CN102162927A - Liquid crystal display system and method for generating stereoscopic image effect by adjusting backlight brightness - Google Patents

Abstract

The invention discloses a liquid crystal display system and a method for generating a stereoscopic image effect by adjusting backlight brightness. When receiving the stereo video signal, the stereo video signal is adjusted to generate a stereo image signal, the time sequence of the stereo image signal is adjusted to generate a liquid crystal driving signal, and then an image picture is generated according to the liquid crystal driving signal. When the image frame is generated, a plurality of backlight blocks are driven according to the ratio generated by the image frame, and the left eye shutter and the right eye shutter of the shutter glasses are switched according to the time generated by the image frame.

Description

Liquid crystal display system and method for generating stereoscopic image effect by adjusting backlight brightness

technical field

The invention relates to a three-dimensional liquid crystal display system and method, in particular to a three-dimensional liquid crystal display system and method for producing a three-dimensional image effect by adjusting the brightness of a backlight.

Background technique

In the display technology of stereoscopic images, shutter glasses are generally used to cooperate with the display to sequentially display the image frames of the left and right eyes, so that the observer can feel the stereoscopic images. However, in the prior art, when the stereoscopic image display displays the conversion process of the left-eye image frame and the right-eye image frame, the observer often sees afterimages. Specifically, this kind of afterimage phenomenon refers to that when an observer observes the stereoscopic image on the liquid crystal display through shutter glasses (shutter glasses), when the left eye shutter of the shutter glasses is opened, the right eye image on the liquid crystal display It has not completely disappeared, so the observer of the liquid crystal display will see the situation of the right eye image; or when the right eye shutter of the shutter glasses is opened, the left eye image of the liquid crystal display has not completely disappeared. And the observer sees the condition of the left-eye video image.

In the prior art, a black frame insertion is used to avoid the above-mentioned afterimage phenomenon. Please refer to FIG. 1 . FIG. 1 is a schematic diagram illustrating a liquid crystal display method with shutter glasses. As shown in FIG. 1 , the display sequentially displays different frames 102 - 116 , which include left-eye image frames 102 and 110 , right-eye image frames 106 and 114 , and black-out frames 104 , 108 , 112 , and 116 . In Figure 1, t _v is the time required for the liquid crystal display to display each frame (frame). The shutter glasses 120 cooperate with the screens 102-116 shown in FIG. 1 to switch the left-eye shutter and the right-eye shutter. As shown in FIG. 1 , when displaying the image frame 102 for the left eye, the shutter glasses 120 open the shutter for the left eye and close the shutter for the right eye, so that the left eye of the observer can see the image frame for the left eye on the liquid crystal display; When displaying the right-eye image frame 106, the shutter glasses 120 open its right-eye shutter and close its left-eye shutter, so that the observer's right eye can see the right-eye image frame on the liquid crystal display; When the eye image frame 110 is displayed, the shutter glasses 120 open the shutter for the left eye and close the shutter for the right eye; when the image frame 114 for the right eye is displayed, the shutter glasses 120 open the shutter for the right eye and close the shutter for the left eye. Synchronously matching the frames 102-116 through the shutter glasses 120 to switch the left-eye shutter and the right-eye shutter allows the observer's left and right eyes to receive images from the left and right eyes respectively, and a stereoscopic image effect is generated under the action of the human brain. However, since the images of the liquid crystal display are not displayed at the same time, the images are changed line by line in a horizontal scanning manner. In order to prevent the left eye from seeing the residual image of the right eye image and causing visual confusion, a blackout image is inserted between the left and right eye images.

However, the prior art also has many disadvantages. For example, adding a blackout frame will cause the observer to perceive an imaging frame rate that is only a quarter of the actual imaging frame rate used by the display. Taking a display with an actual data imaging frame rate of 120Hz as an example, it can only support 30Hz image data. In detail, the frames 102 and 110 separated by four frames are the left-eye image frames; and the frames 106 and 114 separated by four continuous frames are the right-eye image frames.

Contents of the invention

An embodiment of the present invention discloses a liquid crystal display system that adjusts the brightness of the backlight to produce a stereoscopic image effect. The liquid crystal display system includes a stereoscopic image source, a backlight module, a system control board, a liquid crystal drive module, a liquid crystal display module, a backlight drive module and shutter glasses. The stereoscopic image source is used to output stereoscopic video signals; the backlight module includes a plurality of backlight blocks to generate backlight; the system control board is used to generate the first control signal, the second control signal and according to the input The stereoscopic video signal generates a stereoscopic image signal; the liquid crystal drive module is coupled to the system control board for adjusting the timing of the stereoscopic image signal and outputting a liquid crystal drive signal; the liquid crystal display module is arranged on the backlight One side of the module is coupled to the liquid crystal drive module for receiving the liquid crystal drive signal to generate an image frame; the backlight drive module is respectively coupled to the plurality of backlight blocks and is coupled to the system control board , used to control the opening and closing of corresponding blocks of the plurality of backlight blocks according to the first control signal; and the shutter glasses, including a left-eye shutter and a right-eye shutter, used to be turned on and off according to the second control signal closure. The first control signal and the second control signal are related to the ratio of the image frame displayed on the liquid crystal display module.

