CN101937147A - 3D liquid crystal display and 3D liquid crystal display system - Google Patents
3D liquid crystal display and 3D liquid crystal display system Download PDFInfo
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- CN101937147A CN101937147A CN2010102563559A CN201010256355A CN101937147A CN 101937147 A CN101937147 A CN 101937147A CN 2010102563559 A CN2010102563559 A CN 2010102563559A CN 201010256355 A CN201010256355 A CN 201010256355A CN 101937147 A CN101937147 A CN 101937147A
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Abstract
The invention is applicable in the 3D display field, and provides a 3D liquid crystal display and a 3D liquid crystal display system. The 3D liquid crystal display comprises a backlight unit, a display unit, a liquid crystal light valve arranged on the outer part of the display unit, and a peripheral drive circuit connected with the backlight unit, the display unit and the liquid crystal light valve. The 3D liquid crystal display is characterized in that: the liquid crystal light valve is a twisted nematic liquid crystal light valve; the backlight unit is in a turn-off state when the display unit updates images and in a turn-on state when the images are stable; and the sum of the turn-off time and the turn-on time of the backlight unit is equal to the sum of the image updating time and the image stabilizing time of the display unit. The backlight is turned off when the images are updated so as to avoid the crosstalk problem caused by concurrence of left and right eye images.
Description
Technical field
The invention belongs to 3D stereo display field, relate in particular to a kind of 3D LCD and 3D liquid crystal display systems.
Background technology
The ultimate principle that 3D shows is that the right and left eyes to the people provides two discrepant pictures respectively, by brain this two width of cloth picture is synthesized the image with 3D effect.The common method that this two width of cloth picture is provided respectively be by three-dimensional display with the right and left eyes image change into two kinds of different polarization directions light penetrate, utilize corresponding polaroid to come analyzing, thereby isolate the image of right and left eyes, offer right and left eyes respectively.Development along with the liquid crystal panel technology, after refreshing frequency surpasses the display appearance of 120Hz, the refresh rate of right and left eyes image is enhanced about more than once, the scheme of full resolution also occurs thereupon, comparatively common scheme is to control display outgoing polarized light state to distinguish the right and left eyes image by a polarized light controller, carry out delivering to respectively after the analyzing people's right and left eyes again by polaroid glasses, form 3D rendering.These design for scheme main points are: twisted nematic (TN) liquid crystal light valve that designs one 90 degree distortions is close to the surface of display device, the display device of high refreshing frequency is alternately exported the right and left eyes image information with the frequency that is exceedingly fast, be incident to the linearly polarized light of TN light valve, behind the TN light valve, can be by the polarization direction of automatically controlled TN light valve synchro control right and left eyes image emergent ray.When not powering up, the TN liquid crystal molecule is in 90 degree twisted states (being the OFF attitude), revolves through its linearly polarized light polarization direction to turn 90 degrees; When powering up, the TN liquid crystal molecule is in vertical state (being the ON attitude), and is constant through its linearly polarized light polarization direction; By two mutually perpendicular linearly polarized lights of automatically controlled formation, after the observer wears the line polaroid glasses identical with these two polarization directions, just can isolate the light of this both direction like this, make right and left eyes receive different pictures.But the picture crosstalk phenomenon appears in picture that existing 3D LCD provides easily, influences viewing effect.
Summary of the invention
The object of the present invention is to provide a kind of 3D LCD, be intended to solve the cross-interference issue that existing 3D LCD occurs easily.
The present invention realizes like this, a kind of 3D LCD, described 3D LCD comprises back light unit, display unit, is located at the liquid crystal light valve of described display unit outside, and the peripheral drive circuit that is connected with described back light unit, display unit and liquid crystal light valve, described liquid crystal light valve is the twisted nematic liquid crystals light valve; Described back light unit is in closed condition when described display unit carries out image update, be in opening when image stabilization; The shut-in time of described back light unit and opening time sum equal the image update time and the image stabilization time sum of described display unit.
Another object of the present invention is to provide a kind of 3D liquid crystal display systems, comprise LCD and polaroid glasses, this LCD is above-mentioned 3D LCD.
