WO2012031387A1

WO2012031387A1 - Three dimensional image displaying method, system, three dimensional television and glasses

Info

Publication number: WO2012031387A1
Application number: PCT/CN2010/076702
Authority: WO
Inventors: 刘卫东; 乔明胜; 陈兴锋; 黄国鹏
Original assignee: 青岛海信信芯科技有限公司
Priority date: 2010-09-08
Filing date: 2010-09-08
Publication date: 2012-03-15
Also published as: CN102612838B; CN102612838A

Abstract

A three dimensional (3D) image displaying method, a system, a 3D television and glasses are disclosed, wherein the three dimensional image displaying method includes: extracting a synchronous control signal from a 3D image signal, and generating a corresponding backlight drive signal; according to the backlight drive signal, when one or more regions in N regions, which are equally divided along the row direction in a liquid crystal display screen, complete a refresh response to current image field data of the left or right eye, controlling backlight regions corresponding to one or more regions to be illumined, and then to be turned off in a preset time range before the backlight regions are illumined; wherein, in the preset time range corresponding to any one backlight region is illumined, controlling the corresponding liquid crystal display screen region to only complete outputting of the image field data of the corresponding left or right eye.

Description

3D image display method, system, 3D television and glasses

The present invention relates to the field of liquid crystal televisions, and in particular, to a 3D image display method, system, 3D television, and glasses.

Background technique

The basic principle for realizing 3D display is to transmit two images with small parallax to the left and right eyes through optical or circuit processing, and do not interfere with each other, thereby forming a stereoscopic feeling under the synthesis of the cerebral cortex.

At present, 3D display technology can be divided into two types: glasses type and eye type. Among them, the mirror type 3D technology includes: color difference type 3D technology, polarized type 3D technology, and active shutter type 3D technology.

Taking the active shutter type 3D technology as an example, the 3D effect is mainly achieved by increasing the refresh rate of the picture, and the video image is divided into two by frame to form two sets of pictures corresponding to the left eye and the right eye, through the shutter type 3D. The cooperation of the glasses makes the two sets of screens enter the left and right eyes respectively, and finally the 3D stereoscopic image is synthesized in the brain.

The advantage of active shutter 3D technology is that it can achieve full HD 3D effect and the brightness of the screen is small. The difficulty lies in the matching of the image screen display and the opening and closing of the glasses. In practical applications, the image screen and 3D glasses need to be synchronously controlled.

For the liquid crystal display, when the image signal scanning of the liquid crystal display cannot be synchronized with the opening and closing of the 3D glasses, the performance of the 3D display may be affected, and crosstalk of the left and right eye images may occur, failing to achieve good 3D. display effect.

Summary of the invention

The present invention solves the above technical problems in the background art, and proposes a 3D image display method, system, 3D television and glasses, which can eliminate crosstalk of left and right eye images during 3D display and improve 3D display effect. The technical solution of the present invention is:

The embodiment of the invention provides a 3D image display method, and the method includes:

Extracting a synchronization control signal in the 3D image signal, and generating a corresponding backlight driving signal; according to the backlight driving signal, one or more of the N regions in the liquid crystal display in the direction of the row are completed After the refresh response of the current left or right eye image field data, the backlight area corresponding to the one or more areas is controlled to be lit, and the preset time range before the backlight area is turned on is turned off; wherein, in any corresponding During the preset time range in which the backlight area is lit, the corresponding liquid crystal display panel area is controlled to output only the image field data corresponding to the left eye or the right eye.

Preferably, the method further includes:

And generating a corresponding glasses driving signal according to the synchronization signal;

Controlling the opening and closing of the left and right lenses of the eyepiece of the 3D image according to the glasses driving signal, and the opening time of the left or right lens of the glasses is sequentially illuminated in the backlight signal output process of the left eye or the right eye. The entire time period.

Further, the method further includes: controlling, in the preset time range, any one of the liquid crystal lines in the liquid crystal display screen area corresponding to the corresponding backlight area to complete the right eye image after completing the refresh response of the left eye image field data The refresh response of the field data is extinguished before, and is extinguished before the refresh response of the left eye image field data is completed after the refresh response of the right eye image field data is completed.

A television set for displaying a 3D image, comprising: a liquid crystal display unit, a backlight unit, a receiving unit, and a 3D display control unit; wherein

The liquid crystal display unit and the backlight unit are divided into N areas in a row direction; the receiving unit is configured to receive a 3D image signal;

The 3D display control unit includes: a liquid crystal driving subunit, configured to drive the liquid crystal display unit to perform image field data refreshing; a backlight driving subunit, configured to extract a synchronization control signal in the 3D image signal, to generate a corresponding backlight according to the synchronization signal a driving signal; according to the backlight driving signal, when an area in the liquid crystal display unit completes a refresh response to the current left eye or right eye image field data, controlling a backlight unit corresponding to the certain area The backlight area in the light is turned on, and the preset time range before the backlight area is turned on is turned off, wherein the corresponding liquid crystal display area is only completed within the preset time range corresponding to lighting of any of the backlight areas. The output of the image field data corresponding to the left or right eye.