Another embodiment of the present invention discloses a display method for producing a stereoscopic image effect by adjusting the brightness of the backlight, including receiving a stereoscopic video signal; generating an image frame based on the stereoscopic video signal and displaying it on a liquid crystal display module; displaying the image frame on the liquid crystal display module The ratio on the display module controls the opening and closing of the corresponding blocks of a plurality of backlight blocks; and controls the opening and closing of the left eye shutter and the right eye shutter of the shutter glasses according to the time when the image screen is displayed on the liquid crystal display module closure. When substantially switching the left-eye shutter and the right-eye shutter, all the plurality of backlight blocks are substantially turned off.

Description of drawings

FIG. 1 is a schematic diagram illustrating an implementation method of a three-dimensional liquid crystal display with shutter glasses.

2A is a schematic diagram of the shutter switching time of the left-eye video signal and the right-eye video signal scanned and output by the display with shutter glasses in the first embodiment of the present invention without blacking out the screen.

FIG. 2B is a schematic diagram illustrating separately controlling backlight blocks of the backlight module according to the embodiment of FIG. 2A .

FIG. 3 is a schematic diagram of a liquid crystal display system disclosed by an embodiment of the present invention to adjust the brightness of the backlight to produce a stereoscopic image effect.

FIG. 4 is a schematic diagram of a system control board and a liquid crystal drive module of the liquid crystal display system in FIG. 3 .

FIG. 5 is a flow chart of a display method for generating a stereoscopic image effect by adjusting the brightness of the backlight disclosed in an embodiment of the present invention.

FIG. 6 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to the second embodiment of the present invention.

FIG. 7 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to a third embodiment of the present invention.

FIG. 8 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to a fourth embodiment of the present invention.

FIG. 9 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to a fifth embodiment of the present invention.

FIG. 10 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to the sixth embodiment of the present invention.

Wherein, the reference signs are explained as follows:

102, 110 Left eye image screen

106, 114 Right eye image screen

104, 108, 112, 116 black screen

30 Stereoscopic liquid crystal display system

300 Backlight Module

310 LCD display module

320 Backlight Driver Module

330 LCD driver module

340 System control panel

350, 120 shutter glasses

360 Stereoscopic image source

370 Wireless Signal Transmitter

380 Wireless Signal Receiver

3302 Low Voltage Differential Signal Receiver

3304 ASIC

3306 LCD driver

3402 Converting Minimum Differential Signal Receiver

3404 Analog-to-Digital Converter

3406 NTSC/PAL decoder

3407 ATSC Decoder

3408 Scaling Engine

3410 Synchronous Dynamic Memory

3412 Low Voltage Differential Signal Transmitter

202-234, 602-628, 702-720, 802-828, screen

902-926, 1002-1026

R0_1, R0_2, R0_3, R0_4, R0_5, right eye image

R0_6, R0_7, R0_8, R1_1, R1_2,

R1_3, R1_4, R1_5

L0_1, L_02, L_03, L_04, L_05, left eye images

L_06, L_07, L_08

50-62 Steps

Gt shutter glasses are used to switch between the left and right eye shutters

time

Detailed ways

Please refer to FIG. 2A, which shows a liquid crystal display according to a first embodiment of the present invention. The liquid crystal display is matched with the shutter switching time of the shutter glasses, and sequentially scans and outputs left-eye image frames and right-eye image frames. As shown in Figure 2A, when this liquid crystal display is outputting a stereoscopic image, it does not output a black-out frame. In Figure 2A, _tv is the time required for the liquid crystal display to display each frame, that is, the imaging frame rate of the liquid crystal display ( frame rate). G _t represents the time for the shutter glasses to switch between the left and right eye shutters. The current shutter glasses use liquid crystal technology, and G _t takes about 2ms. Taking a display with an imaging frame rate of 120Hz as an example, it takes about t _v to display each screen. a quarter of.

As shown in FIG. 2A , this paper takes the time t ₀ -t _v as an example to illustrate the scanning process of the left-eye video signal on the liquid crystal display. When at time _t0 , the first right-eye image frame is displayed on the liquid crystal display, as shown in frame 202, and at this time, sequential progressive scanning is started to display the first left-eye image frame (as shown in frames 202-210) . At time t _v , the first left-eye video signal has been scanned, and the first left-eye video frame is displayed on the LCD, as shown in frame 210 .

Then the liquid crystal display gradually scans and outputs the second right-eye video signal (corresponding to frames 210-218), wherein the frame 218 is the displayed second right-eye image frame. Then the liquid crystal display gradually scans and outputs the second left-eye video signal (corresponding to the frames 218-226), wherein the frame 226 is the displayed second left-eye image frame. Next, the liquid crystal display gradually scans and outputs the third right-eye video signal (corresponding to frames 226-234), wherein the frame 234 is the displayed third right-eye image frame.

In the process of scanning frames 204 to 210 (time t ₁ -t _v ), the shutter glasses open their left eye shutter and close their right eye shutter, but frames 204, 206 and 208 all contain part of the left eye image frame and Part of the right-eye image, although the shutter glasses only open the left-eye shutter at this time, because the screen contains part of the right-eye image, it will cause the user's left eye to see part of the right-eye image, causing confusion.

