KR20060007662A - Display apparatus and method for stereo-scopic image based to liquid crystal shutter - Google Patents

Abstract

The present invention relates to a three-dimensional image display device and method of the liquid crystal shutter method, in particular, by controlling the display time of the left and right image displayed on the liquid crystal monitor and the opening and closing time of the liquid crystal shutter glasses based on the stereo sync signal The purpose is to enable efficient viewing of stereoscopic images at low cost. According to the present invention, a liquid crystal monitor 200 for displaying an image and a liquid crystal monitor for separating a left eye image and a right eye image into a left eye image and a right eye image, respectively, are synthesized in frame or field units. The image control unit 300 and the stereo sync signal generator 400 for processing a video sync signal output from the liquid crystal monitor 3D image control unit 300 and a signal input from the SDA terminal to generate a stereo sync signal, and the liquid crystal. Left eye image signal and right eye connected to the liquid crystal shutter glasses 600 worn for viewing an image displayed on the monitor, the stereo sync signal generator and the liquid crystal shutter glasses for liquid crystal display, and displayed on the liquid crystal display device. The left and right eyeglass shutters of the liquid crystal shutter glasses for the liquid crystal monitor in synchronization with the It characterized in that it comprises a liquid crystal shutter drive control unit 500 to open and close each.

LCD shutter, stereoscopic image, LCD monitor.

Description

Liquid crystal shutter-type stereoscopic image display device and method {DISPLAY APPARATUS AND METHOD FOR STEREO-SCOPIC IMAGE BASED TO LIQUID CRYSTAL SHUTTER}

1 is a block diagram showing an embodiment of a three-dimensional image display device of the liquid crystal shutter method according to the present invention.

2 is a detailed block diagram of the apparatus of FIG.

Figure 3 is a perspective view showing one embodiment of the liquid crystal shutter glasses for the liquid crystal monitor according to the present invention.

Figure 4 is a perspective view showing another embodiment of the liquid crystal shutter glasses for the liquid crystal monitor according to the present invention.

Explanation of symbols on the main parts of the drawings

100: interface 200: liquid crystal monitor

300: liquid crystal monitor stereoscopic image control unit 400: stereoscopic synchronization signal generator

500: liquid crystal shutter drive control unit 600: liquid crystal shutter glasses for liquid crystal monitor

700: infrared wireless transmitter 800: liquid crystal shutter glasses for liquid crystal monitor

The present invention relates to a stereoscopic image display, and more particularly, to a stereoscopic image display device and method of the liquid crystal shutter method.

In general, a display device is a device for displaying an image through digital sampling and a series of signal processing of an image signal transmitted from a video card.

Currently, display devices are being replaced by liquid crystal monitors in cathode ray tube monitors.

The factors that make a person feel three-dimensional are physiological and empirical factors.

In 3D image display technology, the stereoscopic sense of an object is generally sensed by using binocular parallax, which is the biggest factor for recognizing stereoscopic feeling at near distance.

There are two methods of viewing three-dimensional images: glasses and glasses-free glasses.

The way of wearing glasses is the anaglyph method, which uses blue and red sunglasses, and the polarization method, which uses polarized glasses with different polarization directions, and the time-divided screen is periodically repeated and synchronized with this cycle. And a liquid crystal shutter glasses type (or time division method) using glasses provided with a liquid crystal shutter.

Representative examples of glasses-free glasses are a lenticular method in which a lenticular lens plate in which a cylindrical lens array is arranged vertically is installed in front of an image panel, and a parallax barrier method. have.

Hereinafter, a case of the stereoscopic image display device of the liquid crystal shutter glasses method will be described.

The three-dimensional image display device of the liquid crystal shutter glasses type is a method of displaying a left eye image and a right eye image alternately quickly and synchronizing with the left eye image to realize a three-dimensional image by opening and closing the liquid crystal shutter glasses for a predetermined time.

That is, when the left eye image is displayed on the screen, the left liquid crystal shutter of the glasses is opened for the screen display time, and the right liquid crystal shutter of the glasses is displayed for the screen display time when the left eye image is displayed on the screen. The action of opening is repeated very quickly.

Therefore, because the left and right images are displayed alternately very quickly, the human eye rarely detects the time difference, so each image is almost continuously displayed at the same time in the human brain. It is recognized as a stereoscopic image.

In addition, a stereoscopic image apparatus using a liquid crystal monitor rather than a liquid crystal shutter method is also proposed. The stereoscopic imaging apparatus using a liquid crystal monitor is configured to view a stereoscopic image by precisely attaching a micro polarizing film or a vertically arranged stereoscopic barrier film to a monitor surface when manufacturing a liquid crystal monitor.

However, the stereoscopic imaging apparatus using the conventional liquid crystal shutter is applied only to the cathode ray tube monitor and cannot be applied to the liquid crystal monitor, for the following reasons.