Preferably, the backlight driving subunit is further configured to: control, in the preset time range, any one of the liquid crystal lines in the liquid crystal display screen area corresponding to the corresponding backlight area to complete the refresh response of the left eye image field data And extinguishing before starting the refresh response of the right eye image field data, and extinguishing after completing the refresh response of the right eye image field data and before starting the refresh response of the left eye image field data.

Preferably, the 3D display control unit further includes:

a mirror driving subunit for generating a corresponding eyepiece driving signal according to the synchronization signal; controlling opening and closing of the left and right lenses of the eyepiece viewing the 3D image according to the glasses driving signal, the left side of the glasses Or the opening time of the right lens is the entire time period in which each backlight area is sequentially illuminated during the output process of the left eye or right eye image signal.

Preferably, the backlight unit adopts an LED light source.

A pair of glasses for viewing 3D images, including:

An opening and closing signal receiving unit, configured to receive a glasses driving signal;

An opening and closing control unit, configured to control opening and closing of the left and right lenses of the glasses for viewing the 3D image according to the glasses driving signal, wherein an opening time of the left or right lens of the glasses is a left eye or a right eye image signal output process The entire time period in which the backlight area is sequentially illuminated, wherein, in any corresponding backlight area During the lighting period, the corresponding liquid crystal display panel area is controlled to output only the image field data corresponding to the left eye or the right eye.

Preferably, in any period of time when any of the backlight regions is lit, any one of the liquid crystal lines in the corresponding liquid crystal display panel region of the corresponding backlight region starts to refresh the image data of the right eye image after completing the refresh response of the image data of the left eye image field. The signal is turned off before the response, and is extinguished before the refresh response of the left eye image field data is started after the refresh response of the right eye image field data is completed.

A 3D image display system comprising: a display device for displaying a 3D image and glasses for viewing a 3D image;

The display device includes: a liquid crystal display unit, a backlight unit, a receiving unit, and a 3D display control unit;

The liquid crystal display unit and the backlight unit are evenly divided into N areas in a row direction; the receiving unit is configured to receive a 3D image signal;

The 3D display control unit includes:

a liquid crystal driving subunit, configured to drive the liquid crystal display unit to perform image field data refreshing; a backlight driving subunit, configured to extract a synchronization control signal in the 3D image signal, to generate a corresponding backlight according to the synchronization signal a driving signal; according to the backlight driving signal, when an area in the liquid crystal display unit completes a refresh response to the current left eye or right eye image field data, controlling a backlight unit corresponding to the certain area The backlight area in the light is turned on, and the preset time range before the backlight area is turned on is turned off, wherein the corresponding liquid crystal display area is only completed within the preset time range corresponding to lighting of any of the backlight areas. An output corresponding to image field data of the left eye or the right eye;

a mirror driving subunit, configured to generate a corresponding glasses driving signal according to the synchronization signal; the glasses include: An opening and closing signal receiving unit, configured to receive a glasses driving signal; an opening and closing control unit, configured to control opening and closing of the left and right lenses of the glasses for viewing the 3D image according to the glasses driving signal, and opening the left or right lens of the glasses The time is the entire time period in which the backlight regions are sequentially illuminated during the output process of the left eye or right eye image signal.

Compared with the prior solution, the embodiment of the present invention has at least the following outstanding advantages: The embodiment of the present invention keeps the field frequency of the image signal unchanged, and realizes the time-division display of the left and right eye images by means of backlight control. Presetting the continuous lighting time of each area of the backlight. When a certain area of the N areas uniformly divided by the direction of the line in the liquid crystal display completes the refresh response of the current left or right eye image field data, the area is controlled. The corresponding backlight area is lit, and the lighting time is kept as a preset time value, that is, when a certain liquid crystal area starts to perform left and right eye image scanning switching, the backlight area corresponding to the liquid crystal area is extinguished, thereby realizing left and right eye image images. The separation effectively solves the problem of crosstalk between left and right pictures.

DRAWINGS

1 is a schematic diagram showing the area division of a liquid crystal display panel and a backlight unit according to an embodiment of the present invention; FIG. 2 is a schematic flow chart showing the steps of a 3D image display method according to an embodiment of the present invention;

3 is a schematic diagram of a refresh scan of a liquid crystal display according to an embodiment of the present invention;

4 is a schematic structural diagram of an embodiment of a television set for 3D image display according to the present invention; FIG. 5 is a schematic structural view of another embodiment of a television set for 3D image display according to the present invention; A schematic structural view of an embodiment of a glasses for viewing a 3D image; FIG. 7 is a schematic structural view of a 3D image display system of the present invention. detailed description

The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without the creative work are all within the scope of the present invention.