Please refer to FIG. 2B . FIG. 2B is a schematic diagram illustrating separately controlling the backlight blocks of the backlight module according to the embodiment of FIG. 2A . When the backlight module of the liquid crystal display is divided into four separately controlled backlight blocks, at time _t0 , the liquid crystal display will substantially turn off all the backlight blocks of the backlight module; at time _t1 , the liquid crystal display will only The top two backlight blocks of the backlight module will be turned on substantially; at time _t2 , the liquid crystal display will only substantially turn on the top three backlight blocks of the backlight module; at time _t3 , the liquid crystal display will turn on All the backlight blocks of the backlight module are substantially turned on; at time _tv , the liquid crystal display will substantially turn off all the backlight blocks of the backlight module. Therefore, in the process of scanning the pictures 202 to 204, 210 to 212, 218 to 220, and 226 to 228, the shutter glasses switch between the left and right eye shutters, and by essentially turning off all the backlight blocks of the backlight module, the blurring in the picture can be avoided. The image for the left eye and the image for the right eye interfere with the visual experience of the user. In addition, in the process of scanning frames 210 to 218, frames 218 to 226, and frames 226 to 234, the backlight module will be repeatedly controlled in this way, so as to prevent the left eye from being disturbed by the right eye image and prevent the right eye from being disturbed. Disturbance of left eye image.

Please refer to FIG. 3 and FIG. 4 . FIG. 3 is a schematic diagram of a liquid crystal display system 30 for producing a stereoscopic image effect by adjusting the brightness of the backlight according to an embodiment of the present invention. The three-dimensional liquid crystal display system 30 includes a backlight module 300, a liquid crystal display module 310, a backlight driver module 320, a liquid crystal driver module 330, a system control board 340, shutter glasses 350, a stereoscopic image source 360, a wireless signal transmitter 370 and a wireless signal receiver 380 . FIG. 4 is a schematic diagram of the system control board 340 and the liquid crystal driving module 330 of the liquid crystal display system 30 . The system control board 340 includes a Transition Minimum Differential Signal (TMDS) receiver 3402, an analog-to-digital converter (ADC) 3404, a digital/analog tuner 3405 including an NTSC/PAL decoder 3406 and an ATSC decoder 3407, a scaling engine 3408 , synchronous dynamic memory 3410 and low voltage differential signaling (LVDS) transmitter 3412 . The LCD driver module 330 includes a low voltage differential signaling (LVDS) receiver 3302 , an ASIC 3304 and a LCD driver 3306 .

The stereoscopic image source 360 is used to output stereoscopic video signals; the backlight module 300 includes a plurality of backlight blocks 390, and the backlight module 300 can locally control the plurality of backlight blocks 390; the backlight module 300 can be a light emitting diode (LED) backlight module or has A backlight module with a plurality of cold cathode tubes (CCFL), but the present invention is not limited thereto, as long as the backlight module that can locally control the backlight block falls within the scope of the present invention. The system control board 340 is coupled to the backlight driving module 320 and the liquid crystal driving module 330 ; the system control board 340 outputs a first control signal to the backlight driving module 320 and a second control signal to the wireless signal transmitter 370 .

When the stereoscopic image source 360 transmits the stereoscopic video signal to the system control board 340, the transition minimum differential signal (TMDS) receiver 3402 in the system control board 340 is responsible for receiving the digital signal in the stereoscopic video signal and transmitting the stereoscopic video signal. Audio signals, video signals, and various auxiliary data in the signal; the analog-to-digital converter (ADC) 3404 is responsible for receiving the signals of the analog RGB three primary colors in the stereoscopic video signal; the scaling engine 3408 is coupled to convert the minimum differential signal (TMDS ) receiver 3402, analog-to-digital converter (ADC) 3404, NTSC/PAL decoder 3406 and ATSC decoder 3407, responsible for adjusting the converted minimum differential signal (TMDS) receiver 3402, analog-to-digital converter (ADC) 3404, NTSC/PAL decoder 3406 and/or ATSC decoder 3407 adjust color, adjust brightness, adjust resolution and/or adjust contrast and other processed stereoscopic video signals; synchronous dynamic memory 3410, coupled to the scaling engine 3408, responsible for temporarily storing the stereoscopic video signal adjusted by the scaling engine 3408; a low-voltage differential signal (LVDS) transmitter 3412, coupled to the scaling engine 3408 and the LCD driver module 330, responsible for adjusting the stereoscopic video signal adjusted by the scaling engine 3408 The video signal is converted into a stereoscopic image signal and the stereoscopic image signal is output to the liquid crystal driving module 330 . In addition, the system control board 340 also has the function of an on-screen video control system (On-Screen Display, OSD), allowing the user to adjust the display range, brightness and other functions of the liquid crystal display module 310 .

The liquid crystal drive module 330 is coupled to the liquid crystal display module 310 and the system control board 340, and the low voltage differential signal (LVDS) receiver 3302 is coupled to the low voltage differential signal transmitter 3412 to receive the stereoscopic image signal; ASIC 3304, coupled to the low-voltage differential signal receiver 3302, for adjusting the timing of the stereoscopic image signal; the liquid crystal driver 3306, coupled to the ASIC 3304, for adjusting the timing of the stereoscopic image according to the ASIC 3304 The signal generates a liquid crystal driving signal and outputs the liquid crystal driving signal to the liquid crystal display module 310 . The liquid crystal display module 310 generates corresponding image frames according to the liquid crystal driving signal received from the liquid crystal driving module 330 . The backlight driving module 320 is respectively coupled to the plurality of backlight blocks 390 and to the system control board 340, and drives the plurality of backlight blocks 390 step by step according to the first control signal. In FIG. 3 , the shutter glasses 350 can receive a second control signal from the wireless signal transmitter 370 coupled to the system control board 340 via the wireless signal receiver 380, and control the left-eye shutter and the right-eye shutter according to the second control signal. The opening and closing of the wireless signal transmitter 370 and the wireless signal receiver 380, wherein the wireless transmission mode between the wireless signal transmitter 370 and the wireless signal receiver 380 is Bluetooth (Bluetooth) wireless transmission mode, wireless fidelity (WIFI) mode, infrared (IR) or other wireless transmission mode . In addition, the stereoscopic image source 360 is a computer, a DVD player or other image sources capable of sending out stereoscopic video signals.

