RU2464726C1 - Method and apparatus for displaying stereoscopic image - Google Patents

Method and apparatus for displaying stereoscopic image Download PDF

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Publication number
RU2464726C1
RU2464726C1 RU2011110073/07A RU2011110073A RU2464726C1 RU 2464726 C1 RU2464726 C1 RU 2464726C1 RU 2011110073/07 A RU2011110073/07 A RU 2011110073/07A RU 2011110073 A RU2011110073 A RU 2011110073A RU 2464726 C1 RU2464726 C1 RU 2464726C1
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RU
Russia
Prior art keywords
image
left eye
right eye
backlight device
images
Prior art date
Application number
RU2011110073/07A
Other languages
Russian (ru)
Inventor
Санг-Моо ПАРК (KR)
Санг-Моо ПАРК
Хо-Сеоп ЛИ (KR)
Хо-Сеоп ЛИ
Дзонг-Хоон ДЗУНГ (KR)
Дзонг-Хоон ДЗУНГ
Сергей ШЕСТАК (KR)
Сергей ШЕСТАК
Дае-Сик КИМ (KR)
Дае-Сик Ким
Original Assignee
Самсунг Электроникс Ко., Лтд.
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Priority to US9762508P priority Critical
Priority to US61/097,625 priority
Priority to KR10-2008-0110496 priority
Priority to KR20080110496 priority
Priority to US61/158,029 priority
Priority to KR10-2009-0037823 priority
Priority to KR1020090037823A priority patent/KR101362771B1/en
Application filed by Самсунг Электроникс Ко., Лтд. filed Critical Самсунг Электроникс Ко., Лтд.
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Publication of RU2464726C1 publication Critical patent/RU2464726C1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30Image reproducers
    • H04N13/398Synchronisation thereof; Control thereof
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406Control of illumination source
    • G09G3/342Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30Image reproducers
    • H04N13/302Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/31Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers
    • H04N13/315Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers the parallax barriers being time-variant
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30Image reproducers
    • H04N13/332Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/024Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/06Details of flat display driving waveforms
    • G09G2310/061Details of flat display driving waveforms for resetting or blanking

Abstract

FIELD: physics.
SUBSTANCE: method involves alternate generation of repeating images for the left eye and repeating images for the right eye; switching off the backlight device for a period of time, during which the left eye and right eye images are mixed, and switching on the backlight device for a period of time, during which only one of the left eye and right eye images is displayed; and controlling the shutter for the left eye and the shutter for the right eye in the 3D glasses for a period of time, during which the backlight device is on.
EFFECT: eliminating crosstalk in stereoscopic liquid crystal device using liquid crystal 3D glasses.
42 cl, 20 dwg

Description

Technical field

The methods and devices according to the present invention relate to reproducing a stereoscopic image and, more particularly, to a method and apparatus for reproducing a stereoscopic image capable of eliminating crosstalk created in a liquid crystal display device by using stereoscopic liquid crystal glasses.

State of the art

3D stereoscopic imaging technologies allow the viewer to feel the depth of the object using binocular parallax, and are classified as a stereoscopic method with glasses and an autostereoscopic method without glasses. In the stereoscopic method, the image is reproduced through the use of liquid crystal glasses, which reproduce different images for the left and right eyes of the viewer over a frequency period of 60 Hz. A device for reproducing a stereoscopic image using liquid crystal stereoscopic glasses alternately and quickly reproduces an image for the left eye and for the right eye and alternately opens / closes the shutter of the left eye and the shutter of the right eye in stereoscopic glasses.

Description of the invention

Technical problem

In a device for reproducing a stereoscopic image using liquid crystal stereoscopic glasses, however, crosstalk occurs due to the data retention characteristics of the LCD device, which results in the mixing of the image for the left eye and the image for the right eye in one frame. Such crosstalk is manifested in the fact that the device for reproducing a stereoscopic image reproduces distorted images for the left and right eyes of the viewer, thereby causing fatigue of the eyes of the viewer.

Technical solution

The present invention provides a method and apparatus for reproducing a stereoscopic image capable of eliminating crosstalk created in a stereoscopic LCD device using stereoscopic liquid crystal glasses.

Beneficial effects

In one exemplary embodiment, crosstalk is suppressed by adjusting the turn-on time and cycle of the backlight device, which provides background illumination of the LCD panel. The backlight is turned on every two frames through the use of “blind” (“black”) frames, and thus crosstalk between the image for the left eye and the image for the right eye can be minimized. It is also not necessary to minimize the turn-on time of the backlight in order to reduce crosstalk between images for the left eye and the right eye, and thus reducing the brightness can be minimized.

Description of drawings

The above and other aspects of the present invention may become more apparent from a detailed description of an example of its implementation with reference to the accompanying drawings, in which:

figure 1 is a schematic representation of a system for reproducing a stereoscopic image according to an embodiment of the present invention;

figure 2 is a block diagram of a liquid crystal stereoscopic glasses shown in figure 1;

figure 3 is a block diagram of a device for reproducing the stereoscopic image shown in figure 1, according to a variant implementation of the present invention;

4 is a block diagram of a device for reproducing the stereoscopic image shown in figure 1, according to another embodiment of the present invention;

5A is a timing chart illustrating the operation of the blink controller shown in FIG. 4 according to an embodiment of the present invention;

5B is a diagram illustrating a general operation of reproducing an image for the left eye and an image for the right eye on the LCD panel in each cycle according to an embodiment of the present invention;

6A-6F are timing diagrams illustrating an example of eliminating crosstalk between the image for the left eye and the image for the right eye in the stereoscopic image reproducing apparatus shown in FIG. 1, according to embodiments of the present invention;

7A and 7B are timing diagrams illustrating an example of a scan of the image for the left eye and the image for the right eye to be displayed on the LCD panel of the LCD TV with a frequency of 240 Hz, according to an embodiment of the present invention;

8A and 8B are timing charts illustrating an example of controlling a backlight device that provides backlighting of an LCD panel of an LCD TV with a frequency of 240 Hz, according to an embodiment of the present invention;

9A and 9B are timing charts illustrating an example of controlling a backlight device that provides illumination of an LCD panel of an LCD TV with a frequency of 240 Hz, according to another embodiment of the present invention;

10 is a flowchart of a stereoscopic image reproducing method according to an embodiment of the present invention; and

11 is a flowchart of a method for reproducing a stereoscopic image according to another embodiment of the present invention.