First, since the image display optical structures of the cathode ray tube monitor and the liquid crystal monitor are different from each other, the liquid crystal shutter used for the cathode ray tube monitor cannot be used to view an image. That is, when the screen of the LCD monitor is viewed through the conventional LCD shutter, the image is blocked and the image cannot be viewed at all.

Secondly, the cathode ray tube monitor displays an input image signal in real time, but in the case of the liquid crystal monitor, the digital processing time and the response time of the liquid crystal itself are very slow at several tens of milliseconds (ms).

Third, even when the first problem is solved, when the stereoscopic control device used in the cathode ray tube monitor is used, the synchronization of opening and closing the liquid crystal shutter and the synchronization of the image are inconsistent, resulting in a double overlap of the left eye image and the right eye image. I could not see the stereoscopic image.

In addition, the stereoscopic imaging apparatus using the liquid crystal monitor has the following problems.

First, it is not applicable to the liquid crystal monitor in use, so it is necessary to purchase a new stereoscopic liquid crystal monitor with a built-in stereoscopic function.

Second, the content production process is complicated.

Third, the viewing angles of the top, bottom, left and right of the stereoscopic image viewing are extremely narrow, so that the stereoscopic image is not visible depending on the direction in which the user moves or views the image. In particular, it does not overcome the big disadvantage that the three-dimensional image is not applied other than a specific resolution (1024x768) or a liquid crystal monitor of a certain size.

Accordingly, the present invention implements the liquid crystal shutter glasses to have the same polarization angle as the conventional liquid crystal monitor in order to improve the conventional problems, and the display time of the left and right eye images displayed on the liquid crystal monitor based on the stereo sync signal and the liquid crystal shutter It is an object of the present invention to provide a liquid crystal shutter-type stereoscopic image display device and method for controlling the opening and closing time of glasses to enable efficient viewing of a stereoscopic image at low cost using a conventional liquid crystal monitor.

The present invention provides a three-dimensional image display device using a liquid crystal monitor in order to achieve the above object, a three-dimensional image control unit for alternately displaying the left eye image and the right eye image alternately from the stereoscopic image control unit or the SDA terminal The stereoscopic synchronous signal generator for receiving a stereoscopic signal and generating a stereoscopic synchronous signal, liquid crystal shutter glasses worn to view a stereoscopic image displayed on the liquid crystal monitor, and the stereoscopic synchronous signal for the stereoscopic synchronous signal generator; A liquid crystal shutter driving control unit for inputting a stereoscopic synchronization signal to the image control unit and transmitting a signal for synchronizing the shutter opening and closing of the liquid crystal shutter glasses to the left eye image and the right eye image displayed on the LCD monitor to the liquid crystal shutter glasses. It is characterized by including the configuration.

In addition, the apparatus of the present invention, including the infrared wireless transmission unit for transmitting the stereoscopic synchronization signal from the stereoscopic image synchronization signal generator to a separate liquid crystal shutter glasses in the infrared communication method is configured to enable stereoscopic image viewing at a long distance. It is characterized by.

In order to achieve the above object, the present invention provides a stereoscopic image by alternately displaying left and right eye images on a liquid crystal monitor, wherein the stereosynchronous signal inputted to a vertical synchronizing signal or an SDA terminal included in the image signal. Generating a stereo synchronous signal by inputting the signal; synthesizing with an odd-numbered horizontal synchronous signal when the vertical synchronous signal is high by inputting the vertical synchronous signal and the horizontal synchronous signal included in the image signal; Synthesizing with an even-numbered horizontal synchronizing signal when low, alternately transmitting and displaying left and right eye images to a liquid crystal monitor based on the stereo synchronizing signal and the synthesized synchronizing signal; And opening and closing the left and right liquid crystal shutters of the liquid crystal shutter glasses according to the high and low signal to display the image displayed on the liquid crystal monitor as a stereoscopic image. It is characterized by the configuration.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a block diagram of a three-dimensional image display apparatus of a liquid crystal shutter method according to the present invention, as shown in FIG. 1, a three-dimensional image synthesized in units of frames or fields, and a left eye image. Input from the liquid crystal monitor stereoscopic image control unit 300 to separate the right eye image, the image (RGB) and the synchronization signal (V, H) and the SDA (Serial Data Adapter) terminal outputted from the liquid crystal monitor stereoscopic image control unit 300 A stereoscopic synchronous signal generator 400 for processing a signal to generate a stereoscopic synchronous signal, a liquid crystal shutter glasses 600 for a liquid crystal monitor worn to watch an image displayed on the liquid crystal monitor 200, and The liquid crystal shutter glasses 600 for the liquid crystal monitor are connected to the stereoscopic synchronization signal generator 400 and the liquid crystal shutter glasses 600 for the liquid crystal monitor and synchronized with the left eye image and the right eye image displayed on the liquid crystal monitor 200. Left The liquid crystal shutter driving control unit 500 controls the opening and closing of the right eye liquid crystal shutter to be opened and closed for a predetermined time period of the stereoscopic synchronization signal, and the stereoscopic synchronization signal is controlled by the infrared communication method so that the stereoscopic image can be viewed even at a distance. It is configured to include an infrared wireless transmitting unit 700 for transmitting to 800.