In addition, the present invention mentions that the backlight module 300 and the backlight block 390 of the backlight module 300 are substantially turned off or turned on substantially, wherein the brightness of the backlight block 390 including the backlight module 300 is substantially turned off, and the brightness reduction (that is, from bright to dark ), and/or turn off the backlight block 390 of the backlight module 300; substantially turn on the brightness of the backlight block 390 including the backlight module 300 (ie from dark to bright), and/or turn on the backlight of the backlight module 300 Block 390. In more detail, for example, the backlight module 300 can be a backlight module with a plurality of cold cathode tubes (CCFL), and the system control board 340 can send one or more control signals, such as pulse width modulation (Pulse Width Modulation, PWM) The signal is used to control the brightness of the backlight block 390 , or to actually turn on or turn off the backlight block 390 . Alternatively, the backlight module 300 can be a backlight module with a plurality of light-emitting diodes (LEDs), and the system control board 340 can send one or more control signals to control the brightness of the backlight block 390, or to actually turn on or off the backlight Block 390.

FIG. 5 is a flow chart of a display method for generating a stereoscopic image effect by adjusting the brightness of the backlight disclosed in an embodiment of the present invention. The steps of the method of FIG. 5 are detailed as follows:

Step 50: the system control board 340 receives the stereoscopic video signal via the stereoscopic image source 360;

Step 52: The system control board 340 adjusts the stereoscopic video signal to generate a stereoscopic image signal;

Step 54: The liquid crystal driving module 330 generates a liquid crystal driving signal according to the stereoscopic image signal;

Step 56: The liquid crystal display module 310 generates an image frame according to the liquid crystal driving signal;

Step 58: The backlight driving module 320 controls the opening and closing of the corresponding blocks of the plurality of backlight blocks 390 through the first control signal according to the ratio of the image frame displayed on the liquid crystal display module 310; and

Step 60 : According to the time when the image frame is displayed on the liquid crystal display module 310 , control the opening and closing of the left-eye shutter and the right-eye shutter of the shutter glasses 350 through the second control signal.

The method in FIG. 5 may further include a step of generating a second control signal according to the vertical synchronous signal of the liquid crystal display module 310 , and the period of the vertical synchronous signal of the liquid crystal display module 310 is the same as that of the second control signal. In this case, the first control signal is generated according to the second control signal. By synchronizing the first control signal with the second control signal, all the backlight blocks 390 can be turned off substantially when the left eye shutter and the right eye shutter of the shutter glasses 350 are substantially switched.

The method in FIG. 5 will be described below using five embodiments with different first control signals in conjunction with the three-dimensional liquid crystal display system 30 shown in FIG. 3 .

FIG. 6 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to a second embodiment of the present invention. In the embodiment of FIG. 6 , the backlight module 300 includes seven individually controllable backlight blocks 390 , but the second embodiment of the present invention is not limited to being divided into seven individually controllable backlight blocks. Assume that the shutter eye shutter switching time is slightly less than 1/7 of the imaging frame rate. At time t ₀ , the right-eye image frame is completely displayed on the liquid crystal display module 310 , the right-eye shutter of the shutter glasses 350 is opened, the left-eye shutter is closed, and the frame 602 displays the right-eye images R0_1 - R0_7 . At this time, the first control signal will substantially turn on seven backlight blocks 390 , corresponding to the right-eye images R0_1 - R0_7 respectively. Immediately afterwards, the liquid crystal driving signal corresponding to the left-eye image starts to be scanned and output on the liquid crystal display module 310 , and at time _t1 , a picture 604 as shown in FIG. 6 is displayed on the liquid crystal display module 310 . That is, the area corresponding to the uppermost backlight block 390 among the seven backlight blocks 390 will complete displaying the left-eye image L0_1, and the area corresponding to the other six backlight blocks 390 will still display the right-eye images R0_2˜R0_7 . Since the right-eye shutter is still open at this time, in order to avoid the interference of the left-eye image L0_1 to the right eye, the first control signal will only substantially turn off the uppermost backlight block 390 among the seven backlight blocks 390, so that the right The left-eye image L0_1 can't be seen substantially by the eye, but the right-eye images R0_2-R0_7 can still be seen.