In the basic principle of liquid crystal display, the liquid crystal display panel and the backlight unit are generally divided into corresponding N regions in a row direction, as shown in FIG. 1, since each liquid crystal display region includes a plurality of liquid crystal lines, therefore, liquid crystal Each frame of the image displayed consists of several lines and is sequentially driven in units of rows. The liquid crystal has a brightness maintenance characteristic, that is, when the nth line is driven, the brightness is maintained until a new driving signal is driven. Therefore, when displaying two adjacent frames, such as the nth frame and the (n+1)th frame, part of the content in the (n+1)th frame image is the nth frame. When displaying 3D content, since the image content between two adjacent frames is greatly different and needs to be separately sent to the left eye and the right eye, the left and right eye images are mixed together most of the time, the human eye It is impossible to distinguish the image content of the left and right eyes, thereby causing crosstalk between the two eyes, and the images overlap.

In order to eliminate the crosstalk of the left and right eye images, a good 3D display effect is achieved. The embodiment of the present invention provides a 3D image display method. As shown in FIG. 2, the method includes the following steps: Step 201: Extracting a 3D image signal Synchronizing the control signals and generating corresponding backlight driving signals;

The image signals received by the display board may be 3D image signals of various formats; after receiving the 3D image signals, the display board may convert the 3D image signals into Low-Voltage Differential Signaling (Low-Voltage Differential Signaling, After the LVDS format is sent to the display driver board (T_CON), the left eye image signal and the right eye image signal are displayed when the display screen is driven; Step 202, according to the backlight driving signal, when the liquid crystal display is in the direction of the line After one or more of the divided N regions complete the refresh response to the current left or right eye image field data, the backlight region corresponding to the one or more regions is controlled to be lit, and then the backlight region is lit. The previous preset time range is turned off; wherein, in the preset time range corresponding to any backlight area lighting, controlling the corresponding liquid crystal display screen area only completes the output of the image field data corresponding to the left eye or the right eye.

The active shutter type 3D technology in the prior art realizes the display of 3D images by time division method, mainly by improving the refresh rate of the screen to realize the 3D effect. The image is divided into two by frame according to the 3D display screen to form two sets of pictures corresponding to the left eye and the right eye, and the left and right eye images are displayed in turn according to the sequence and transmitted to the eyes. In practical applications, the 3D display screens are sequentially issued. The eye image signal and the synchronization control signal are issued, and the light valve glasses control the opening and closing of the left and right eyeglasses after receiving the synchronization control signal, so that the left and right eyes of the user respectively receive the left and right eye image signals.

Under normal circumstances, the refresh rate of the 3D display must reach 120Hz or above, that is, let the left and right eyes receive images with a frequency above 60Hz, in order to ensure that the user sees continuous 3D images without flickering.

The embodiment of the invention can keep the field frequency of the image signal unchanged, realize the time-division display of the left and right eye images through the backlight control manner, and preset the continuous lighting time of each area of the backlight, when the liquid crystal display is in a row After a certain area of the N areas uniformly divided in direction completes the refresh response of the current left eye or right eye image field data, the backlight area corresponding to the area is controlled to be lit, and the lighting time is kept as a preset time value. That is, in the preset time range corresponding to the illumination of any of the backlight regions, controlling the corresponding liquid crystal display panel area to complete only the output of the image field data corresponding to the left or right eye, thereby realizing the separation of the left and right eye image frames, Effectively solve the problem of left and right picture crosstalk.

In addition, for the 3D display technology, it is necessary to use 3D glasses to view 3D images. Therefore, it is also necessary to extract a synchronization control signal from the 3D image signal, generate a corresponding glasses driving signal according to the synchronization signal, and control opening and closing of the left and right lenses of the glasses for viewing the 3D image according to the glasses driving signal, The opening time of the left or right lens of the glasses is the entire time period in which the backlight areas are sequentially illuminated during the output process of the left eye or right eye image signals.

Controlling the LED driven signal according to the synchronous control signal and controlling the viewing of the 3D map The signal-like glasses transmit the signal of the wafer opening and closing simultaneously, control to close the left lens when the right lens is opened, or close the right lens when the left lens is opened.

In order to facilitate a clear description of the specific embodiments of the present invention, a clear and complete description will be made by the specific embodiments.

Embodiment 1

The embodiment of the present invention realizes the separation of the left and right eye image frames by the backlight scanning control method, and effectively solves the problem of left and right picture crosstalk.