Referring to the operation and effect of the embodiment of the present invention configured as described above are as follows.

When the image reproduced by a computer, a digital broadcast receiver, etc. is separated into R, G, and B signal components and inputted through the interface 100 together with the horizontal and vertical synchronization signals H and V, the stereo synchronization signal generator 400 The liquid crystal shutter driving controller 500 selects and outputs one of the three-dimensional signal or the divided signal of the vertical synchronization signal V included in the SDA terminal signal, and the liquid crystal shutter driving controller 500 outputs the liquid crystal monitor based on the output signal of the stereo-synchronous signal generator 400. A signal for controlling the input time of the image signals R, G, and B to the 200 and the opening and closing time of the liquid crystal shutter glasses 600 for the liquid crystal monitor are output.

In this case, the liquid crystal monitor stereoscopic image control unit 300 divides and processes the horizontal and vertical synchronization signals H and V, and then, based on the control signal of the liquid crystal shutter driving control unit 500, the image signal ( R, G, and B are transmitted to the liquid crystal monitor 200 to display left and right images alternately.

Accordingly, the liquid crystal shutter glasses 600 for the liquid crystal monitor open and close the left eye liquid crystal shutter and the right eye liquid crystal shutter alternately by the control of the liquid crystal shutter driver 500 so that the left and right eye images displayed on the liquid crystal monitor 200 are stereoscopic images. To look like

In addition, the infrared wireless transmitter 700 converts the output signal of the stereo sync signal generator 400 into an infrared signal and transmits the infrared signal.

Accordingly, the liquid crystal shutter glasses 800 for the liquid crystal monitor receive the infrared signal, extract the output signal of the stereoscopic signal generator 400, and perform the same processing as the liquid crystal shutter glasses 600 for the liquid crystal monitor. The left and right eye images displayed on the LCD monitor 200 can be viewed as a stereoscopic image.

In addition, a detailed block diagram of an embodiment of the present invention is shown in FIG. 2 to help a more general understanding of the present invention.

In the description of the operation of FIG. 2, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1. Detailed operation of the stereoscopic image control unit 300 for a liquid crystal monitor will be described.

In FIG. 2, the liquid crystal monitor 3D image controller 300 includes an analog image selector 310, an image signal amplifier 320, a phase shifter 330, a vertical synchronization divider 340, a horizontal synchronization delayer 350, and a pulse generator. 360, a horizontal synchronous divider 370, a synthesizer 380, and a selector 390.

The vertical synchronization signal V applied from the interface 100 is applied in a positive signal method and a negative signal method according to the resolution and the vertical update frequency, and the phase shifter 330 may receive the vertical synchronization signal ( V) is always converted to a positive signal method, and the converted signal is transmitted to the vertical synchronization divider 340, the vertical synchronization delay unit 350, the pulse generator 360, and the liquid crystal monitor 200, and at the same time, the stereo synchronization signal. The generator 400 transmits the divider 410.

The vertical synchronous divider 340 divides the signal received from the phase converter 330 into 1/2 and outputs the synthesized signal to the synthesizer 380.

The vertical synchronization delayer 350 delays the signal applied from the phase shifter 330 and applies the delayed signal to the pulse generator 360. The delay time is a few microseconds (1-10 ms), with a slight difference.

The pulse generator 360 compares the signal applied from the phase converter 330 with the signal received from the vertical synchronization delayer 350 and generates a pulse according to the difference value to initialize the terminal of the horizontal synchronization divider 370. Is applied to initialize the horizontal synchronous divider 370.

The horizontal synchronous divider 370 divides the horizontal synchronous signal received from the interface 100 into 1/2 and applies it to the synthesizer 380.

The synthesizer 380 receives the output signal of the horizontal synchronous divider 370 and the output signal of the vertical synchronous divider 340, and when the output of the vertical synchronous divider 340 is high, the horizontal synchronous divider Synthesized with an odd (1,3,5,7 ...) high signal of (370),

When the output of the vertical synchronization divider 340 is LOW, it is synthesized with the even-numbered (2, 4, 6, 8 ...) HIGH signal of the horizontal synchronization divider 370. The composite signal is applied to the selector 390.