When the time is _t2 , the liquid crystal display module 310 will display the image 606, in other words, the area corresponding to the top two backlight blocks 390 among the seven backlight blocks 390 will complete displaying the left-eye images L0_1-L0_2, and the corresponding The right-eye images R0_3-R0_7 are still displayed in the area of the other five backlight blocks 390. Since the right-eye shutter is still open at this time, in order to avoid the interference of the left-eye images L0_1-L0_2 to the right eye, the first control signal only The top two backlight blocks 390 among the seven backlight blocks 390 are substantially turned off, so that the right eye cannot see the left-eye images L0_1-L0_2 substantially, but can still see the right-eye images R0_3-R0_7. By analogy, when the times are t3, t4, and t5, the first control signal only makes the top 3, 4, and 5 backlight blocks 390 of the 7 backlight blocks 390 substantially closed, so that the right eye only You will see the right eye images R0_4~R0_7, R0_5~R0_7, R0_6~R0_7.

When the time is _t6 , the liquid crystal display module 310 will display the frame 614, in other words, the area corresponding to the top six backlight blocks 390 among the seven backlight blocks 390 will complete displaying the left-eye images L0_1˜L0_6. When the time interval is _t6 - _t7 , the shutter glasses are switched to close the shutter for the right eye and open the shutter for the left eye. Therefore, when the time is _t6 , the first control signal will make all the 7 backlight blocks 390 substantially closure. However, according to another embodiment of the present invention, the switching time of the shutter glasses will be longer, for example _, the switching starts between time _t5 and _t6 , so the first control signal can also make 7 All of the backlight blocks 390 are substantially turned off.

At time _t7 , the shutter glasses have been switched, so the right-eye shutter is closed, the left-eye shutter is open, and the left-eye images L0_1-L0_7 are displayed in the frame 616 corresponding to the seven backlight blocks 390, because the left-eye shutter It is turned on, so the first control signal will actually turn on the seven backlight blocks 390 ; at this time, the liquid crystal driving signal corresponding to the right-eye image starts to be input into the liquid crystal display module 310 . As for the control method for time t ₈ -t ₁₃ , it is the same as the control method for time t ₁ -t ₆ , except that the left and right eyes are swapped, so no more details are given here.

FIG. 7 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to a third embodiment of the present invention. In the embodiment of FIG. 7 , the backlight module 300 includes seven individually controllable backlight blocks 390 , but the third embodiment of the present invention is not limited to being divided into seven individually controllable backlight blocks. At time _t0 , the screen 702 displays the right-eye images R0_1-R0_7 corresponding to the seven backlight blocks 390. At this time, the liquid crystal drive signal corresponding to the left-eye image screen starts to be input to the liquid crystal display module 310. In order to avoid If the input left-eye image is disturbed, the shutter glasses 350 will start to switch between time _t0 and _t1 , so that the right-eye shutter is closed and the left-eye shutter is opened. At time _t1 , the shutter glasses 350 are just in the switching process, and at this time the first control signal will substantially turn off the seven backlight blocks 390, as shown in the screen 704, so as to avoid disturbing the user's visual experience.

At time _t2 , the liquid crystal display module 310 will display the image 706, in other words, the area corresponding to the uppermost two backlight blocks 390 among the seven backlight blocks 390 will complete displaying the left-eye images L0_1-L0_2, and corresponding to The area of the other five backlight blocks 390 will still display the right-eye images R0_3-R0_7. Since the right-eye shutter is closed at this time, in order to avoid the interference of the right-eye images R0_3-R0_7 to the left eye, the first control signal will make the 7 Among the backlight blocks 390, the uppermost two backlight blocks 390 are substantially turned on, and the bottom five backlight blocks 390 are substantially turned off, so that the left eye cannot see the right eye images R0_3～R0_7 substantially, and still You will see images L0_1~L0_2 for the left eye. When the time is _t3 , the liquid crystal display module 310 will display the image 708, in other words, the area corresponding to the top three backlight blocks 390 among the seven backlight blocks 390 will complete displaying the left-eye images L0_1-L0_3, and the corresponding Right-eye images R0_4-R0_7 will still be displayed in the area of the other four backlight blocks 390. Since the right-eye shutter is closed at this time, in order to avoid the right-eye images R0_4-R0_7 from interfering with the left eye, the first control signal will The bottom four backlight blocks 390 among the seven backlight blocks 390 are substantially turned off, so that the left eye can not see the right-eye images R0_4 - R0_7 substantially, but can still see the left-eye images L0_1 - L0_3 . By analogy, when the time is t ₄ , t ₅ , and t ₆ , the first control signal will only substantially turn off the lowermost 3, 2, and 1 backlight blocks 390 among the 7 backlight blocks 390, so that The left eye only sees the left-eye images L0_1-L0_4, L0_1-L0_5, and L0_1-L0_6. When the time is _t7 , the first control signal turns on all the seven backlight blocks 390 substantially, so that the left eye can see the left-eye images L0_1˜L0_7.

The shutter glasses 350 will start switching between time _t7 and _t8 , so that the shutter for the right eye is opened and the shutter for the left eye is closed. At time _t8 , the shutter glasses 350 are just in the switching process, and at this time the first control signal will substantially turn off the seven backlight blocks 390, as shown in the screen 718, so as to avoid disturbing the user's visual experience. As for the control method at time _t9 , it is the same as the control method at time _t2 , except that the left and right eyes are swapped, so no more details will be given here.