As shown in FIG. 1, it is a schematic diagram of dividing a liquid crystal display panel and a backlight unit region in an embodiment of the present invention. As shown in the figure, the liquid crystal display panel and the backlight unit are respectively divided into zone1, zone 2, zone3, zone n n zones i or in the direction of the row, and each zone i is refreshed and controlled in time division.

Generally, the division of the backlight area is at least four areas. The number of specific areas is mainly determined by the response time of the LCD. The more the area of the backlight area is divided, the higher the light efficiency of the backlight, but the light output is reduced, and the brightness is reduced. Those skilled in the art can consider and determine the different response time performance of the liquid crystal display.

In the embodiment of the present invention, the backlight may be an LED (Light Emitting Diode) light source, and includes an Entangled Light Emitting Diode (ELED) light source.

The following describes in detail how the backlight unit and the liquid crystal display are synchronously controlled in the embodiment of the present invention.

First, some parameters appearing in the embodiment of the present invention are explained:

Assuming that the full-screen image of the initial liquid crystal display is displayed as an image with a grayscale of gl, when the left and right eye images are refreshed, the first frame image is an image with a gray level of g2, and the second frame image is an image with a gray level of g3; For the image of the grayscale gl to the image of the grayscale g2, and then to the image of the grayscale g3, the following parameters are defined (for the image that is not the same grayscale, consider the response time of the interframe image with the maximum response time or the approximate maximum response time) ), among them:

T _fmme represents a liquid crystal scanning frame period; T _lc _ _SCi „„ _lwg indicates the time when the liquid crystal is scanned from the first line to the last line;

— _∞ , indicating the continuous lighting time of each LED backlight area (zone l~zone n ); 2 indicates the response time of the liquid crystal display image from gray gl to gray g2; ^―^ indicates that the LCD image is The gray level g2 changes to the response time of the gray level g3;

T _hold represents the time when the liquid crystal is in a steady state after completing the corresponding gray scale change;

T _giass —. „ Indicates the time when the left eye piece or the right eye piece of the 3D glasses is continuously open.

As shown in FIG. 3, refreshing the scanning screen for the liquid crystal display, wherein the curve 1 indicates that the first liquid crystal line corresponding to the first area of the liquid crystal display panel completes the gray level gl to the gray level g2, and is determined by the gray level g2 The response curve of the gray level g3; the curve 2 indicates the response curve of the last liquid crystal line corresponding to the first area of the liquid crystal display panel to complete the gray level gl to the gray level g2 and from the gray level g2 to the gray level _g 3; Indicates the response curve of the last liquid crystal line corresponding to the zone n of the last area of the liquid crystal display to complete the gray scale gl to the gray scale g2 and from the gray scale g2 to the gray scale g3.

When the last liquid crystal line corresponding to the first region zonel completes the response of the gray scale gl to the gray scale g2, when the liquid crystal molecules of the row partition are in the Hold state, that is, at the time T _lc —— _g ln + T _gi — _g _ The first zone of the backlight starts to scan, and the continuous lighting time is r _B — _{m> 3⁄4} , and then goes out; when the last liquid crystal line corresponding to the second row partition zone 2 completes the response of the gray scale gl to the gray scale g2, When the liquid crystal molecules of the row partition are in the Hold state, that is, at (r _fc / M ) _g2 , the second region of the backlight region 2 starts scanning, and the continuous lighting time is „ _; , then goes out; ... when the last row The last liquid crystal line corresponding to the partition zone n completes the response of the gray scale gl to the gray scale g2, and when the liquid crystal molecules of the row partition are in the Hold state, that is, at the time of _lc - _scanning l _n ) *n+ 7 ₂ , the nth region of the backlight Zone n starts scanning, and the continuous lighting time is r _B — _m>3⁄4 , and then goes out; At this point, the LCD screen completes one cycle of liquid crystal scanning display and backlight scanning display of gray scale gl to g2; and 3D-glasses open time is backlight Light from zone 1 to zone n The entire period for the LCD screen, the image to grayscale g2 g3 by the scanning of the refresh operation by the scanning operation with the image intensity of a gl to g2 Therefore, no more praise will be made here.

The scanning refresh of the image gray scale of the liquid crystal display from gl to g2 is taken as an example to illustrate the synchronous control process of the backlight unit and the liquid crystal display.