The present invention closes in the image update period by the peripheral drive circuit control backlight of LCD in good time, has avoided the right and left eyes image to occur the cross-interference issue that causes simultaneously.
Description of drawings
Fig. 1 is the 3D liquid crystal display device structure synoptic diagram that first embodiment of the invention provides;
Fig. 2 is the optical relation synoptic diagram of optics in the 3D LCD that provides of first embodiment of the invention;
Fig. 3 occurs the synoptic diagram of crosstalking when longer at liquid crystal light valve response time of providing of second embodiment of the invention;
Fig. 4 does not have the synoptic diagram of crosstalking when suitable liquid crystal light valve response time of providing of second embodiment of the invention;
Fig. 5 is the sequential chart of each driving circuit of the 3D LCD that provides of first embodiment of the invention;
Fig. 6 is the 3D liquid crystal display device structure synoptic diagram that third embodiment of the invention provides;
Fig. 7 is the optical relation synoptic diagram of optics in the 3D LCD that provides of third embodiment of the invention;
Fig. 8 is the sequential chart of LCD that fifth embodiment of the invention provides each driving circuit when switching to the 2D state.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The embodiment of the invention is closed backlight in good time in the image update period, avoid the right and left eyes image to occur the cross-interference issue that causes simultaneously.
The embodiment of the invention provides a kind of 3D LCD, comprise back light unit, display unit, be located at the liquid crystal light valve of display unit outside, and the peripheral drive circuit that is connected with back light unit, display unit and liquid crystal light valve, liquid crystal light valve is the twisted nematic liquid crystals light valve; Back light unit is in closed condition when display unit carries out image update, be in opening when image stabilization; The shut-in time of back light unit and opening time sum equal the image update time and the image stabilization time sum of display unit.
The present invention closes in the image update period by the peripheral drive circuit control backlight of LCD in good time, has avoided the right and left eyes image to occur the cross-interference issue that causes simultaneously.
The embodiment of the invention also provides a kind of 3D liquid crystal display systems, comprises LCD and polaroid glasses, and this LCD is above-mentioned 3D LCD.
Below in conjunction with specific embodiment specific implementation of the present invention is described in detail:
Embodiment one:
Fig. 1 shows the 3D liquid crystal display device structure synoptic diagram that first embodiment of the invention provides, Fig. 2 shows the optical relation synoptic diagram of each optics in the 3D LCD that first embodiment of the invention provides, Fig. 5 shows the sequential chart of each driving circuit of the 3D liquid crystal display systems that first embodiment of the invention provides, for convenience of explanation, only show the part relevant with the embodiment of the invention.
Please in conjunction with Fig. 1, this 3D LCD comprises the back light unit 1 that is made of blooming pieces such as led light source, reflectance coating, light guide plate, brightness enhancement film, diffusion barriers, by end polaroid 21, substrate 22, liquid crystal layer 23, face substrate 24, and face polaroid 25 display unit 2 of fitting successively and constituting, and the liquid crystal light valve 3 of being located at display unit 2 outsides, back light unit 1, display unit 2 and liquid crystal light valve 3 are connected with peripheral drive circuit 4 respectively.In the back light unit 1, by the brightness and the switching time of peripheral drive circuit control led light source with bandwidth modulation (PWM) function.Said structure is existing 3D liquid crystal display device structure, and detail repeats no more.Liquid crystal light valve 3 is twisted nematic (TN) liquid crystal light valve, by end tin indium oxide (ITO) transparency carrier 31, layer of liquid crystal molecule 32, and go up ITO transparency carrier 33 formation of fitting successively, twisted state by liquid crystal molecule in the peripheral drive circuit 4 control liquid crystal light valves 3, and then control is by the polarization direction of the linearly polarized light of liquid crystal light valve 3, for liquid crystal light valve 3 periodically powers up, can make it to see through orthogonal linearly polarized light, the light of two kinds of polarization directions is respectively the observer left-and right-eye images is provided.The beholder wears the line polaroid glasses linearly polarized light is carried out analyzing, and forms the 3D image in brain.