FIG. 8 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to a fourth embodiment of the present invention. In the embodiment of FIG. 8 , the backlight module 300 includes 8 individually controllable backlight blocks 390 , but the fourth embodiment of the present invention is not limited to being divided into 8 individually controllable backlight blocks. At time _t0 , the right eye shutter of the shutter glasses 350 is opened, and the left eye shutter is closed, and the image 802 corresponding to the range of the eight backlight blocks 390 displays right eye images R0_1-R0_8. Since the right eye shutter is in an open state, Therefore, the first control signal will actually turn on the eight backlight blocks 390; at this time, the liquid crystal drive signal corresponding to the image for the left eye starts to be input into the liquid crystal display module 310, and when the time is _t1 , the picture 804 will be displayed on the liquid crystal display On the module 310, in other words, the area corresponding to the uppermost backlight block 390 among the eight backlight blocks 390 will complete displaying the left-eye image L0_1, but the area corresponding to the other seven backlight blocks 390 will still display the right-eye image R0_2-R0_8, since the shutter for the right eye is still open at this time, in order to avoid the interference of the left-eye image L0_1 to the right eye, the first control signal only substantially turns off the uppermost backlight block 390 among the eight backlight blocks 390 , so that the right eye can not see the left-eye image L0_1 substantially, but can still see the right-eye images R0_2˜R0_8.

When the time is _t2 , the liquid crystal display module 310 will display the image 806, in other words, the area corresponding to the top two backlight blocks 390 among the eight backlight blocks 390 will complete displaying the left-eye images L0_1-L0_2, and then the corresponding The right-eye images R0_3-R0_8 are still displayed in the area of the other six backlight blocks 390. Since the right-eye shutter is still open at this time, in order to avoid the interference of the left-eye images L0_1-L0_2 to the right eye, the first control signal only The uppermost two backlight blocks 390 among the eight backlight blocks 390 are substantially turned off, so that the right eye cannot see the left-eye images L0_1-L0_2 substantially, but can still see the right-eye images R0_3-R0_8. By analogy, at time _t3 , the first control signal will only substantially turn off the top three backlight blocks 390 among the eight backlight blocks 390, so that the right eye can only see the right eye image R0_4 ~R0_8.

When the time is _t4 , the liquid crystal display module 310 will display the image 810, in other words, the area corresponding to the uppermost 4 backlight blocks 390 of the 8 backlight blocks 390 will complete displaying the left-eye images L0_1-L0_4, and the shutter glasses The 350 will start to switch between time _t3 and _t4 , and the shutter glasses 350 can also start to switch at time _t4 , so that the shutter for the right eye is closed and the shutter for the left eye is opened. At time _t4 , the shutter glasses 350 are just in the process of switching or entering into the switching state. At this moment, the first control signal will cause all the eight backlight blocks 390 to be substantially turned off, as shown in the screen 810, so as to avoid the image of the left eye Interfere with the user's visual experience with the right eye image.

When the time is _t5 , the liquid crystal display module 310 will display the picture 812, and the area corresponding to the top five backlight blocks 390 in the eight backlight blocks 390 will complete displaying the left-eye images L0_1-L0_5, and the range corresponding to the other The range of the three backlight blocks 390 will still display the right-eye images R0_6-R0_8. Since the right-eye shutter is closed and the left-eye shutter is open, in order to avoid the interference of the right-eye images R0_6-R0_8 to the left eye, the first A control signal will substantially turn off the bottom three backlight blocks 390 among the eight backlight blocks 390, so that the left eye can not see the right eye images R0_6-R0_8 substantially, but still can see the left eye image L0_1 ~L0_5. When the time is _t6 , the liquid crystal display module 310 will display the image 814, in other words, the area corresponding to the top six backlight blocks 390 in the eight backlight blocks 390 will complete displaying the left-eye images L0_1-L0_6, and the corresponding The right-eye images R0_7-R0_8 are still displayed in the area of the other two backlight blocks 390. Since the right-eye shutter is closed and the left-eye shutter is open at this time, in order to avoid the interference of the right-eye images R0_7-R0_8 to the left eye , the first control signal will substantially turn off the bottom two backlight blocks 390 among the eight backlight blocks 390, so that the left eye can not see the right eye images R0_7-R0_8 substantially, but still can see the left eye Image L0_1～L0_6. By analogy, at time _t7 , the first control signal will only substantially turn off the bottom one of the eight backlight blocks 390, so that the left eye can only see the left-eye images L0_1˜ L0_7; when the time is _t8 , the first control signal turns on all the eight backlight blocks 390 substantially, so that the left eye only sees the left-eye images L0_1˜L0_8. As for the control method for the time _t9 - _t13 , it is the same as the control method for the time _t1 - _t5 , except that the left and right eyes are swapped, so no more details are given here.

FIG. 9 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to a fifth embodiment of the present invention. The difference between the embodiment of FIG. 9 and the embodiment of FIG. 8 is that in the embodiment of FIG. 9 , the backlight module 300 includes 7 backlight blocks 390 that can be individually controlled instead of 8 backlight blocks 390 that can be individually controlled.

FIG. 10 is a schematic diagram illustrating the method of FIG. 5 on the time axis according to a sixth embodiment of the present invention. The difference between the embodiment of FIG. 10 and the embodiment of FIG. 9 is that in the embodiment of FIG. 10, the switching time of the shutter glasses 350 is earlier than that of the embodiment of FIG. 9, so in the fifth embodiment of FIG. , the picture displayed by the liquid crystal display module 310 will appear darker at the top of the picture and brighter at the bottom; and in the sixth embodiment of FIG. dark situation.