According to the principle that the left and right eyes are separated by 3D display, it can be concluded that the illumination time of the image of the liquid crystal display is changed from gl to g2, and the lighting time of the backlight area zone 1 should not be extended to the image gray level of the liquid crystal display from g2 to The opening time of the backlight zone 1 at g3, that is, within the preset time range corresponding to the illumination of any of the backlight regions, controlling the corresponding liquid crystal display panel area to complete only the output of the image field data corresponding to the left eye or the right eye. Corresponding to the opening time of the backlight zone 1 when the gray level of the image of the liquid crystal display is from g2 to g3, the other optical lens of the 3D glasses starts to open. When the above two times intersect, one of the ophthalmic lenses of the 3D glasses will see an image corresponding to the other ophthalmic lens, causing crosstalk between the two eyes, and the images overlap. Therefore, the following formula can be derived:

T, ■ I η + Τ _Ί +T , <T _f +T _Ί , + Γ, . In (1) According to the formula (1), it can be deduced that the opening time of the left or right lens of the 3D glasses should follow the following formula. :

T, <T _t +T ₇ ,-Γ, ₉ (2) At the same time, in order to ensure the display effect of the 3D image, the opening and closing time of the 3D glasses should be controlled strictly with the corresponding backlight area lighting, closing time synchronization and equal or similar Equivalent, otherwise, the 3D image that is finally displayed may have different brightness in the upper and lower parts. In order to avoid this defect, the following formula is derived:

The time when the first backlight area zonel is turned on is r _fc — „ _; +7^— ₂ , and the last backlight area zone n is turned on ( T _lc — _scaming In ) "n+T _{gl g2} , therefore, from zone 1 The backlighting time to the zone n is as shown in equation (3):

T ― ― 丄. (3) nnn Combining (2) and (3), you can get:

T _R1 <T _f +T ₇ ,-Γ, ₉ — ·Γ, (4) At the same time, in order to achieve a good display effect, the main removal of the backlight may be caused by scanning, which may introduce a ghost phenomenon of the gray level of the image boundary, in either In a preset time range in which the backlight area is continuously lit, any one of the liquid crystal lines in the liquid crystal display screen area corresponding to the backlight area is subjected to the refresh response of the left eye image field data, and before the refresh response of the right eye image field data is started. It is turned off, and is turned off before the refresh response of the left eye image field data is completed after the refresh response of the right eye image field data is completed. Referring to FIG. 3, taking the backlight area zone 1 as an example, the time during which the backlight area zone 1 is continuously lit should end before the first line of liquid crystal lines responds from the gray level g2 to g3, thereby obtaining the formula (5). Of course, if ghost is controlled to a certain tolerance range, the result of equation (5) can be expanded accordingly.

T _m . ≤Γ, ,, -Γ, . In (5) Combining equations (3) and (5), it can be concluded that the time for each area of the backlight to illuminate continuously is expressed by equation (6), that is, (3) The minimum time in equations and (5):

T < mini ι , + Γ , - Γ _Ί χ 2, , , , - , . In] J (6) The continuous lighting time signal of the backlight area can pass through the FPGA (Field-Programmable Gate)

Array, Field Programmable Gate Array) The timing control signal of the chip sending backlight is completed. The LED light source output driving signal of each backlight area is controlled by the chip to turn on or off.

In addition, the manner of transmitting the above-mentioned lens opening and closing signals to the glasses includes: infrared, radio frequency or Bluetooth.

The purpose of the embodiment of the present invention is to synchronize the blinking of the LED backlight with the liquid crystal display, so that the left and right eye 3D images are separated when the left and right eye images reach the 3D glasses, and finally the 3D image is synthesized in the human brain. The smaller the left and right eye 3D images overlap, the better the 3D effect, and the 3D left and right eye image ghosting (3D crosstalk) The smaller. At the same time, the synchronous modulation of the LED backlight and the liquid crystal display will greatly improve the moving image display performance of the liquid crystal display, which is beneficial to the continuity and flow of the 3D moving image. It can be seen that by the preset lighting time of the backlight area, when all the liquid crystal lines in the zone 1 region complete the refresh response to the current left eye or right eye image field data, the backlight of the zone 1 area is turned on. At this time, only the zone 1 displays the image, and the other parts are black. When it is ensured that all the liquid crystal lines in the zone 2 area have completed the refresh response to the current left or right eye image field data, the backlight of the zone 2 area is turned on. And so on, complete the image display of the entire screen. Therefore, in the case where the field frequency of the image signal is kept constant, it is ensured that the left and right eye image crosstalk does not occur in each display area of the liquid crystal display every time. The 120 Hz liquid crystal display can be applied to the same embodiment of the present invention, and can achieve the same 3D display effect as the 240 Hz liquid crystal display. At the same time, the effect of improving the 3D display effect can also be achieved by using the 240 Hz liquid crystal display or other scanning frequency panel in combination with the embodiment of the present invention. It can be seen that the present invention has good compatibility regardless of the 3D implementation of the 120 Hz liquid crystal display or the 3D performance improvement of the liquid crystal display with higher display frequency.