The selector 390 receives a control signal output from the stereo synchronous signal detector 570 of the liquid crystal shutter driving control unit 500 and controls a signal of the analog image selector 310 to control the analog image selector 310. Output to the terminal.

That is, the selector 390 applies the RGB image signal inputted by the analog image selector 310 to the interface 100 to the image signal amplifier 320 as it is when the stereo synchronization signal is not detected by the stereo synchronization signal detector 570. A low signal is output to the analog image selector 310 as a control signal, and when a stereo synchronous signal is detected, the analog image selector 310 selectively receives the RGB image signal applied from the interface 100 to the image signal. The output signal of the synthesizer 380 is applied to the control terminal of the analog image selector 310 to be applied to the amplifier 320.

The analog image selector 310 receives the control signal from the selector 390 to determine the output of the RGB image signal applied from the interface 100.

That is, if the stereo sync signal is not detected, the analog image selector 310 applies the RGB image applied from the interface 100 to the image signal amplifier 320 without any signal manipulation.

When the stereo sync signal is detected, the analog image selector 310 selects an image of odd (1,3,5,7,9 ...) horizontal lines as it is in the first image, and selects even (2,4,6, 8, ...) Blocks the image of the horizontal line and applies a blank image to the video signal amplifier 320. In the case of the second image, the image of the even horizontal line is selected as it is and the image of the odd horizontal line is blocked. The blank image is applied to the video signal amplifier 320.

In this case, when the size of the LCD monitor is 17 inches or more, it is preferable that the analog image selector 310 selects a device having a low resistance and a bandpass frequency band of 200 MHz or higher in the high resolution SXGA (1280 X 1024) class.

The image signal amplifier 320 receives a control signal from the stereo synchronous signal detector 570 and outputs an image signal of the analog image selector 310 to the liquid crystal monitor 200 to display an image. That is, the image amplifier 320 applies the input image signal to the liquid crystal monitor 200 as it is, when the stereoscopic image synchronization signal is not detected. The image signal is amplified by 10dB and applied to the liquid crystal monitor 200. The signal amplification ratio of the image signal amplifier 320 may be provided with an adjustment function so that the user can adjust it.

The video signal amplifier 320 displays an image signal that is a loss generated by the analog image selector 310 and becomes a horizontal line blank is darker on the LCD monitor than an image that is not a horizontal line blank. To play a role to do, it does not have to be provided.

The liquid crystal monitor 200 receives an RGB image signal and displays an image in synchronization with a horizontal synchronization signal H and a vertical synchronization signal applied from a phase converter 330. The liquid crystal monitor 200 may use a product 17 inches or more that are commonly commercialized, and it is preferable to use a product having a response speed of 25 ms or less.

2. The detailed operation of the three-dimensional synchronous signal generator 400 is as follows.

In FIG. 2, the stereo synchronous signal generator 400 includes a divider 410, a stereo signal discriminator 420, a mode discriminator 430, a selector 440, and a phase controller 450.

Display Data Channel (DDC) is generally used as a means of communication between a monitor and a computer for the purpose of Plug IN Play of a monitor. However, the serial data line (SDA) of the interface 100 is recently used when producing 3D image software. It is designed to send a stereoscopic image signal and is used a lot, and it is expected to be used universally in the future.

When the stereo signal is executed, the stereo signal discriminator 420 applies a control signal indicating that the stereo signal is detected to the mode discriminator 430 when the stereo signal is included in the SDA signal of the interface 100. The stereo signal is applied to the selector 440.

In the present invention, when you want to see the three-dimensional program or three-dimensional content, in addition to the SDA line can be processed separately to generate a control signal automatically or by using a physical switch can be generated manually the control signal. The signal generated in this way is applied to the mode discriminator 430 by the mode selector 110 and used to control the stereo sync signal generation.

The mode discriminator 430 reads the control signal of the mode selector 110 and the control signal applied from the stereoscopic signal discriminator 420 to determine the current mode state and controls the signal of the selector 440 according to the determination. Applied to the terminal. The output signal of the mode discriminator 430 becomes a reference signal of the stereoscopic image synchronization signal.

The divider 410 divides the signal output from the phase converter 330 so that the ratio of the high signal to the low signal becomes 50% and applies it to the input of the selector 440.

The selector 440 selects a signal from the divider 410 or the stereoscopic signal discriminator 420 according to a control signal applied from the mode discriminator 430, and applies the signal to the phase controller 450. That is, when the mode selector 110 is in an OFF state or when a signal applied through the SDA line is determined as a stereoscopic signal, the selector 440 receives the stereoscopic signal received from the stereoscopic signal discriminator 420. 450 and a stereo signal is not detected in the SDA line, but when the mode selector 110 is selected, the signal applied from the divider 410 is output.

When the SDA line of the interface 100 has no stereo signal and the mode selector 110 is also turned off, the selector 440 selects a terminal connected to the stereo signal discriminator 420.