Based on the above, in the embodiments shown in FIG. 6 , FIG. 7 , FIG. 8 , FIG. 9 and FIG. 10 , the backlight driving module 320 gradually drives a plurality of backlight blocks 390 according to the first control signal, and controls the shutters according to the second control signal. Opening and closing of the left-eye shutter and the right-eye shutter of the glasses 350 . In this way, the present invention can effectively prevent the user's left eye from being disturbed by the right eye image and prevent the right eye from being disturbed by the left eye image under the premise of not needing to cover the black screen. backlight block 390 to achieve the purpose of energy saving.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (20)

1. the liquid crystal display systems with adjustment backlight illumination generation stereopsis effect comprises

The stereopsis source is in order to the output stereo video signals;

Backlight module comprises a plurality of blocks backlight, and is backlight in order to produce;

System control panel is in order to produce first control signal, second control signal and according to this stereo video signals of input, to produce stereoscopic image signals;

Liquid crystal driver module is coupled to this system control panel, in order to this stereoscopic image signals being done the adjustment on the sequential, and the output liquid crystal driving signal; And

LCD MODULE is located at a side of this backlight module and is coupled to this liquid crystal driver module, in order to receiving this liquid crystal driving signal, and produces image frame;

This liquid crystal display systems is characterised in that also and comprises:

The backlight drive module is respectively coupled to this a plurality of blocks backlight, and is coupled to this system control panel, in order to according to this first control signal, control a plurality of blocks backlight corresponding block unlatching and close; And

Shutter glasses comprises left eye shutter and right eye shutter, in order to be unlocked according to this second control signal and to close;

Wherein this first control signal and this second control signal are relevant with the ratio that this image frame is presented on this LCD MODULE.

2. liquid crystal display systems as claimed in claim 1 is characterized in that, this system control panel also comprises:

Zooming engine is in order to receive and to handle this stereo video signals;

Synchronous dynamic RAM is coupled to this zooming engine, in order to keep in by the adjusted stereo video signals of this zooming engine; And

The Low Voltage Differential Signal transmitter is coupled to this zooming engine and this liquid crystal driver module, in order to being converted to this stereoscopic image signals by the adjusted stereo video signals of this zooming engine.

3. liquid crystal display systems as claimed in claim 2 is characterized in that, this liquid crystal driver module also comprises:

Low voltage differential signal receiver is coupled to this Low Voltage Differential Signal transmitter, in order to receive this stereoscopic image signals;

Special IC is coupled to this low voltage differential signal receiver, in order to adjust the sequential of this stereoscopic image signals; And

Liquid crystal driver is coupled to this special IC, in order to produce this liquid crystal driving signal according to the stereoscopic image signals of being adjusted by this special IC after sequential.

4. liquid crystal display systems as claimed in claim 1 is characterized in that, this liquid crystal display systems also comprises:

Wireless signal transmitter is coupled to this system control panel, and wireless signal receiver, is coupled to this shutter glasses, in order to the signal of switching time of receiving this shutter glasses of control that is transmitted by this wireless signal transmitter.

5. one kind to adjust the display packing that backlight illumination produces the stereopsis effect, comprises:

Receive stereo video signals; And

Produce image frame on LCD MODULE according to this stereo video signals;

The method is characterized in that also and comprise:

Be presented at ratio on this LCD MODULE according to this image frame, control a plurality of blocks backlight corresponding block unlatching and close; And

Be presented at time on this LCD MODULE according to this image frame, the left eye shutter of control shutter glasses and the unlatching of right eye shutter and close;

Wherein when switching this left eye shutter and this right eye shutter in fact, these a plurality of blocks backlight are all closed in fact.

6. method as claimed in claim 5, it is characterized in that, these a plurality of blocks backlight comprise N block backlight, and are presented at ratio on this LCD MODULE according to this image frame, and the unlatching and closing also of controlling the corresponding block of these a plurality of blocks backlight comprises:

When this LCD MODULE is exported (k-1)/N right-eye image picture, k block backlight of this N block backlight opened in fact; And

When this LCD MODULE is exported this right-eye image picture fully, close this N block backlight in fact;

N 〉=k 〉=2 wherein.

7. method as claimed in claim 6 is characterized in that, is presented at time on this LCD MODULE according to this image frame, controls the unlatching of the left eye shutter of this shutter glasses and right eye shutter and close also to comprise:

When this LCD MODULE is exported this right-eye image picture fully, control this shutter glasses and begin to switch, opening this left eye shutter, and close this right eye shutter.

8. method as claimed in claim 5, it is characterized in that, these a plurality of blocks backlight comprise N block backlight, and are presented at ratio on this LCD MODULE according to this image frame, and the unlatching and closing also of controlling the corresponding block of these a plurality of blocks backlight comprises:

When this LCD MODULE has been exported k/N right-eye image picture, k block backlight of this N block backlight closed in fact;

When this LCD MODULE is exported (N-1)/N this right-eye image picture, this N block backlight closed in fact; And

When this LCD MODULE is exported this right-eye image picture fully, open this N block backlight in fact;

(N-2) 〉=k 〉=1 wherein.

9. method as claimed in claim 8 is characterized in that, is presented at time on this LCD MODULE according to this image frame, controls the unlatching of the left eye shutter of this shutter glasses and right eye shutter and close also to comprise:

When this right-eye image picture begins to export, make this right eye shutter close, and make this left eye shutter opening.