Best implementation

According to an aspect of the present invention, there is provided a method for reproducing a stereoscopic image, including alternately generating a repeating image for the left eye and a repeating image for the right eye; turning off the backlight device for a period during which the image for the left eye and the image for the right eye are mixed, and turning on the backlight device for the period during which only one of the images for the left eye and the right eye is reproduced; and opening / closing the shutter of the left eye and the shutter of the right eye in stereoscopic glasses for the period during which the backlight device is turned on.

Alternately generating repeating images for the left eye and for the right eye may include alternately generating at least one image for the left eye and at least one image for the right eye.

Alternately generating repeating images for the left eye and for the right eye may include alternately generating a set of an image for the left eye and a “blind” image and a set of images for the right eye and a “blind” image.

Turning on / off the backlight device may include controlling turning on / off the backlight device synchronously with a predetermined reference signal; turning off the backlight device for a period during which the first image for the left eye or the first image for the right eye is played; and turning on the backlight device for a period during which a second image for the left eye or a second image for the right eye is reproduced.

The period during which only the image for the left eye is reproduced may correspond to the period during which the first and second images for the left eye are mixed and the image for the left eye only is reproduced.

The period during which only the image for the right eye is reproduced may correspond to the period during which the first and second images for the right eye are mixed and only the image for the right eye is reproduced.

Opening / closing of stereoscopic glasses may include controlling the opening / closing of stereoscopic glasses in synchronization with a predetermined reference signal; opening the shutter of the left eye and closing the shutter of the right eye for a period during which repeating images for the left eye are reproduced; and opening the shutter of the right eye and closing the shutter of the left eye for a period during which repeating images for the right eye are reproduced.

Turning on / off the backlight device and opening / closing stereoscopic glasses may include controlling turning on / off the backlight device in accordance with a predetermined reference signal; and controlling the opening / closing of the stereoscopic glasses in accordance with a control signal for turning on / off the backlight device.

According to another aspect of the present invention, there is provided a device for reproducing a stereoscopic image, including an image processor alternately generating repeating images for the left eye and repeating images for the right eye; a timing controller (time synchronization controller) that extracts video pulses and a reference signal from the images for the left eye and the right eye generated by the image processor; and a blink controller that generates a control signal for the stereoscopic glasses in synchronization with the reference signal extracted by the timing controller, the blink controller turning off the backlight device for a period during which the image for the left eye and the image for the right eye are mixed, includes a backlight device for the period during which only one of the images for the left eye and for the right eye is reproduced, and opens / closes the shutter of the left eye and the shutter of the right eye in a stereoscope glasses for the period during which the image for the left eye is reproduced, and for the period during which the image for the right eye is reproduced when the backlight device is turned on.

The blink controller can generate a periodically switched blinking signal in synchronization with the reference signal extracted from the images for the left eye and for the right eye generated by the image processor, control the on / off backlight device in accordance with the periodically switched blinking signal, generate a signal for stereoscopic glasses, switchable at each low level of the flashing signal, and control the opening / closing of the shutter of the left eye and the shutter of the right eye in stereo Oscopic glasses in accordance with the control signal for stereoscopic glasses.

The pulse repetition period of the backlight driving signal and the stereoscopic glasses control signal can be controlled in accordance with the response speed of the stereoscopic image reproducing device.

According to another aspect of the present invention, there is provided a method for reproducing a stereoscopic image, including alternately reproducing repeating images for the left eye and repeating images for the right eye on a display device having a plurality of time-consistent image lines to reproduce a stereoscopic image; and adjusting the on-cycle and on-time of the backlight device divided into a plurality of light emitting segments in synchronization with the repeating images for the left eye and for the right eye.

According to another aspect of the present invention, there is provided a method for reproducing a stereoscopic image, including alternately reproducing a set of a “blind” image and an image for the left eye and a set of a “blind” image and an image for the right eye on a display device having a plurality of time-consistent image lines to reproduce a stereoscopic image; and adjusting the on-cycle and on-time of the backlight device divided into a plurality of light emitting segments in synchronization with sets of a “blind” image and an image for the left eye and with sets of a “blind” image and an image for the right eye.

According to another aspect of the present invention, there is provided a device for reproducing a stereoscopic image including an image processor alternately generating repeating images for the left eye and repeating images for the right eye and extracting a frame synchronization signal from the repeating images for the left eye and right eye; a timing controller that extracts the video data and the reference signal from the repeating images for the left eye and the right eye generated by the image processor; LCD panel that reproduces the repeating images for the left eye and the right eye generated by the image processor; a backlight device divided into a plurality of light-emitting segments providing background illumination of the LCD panel; and a blink controller that controls the cycle of the backlight device and the duration of the light-emitting segments of the backlight device in synchronization with the frame synchronization signal extracted by the image processor.

Embodiments of the invention

1 schematically shows a system for reproducing a stereoscopic image according to an embodiment of the present invention.

As follows from FIG. 1, a stereoscopic image reproducing system includes stereoscopic liquid crystal glasses 110 and a stereoscopic image reproducing apparatus 120. The device 120 for reproducing a stereoscopic image uses an LCD device or an organic light emitting diode (OLED) and alternately reproduces repeating images for the left eye and repeating images for the right eye. The device 120 for reproducing a stereoscopic image adjusts the on-cycle and the on-time of the backlight device formed by a plurality of light-emitting segments in synchronization with the repeating images for the left eye and the right eye. In an exemplary embodiment, the backlight device in the device 120 for reproducing a stereoscopic image can operate at a frequency of 120 Hz or 240 Hz.

The liquid crystal stereoscopic glasses 110 alternately open and close the shutter of the left eye and the shutter of the right eye in synchronization with the repeating images for the left eye and the right eye reproduced by the device 120 for reproducing stereoscopic images for a certain time. For example, the liquid crystal stereoscopic glasses 110 open the left eye shutter when the image for the left eye is reproduced on the device 120 for reproducing the stereoscopic image, and the right eye shutter opens when the image for the right eye is reproduced on the device 120 for reproducing the stereoscopic image.