Embodiment 2

Corresponding to the above 3D image display method, the embodiment of the present invention further provides a television set for 3D image display. As shown in FIG. 4, the television set 40 includes: a liquid crystal display unit 401, a backlight unit 402, and a receiving unit. 403 and 3D display control unit 404; wherein

The liquid crystal display unit 401 and the backlight unit 402 are divided into N areas in a row direction, as shown in FIG. 1;

The receiving unit 403 is configured to receive a 3D image signal;

The image signals received by the receiving unit 403 may be 3D image signals of various formats; after receiving the 3D image signals, the receiving unit 403 may convert the 3D image signals The low-voltage differential signal format is sent to the display driver board (T_CON), and the left-eye image signal and the right-eye image signal are displayed when driving the television display screen;

The 3D display control unit 404 includes:

a liquid crystal driving subunit 4041, configured to drive the liquid crystal display unit 401 to perform image field data refreshing;

a backlight driving subunit 4042, configured to extract a synchronization control signal in the 3D image signal, generate a corresponding backlight driving signal according to the synchronization signal, and according to the backlight driving signal, in the liquid crystal display unit 401 After a certain region completes the refresh response to the current left or right eye image field data, the backlight region in the backlight unit corresponding to the control region is lit, and the preset time range before the backlight region is turned on is turned off, wherein Controlling the corresponding liquid crystal display panel area only completes the output of the image field data corresponding to the left eye or the right eye within the preset time range corresponding to the illumination of any of the backlight regions.

The 3D television provided by the embodiment of the invention can keep the field frequency of the image signal unchanged, realizes the time-division display of the left and right eye images by the backlight control mode, and presets the continuous lighting of each area of the backlight through the backlight driving sub-unit. Time, when a certain area of the N areas uniformly divided by the direction of the line in the liquid crystal display completes the refresh response of the current left or right eye image field data, the backlight area corresponding to the area is controlled to be lit, and remains The lighting time is a preset time value r _B — _ra>3⁄4 , that is, when a certain liquid crystal region starts to perform left and right eye image scanning switching, the backlight region corresponding to the liquid crystal region is extinguished, thereby realizing separation of left and right eye image images. Effectively solve the problem of left and right picture crosstalk.

In order to achieve a good display effect, the backlight is mainly removed from the backlight. The backlight driving sub-unit is further configured to: control the corresponding backlight region within the preset time range. The liquid crystal line of any row in the corresponding liquid crystal display area is extinguished after the refresh response of the left eye image field data is completed, and the refresh response of the right eye image field data is started, and after the refresh response of the right eye image field data is completed, Turns off before starting the refresh response of the left eye image field data. In addition, for the glasses type 3D display technology, the above 3D television set needs to cooperate with a 3D view mirror to view a 3D image. Therefore, in another 3D television set, as shown in FIG. 5, the 3D display control unit 404 further includes: a mirror driving subunit 4043, configured to generate a corresponding glasses driving signal according to the synchronization signal; The glasses driving signal controls the opening and closing of the left and right lenses of the glasses for viewing the 3D image, and the opening time of the left or right lens of the glasses is the entire time when the backlight regions are sequentially illuminated during the output process of the left or right eye image signals. segment.

In this embodiment, the glasses driving subunit is required to extract a synchronization control signal from the 3D image signal, generate a corresponding glasses driving signal according to the synchronization signal, and control the glasses to view the 3D image according to the glasses driving signal. The opening and closing of the lens, the opening time of the left or right lens of the glasses is the entire time period in which the backlight regions are sequentially illuminated during the output process of the left eye or right eye image signals.

By pre-setting the backlight unit's continuous lighting time T _BL ― _mg and the opening time of the left or right lens of the glasses, when all the liquid crystal lines in the zone 1 region have completed the refresh response to the current left or right eye image field data Then, the backlight of the zone 1 area is turned on. At this time, only the zone 1 displays the image, and the other part is black; when all the liquid crystal lines in the zone 2 area are completed, the refresh response of the current left eye or right eye image field data is completed. , then turn on the backlight of the zone 2 area, and so on, to complete the image display of the entire screen. Therefore, in the case where the field frequency of the image signal is kept constant, it is ensured that the left and right eye image crosstalk does not occur in each display area of the liquid crystal display every time.

The backlight unit may employ an LED light source, including an enhanced LED light source.

The continuous lighting time signal of the backlight area can be completed by sending a timing control signal of the backlight of the FPGA chip, and the LED light source output driving signal of each backlight area is controlled to be turned on or off by the chip.

Embodiment 3

Correspondingly, an embodiment of the present invention further provides a eyepiece for viewing a 3D image, as shown in FIG. The glasses 60 include:

An open/close signal receiving unit 601, configured to receive a glasses driving signal;

The opening and closing control unit 602 is configured to control opening and closing of the left and right lenses of the glasses for viewing the 3D image according to the glasses driving signal, and the opening time of the left or right lens of the glasses is a left eye or right eye image signal output process The backlight unit is sequentially illuminated for a whole period of time, wherein the corresponding liquid crystal display panel area is controlled to output only the image field data corresponding to the left eye or the right eye during the time period in which any of the backlight regions is lit.