In embodiments of the present invention, the frictional direction of the direction of shaking thoroughly of face polaroid 25, end ITO transparency carrier 31 and last ITO transparency carrier 33 satisfies following relation: the direction of shaking thoroughly of face polaroid 25 is parallel to each other with the frictional direction of end ITO transparency carrier 31 or is vertical, end ITO transparency carrier 31 is vertical mutually with the frictional direction of last ITO transparency carrier 33, to produce the orthogonal linearly polarized light in polarization direction.
In embodiments of the present invention, LCD is in the handoff procedure of right and left eyes image, and display unit 2 is updated to last column display pixel from the first row display pixel, supposes that this transmission course elapsed-time standards is t
1, the image stabilization time is t
2, at t
1In period, can have an extremely short time period, the image of right and left eyes appears on the screen simultaneously therebetween, and this picture enters in beholder's same the eyes, then picture crosstalk can occur.Present embodiment is by following method head it off, and among Fig. 5, image update sequential T1, liquid crystal light valve switching sequence T2 and backlight unit switch sequential T3 are all by peripheral drive circuit 4 controls.In the image update process but before also not reaching steady state (SS), backlight (led light source) is closed a period of time t
4, after image stabilization, backlight is opened a period of time t
3, wherein, each time period is satisfied following relation:
t
1+t
2＝t
3+t
4，t
3≤t
2
So just, solved cross-interference issue, the open and close action of liquid crystal light valve 3 need be synchronous with the right and left eyes image transmission signals of main frame output, and the open and close time of backlight is satisfied the above-mentioned relation formula.The input of right and left eyes picture signal, the switch of liquid crystal light valve, and the switch of backlight is all by peripheral drive circuit 4 controls.
Embodiment two:
Fig. 3 shows liquid crystal light valve response time that second embodiment of the invention provides and occurs the synoptic diagram of crosstalking when longer, Fig. 4 shows liquid crystal light valve response time that second embodiment of the invention provides is not had the synoptic diagram of crosstalking when suitable, for convenience of explanation, only show the part relevant with the embodiment of the invention.
In embodiments of the present invention, when LCD with high refreshing frequency (〉=120Hz) during the update displayed content, the right and left eyes image needs to finish with interior renewal at 1/120Hz=8.33ms, at this moment the section in, that liquid crystal light valve 3 must be finished is stable-conversion of opening or stablize-closing, the response time that is liquid crystal light valve 3 need satisfy: opening time Ton＜8.33ms, shut-in time Toff＜8.33ms.If Ton＞8.33ms, before piece image arrived down, the liquid crystal molecule in the liquid crystal light valve 3 also had little time to become vertical state from original state.As Toff＞8.33ms, before piece image arrived down, the liquid crystal molecule in the liquid crystal light valve 3 can't be twisted state (as shown in Figure 3) from vertical state exchange, therefore liquid crystal light valve can the orthogonal linearly polarized light of transmission, at this moment, crosstalking can appear in picture, influences viewing effect.For head it off, can reduce Ton by increasing driving voltage, by the thick Toff of reducing of box that reduces liquid crystal light valve 3, to improve cross-interference issue (as Fig. 4).Increase driving voltage and can guarantee Ton＜t
4,, can guarantee Toff＜t when box is thick when being controlled in 1.0～4.0 mu m ranges
4, promptly in the period that backlight is closed, that liquid crystal light valve 3 has been finished is stable-process of opening or stablize-closing, thus solve cross-interference issue fully.
Embodiment three:
Fig. 6 shows the structural representation of the 3D LCD that third embodiment of the invention provides, Fig. 7 shows the optical relation synoptic diagram of each optics in the 3D LCD that third embodiment of the invention provides, for convenience of explanation, only show the part relevant with the embodiment of the invention.
3D LCD in the foregoing description one, two produces orthogonal linearly polarized light and is respectively the beholder left-and right-eye images is provided, but when observer's head twists, can produce image fault, influences viewing effect.For head it off, present embodiment attaches one deck λ/4 wave plates 5 at the outside surface of liquid crystal light valve 3, the orthogonal linearly polarized light of liquid crystal light valve 3 transmissions forms left-handed and right-circularly polarized light respectively after by λ/4 wave plates 5 like this, be respectively the beholder left eye and eye image are provided, correspondingly, the beholder wears rotatory polarization glasses 6, can receive left-and right-eye images, in brain, form the 3D image, so just solved because the image fault problem that beholder's rotation head causes.
