 230 .

Specifically, for example, in FIGS. 1 and 2, the second voltage V2 is applied to the first and second first electrodes 230 from the left side, the third to seventh first electrodes 230, The first voltage V1 is applied to the eighth first electrode 230 and the second voltage V2 is applied to the eighth electrode 230. [ Accordingly, the third to seventh first electrodes 230 form a barrier region 239a. The first, second and eighth first electrodes 230 form a slit region 239b.

In this case, the second voltage V2 is applied to the first electrode 230 from the left in FIGS. 3 and 4, and the first voltage V1 is applied to the second to sixth electrodes 230, And the second voltage V2 is applied to the seventh and eighth first electrodes 230, respectively.

In other words, the first voltage (V1) and the second voltage (V2) applied to the eight first electrodes (230) according to the movement of the three-dimensional image display device (3D device) Is applied to the first electrode (230) shifted in the second electrode (230).

(2) shows the position of the first electrode 230 in the fixed position ((1)) and FIG. 4 shows the position of the first electrode 230 in the fixed position The first and second voltages V1 and V2 are applied to the first electrode 230, which is completely shifted in position.

Figure (3) is the point at half the moving interval.

At this time, the currents flowing through the LEDs in the figures (1) to (4) are larger than those in the other steps (1), (2) and (4) in the step (3)

Specifically, for example, the current flowing through the LEDs in FIGS. 1, 2, and 4 is about 20 mA, while the current flowing through the LED in FIG.

In other words, the output current of the LED is made larger than the other section at half of the shifted section.

Accordingly, a flicker phenomenon caused by shifting of the first electrode 230 can be improved.

8 will be further described. 8 is a graph showing an example in which the flicker phenomenon is improved when the output current (output voltage) flowing through the LED is raised according to the embodiment of the present invention.

First, the X axis of the graph represents the position at which the barrier is formed, and the Y axis represents the brightness of the display panel corresponding to the relative position of the slit.

Referring to the first graph (11), a slit area is formed at the -4th position (-4) in the fixed position, and a slit area is formed at the -4th position (-4) The slit area is shifted to the position (-2).

At this time, as the barrier moves, the brightness suddenly drops at the time (-3) which is about 1/2 of the period from the fixed point to the point of complete movement. At this time, the viewer visually feels a flicker phenomenon (screen flickering phenomenon) as the luminance of the display panel drops sharply.

In order to improve this, as shown in the second graph 22, the luminance difference can be reduced by supplying a larger current to the LED at the point (-3) which is about half of the moving interval. The luminance difference is LG1 when the LED current is equal to the other period, but LG2 is smaller than LG1 when the LED current is increased by?. That is, the luminance reduction caused by the shifting of the slit area is significantly reduced.

As described above, the LED current is made to be larger than other points at a point about half of the slit shift section, thereby improving the flicker phenomenon and providing an improved image quality.

It should be understood by those skilled in the art that the parallax barrier is described in the embodiment of the present invention, but it can also be used in a three-dimensional image display apparatus using a lenticular lens. In other words, a moving lens can be constructed by shifting a plurality of first electrodes of a lenticular lens and applying a high voltage and a low voltage, and in this case, the LED current or the backlight The flicker phenomenon can be improved.

The embodiment of the present invention described above is an example of the present invention, and variations are possible within the spirit of the present invention. Accordingly, the invention includes modifications of the invention within the scope of the appended claims and equivalents thereof.

200: display panel 232: field of view generator 234:
233: first substrate 231: second substrate 230: first electrode
236: second electrode V1: first voltage V2: second voltage
239a: barrier region 239b: slit region 235: liquid crystal layer
300: backlight 400: field-of-view generation driving unit 500: lamp driving unit
410: motion detection unit 420: shift determination unit 430: voltage application unit

Claims (9)

An image panel for outputting a two-dimensional image composed of a left eye image and a right eye image, and a view field generating device formed on the image panel and including a plurality of first electrodes to output the two-dimensional image as a three-dimensional image A display panel;
A backlight for supplying light to the display panel;
A field-of-view generating unit that detects a motion of a viewer or a 3D image display apparatus and determines a degree of shift of the field-of-view generating unit of the field-of-view generating apparatus and applies a first voltage or a second voltage to each of the plurality of first electrodes, Wow;
And a lamp driving unit for adjusting and outputting an output voltage corresponding to a degree of shift of the field-of-view generating unit in the backlight
A three - dimensional image display device.
The method according to claim 1,
The lamp driving unit includes:
Wherein the output voltage outputted to one point of the shift section corresponding to the degree of shift of the field-of-view generating section is larger than the output voltage outputted at another point of the shift section
A three - dimensional image display device.
3. The method of claim 2,
The one point is a point that is one half of the shift interval
A three - dimensional image display device.
The method according to claim 1,
The view area generation driver includes:
A motion sense unit for sensing motion of the viewer or the 3D image display device and generating a motion information signal corresponding thereto;
A shift determination unit for determining a shift degree of the field of view generation unit in response to the motion information signal;
And a voltage applying unit for applying the first voltage or the second voltage to each of the plurality of first electrodes corresponding to the degree of shift of the field-of-view generating unit
A three - dimensional image display device.
The method according to claim 1,
The field-of-view producing means of the field-of-view generating apparatus includes a parallax barrier or a lenticular lens
A three - dimensional image display device.
An image panel for outputting a two-dimensional image composed of a left eye image and a right eye image, and a view field generating device formed on the image panel and including a plurality of first electrodes to output the two-dimensional image as a three-dimensional image A method of driving a three-dimensional image display apparatus including a display panel, a backlight for supplying light to the display panel, and a lamp driver for outputting an output voltage to the backlight,
Detecting a motion of a viewer or a three-dimensional image display device and determining a degree of shift of the field-of-view generating means of the field-of-view generating device, and applying a first voltage or a second voltage to each of the plurality of first electrodes;
Adjusting the magnitude of the output voltage in response to the degree of shift of the field-of-view generating means and outputting the adjusted magnitude to the backlight
A method of driving a three-dimensional image display device.
The method according to claim 6,
Wherein the step of outputting the output voltage to the backlight comprises:
And outputting the output voltage greater than another point in the shift section at one point of the shift section corresponding to the degree of shift of the field-of-view generating section
A method of driving a three-dimensional image display device.
8. The method of claim 7,
The one point is a point that is one half of the shift interval
A method of driving a three-dimensional image display device.
The method according to claim 6,
Wherein the applying the first voltage or the second voltage to each of the plurality of first electrodes comprises:
Detecting a motion of the viewer or the 3D image display device and generating a corresponding motion information signal;
Determining a degree of shift of the field of view generating means in response to the motion information signal;
And applying the first voltage or the second voltage to each of the plurality of first electrodes corresponding to a shift degree of the field-of-view generating means
A method of driving a three-dimensional image display device.

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