10. method as claimed in claim 5, it is characterized in that, these a plurality of blocks backlight comprise N block backlight, and are presented at ratio on this LCD MODULE according to this image frame, and the unlatching and closing also of controlling the corresponding block of these a plurality of blocks backlight comprises:

When this LCD MODULE has been exported 1/N right-eye image picture, close this N block backlight in fact; And

When this LCD MODULE has been exported k/N this right-eye image picture, k block backlight of this N block backlight opened in fact;

N 〉=k 〉=2 wherein.

11. method as claimed in claim 10 is characterized in that, is presented at time on this LCD MODULE according to this image frame, controls the unlatching of the left eye shutter of this shutter glasses and right eye shutter and close also to comprise:

Export this right-eye image picture to the time of having exported 1/N this right-eye image picture at this liquid crystal display mode BOB(beginning of block), control this shutter glasses and begin to switch, opening this right eye shutter, and close this left eye shutter.

12. method as claimed in claim 5, it is characterized in that, these a plurality of blocks backlight comprise N block backlight, and are presented at ratio on this LCD MODULE according to this image frame, and the unlatching and closing also of controlling the corresponding block of these a plurality of blocks backlight comprises:

When this LCD MODULE is exported (N-2i)/2N right-eye image picture, (N/2-i) individual block backlight of this N block backlight is closed in fact;

When this LCD MODULE has been exported 1/2 this right-eye image picture, this N block backlight closed in fact; And

When this LCD MODULE is exported (N+2j)/2N this right-eye image picture, (j+N/2) individual block backlight of this N block backlight is opened in fact;

(N/2-i) 〉=i 〉=1 wherein, N/2 〉=j 〉=1.

13. method as claimed in claim 12 is characterized in that, is presented at time on this LCD MODULE according to this image frame, controls the unlatching of the left eye shutter of this shutter glasses and right eye shutter and close also to comprise:

When this LCD MODULE was exported (N-2)/2N this right-eye image picture in fact, this second control signal was controlled this shutter glasses and is begun to switch, and opening this right eye shutter, and closed this left eye shutter.

14. method as claimed in claim 5, it is characterized in that, these a plurality of blocks backlight comprise N block backlight, and are presented at ratio on this LCD MODULE according to this image frame, and the unlatching and closing also of controlling the corresponding block of these a plurality of blocks backlight comprises:

When this LCD MODULE has been exported i/N right-eye image picture, i block backlight of this N block backlight closed in fact;

When this LCD MODULE is exported (N+1)/2N this right-eye image picture, this N block backlight closed in fact; And

When this LCD MODULE has been exported j/N this right-eye image picture, this j block backlight opened in fact;

(N-1)/2 〉=i 〉=1 wherein, N 〉=j 〉=(N+3)/2.

15. method as claimed in claim 14 is characterized in that, is presented at time on this LCD MODULE according to this image frame, controls the unlatching of the left eye shutter of this shutter glasses and right eye shutter and close also to comprise:

When this LCD MODULE was exported (N-1)/2N this right-eye image picture in fact, this second control signal was controlled this shutter glasses and is begun to switch, and opening this right eye shutter, and closed this left eye shutter.

16. method as claimed in claim 5, it is characterized in that, these a plurality of blocks backlight comprise N block backlight, and are presented at ratio on this LCD MODULE according to this image frame, and the unlatching and closing also of controlling the corresponding block of these a plurality of blocks backlight comprises:

When this LCD MODULE has been exported i/N right-eye image picture, i block backlight of this N block backlight closed in fact;

When this LCD MODULE is exported (N-1)/2N this right-eye image picture, this N block backlight closed in fact; And

When this LCD MODULE has been exported j/N this right-eye image picture, this j block backlight opened in fact;

(N-3)/2 〉=i 〉=1 wherein, N 〉=j 〉=(N+1)/2.

17. method as claimed in claim 16 is characterized in that, is presented at time on this LCD MODULE according to this image frame, controls the unlatching of the left eye shutter of this shutter glasses and right eye shutter and close also to comprise:

When this LCD MODULE was exported (N-3)/2N this right-eye image picture in fact, this second control signal was controlled this shutter glasses and is begun to switch, and opening this right eye shutter, and closed this left eye shutter.

18. method as claimed in claim 5, it is characterized in that, be presented at ratio on this LCD MODULE according to this image frame, control these a plurality of blocks backlight corresponding block unlatching and to close be to be presented at ratio on this LCD MODULE according to this image frame, periodically control these a plurality of blocks backlight corresponding block unlatching and close; Be presented at time on this LCD MODULE according to this image frame, controlling the unlatching of the left eye shutter of this shutter glasses and right eye shutter and closing is to be presented at time on this LCD MODULE according to this image frame, periodically controls the unlatching of the left eye shutter of this shutter glasses and right eye shutter and closes.

19. method as claimed in claim 5 is characterized in that, controls the unlatching of this left eye shutter of this shutter glasses and this right eye shutter and close also to comprise:

When opening this left eye shutter, close this right eye shutter, and when opening this right eye shutter, close this left eye shutter.

20. method as claimed in claim 5 is characterized in that, this method also comprises and alternately produces left eye vision signal and right eye vision signal to form this stereo video signals.

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