Figure 2 presents a block diagram of a liquid crystal stereoscopic glasses 110 shown in figure 1. As follows from FIG. 2, stereoscopic liquid crystal glasses 110 include a left eye shutter 122, a right eye shutter 124, and a shutter driver 126.

In one embodiment, the driver 126 of the shutter receives a control signal for stereoscopic glasses from the device 120 for reproducing stereoscopic images in a wired or wireless manner and provides a driving signal for the shutter to the shutter 122 of the left eye or the shutter 124 of the right eye in accordance with the control signal of the stereoscopic glasses. The left-eye shutter 122 and the right-eye shutter 124 perform opening / closing operations in accordance with the shutter driving signal received from the shutter driver 126.

Figure 3 presents a block diagram of the device 120 shown in figure 1, according to a variant implementation of the present invention.

As follows from figure 3, the device 120 for reproducing a stereoscopic image includes an image processor 310, a timing controller 320, a blink controller 330, a backlight driver 340, a backlight device 350, a scan driver 360, a data driver 370 and an LCD panel 380.

The image processor 310 processes the image for the left eye and the image for the right eye, downloaded from a medium such as a digital video disc (DVD), respectively, into the repeating images for the left eye and the repeating images for the right eye. For example, repeating images for the left eye and the right eye can be generated using frame delay. An image processor 310 extracts a frame synchronization signal Vsync from an image for the left eye or an image for the right eye.

The image processor 310 may alternately output two identical images for the left eye and two identical images for the right eye.

According to another embodiment of the present invention, the image processor 310 processes the image for the left eye and the image for the right eye, loaded from a medium such as DVD, respectively, into the “blind” data / image for the left eye and into the “blind” data / image for the right eye .

Timing controller 320 extracts video data and timing control data from repeating images for the left eye and the right eye output from the image processor 310. The timing control data includes, for example, a vertical frame start signal (STV) and a vertical frame synchronization pulse signal (CPV).

The blink controller 330 generates a backlight driving control signal and a stereoscopic glasses control signal using the frame sync signal Vsync extracted by the processor 310. According to another embodiment of the present invention, the STV and CPV signals are used as reference signals for the blink control signal. The blink controller 330 generates a periodically switched background-driving excitation control signal and a periodically switched stereoscopic glasses control signal using a logic circuit such as a latch or inverter in synchronization with the frame synchronization signal Vsync. For example, the blink controller 330 turns off the backlight for a playback period during which images for the left eye and the right eye are mixed, and turns on the backlight for a period during which only one of the images for the left eye or for the right eye is played.

In addition, the blink controller 330 opens the left eye shutter in the stereoscopic liquid crystal glasses 110 shown in FIG. 1 and closes the right eye shutter in the stereoscopic liquid crystal glasses 110 for a period during which repeating images for the left eye are reproduced. The flashing controller 330 opens the shutter of the right eye and closes the shutter of the left eye for a period during which repeating images for the right eye are reproduced.

According to another embodiment of the present invention, the blink controller 330 generates a backlight driving control signal in synchronization with the frame synchronization signal Vsync extracted by the image processor 310. In this case, the blink controller 330 controls the on-cycle and on-time of the backlight device, including M blocks here, using the backlight drive control signal. The blink controller 330 generates a periodically switched backlight driving control signal using a logic circuit such as a latch or inverter in accordance with the frame synchronization signal Vsync. For example, the blink controller 330 turns off the backlight for the playback period during which the images for the left eye and the right eye are mixed, turns on the backlight for the period during which only one of the images for the left eye or for the right eye is played, and adjusts the duration of the segments backlight devices.

The backlight device 350 emits light to the LCD panel 380 in accordance with the backlight drive signal from the backlight driver 340. In this case, the backlight device 350 includes a plurality of light emitting segments that can be separately controlled. The light emitting segments are arranged in a direction perpendicular to the image lines on the LCD panel 380.

The scan driver 360 sequentially provides a selective scan signal to expand the lines on the LCD panel 380 in response to the timing control data received from the timing controller 320 so as to select a horizontal line to which a voltage corresponding to the data will be applied.

The data driver 370 sends the video data received from the timing controller 320 to the corresponding data line on the LCD panel 380.

The LCD panel 380 includes a plurality of gating lines and a plurality of data lines that are grouped into a matrix, and pixels separately located at the intersection of the gating lines and the data lines, and reproduces the image in the area corresponding to the scan line and the data line, respectively selected by the driver 360 sweep and driver 370 data.

FIG. 4 is a block diagram of a device 120 for reproducing the stereoscopic image shown in FIG. 1, according to another embodiment of the present invention.

As follows from figure 4, the device 120 for reproducing a stereoscopic image includes an image processor 410, a timing controller 420, a blink controller 430, a backlight driver 440, a backlight device 450, a scan driver 460, a data driver 470 and an LCD panel 480, which are identical to the same components of the device 120 for reproducing the stereoscopic image shown in figure 3, and therefore, their detailed description is omitted.

In this embodiment, the blink controller 430 generates a backlight drive control signal and a stereoscopic glasses control signal using timing control data such as STV and CPV signals generated by the timing controller 420. The blink controller 430 generates a periodically switched backlight drive control signal and periodically switchable control signal for stereoscopic glasses synchronously with the synchronization control data using a logic circuit such as LCA or inverter.

FIG. 5A is a timing chart that illustrates the operation of the blink controller 430 shown in FIG. 4 according to an embodiment of the present invention.

As follows from FIGS. 4 and 5A, the image processor 410 or timing controller 420 generates an STV signal or a frame synchronization signal Vsync.

Then, a periodically switched blinking signal having high and low levels is generated synchronously with the STV signal or the frame synchronization signal Vsync. Here, a flashing signal corresponds to a backlight driving signal. Accordingly, a flashing signal turns the backlight device 450 on and off in synchronization with the STV signal or the frame sync signal Vsync. For example, the backlight driver 440 drives the backlight device 450 in accordance with a periodically switched blinking signal.