Further combined with Fig. 7, the frictional direction of the direction of shaking thoroughly of face polaroid 25, end ITO transparency carrier 31 and last ITO transparency carrier 33, and the optical axis direction of λ/4 wave plates 5 satisfies following relation: the direction of shaking thoroughly of face polaroid 25 is parallel to each other with the frictional direction of end ITO transparency carrier 31 or is vertical, end ITO transparency carrier 31 is vertical mutually with the frictional direction of last ITO transparency carrier 33, the optical axis direction angle at 45 of the frictional direction of last ITO transparency carrier 33 and λ/4 wave plates 5 is to form circularly polarized light.
Embodiment four:
In embodiments of the present invention, this liquid crystal light valve 3 can obtain by following method: at first a glass substrate is etched into whole electrode, draws two electrode incoming ends to the step of substrate, be used for connecting external drive circuit (as Fig. 1).After etching finishes, therein on glass substrate spin coating layer of transparent coating (Over-coating, OC), OC forms the right cylinder of certain thickness certain diameter size behind etching technics, to support two glass substrates.Even coating a kind of polyphosphazene polymer acid imide (PI) on two sheet glass substrates behind hot setting, is orientated friction according to specific direction again, form on the surface of PI same towards small groove, be used for the liquid crystal molecule of follow-up perfusion is carried out orientation.Two glass substrates with around edge sealing adhesive sealing, form cavity with the thick and certain volume of certain box, again to wherein pouring into liquid crystal, forms the TN light valve that one 90 degree twists.
Embodiment five:
In embodiments of the present invention, this 3D liquid crystal display systems can also be realized the switching of 2D and 3D effect, please in conjunction with the accompanying drawings 8, if will switch to the 2D state, only need close liquid crystal light valve 3, the output signal of switching display is only exported left-eye image or eye image simultaneously, and the beholder also need not to wear polaroid glasses and can watch.
The embodiment of the invention is closed in the image update period by the peripheral drive circuit control backlight of LCD in good time, has avoided the right and left eyes image to occur the cross-interference issue that causes simultaneously.Outside surface at liquid crystal light valve is provided with one deck λ/4 wave plates, make it the right and left eyes image is offered the beholder with the form of left-handed and right-handed polarized light, the beholder wears corresponding rotatory polarization glasses can view and admire the 3D picture, has avoided the beholder because the image fault problem that head rotation causes.Increase the driving voltage of liquid crystal light valve, the box that reduces liquid crystal light valve is thick, can improve the picture crosstalk problem that the opening and closing overlong time because of liquid crystal light valve causes.Control by switch and a display left side/right eye signal, can realize the switching of 2D and 3D effect, enriched the function of LCD liquid crystal light valve.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. 3D LCD, described 3D LCD comprises back light unit, display unit, is located at the liquid crystal light valve of described display unit outside, and the peripheral drive circuit that is connected with described back light unit, display unit and liquid crystal light valve, it is characterized in that described liquid crystal light valve is the twisted nematic liquid crystals light valve; Described back light unit is in closed condition when described display unit carries out image update, be in opening when image stabilization; The shut-in time of described back light unit and opening time sum equal the image update time and the image stabilization time sum of described display unit.
2. 3D LCD as claimed in claim 1 is characterized in that, described display unit comprises end polaroid, substrate, liquid crystal layer, the face substrate of fitting successively from inside to outside, and the face polaroid; Described liquid crystal light valve comprises end ITO transparency carrier, the layer of liquid crystal molecule of fitting successively from inside to outside, and goes up the ITO transparency carrier;
The direction of shaking thoroughly of described polaroid is parallel to each other with the frictional direction of described end ITO transparency carrier or is vertical; Described end ITO transparency carrier is vertical mutually with the frictional direction of last ITO transparency carrier.
3. 3D LCD as claimed in claim 2 is characterized in that, described liquid crystal light valve outside is provided with λ/4 wave plates; The described frictional direction of ITO transparency carrier and the optical axis direction angle at 45 of described λ/4 wave plates gone up.
