CN102591066A - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN102591066A CN102591066A CN2012100946758A CN201210094675A CN102591066A CN 102591066 A CN102591066 A CN 102591066A CN 2012100946758 A CN2012100946758 A CN 2012100946758A CN 201210094675 A CN201210094675 A CN 201210094675A CN 102591066 A CN102591066 A CN 102591066A
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Abstract
A Liquid crystal display device comprises a backlight module and a control unit, wherein the control unit is used for controlling the backlight module to regulate the opening time and the light intensity of a backlight light source in terms of the brightness difference between a left eye image and a right eye image, so as to balance the brightness of the left eye image and the right eye image and improve crosstalk disturbance. The liquid crystal display device regulates the opening time and the light intensity of the backlight light source in terms of the brightness difference between the left eye image and the right eye image, so as to balance the brightness of the left eye image and the right eye image and reduce crosstalk disturbance.
Description
Technical field
The invention relates to a kind of liquid crystal indicator, but and particularly relevant for the brightness of a kind of balance right and left eyes and reduce the liquid crystal indicator of cross-talk (crosstalk).
Background technology
Fig. 1 is the synoptic diagram of known three-dimensional display system.Three-dimensional display system 100 comprises a LCD 102 (it comprises backlight module and polaroid) and a liquid crystal polarisation panel 104, and wherein liquid crystal polarisation panel 104 is disposed at LCD 102 the place aheads.LCD 102 can send and have the specific polarization angle image of (for example 45 degree), the polarization angle (for example it being adjusted into 135 degree) of the image that liquid crystal polarisation panel 104 then can be sent according to polarisation controlling signal adjustment LCD 102.(polarization angle that for example makes left-eye images is 135 degree so to continue to provide the right and left eyes image with different polarization angle by LCD 102 and liquid crystal polarisation panel 104; And the polarization angle of right-eye image is 45 degree); The observer only need wear the display effect that polaroid glasses 106 (its left eye only receives the image that polarization angle is 135 degree, and right eye then only receives the image that polarization angle is 45 degree) can watch 3 D stereo.
Fig. 2 is the sequential synoptic diagram of known three-dimensional display system control back light.As shown in Figure 2, the backlight control mode of existing LCD 102 is that (Vertical Blanking Interval, VBI) time opens backlight, that is D1 is backlight between the transmission period of video data closes during vertical blanking.Liquid crystal polarisation panel 104 just can begin transition after receiving the polarisation controlling signal; Let and do the polarised direction change through the light of liquid crystal polarisation panel 104; Wherein the polarisation controlling signal drives liquid crystal polarisation panel 104 with different accurate positions, takes place with the situation of avoiding the liquid crystal polarization.Because the liquid crystal transition property class in the liquid crystal polarisation panel 104 is like a resistance capacitance (Resistance Capacitance; RC) charged state; That is liquid crystal can slowly rotate to the state that just can arrive complete transition behind the certain hour; When liquid crystal was not accomplished transition, the polarization angle of light did not reach best angle, caused the image of left eye and right eye cross-talk phenomenon (Crosstalk) to occur.In addition; Because the speed that liquid crystal is replied virgin state is fast than the speed that it is carried out transition by driven; Therefore left-eye images can't take place like the situation that right-eye image has the polarization angle of light not reach best angle, and so this difference will cause the audience to experience the unbalanced problem of right and left eyes image brilliance.
Summary of the invention
The present invention provides a kind of liquid crystal indicator, but balance right and left eyes image brilliance and reduce cross-talk.
The present invention proposes a kind of liquid crystal indicator, in order to Alternation Display one left-eye images and a right-eye image, to show a 3-dimensional image.Liquid crystal indicator comprises a backlight module and a control module.Wherein backlight module provides a back light.Control module couples backlight module, adjusts the opening time and the light intensity of back light according to the luminance difference control backlight module of left-eye images and right-eye image.
In one embodiment of this invention, above-mentioned control module is a benchmark with the higher a glance image of brightness in left-eye images and the right-eye image more, and the control backlight module is delayed another eye shadow as opening time of pairing back light and strengthen its light intensity.
The power that is consumed when in one embodiment of this invention, above-mentioned backlight module provides the back light of left-eye images and right-eye image is identical.
In one embodiment of this invention, above-mentioned control module is a benchmark with the darker a glance image of brightness in left-eye images and the right-eye image more, and the control backlight module reduces the light intensity of another eye shadow as pairing back light.
In one embodiment of this invention, the darker a glance image of brightness in above-mentioned left-eye images and the right-eye image, its liquid crystal transition required time is longer.
In one embodiment of this invention, above-mentioned control module is more controlled opening time and the light intensity that backlight module is adjusted left-eye images and the pairing back light of right-eye image simultaneously.