In one embodiment, the blinking signal is converted to a periodically switched stereoscopic glasses control signal using a latch. That is, the control signal for the stereoscopic glasses switches at each high or low level of the blinking signal. Here, the pulse repetition period (or pulse repetition rate) of the flashing signal can be varied to adjust for crosstalk, and can be maintained between a minimum of 0.1% and a maximum of 80% in the positive and negative directions in accordance with the response speed of the LCD device.

Accordingly, the control signal of the stereoscopic glasses controls the opening / closing of the shutter of the left eye and the shutter of the right eye. For example, the shutter of the right eye closes, and the shutter of the left eye opens when the control signal for the stereoscopic glasses is low. Here, the pulse repetition period (or repetition frequency) of the stereoscopic glasses control signal can be varied to adjust for crosstalk, and be maintained between a minimum of 0.1% and a maximum of 80% in the positive and negative directions in accordance with the response speed of the LCD device.

FIG. 5B shows an example of reproducing an image for the left eye and an image for the right eye on the LCD panel 380 shown in FIG. 3 in each cycle.

As follows from FIGS. 3 and 5B, the LCD panel 380 sequentially deploys one frame of an image (image for the left eye or image for the right eye) from top to bottom of the screen. The previous frame of the image is reproduced in the lower portion of the screen, while the current frame of the image is reproduced in the upper portion of the screen. For example, if T represents the time when one frame of the image was fully reproduced, then the image for the right eye is played on the whole screen at time 0, and the image for the left eye is played on the whole screen at time T. However, between times 0 and T of the image for the left eye and the right eye are continuously changing, and thus, the image for the left eye is reproduced in the upper portion of the screen, and the image for the right eye is reproduced in the lower portion of the screen. As a result, the period is shared by images for the left eye and the right eye. If the backlight is continuously on during the shared period, the viewer sees both images for the left eye and the right eye in a mixed state without separation. This is known as crosstalk.

In one embodiment, crosstalk is suppressed by adjusting the duration and turn-on cycle of the backlight device 350, which provides backlighting to the LCD panel 380.

FIG. 6A is a timing chart illustrating an operation for eliminating crosstalk between a left eye image and a right eye image in the stereoscopic image reproducing apparatus 120 shown in FIG. 1 according to an embodiment of the present invention.

As follows from figa, the first and second images L1 and L2 for the left eye and the first and second images R1 and R2 for the right eye are displayed alternately. The first and second images L1 and L2 for the left eye are identical to each other, as are the first and second images R1 and R2 for the right eye.

When the first image L1 for the left eye is output, the image L1 for the left eye is mixed with the second image R2 for the right eye due to the data retention characteristics of the LCD device. The playback period during which the image for the left eye and the image for the right eye are mixed with each other causes crosstalk.

Here, the backlight device is turned off, the left eye shutter in the liquid crystal stereoscopic glasses is opened, and the right eye shutter in the liquid crystal stereoscopic glasses is closed for a period of time (crosstalk period) during which the first image L1 for the left eye is reproduced.

Accordingly, the image is invisible to the left eye of the viewer, because the backlight device is turned off for the playback period of the first image L1 for the left eye.

When the second left eye image L2 is output, the first left eye image L1 is mixed with the second left eye image L2 due to the data holding characteristics of the LCD device. Here, the backlight device is turned on, the shutter for the left eye is opened, and the shutter for the right eye is closed for a period of time during which the second image L2 for the left eye is reproduced. Accordingly, the full image for the left eye, without crosstalk, is displayed in the playback period of the second image L2 for the left eye.

Then, when the first image R1 for the right eye is output, the first image R1 for the right eye is mixed with the second image L2 for the left eye due to the data holding characteristics of the LCD device.

In this case, the backlight device turns off, the shutter of the left eye closes, and the shutter of the right eye opens for a period of time (the period of crosstalk) during which the first image R1 for the right eye is played. Accordingly, the image is invisible to the right eye of the viewer, since the backlight device is turned off during the reproduction period of the first image R1 for the right eye.

When the second image R2 for the right eye is output, the first image R1 for the right eye is mixed with the second image R2 for the right eye due to the data holding characteristics of the LCD device. In this case, the backlight device is turned on, the shutter of the left eye is closed, and the shutter of the right eye is opened for a period of time during which the second image R2 for the right eye is reproduced. Accordingly, a full image for the right eye, without crosstalk, is displayed during the reproduction period of the second image R2 for the right eye.

FIG. 6B is a timing chart illustrating an example of eliminating crosstalk between the image for the left eye and the image for the right eye in the stereoscopic image reproducing apparatus 120 shown in FIG.

As follows from figv, the first and second images R1 and R2 for the right eye and the first and second images L1 and L2 for the left eye are displayed alternately. The first and second images R1 and R2 for the right eye are identical to each other, as are the first and second images L1 and L2 for the left eye. The first and second left eye images L1 and L2 shown in FIG. 6B respectively replace the first and second right eye images R1 and R2 shown in FIG. 6A, and the first and second right eye images R1 and R2 shown in FIG. figv, respectively, replace the first and second images L1 and L2 for the left eye, shown in figa.

In this embodiment, the backlight device is turned off, the right eye shutter in the stereoscopic liquid crystal glasses is opened, and the left eye shutter in the stereoscopic liquid crystal glasses is closed for a period of time during which the first image R1 for the right eye is played back. Then, the backlight device is turned on, the shutter of the right eye is opened, and the shutter of the left eye is closed for a period of time during which the second image R2 for the right eye is reproduced.

FIG. 6C is a timing chart illustrating another example of eliminating crosstalk between the image for the left eye and the image for the right eye in the stereoscopic image reproducing apparatus 120 shown in FIG. 1.

As follows from figs, the only image R for the right eye and the only "blind" image, shown in figs, respectively, replace the first and second images L1 and L2 for the left eye, shown in figa, and the only image L and the only "blind" image B shown in figs, replace, respectively, the first and second images R1 and R2 for the right eye, shown in figa.