On the other hand, since the production method of the three-dimensional program or three-dimensional content is different for each producer or production company, left and right stereoscopic images may change each other. In this case, the phase shifter 120 is provided to correct the left and right eye images of the stereoscopic image.

The phase shifter 120 is connected to a computer to automatically generate a control signal or manually generate a control signal using a physical switch, and apply the control signal to the phase controller 450.

The phase controller 450 outputs the three-dimensional synchronous signal applied from the selector 440 to the phase or inverted signal to the amplifier 510 according to the control signal of the phase shifter 120.

However, when the phase shift function is included in the software and the content program, the phase shifter 120 and the phase controller 450 may not be provided.

3. The detailed operation of the liquid crystal shutter driving control unit 500 is as follows.

In FIG. 2, the liquid crystal shutter driving control unit 500 includes an amplifier 510, a rising edge detector 520, a pulse width delay unit 525, a left eye liquid crystal shutter driver 530, a falling edge detector 540, and a pulse width delay unit. 545, a right eye liquid crystal shutter driver 550, a frequency counter 560, a stereo sync signal detector 570, and a liquid crystal shutter driving controller 580.

The amplifier 510 voltage-amplifies the stereo sync signal to the rising edge detector 520, the frequency counter 560, the falling edge detector 540, the liquid crystal shutter drive controller 560, and the stereo sync signal detector 570, respectively. Is authorized.

The stereo synchronous signal detector 570 detects only a signal within 20 Hz to 200 Hz among the signals applied from the amplifier 510, and determines that the stereo image synchronization signal is a stereoscopic image synchronization signal when the signal has a duty cycle of 50% and repeats a certain period. The determined result value is applied to the image signal amplifier 320, the selector 390, and the frequency synthesizer 720 to control the stereoscopic image, and the liquid crystal is driven to drive the liquid crystal shutter 600 for the liquid crystal monitor. The shutter driving controller 580 is applied.

If no signal is applied or a signal is out of a specific frequency band, the stereo synchronous signal detector 570 does not output a control signal in consideration of noise or an error.

The liquid crystal shutter driving controller 580 receives a control signal from the stereo sync signal detector 570. When the stereo sync signal of high is received from the amplifier 510, the liquid crystal shutter glasses 600 for the liquid crystal monitor are applied. A reference signal for opening and closing the left eye liquid crystal shutter is output and a reference signal for opening and closing the right eye liquid crystal shutter of the liquid crystal shutter glasses 600 for the liquid crystal monitor is output when a low stereoscopic synchronization signal is applied. The reference signal is applied to a common terminal of a left eye liquid crystal shutter driver 530, a right eye liquid crystal shutter driver 550, and a liquid crystal shutter eyeglass 600 for a liquid crystal monitor.

The rising edge detector 520 detects only the rising time of the stereo sync signal applied by the amplifier 510 and applies the signal to the pulse width delay unit 525.

The pulse width delay unit 525 maintains the pulse of the signal applied from the rising edge detector 520 only until the control time by the control signal of the frequency counter 560, and when the control time is completed, the pulse width delay unit 525 is maintained. Initialize and apply to the left eye liquid crystal shutter driver 530.

The falling edge detector 540 detects only the falling time of the stereo sync signal applied by the amplifier 510 and applies the signal to the pulse width delay unit 545.

The pulse width delay unit 545 maintains the pulse of the signal applied from the falling edge detector 540 only until the control time by the control signal of the frequency counter 560, and the pulse width delay unit 545 is completed when the control time is completed. Initialize and apply to the right eye liquid crystal shutter driver 550.

The frequency counter 560 detects the frequency of the stereo-synchronous signal applied from the amplifier 510 to maintain the pulse width during the delay time T of the pulse width delayers 525 and 545 and then delays the pulse width. Initialize the groups 525 and 545.

The delay time is equal to {(1 / stereosynchronous frequency) X St}. Here, St is a specific constant according to the response time of the liquid crystal monitor 200.

The value of the specific constant St is somewhat different depending on the liquid crystal monitor. For a liquid crystal monitor having a response time of 16 mS, it is ideal to set St = 0.355 and 0.345 for a liquid crystal monitor having a 25 mS response time. However, the value of the specific constant (St) is slightly different for each LCD monitor, but it is safe to set the value of St = 0.35 in consideration of the error of the response speed.

The left eye liquid crystal shutter driver 530 receives the output signal of the pulse width delay unit 525 and the liquid crystal drive signal of the liquid crystal shutter drive controller 580, respectively, and displays the left eye screen image on the liquid crystal monitor 200. A signal for opening the liquid crystal by the pulse width of the width retarder 525 and then closing the liquid crystal shutter until the next left eye liquid crystal synchronizing signal is applied is applied to the left eye liquid crystal 610 of the monitor liquid crystal shutter glasses 600.