The glasses are used to match the television set for 3D image display in the second embodiment to realize viewing of the 3D image.

In addition, in any period of time when any backlight area is lit, any one of the liquid crystal lines in the corresponding liquid crystal display area corresponding to the backlight area starts to perform refresh response of the right eye image field data after completing the refresh response of the left eye image field data. It is turned off before, and is turned off before the refresh response of the left eye image field data is completed after the refresh response of the right eye image field data is completed.

The eyepiece for viewing 3D images provided by the embodiments of the present invention can ensure the opening and closing of the left and right eyeglasses and the opening and closing of the LED backlight and the scanning of the liquid crystal display under the control of the television for 3D image display. Keeping synchronized, so that the left and right eye 3D images are separated when the left and right eye images reach the 3D eyepiece, and finally the crosstalkless 3D image is synthesized in the human brain.

The open/close signal receiving unit may receive a lens opening and closing signal transmitted to the glasses by infrared, radio frequency or Bluetooth in a television for 3D image display.

Embodiment 4

An embodiment of the present invention provides a 3D image display system. As shown in FIG. 7, the system includes: a display device 70 for displaying 3D images and glasses 71 for viewing 3D images;

The display device 70 includes: a liquid crystal display unit 701, a backlight unit 702, a receiving unit 703, and a 3D display control unit 704;

The liquid crystal display unit 701 and the backlight unit 702 are divided into N in the direction of the row. Zone i or, as shown in Figure 1;

The receiving unit 703 is configured to receive a 3D image signal;

The 3D display control unit 704 includes:

a liquid crystal driving subunit 7041, configured to drive the liquid crystal display unit to perform image field data refreshing;

a backlight driving subunit 7042, configured to extract a synchronization control signal in the 3D image signal, generate a corresponding backlight driving signal according to the synchronization signal; according to the backlight driving signal, when in the liquid crystal display unit After a region completes the refresh response to the current left-eye or right-eye image field data, the backlight region in the backlight unit corresponding to the certain region is controlled to be lit, and the preset time range before the backlight region is turned on is turned off. The controlling the corresponding liquid crystal display area only completes the output of the image field data corresponding to the left eye or the right eye in the preset time range corresponding to any backlight area lighting;

The eyepiece driving subunit 7043 is configured to generate a corresponding eyepiece driving signal according to the synchronization signal; the glasses 71 include:

The opening and closing signal receiving unit 710 is configured to receive a glasses driving signal;

The opening and closing control unit 711 is configured to control opening and closing of the left and right lenses of the glasses 71 for viewing the 3D image according to the glasses driving signal, and the opening time of the left or right lens of the glasses 71 is a left eye or right eye image signal output. The entire time period in which each backlight area is sequentially illuminated during the process.

It should be noted that, the backlight driving subunit may further be configured to: control, in the preset time range, any one of the liquid crystal lines in the liquid crystal display screen area corresponding to the corresponding backlight area to complete the left eye image field data. After the response is refreshed, the refresh response of the right eye image field data is turned off, and is extinguished after the refresh response of the right eye image field data is completed and before the refresh response of the left eye image field data is started. By further defining the continuous lighting time of the backlight region, it is possible to remove the ghost phenomenon that the backlight of the image may be grayed out due to scanning.

By pre-setting the backlight area's continuous lighting time ^--g, so that all the zones in the zone 1 area After the LCD line completes the refresh response to the current left or right eye image field data, the backlight of the zone 1 area is turned on. At this time, only the zone 1 displays the image, and the other parts are black; when ensuring all the zones in the zone 2 area After the LCD line finishes refreshing the response to the current left or right eye image field data, the backlight of the zone 2 area is turned on, and so on, to complete the image display of the entire screen. Therefore, in the case where the field frequency of the image signal is kept constant, it is ensured that the left and right eye image crosstalk does not occur in each display area of the liquid crystal display every time.

The backlight unit uses an LED light source, including an enhanced LED light source.

The 120 Hz liquid crystal display can be applied to the same embodiment of the present invention, and can achieve the same 3D display effect as the 240 Hz liquid crystal display. At the same time, the effect of improving the 3D display effect can also be achieved by using the 240 Hz liquid crystal display or other scanning frequency panel in combination with the embodiment of the present invention. It can be seen that the present invention has good compatibility, whether it is a 3D implementation of a 120 Hz liquid crystal display or a 3D performance improvement of a liquid crystal display with a higher display frequency. For the system and device embodiments, since they basically correspond to the method embodiments, they are described in a relatively simple manner, and the relevant parts can be referred to the description of the method embodiments. The system embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules, ie may be located A place, or it can be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort. The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the embodiments of the invention. . Therefore, the embodiments of the present invention are not to be limited to the embodiments shown herein, but are to be accorded to the broadest scope of the principles and novel features disclosed herein.