In this embodiment, the backlight device is turned off, the right eye shutter in the stereoscopic liquid crystal glasses is opened, and the left eye shutter in the stereoscopic liquid crystal glasses is closed for a period of time during which the image R for the right eye is reproduced. Then, the backlight device turns on, the shutter of the right eye opens, and the shutter of the left eye closes for a period of time during which a “blind” image B is reproduced.

FIG. 6D is a timing chart illustrating another example of eliminating crosstalk between the image for the left eye and the image for the right eye in the stereoscopic image reproducing apparatus 120 shown in FIG. 1.

As follows from fig.6D, the only image L for the left eye and the only "blind" image shown in fig.6D, respectively, replace the first and second images L1 and L2 for the left eye, shown in figa, and the only image R for the right eye and the only "blind" image B shown in fig.6D, respectively, replace the first and second images R1 and R2 for the right eye shown in figa.

In this embodiment, the backlight device is turned off, the left eye shutter in the liquid crystal stereoscopic glasses is opened, and the right eye shutter in the liquid crystal stereoscopic glasses is closed for a period of time during which the image L for the left eye is reproduced. Then, the backlight device turns on, the shutter of the right eye closes, and the shutter of the left eye opens for a period of time during which a “blind” image B is played.

FIG. 6E is a timing chart illustrating another example of eliminating crosstalk between the left eye image and the right eye image in the stereoscopic image reproducing apparatus 120 shown in FIG.

As follows from FIG. 6E, the single “blind” image B and the single image L for the left eye shown in FIG. 6E replace, respectively, the first and second images L1 and L2 for the left eye shown in FIG. 6A, and the only the “blind” image B and the single right eye image R shown in FIG. 6E replace, respectively, the first and second right eye images R1 and R2 shown in FIG. 6A.

In this embodiment, the backlight device is turned off, the right eye shutter in the stereoscopic liquid crystal glasses is closed, and the left eye shutter in the stereoscopic liquid crystal glasses is opened for a period of time during which the “blind” image B is played back. The backlight device is turned on, the shutter for the right eye closes and the shutter for the left eye opens for a period of time during which the image L for the left eye is played.

FIG. 6F is a timing chart illustrating another example of eliminating crosstalk between the image for the left eye and the image for the right eye in the stereoscopic image reproducing apparatus 120 shown in FIG. 1.

As follows from FIG. 6F, a single “blind” image B and a single image R for the right eye replace the first and second images L1 and L2 for the left eye shown in FIG. 6A, and a single “blind” image B and a single image L for the left eye shown in fig.6F, respectively, replace the first and second images R1 and R2 for the right eye, shown in figa.

For example, the backlight device turns off, the right eye shutter in the stereoscopic liquid crystal glasses opens, and the left eye shutter in the stereoscopic liquid crystal glasses closes for the period of time during which the “blind” image B is played back. The backlight device turns on, the right eye shutter opens, and the shutter for the left eye is closed for a period of time during which the image R for the right eye is reproduced.

FIGS. 7A and 7B are timing charts illustrating an example of a scan of the image for the left eye and the image for the right eye to be displayed on an LCD panel of an LCD TV with a frequency of 240 Hz, according to an embodiment of the present invention.

As follows from figa, the image for the left eye and the right eye are processed into an image for the left hole / blind data and the image for the right eye / blind data.

7A, the vertical axis represents the scan direction, that is, the location on the LCD panel screen, and the horizontal axis represents time. Also, L represents the image scan period for the left eye, R represents the image scan period for the right eye, and B represents the scan period of the “blind” data. The image L for the left eye / blind data B and the image R for the right eye / blind data B are alternately displayed on the LCD panel in accordance with the frame synchronization signal Vsync with a frequency of 240 Hz.

As follows from figv, the image for the left eye and the right eye are processed in the image for the left eye / image for the left eye and in the image for the right eye / image for the right eye.

7B, the vertical axis represents the scan direction, that is, the location on the LCD panel screen, and the horizontal axis represents time. L1 also represents the scan period of the first image for the left eye, L2 represents the scan period of the second image for the left eye, R1 represents the scan period of the first image for the right eye, and R2 represents the scan period of the second image for the right eye. The first image L1 for the left eye / second image L2 for the left eye and the first image R1 for the right eye / second image R2 for the right eye are alternately displayed on the LCD panel in accordance with the frame synchronization signal Vsync with a frequency of 240 Hz.

FIGS. 8A and 8B are timing charts illustrating an example of controlling the backlight device 350 shown in FIG. 3, which provides backlighting of an LCD panel of an LCD TV with a frequency of 240 Hz using the blink controller 330 shown in FIG. 3, according to another embodiment of the present invention. 8A and 8B, the blink controller 330 controls a backlight device 350 that operates at a frequency of 240 Hz.

As follows from FIGS. 3, 8A and 8B, the blink controller 330 turns on the backlight device 350 every two frames synchronously with images with a frame organization. In this case, the backlight device 350 is divided into M light emitting segments (or light emitting blocks in the vertical direction of the LCD panel 380). According to an embodiment, the backlight device 350 is divided into ten light emitting segments S1-S10, which can be separately controlled. The light emitting segments S1-S10 in the backlight device 350 extend parallel to the image lines. Each of the light emitting segments S1-S10 in the backlight device 350 is turned on / off synchronously with each image on the LCD panel 380.

The enable cycle of the backlight device 350 may be less than the frame sync cycle of images. In one embodiment, the enable cycle of the backlight device 350 may be set to 1 / N from the frame synchronization cycle of images, where N is an integer equal to or greater than 2 (for example, N = 2, 3, 4 ...). For example, in order to reproduce a stereoscopic image on an LCD device that operates at a frequency of 240 Hz, the switching cycle must be 120 Hz.

Also in another embodiment, the turn-on time of the backlight device 350 may be less than the frame synchronization cycle of images.

The light emitting segments S1 to S10 in the backlight device 350 may be switched on with uniform or uneven delay intervals.

8A, the blink controller 330 controls the on-cycle and on-time of the backlight device 350 in synchronization with the image L for the left eye / “blind” data B and the image R for the right eye / “blind” data B, which are output alternately in accordance with the signal Vsync frame synchronization. That is, the backlight device 350 is turned on in the image frame L for the left eye and turned off in the blind data frame B. As a result, the backlight device 350 is turned on every two frames.