The right eye liquid crystal shutter driver 550 receives the output signal of the pulse width delay unit 545 and the liquid crystal drive signal of the liquid crystal shutter driving controller 580, respectively, and displays the right eye image on the liquid crystal monitor 200. A signal for opening the liquid crystal by the pulse width of the width retarder 545 and then closing the liquid crystal shutter until the next right eye liquid crystal synchronization signal is applied is applied to the right eye liquid crystal 620 of the liquid crystal shutter glasses 600 for liquid crystal monitor.

Therefore, when the stereoscopic image is displayed on the liquid crystal monitor 200, the user may view the stereoscopic image by wearing the liquid crystal shutter glasses 600 for the liquid crystal monitor.

That is, the liquid crystal shutter glasses 600 for the liquid crystal monitor receive a common left and right liquid crystal shutter signal from the liquid crystal shutter driver 580 and apply the output signal of the left eye liquid crystal shutter driver 530 to the left eye liquid crystal shutter 610. By receiving the output signal of the right eye liquid crystal shutter driver 550 to the right eye liquid crystal shutter 620, the left and right eye images displayed alternately on the liquid crystal monitor 200 can be viewed as a stereoscopic image.

However, since the liquid crystal monitor 200 has an optical structure that emits light polarized through the color filter, the liquid crystal element, and the polarizing film in sequence, the liquid crystal shutter glasses for the liquid crystal monitor ( The liquid crystal shutter of 600 may be manufactured in two ways as follows.

The first method may be manufactured by bonding the light of the image emitted from the liquid crystal monitor 200 to be incident in the order of the polarizing films 611 and 621, the liquid crystal elements 612 and 622, and the polarizing films 613 and 623. The polarization angles of the 611 and 621 and the polarizing films 613 and 623 have a 90 degree difference.

In the second method, as shown in FIG. 4, the light of the image emitted from the liquid crystal monitor 200 may be bonded to be incident on the liquid crystal elements 631 and 641 and the polarizing films 632 and 642 in order.

The first method is similar to the conventional shutter glasses manufacturing method, but in this case, the polarization angle is manufactured to be the same as the polarization angle of light emitted from the liquid crystal monitor when the liquid crystal shutter is manufactured.

The second method is applied when light is polarized and emitted from the liquid crystal monitor 200. The reason for using this method is that when the user wears the liquid crystal shutter glasses manufactured in the same manner as in FIG. 3 with the vertical synchronous signal V that the liquid crystal monitor 200 can receive from the interface 100 up to 75 Hz. The liquid crystal shutter itself is severely flickering, so that the liquid crystal monitor 200 and the surroundings may be severely flickered, but when manufactured in the same way as in FIG. This is because the flickering of the image displayed on the LCD monitor 200 is remarkably improved as well as the flickering around the LCD monitor 200 rather than the liquid crystal shutter of FIG. 3.

That is, the liquid crystal shutter glasses 600 for the liquid crystal monitor should be manufactured in accordance with the optical structure of the liquid crystal monitor 200.

On the other hand, when viewing a stereoscopic image using the liquid crystal monitor 200, the reason that the conventional liquid crystal shutter is not used because the polarization and the wide angle of the light emitted through the polarizing film of the liquid crystal monitor 200 do not coincide with each other. This is because it is not possible to view 3D images by blocking all the light emitted from) or showing the left and right images at the right timing so that they overlap the images.

4. The present invention adopts an infrared communication method so that three-dimensional images can be viewed from a long distance, and for this purpose, an infrared wireless transmitter 700 and a liquid crystal shutter glasses 800 for a liquid crystal monitor are provided.

In FIG. 2, the infrared wireless transmitter 700 includes an infrared modulated signal generator 710, a frequency synthesizer 720, and an infrared emitter 730.

The infrared modulated signal generator 710 generates a modulation frequency required for infrared transmission and applies it to the frequency synthesizer 720.

The frequency synthesizer 720 synthesizes the three-dimensional synchronization signal received from the phase controller 450 of the three-dimensional synchronization signal generator 400 and the modulated signal applied from the infrared modulation signal generator 710 is modulated three-dimensional capable of transmitting infrared rays. Apply a synchronization signal to the infrared emitter 730.

The infrared emitter 730 emits the modulated three-dimensional synchronization signal to the infrared and transmits the infrared liquid crystal shutter glasses 800 for the liquid crystal monitor.

Therefore, the user can watch the image displayed on the liquid crystal monitor 200 as a stereoscopic image by wearing the liquid crystal shutter glasses 800 for the liquid crystal monitor.