Claims

Rights request

A method for displaying a 3D image, the method comprising:

The method of displaying a 3D image according to claim 1, wherein the method further comprises:

Generating a corresponding glasses driving signal according to the synchronization signal;

The method of displaying a 3D image according to claim 1 or 2, wherein the method further comprises: controlling, in the preset time range, any one of the liquid crystal display regions corresponding to the corresponding backlight region. The line is extinguished after the refresh response of the left eye image field data is completed, before the refresh response of the right eye image field data is started, and after the refresh response of the right eye image field data is completed, before the refresh response of the left eye image field data is started Extinguished.

A television set for displaying a 3D image, wherein the television set comprises: a liquid crystal display unit, a backlight unit, a receiving unit, and a 3D display control unit;

The 3D display control unit includes:

a liquid crystal driving subunit, configured to drive the liquid crystal display unit to perform image field data refreshing; a backlight driving subunit, configured to extract a synchronization control signal in the 3D image signal, to generate a corresponding backlight according to the synchronization signal a driving signal; according to the backlight driving signal, when an area in the liquid crystal display unit completes a refresh response to the current left eye or right eye image field data, controlling a backlight unit corresponding to the certain area The backlight area in the light is turned on, and the preset time range before the backlight area is turned on is turned off, wherein the corresponding liquid crystal display area is only completed within the preset time range corresponding to lighting of any of the backlight areas. The output of the image field data corresponding to the left or right eye.

The 3D image display television set according to claim 4, wherein the backlight driving subunit is further configured to: control the liquid crystal display screen area corresponding to the corresponding backlight area within the preset time range The liquid crystal line of any one of the lines is turned off after the refresh response of the left eye image field data is completed, and the refresh response of the right eye image field data is started, and the left eye image field is started after the refresh response of the right eye image field data is completed. The refresh response of the data is extinguished before.

The 3D image display television set according to claim 4 or 5, wherein the 3D display control unit further comprises:

7. The 3D image display television set according to claim 6, wherein the backlight unit uses an LED light source.

8. A eyepiece for viewing a 3D image, the eyeglass comprising: an opening and closing signal receiving unit, configured to receive a glasses driving signal;

An opening and closing control unit, configured to control opening and closing of the left and right lenses of the glasses for viewing the 3D image according to the glasses driving signal, wherein an opening time of the left or right lens of the glasses is a left eye or a right eye image signal output process The entire time period in which the backlight area is sequentially illuminated, wherein the corresponding liquid crystal display area is controlled to output only the image field data corresponding to the left eye or the right eye during the time period in which any of the backlight areas is lit.

9. The eyepiece for viewing a 3D image according to claim 7, wherein in any period of time during which the backlight region is lit, any one of the liquid crystal lines in the corresponding liquid crystal display region corresponding to the backlight region is After the refresh response of the left eye image field data is completed, the refresh response of the right eye image field data is turned off, and the image is turned off before the refresh response of the left eye image field data is completed.

10. A 3D image display system, the system comprising: a display device for 3D image display and glasses for viewing a 3D image;

The 3D display control unit includes:

a liquid crystal driving subunit, configured to drive the liquid crystal display unit to perform image field data refreshing; a backlight driving subunit, configured to extract a synchronization control signal in the 3D image signal, to generate a corresponding backlight according to the synchronization signal Driving signal; according to the backlight driving signal, when the liquid crystal display After a certain area in the screen unit completes the refresh response to the current left eye or right eye image field data, the backlight area in the backlight unit corresponding to the certain area is controlled to be lit, and before the backlight area is lit The preset time range is closed, wherein, in the preset time range corresponding to any backlight area lighting, controlling the corresponding liquid crystal display screen area to complete output of the image field data corresponding to the left eye or the right eye;

a mirror driving subunit, configured to generate a corresponding glasses driving signal according to the synchronization signal; the glasses include:

An opening and closing control unit, configured to control opening and closing of the left and right lenses of the glasses for viewing the 3D image according to the glasses driving signal, wherein an opening time of the left or right lens of the glasses is a left eye or a right eye image signal output process The backlight area is illuminated for the entire period of time.

The 3D image display system according to claim 10, wherein the backlight driving subunit is further configured to: control, in the preset time range, a liquid crystal display screen region corresponding to the corresponding backlight region Any one of the liquid crystal lines is turned off after the refresh response of the left eye image field data is completed, and the refresh response of the right eye image field data is started, and after the refresh response of the right eye image field data is completed, the left eye image field data is started. Off before refreshing the response.