Also in this embodiment, the first to tenth light-emitting segments S1 to S10 in the backlight device 350 have an on cycle less than a frame synchronization cycle of the images, and light up at regular intervals of delay.

If the backlight device 350 is turned on in each frame, the L and R images for the left and right eyes are not completely separated, and therefore, the L and R images for the left and right eyes can be mixed in the frame.

However, in FIG. 8A, the backlight device is turned on every two frames by using frames with “blind” data. And thus, crosstalk between the image for the left eye and the image for the right eye can be minimized. In addition, it is not necessary to minimize the turn-on time of the backlight in order to reduce crosstalk between images for the left eye and the right eye, and therefore, a reduction in brightness can be minimized.

8B, the first and second images R1 and R2 for the right eye and the first and second images L1 and L2 for the left eye are alternately displayed. The first and second images R1 and R2 for the right eye are identical to each other, as are the first and second images L1 and L2 for the left eye. The flashing controller 330 controls the turn-on cycle of the backlight device 350 and the delay intervals between the activation of the light emitting segments S1-S10 in the backlight device 350 in synchronization with the first image L1 for the left eye / second image L2 for the left eye and the first image R1 for the right eye / second image R2 for the right eye, which are displayed alternately in accordance with the Vsync frame synchronization signal.

The backlight device 350 is turned on in the frame of the second left eye image L2, turned off in the frame of the first right eye image R1, turned on in the frame of the second right eye image R2, and turned off in the frame of the first left eye image L1. As a result, the backlight device 350 is turned on every two frames. In addition, the light emitting segments S1-S10 of the backlight device 350 have an on cycle less than a frame synchronization cycle of images, and are turned on at regular intervals of delay.

Accordingly, in FIG. 8B, the backlight is turned on every two frames by using repetitive image frames for the left eye and the right eye, and thus, crosstalk between the image for the left eye and the image for the right eye can be minimized. In addition, it is not necessary to minimize the turn-on time of the backlight in order to reduce crosstalk between images for the left eye and the right eye, and therefore, a reduction in brightness can be minimized.

FIGS. 9A and 9B are timing charts illustrating an example of controlling the backlight device 350 shown in FIG. 3, which provides backlighting of an LCD panel in a 240 Hz LCD TV by using the blink controller 330 shown in FIG. .3, according to another embodiment of the present invention.

As follows from FIGS. 3, 9A and 9B, the light emitting segments S1-S10 of the backlight device 350 have uneven on-delay times. The first and second light emitting segments S1 and S2 are turned on at the same time, and the ninth and tenth light emitting segments S9 and S10 are also turned on at the same time.

10 is a flowchart of a stereoscopic image reproducing method according to an embodiment of the present invention.

As follows from FIG. 10, first, in operation 1005, repeating images for the left eye and repeating images for the right eye are alternately received to reproduce a stereoscopic image. In one embodiment, the first and second images for the left eye and the first and second images for the right eye are alternately input into a device for reproducing a stereoscopic image.

Then, in operation 1010, it is determined whether the inputted image corresponds to the image for the left eye or the image for the right eye according to a predetermined signal format.

When the input image corresponds to the image for the left eye, in step 1020 it is determined whether the input image corresponds to the first image for the left eye or the second image for the left eye.

If the input image corresponds to the first image for the left eye, the left eye shutter in the stereoscopic liquid crystal glasses opens in operation 1032, the right eye shutter in the stereoscopic liquid crystal glasses closes in operation 1034, and the backlight device turns off in operation 1036 for a period of time during which the first image for the left eye.

But if the input image corresponds to the second image for the left eye, the left eye shutter is opened in operation 1042, the right eye shutter is closed in operation 1044, and the backlight device is turned on in operation 1046 for a period of time during which the second image for the left eye is reproduced.

Similarly, when the input image corresponds to the image for the right eye, in step 1050 it is determined whether the input image corresponds to the first image for the right eye or the second image for the right eye.

If the input image corresponds to the first image for the right eye, the left eye shutter is closed in operation 1062, the right eye shutter is opened in operation 1064, and the backlight device is turned off in operation 1066 for a period of time during which the first image for the right eye is played back.

But if the input image corresponds to the second image for the right eye, the left eye shutter is closed in operation 1072, the right eye shutter is opened in operation 1074, and the backlight device is turned on in operation 1076 for a period of time during which the second image for the right eye is reproduced.

The operations are repeated until the device for reproducing a stereoscopic image is turned off.

11 is a flowchart of a stereoscopic image reproducing method in another embodiment of the present invention.

As follows from FIG. 11, first, in operation 1105, repeating images for the left eye and repeating images for the right eye are alternately received to reproduce the stereoscopic image. In one embodiment, the first and second images for the left eye and the first and second images for the right eye are alternately input into a device for reproducing a stereoscopic image. In this embodiment, repeating images for the left eye and the right eye are alternately reproduced on a display device having a plurality of time-consistent image lines.

Then, in step 1110, it is determined whether the inputted image corresponds to the image for the left eye or the image for the right eye in accordance with a predetermined signal format.

If the input image corresponds to the image for the left eye, in step 1120 it is determined whether the input image corresponds to the first image for the left eye or the second image for the left eye.

If the input image corresponds to the first image for the left eye, the left eye shutter in the stereoscopic liquid crystal glasses opens in operation 1132, the right eye shutter in the stereoscopic liquid crystal glasses closes in operation 1134, and the backlight device is turned off in operation 1136 for a period of time during which the first image for the left eye.

But if the input image corresponds to the second image for the left eye, the left eye shutter is opened in operation 1142, the right eye shutter is closed in operation 1144, and the backlight device is turned on, and the duration of the on segments of the backlight device is adjusted in step 1146 in a period of time, in during which the second image is played for the left eye. The duration of the inclusion of segments of the backlight device can be adjusted with uniform or uneven delay intervals.

Similarly, if the input image corresponds to the image for the right eye, in step 1150 it is determined whether the input image corresponds to the first image for the right eye or the second image for the right eye.