In addition, the liquid crystal shutter glasses 800 for the LCD monitor include a battery 810, a DC / DC converter 820, an infrared receiver module 830, a liquid crystal shutter driving control unit 840, and left and right liquid crystals 851 and 862. Including the left and right image to be displayed on the liquid crystal monitor 200 makes it possible to view a stereoscopic image.

The battery 810, the DC / DC converter 820, the infrared receiver module 830, and the liquid crystal shutter driving controller 840 may be mounted on the glasses or on an external receiver.

However, the configuration and operation of the liquid crystal shutter driving controller 840 are identical to those of the liquid crystal shutter driving controller 500, except that the liquid crystal shutter driving controller 840 receives the output signal of the stereoscopic synchronization signal generator 400 from the infrared receiver module 830. Since the operation is different, a description thereof will be omitted.

On the other hand, the present invention comprises a power supply unit 130 is configured to provide operating power.

The power supply unit 130 may receive operating power from a computer or a liquid crystal monitor to supply operating power to each component block.

In addition, a separate power supply device may be provided to supply the corresponding power to the power supply unit 130. That is, the device according to the present invention can be supplied with power from a USB power supply or a keyboard power supply of a computer or a power supply to a VGA card or a separate power supply.

The power supply unit 130 operates as a liquid crystal monitor stereoscopic image control unit 300 and a stereoscopic synchronization signal generating unit 400, a liquid crystal shutter driving control unit 500, an infrared ray transmitting unit 700, and a DC / DC converter 140. Apply power.

The DC / DC converter 140 boosts the power applied from the power supply unit 130 to an operable voltage of the liquid crystal shutter glasses 600 for the liquid crystal monitor and applies it to the liquid crystal shutter driver 500.

On the other hand, each component of the present invention operating as described above can be manufactured in one-chip (microchip) or a microcontroller (MCU), some or all of the components inside the computer VGA card or separate card or monitor inside In addition to being able to be installed in, it can be configured as a separate external device.

Although described above with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and changes to the present invention without departing from the spirit and scope of the invention described in the claims below It will be appreciated.

As described in detail above, the present invention not only recognizes the stereoscopic image displayed on the liquid crystal monitor but also controls the opening and closing of the left and right liquid crystal shutters for recognizing the stereoscopic image based on the stereoscopic synchronization signal. There is an effect that allows the user to watch.                     

That is, in the present invention, when the stereoscopic image displayed on the LCD monitor is viewed, the liquid crystal shutter glasses block the image displayed on the LCD monitor, or the left eye image and the right eye image are overlapped to view the stereoscopic image. By improving problems such as viewing angle and specific resolution support of a dedicated LCD monitor, it is possible to view an efficient three-dimensional image at low cost by using an existing LCD monitor.

In particular, when the present invention is applied, stereoscopic images can be viewed on a display medium displaying a liquid crystal monitor, an organic EL or plasma display, or other images.

Claims (12)