4. 3D LCD as claimed in claim 1 is characterized in that, frame frequency 〉=120Hz that described display unit data refresh.
5. 3D LCD as claimed in claim 1 is characterized in that, the opening time of described back light unit is less than or equal to the image stabilization time of described display unit.
6. 3D liquid crystal display as claimed in claim 1 is a device, it is characterized in that, the opening time of described liquid crystal light valve and shut-in time are respectively less than 8.33ms.
7. 3D LCD as claimed in claim 1 is characterized in that, the box of described liquid crystal light valve is thick to be 1.0～4.0 μ m.
8. 3D LCD as claimed in claim 1 is characterized in that, the image transmission signals of the switch motion of described liquid crystal light valve and described display unit is synchronous, by described peripheral drive circuit control.
9. 3D LCD as claimed in claim 1 is characterized in that, the last ITO transparency carrier and the end ITO transparency carrier of described liquid crystal light valve are whole electrode.
10. a 3D liquid crystal display systems comprises LCD and polaroid glasses, it is characterized in that, described LCD is the described 3D LCD of each claim of claim 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102563559A CN101937147A (en) | 2010-08-18 | 2010-08-18 | 3D liquid crystal display and 3D liquid crystal display system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102563559A CN101937147A (en) | 2010-08-18 | 2010-08-18 | 3D liquid crystal display and 3D liquid crystal display system |
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| CN101937147A true CN101937147A (en) | 2011-01-05 |
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| CN2010102563559A Pending CN101937147A (en) | 2010-08-18 | 2010-08-18 | 3D liquid crystal display and 3D liquid crystal display system |
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| CN102520542A (en) * | 2011-12-29 | 2012-06-27 | 世成电子(深圳)有限公司 | Liquid crystal light valve and manufacture method thereof, as well as pair of 3-dimensional glasses and liquid crystal display equipment |
| CN102654652A (en) * | 2011-03-04 | 2012-09-05 | 深圳市亿思达显示科技有限公司 | Polarizing glasses, polarizing filter, projector and stereoscopic image system |
| CN102654692A (en) * | 2011-03-01 | 2012-09-05 | 陈国平 | Flexible substrate LCD (Liquid Crystal Display) for 3D (Three Dimensional) glasses |
| CN102750881A (en) * | 2012-06-11 | 2012-10-24 | 葛豫卿 | 3D (three dimensional) LED (light-emitting diode) display screen capable of enhancing polarization effect |
| CN103293757A (en) * | 2013-05-30 | 2013-09-11 | 京东方科技集团股份有限公司 | Display device and display system |
| WO2015089926A1 (en) * | 2013-12-17 | 2015-06-25 | 深圳市华星光电技术有限公司 | Backlight control circuit, electronic device and display panel drive method |
| CN106897041A (en) * | 2017-02-22 | 2017-06-27 | 重庆卓美华视光电有限公司 | Interactive teaching method, apparatus and system |
| CN111741282A (en) * | 2020-07-23 | 2020-10-02 | 深圳市安卓安科技有限公司 | Method for realizing 3D effect by combining display screen with shutter 3D glasses |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654692A (en) * | 2011-03-01 | 2012-09-05 | 陈国平 | Flexible substrate LCD (Liquid Crystal Display) for 3D (Three Dimensional) glasses |
| CN102654652A (en) * | 2011-03-04 | 2012-09-05 | 深圳市亿思达显示科技有限公司 | Polarizing glasses, polarizing filter, projector and stereoscopic image system |
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| CN102750881A (en) * | 2012-06-11 | 2012-10-24 | 葛豫卿 | 3D (three dimensional) LED (light-emitting diode) display screen capable of enhancing polarization effect |
| CN103293757A (en) * | 2013-05-30 | 2013-09-11 | 京东方科技集团股份有限公司 | Display device and display system |
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| CN106897041A (en) * | 2017-02-22 | 2017-06-27 | 重庆卓美华视光电有限公司 | Interactive teaching method, apparatus and system |
| CN111741282A (en) * | 2020-07-23 | 2020-10-02 | 深圳市安卓安科技有限公司 | Method for realizing 3D effect by combining display screen with shutter 3D glasses |
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Application publication date: 20110105 |