Then, if the input image corresponds to the first image for the right eye, the left eye shutter is closed in operation 1162, the right eye shutter is opened in operation 1164, and the backlight device is turned off in operation 1166 for a period of time during which the first image for the right eye is reproduced.

But if the input image corresponds to the second image for the right eye, the left eye shutter is closed in operation 1172, the right eye shutter is opened in operation 1174, and the backlight device is turned on, and the duration of the on segments of the backlight device is adjusted in step 1176 in a time period, in during which a second image is played for the right eye. In this case, the duration of the inclusion of segments of the backlight device is controlled with uniform or uneven delay intervals.

The operations are repeated until the device for reproducing a stereoscopic image is turned off.

In addition, according to another embodiment of the present invention, the first and second images for the left eye can be replaced with “blind” data and the image for the left eye, and the first and second images for the right eye can be replaced with “blind” data and the image for the right eye. The “blind” data / image for the left eye and the “blind” data / image for the right eye are alternately reproduced on a display device having a plurality of time-consistent image lines.

In this embodiment, the backlight device is turned off for a period of time during which “blind” data is played, and the backlight device is turned on, and the duration of the on segments of the backlight device is adjusted during the time period during which the image for the left eye or the image for right eye.

Industrial applicability

Exemplary embodiments of the present invention include a computer-readable code on a computer-readable storage medium. A computer-readable storage medium may be any device for storing data that can subsequently be read by a computer system. Examples of computer-readable storage media include read-only memory (ROM), random access memory (RAM), CD-ROM, magnetic tapes, floppy disks, and optical storage devices. Computer-readable storage media can also be distributed through network-connected computer systems, so that the computer-readable code is stored and executed in a distributed manner.

Although the present invention has been specifically presented with reference to examples of its implementation, specialists in the art will understand that various changes in form and details can be made therein without deviating from the essence and scope of the present invention defined by the following claims inventions or their equivalents.

Claims (42)