In the stereoscopic image display device using a liquid crystal monitor, A stereoscopic image control unit which alternately displays a left eye image and a right eye image alternately on a screen; A stereo synchronous signal generator for generating a stereo synchronous signal by receiving a stereo signal from the stereo image controller or the SDA terminal; Liquid crystal shutter glasses worn to view a stereoscopic image displayed on the liquid crystal monitor, A stereo sync signal is input to the stereoscopic image controller by inputting the stereo sync signal of the stereo sync signal generator, and the shutter opening and closing of the shutter glasses are synchronized with the left eye image and the right eye image displayed on the LCD monitor. And a liquid crystal shutter driving control unit for transmitting a signal to the liquid crystal shutter eyeglasses. According to claim 1, wherein the stereoscopic image control unit A phase shifter for always converting the vertical synchronization signal V into a positive signal method; A vertical synchronous divider for dividing the signal received from the phase shifter by 1/2; A vertical synchronization delay unit for delaying a signal applied from the phase shifter; A pulse generator for comparing a signal applied from the phase converter with a signal received from a vertical synchronization delay unit and generating a pulse according to the difference value to initialize a horizontal synchronization divider; A horizontal synchronous divider for dividing the horizontal synchronous signal by 1/2; When the output of the vertical synchronous divider is HIGH, the output is synthesized with the odd (1,3,5,7 ...) HIGH signal of the horizontal synchronous divider, A synthesizer synthesized with an even (2,4,6,8 ...) high signal of a horizontal synchronous divider when the output of the vertical synchronous divider is low; A selector for selecting an output signal of the synthesizer so that an analog image signal is selectively outputted to the liquid crystal monitor by receiving a control signal of the liquid crystal shutter driving control unit detecting the stereoscopic synchronization signal; According to the output signal of the selector, in the case of the first image, the image of the odd horizontal line is selected, the image of the even horizontal line is cut off, and in the case of the second image, the image of the even horizontal line is selected and the odd horizontal line is selected. And an analog image selector for outputting a corresponding image to the liquid crystal monitor by blocking an image of the liquid crystal shutter. The method of claim 2, wherein the analog image selector A liquid crystal shutter type stereoscopic image display device comprising an amplifier for compensating for a horizontal line blank image to be darkly displayed on a liquid crystal monitor. The method of claim 1, wherein the three-dimensional synchronization signal generating unit A stereo signal discriminator for detecting a stereo signal included in a signal input to the SDA terminal; A mode discriminator for determining a current mode state by inputting a stereoscopic signal processed by a separate program or a stereoscopic signal from the stereoscopic signal discriminator and outputting a reference signal of the stereoscopic image synchronization signal according to the discrimination; A divider for dividing the vertical synchronization signal phase-converted in the stereoscopic image control unit, And a selector for selecting the stereo sync signal of the divider or the stereo signal discriminator according to the output signal of the mode discriminator and outputting the stereo sync signal to the liquid crystal shutter driving control unit. 5. The liquid crystal shutter type stereoscopic image display device according to claim 4, further comprising a phase controller for outputting the stereo sync signal from the selector to the liquid crystal shutter driving control unit in a phase or inverted phase. The liquid crystal shutter driving control unit of claim 1, wherein A stereo synchronous signal detector which detects only a signal within 20 Hz to 200 Hz of the signals input from the stereo synchronous signal generator to detect a stereo synchronous signal having a certain period and having a 50% duty cycle, and When the stereo sync signal from the stereo sync signal generator is high, a reference signal for opening and closing the left eye liquid crystal shutter of the liquid crystal shutter glasses is output. When the stereo sync signal is low, the right eye liquid crystal shutter of the liquid crystal shutter glasses for the liquid crystal monitor is A liquid crystal shutter driving controller for outputting a reference signal for opening and closing; A rising edge detector for detecting a rise of the stereo sync signal; A falling edge detector for detecting a falling of the stereo sync signal; First and second pulse width delay units for delaying the output signals of the rising and falling edge detectors, respectively; A frequency counter for initializing after maintaining the delay time of the first and second pulse width delay units during the period of the stereo sync signal; A left eye liquid crystal shutter driver which receives a liquid crystal driving signal of the liquid crystal shutter driving controller and opens the left eye liquid crystal of the liquid crystal shutter glasses by the pulse width of the first pulse width retarder; 3D image of the liquid crystal shutter method comprising a right eye liquid crystal shutter driver for receiving the liquid crystal driving signal of the liquid crystal shutter driving controller and opening the right eye liquid crystal of the liquid crystal shutter glasses by the pulse width of the second pulp width delayer. Display device. According to claim 1, wherein the liquid crystal shutter glasses And a polarizing film attached to both sides of the liquid crystal element so as to have the same polarization angle as that of the liquid crystal monitor. According to claim 1, wherein the liquid crystal shutter glasses And a polarizing film attached to one side of the liquid crystal device so as to have the same polarization angle as that of the liquid crystal monitor. The method of claim 1, further comprising an infrared wireless transmission unit for transmitting the stereoscopic synchronization signal from the stereoscopic image synchronization signal generator to a separate liquid crystal shutter glasses in an infrared communication method, so that stereoscopic image viewing is possible at a long distance. LCD shutter type stereoscopic image display device. The method of claim 9, wherein the infrared wireless transmitting unit A liquid crystal shutter type stereoscopic image display device, characterized in that the stereoscopic synchronization signal generation unit transmits the stereoscopic synchronization signal only by the infrared communication method when the liquid crystal shutter driving control unit detects the stereoscopic synchronization signal. The liquid crystal shutter glasses of claim 9, wherein A battery to provide power, A DC / DC converter converting power of the battery into operating power; An infrared receiver module for receiving a transmission signal from the infrared wireless transmitter; And a liquid crystal shutter driving control unit for outputting a signal for synchronizing the left and right liquid crystal shutters with the left eye image and the right eye image displayed on the liquid crystal monitor when a stereo sync signal is detected from the signal received by the infrared receiver module. Liquid crystal shutter type stereoscopic image display device characterized in that. In the method for displaying a stereoscopic image by alternately displaying the left and right images on the LCD monitor, Generating a stereo sync signal by inputting a stereo sync signal included in a video signal or a stereo sync signal input to an SDA terminal; When the vertical sync signal is high, it is synthesized with the odd horizontal sync signal when the vertical sync signal is high, and it is synthesized with the even number horizontal sync signal when the vertical sync signal is Low. To do that, Alternately transmitting and displaying left and right eye images to the LCD monitor based on the stereo sync signal and the synthesized sync signal; And opening and closing the left and right liquid crystal shutters of the liquid crystal shutter glasses according to the high and low of the stereo sync signal to display the image displayed on the liquid crystal monitor as a stereoscopic image. Video display method.

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