1. A method of reproducing a stereoscopic image, which contains:
alternating generation of repeating images for the left eye and repeating images for the right eye;
turning off the backlight device for a period of time during which the image for the left eye and the image for the right eye are mixed, and turning on the backlight device for the period of time during which only one of the images for the left eye and for the right eye is reproduced; and
control of the shutter of the left eye and the shutter of the right eye in stereoscopic glasses during the period of time during which the backlight device is turned on.
2. The method according to claim 1, in which the alternate generation of repeating images for the left eye and the right eye comprises alternately generating at least one image for the left eye and at least one image for the right eye.
3. The method according to claim 1, in which the alternate generation of repeating images for the left eye and for the right eye comprises alternately generating a set of images including an image for the left eye and a "black" image, and a set of images including an image for the right eyes and a black image.
4. The method according to claim 1, in which the alternate generation of repeating images for the left eye and for the right eye comprises alternately generating a set of images including a first image for the left eye and a second image for the left eye, and a set of images including the first image for the right eye and a second image for the right eye.
5. The method according to claim 4, in which turning on and off the backlight device comprises:
controlling a backlight device to turn it on and off synchronously with a given reference signal;
turning off the backlight device for a period of time during which the first image for the left eye or the first image for the right eye is played;
turning on the backlight device for a period of time during which a second image for the left eye or a second image for the right eye is reproduced.
6. The method according to claim 4, in which the period during which only the image for the left eye is reproduced corresponds to the period during which the first and second images for the left eye are mixed and only the image for the left eye is reproduced.
7. The method according to claim 4, in which the period during which only the image for the right eye is reproduced corresponds to the period during which the first and second images for the right eye are mixed and only the image for the right eye is reproduced.
8. The method according to claim 1, in which the control shutter for the left eye and the shutter for the right eye in stereoscopic glasses contains:
control of shutters for the left eye and for the right eye in stereoscopic glasses for opening and closing them synchronously with a given reference signal;
opening the shutter for the left eye and closing the shutter for the right eye for a period of time during which repeating images for the left eye are played;
opening the shutter for the right eye and closing the shutter for the left eye for a period of time during which repeating images for the right eye are played.
9. The method according to claim 1, in which turning on and off the backlight device includes controlling the on or off of the backlight device in accordance with a given reference signal and
controlling a shutter for the left eye and a shutter for the right eye in stereoscopic glasses comprises controlling stereoscopic glasses for opening or closing them, based on the state of the backlight device.
10. The method according to claim 5, in which the specified reference signal corresponds to the frame synchronization signal extracted from the video data.
11. The method according to claim 5, in which the specified reference signal corresponds to the start signal of the frame scan or a synchronizing pulse signal of the frame scan generated by the timing controller.
12. A device for reproducing a stereoscopic image, which contains:
an image processor that alternately generates repeating images for the left eye and repeating images for the right eye;
a timing controller that extracts the video data and the reference signal from the images for the left eye and the right eye generated by the image processor;
and a blink controller that generates a backlight driving control signal and a shutter control signal in synchronization with the reference signal extracted by the timing controller,
moreover, the blink controller turns off the backlight device for a period of time during which the image for the left eye and the image for the right eye are mixed, turns on the backlight device for the period of time during which only one of the images for the left eye and the right eye is played, opens the shutter for the left eye and closes the shutter for the right eye in stereoscopic glasses for the period of time during which the image for the left eye is played, and opens the shutter for the right on the eyes and closes the shutter for the left eye in the stereoscopic glasses on the period of time during which the reproduced image for the right eye.
13. The device according to item 12, in which the device for reproducing a stereoscopic image is a holding type reproducing device or a reproducing device using a backlight device as a light source.
14. The device according to item 12, further containing a driver of the liquid crystal shutter, which supplies a driving signal to the shutters for the left eye and the right eye in accordance with the control signal of the stereoscopic glasses, opens the shutter for the left eye for the playback period of the image for the left eye and opens the shutter for the right eye for the playback period of the image for the right eye.
15. The device according to item 12, in which the blink controller generates a periodically switched flashing signal in synchronization with the reference signal, controls a backlight device that must be turned on or off in accordance with the periodically switched flashing signal, generates a shutter control signal periodically switched at each low level of the blinking signal, and controls the shutters of stereoscopic glasses, which must open or close in accordance with the control signal stereoscopically and glasses.
16. The device according to item 12, in which the pulse repetition periods of the excitation control signal of the backlight device and the control signal of the stereoscopic glasses are controlled in accordance with the response speed of the device for reproducing stereoscopic images.
17. A method for reproducing a stereoscopic image, which contains:
alternately reproducing repeating images for the left eye and repeating images for the right eye on a display device having a plurality of time-consistent image lines to reproduce a stereoscopic image; and
adjusting the on-cycle and the on-time of the backlight device divided into a plurality of light emitting segments in synchronization with the repeating images for the left eye and for the right eye.
18. The method according to 17, in which the inclusion cycle of the backlight device is less than the cycle of frame synchronization of images.
19. The method according to 17, in which the inclusion cycle of the backlight device is 1 / N of the frame synchronization cycle of the image, where N is an integer equal to or greater than 2.
20. The method according to 17, in which the backlight device is turned on every two frames.
21. The method according to 17, in which the on time of the backlight device has uniform or uneven delay intervals.
22. The method of claim 17, wherein the light emitting segments of the backlight device are formed in a vertical direction of the display device.
23. The method according to 17, in which the regulation of the inclusion cycle and the duration of the inclusion of the backlight device comprises:
turning on or off the backlight device synchronously with a given reference signal;
turning off the backlight device for a period of time during which the first image for the left eye or the first image for the right eye is played;
turning on the backlight device and adjusting the duration of turning on the segments of the backlight device for a period of time during which a second image for the left eye or a second image for the right eye is played.
24. A method of reproducing a stereoscopic image, which contains:
alternately reproducing a set of a black image and an image for the left eye and a set of a black image and an image for the right eye on a display device having a plurality of time-consistent image lines to reproduce a stereoscopic image; and
adjusting the on-cycle and on-time of the backlight device, which is divided into a plurality of light emitting segments, in synchronization with a set of a “black” image and an image for the left eye and a set of a “black” image and an image for the right eye.
25. The method according to paragraph 24, in which the inclusion cycle of the backlight device is less than the cycle of frame synchronization of images.
26. The method according to paragraph 24, in which the cycle for turning on the backlight device is 1 / N of the frame synchronization cycle of images, where N is an integer equal to or greater than 2.
27. The method according to paragraph 24, in which the regulation of the inclusion cycle and the duration of the inclusion of the backlight device includes:
turning on and off the backlight device synchronously with a given reference signal;
turning off the backlight device for a period of time during which a "black" image is played; and
turning on the backlight device and adjusting the duration of turning on the segments of the backlight device for a period of time during which the image for the left eye or the image for the right eye is reproduced.
28. A device for reproducing a stereoscopic image, which contains:
an image processor that alternately generates repeating images for the left eye and repeating images for the right eye and extracts a frame synchronization signal from the repeating images for the left eye and right eye;
a timing controller that extracts the video data and the reference signal from the repeating images for the left eye and the right eye generated by the image processor;
a liquid crystal (LCD) display panel that reproduces the repeating images for the left eye and the right eye generated by the image processor;
a backlight device divided into a plurality of light emitting segments that provide background illumination of the LCD panel; and
a blink controller that controls the on cycle of the backlight device and the duration of the light-emitting segments of the backlight device in synchronization with the frame synchronization signal extracted by the image processor.
29. The device according to p, in which the blink controller adjusts the power cycle of the backlight device to make it equal to 1 / N cycle frame synchronization of images, where N is an integer equal to or greater than 2.
30. The device according to p. 28, in which the blink controller adjusts the turn-on time of the light-emitting segments of the backlight device with uniform or uneven delay intervals.
31. A computer-readable storage medium having a computer program recorded thereon for executing a method according to claim 1.
32. A system for reproducing stereoscopic images, which contains:
a device for reproducing a stereoscopic image that inserts a predetermined image between the image for the left eye and the image for the right eye and generates a shutter control signal, the device for reproducing includes an adjustable background illumination; and
stereoscopic glasses, including a shutter for the left eye and a shutter for the right eye, which are controlled by the shutter control signal.
33. The stereoscopic image reproducing system of claim 32, wherein the backlight is turned off during playback of a predetermined image and turned on during playback of an image for the left eye or an image for the right eye.
34. The stereoscopic image reproducing system of claim 32, wherein the shutter for the left eye is opened and the shutter for the right eye is closed during playback of the image for the left eye.
35. The stereoscopic image reproducing system of claim 32, wherein the shutter for the right eye is opened and the shutter for the left eye is closed during playback of the image for the right eye.
36. The stereoscopic image reproducing system of claim 32, wherein the predetermined image is a “black” image.
37. The system for reproducing a stereoscopic image according to claim 32, wherein the predetermined image is identical to the next sequential image.
38. A method for reproducing a stereoscopic image, which comprises:
alternately reproducing at least one image for the left eye and at least one image for the right eye in accordance with a predetermined sequence; and
controlling a backlight device comprising a plurality of segments that must be turned off for a period of time during which the image for the left eye and the image for the right eye are reproduced simultaneously, and at least one segment of the backlight device must be turned on during the period of time during which only one of the images for the left and right eyes.
39. The method according to § 38, in which each segment of the backlight device can be sequentially turned on and off synchronously with a scan of one of the images for the left and right eyes during a period of time during which only one of the images for the left and right eyes is played.
40. The method according to § 38, in which many segments of the backlight device is located in the vertical direction of the display.
41. The method of claim 38, wherein the predetermined sequence comprises a repeating sequence consisting of an image for the left eye, an image for the left eye, an image for the right eye, and an image for the right eye.
42. The method according to § 38, which further comprises:
sending a synchronization signal to stereoscopic glasses in order to synchronize the stereoscopic glasses, and the shutter for the left eye and the shutter for the right eye can be controlled in accordance with the synchronization signal.
RU2011110073/07A 2008-09-17 2009-08-28 Method and apparatus for displaying stereoscopic image RU2464726C1 (en)

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KR10-2009-0037823 2009-04-29
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