In one embodiment of this invention; Above-mentioned control module is more controlled the opening time that backlight module is delayed left-eye images and the pairing back light of right-eye image simultaneously, and strengthens the light intensity of left-eye images and the pairing back light of right-eye image respectively according to the luminance difference of left-eye images and right-eye image.
In one embodiment of this invention; Above-mentioned control module is more controlled the opening time that backlight module is delayed left-eye images and the pairing back light of right-eye image simultaneously, and reduces the light intensity of left-eye images and the pairing back light of right-eye image respectively according to the luminance difference of left-eye images and right-eye image.
In one embodiment of this invention, above-mentioned liquid crystal indicator more comprises a display panels and a liquid crystal polarisation panel.Wherein display panels couples control module, is controlled by control module and shows left-eye images and right-eye image.Liquid crystal polarisation panel couples control module, is controlled by control module and adjusts the polarization angle of left-eye images and right-eye image.
Based on above-mentioned, the present invention adjusts the opening time and the light intensity of back light according to the luminance difference of left-eye images and right-eye image, with the brightness of balance left-eye images and right-eye image and reduce cross-talk.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended graphic elaborating as follows.
Description of drawings
Fig. 1 is the synoptic diagram of known three-dimensional display system.
Fig. 2 is the sequential synoptic diagram of known three-dimensional display system control back light.
Fig. 3 is the synoptic diagram of the liquid crystal indicator of one embodiment of the invention.
Fig. 4 is the sequential synoptic diagram of known back light control.
Fig. 5 is the sequential synoptic diagram of the back light control of one embodiment of the invention.
Fig. 6 is the sequential synoptic diagram of the back light control of another embodiment of the present invention.
Among the figure: 100-three-dimensional display system, 102-LCD, 104,308-liquid crystal polarisation panel, 106-polaroid glasses; 300-liquid crystal indicator, 302-control module, 304-backlight module, 306-display panels; Between the transmission period of D1-video data, during VBI-vertical blanking, SYN1-sync signal, LR1-right and left eyes image signal; PWM1-pulse width modulation signal, CC1-Current Control signal, SW1-mode switching signal.
Embodiment
Fig. 3 is the synoptic diagram of the liquid crystal indicator of one embodiment of the invention.Liquid crystal indicator 300 comprises a control module 302, a backlight module 304, a display panels 306 and a liquid crystal polarisation panel 308, and control module 302 couples backlight module 304, display panels 306 and liquid crystal polarisation panel 308.Wherein backlight module 304 is in order to provide display panels 306 display frames required back light, and display panels 306 is controlled by control module and shows left-eye images and right-eye image.In detail; Control module 302 can be exported a pulse width modulation signal PWM1 and a Current Control signal CC1 to backlight module 304 according to a synchronous signal SYN1 and a right and left eyes image signal LR1, with the opening time and the light intensity of control backlight module 304 adjustment back lights.Wherein pulse width modulation signal PWM1 is in order to the opening time of control back light, and Current Control signal CC1 is then in order to control the light intensity of back light.
In addition; Control module 302 more can be controlled the left-eye images of liquid crystal polarisation panel 308 adjustment display panels 306 demonstrations and the polarization angle of right-eye image according to sync signal SYN1 and right and left eyes image signal LR1; Alternately receive left-eye images and right-eye image so that wear the user of polaroid glasses, and then watch the display effect of 3 D stereo.In addition, it should be noted that in part embodiment that liquid crystal indicator 300 is not defined as and is used for 3-D display, it also can be switched to and be used for the two dimension demonstration.That is control module 302 can come the operating mode of switchable liquid crystal display panel 306 and liquid crystal polarisation panel 308 according to a mode switching signal SW1, liquid crystal indicator 300 is switched to two dimensional mode or 3-D display pattern.
Fig. 4 is the sequential synoptic diagram of known back light control.Fig. 5 is the sequential synoptic diagram of the back light control of one embodiment of the invention.The liquid crystal indicator 300 balance right and left eyes image brilliances and the means that reduce cross-talk that below will cooperate Fig. 4, Fig. 5 key diagram 3.As shown in Figure 4, known techniques is when providing right-eye image and left-eye images back light, and right-eye image does not have different with pairing backlight open time point of left-eye images and backlight intensity.Right in back light just is not unlocked when the liquid crystal of right-eye image in liquid crystal polarisation panel 308 also accomplished transition; Therefore the right-eye image person's of being used who will some polarization angle convert as yet left eye receives (shown in Fig. 4 elliptic region), so promptly can cause the phenomenon generation of right and left eyes image brilliance inequality.In addition, user's the left eye situation that the receives right-eye image problem that also has a cross-talk (cross talk) produces.
For improving the problems referred to above; The control module 302 of Fig. 1 embodiment of the present invention can be adjusted the opening time and the light intensity of back lights according to the luminance difference control backlight module 304 of left-eye images and right-eye image, with effective problem of improving right and left eyes image brilliance inequality and cross-talk.As shown in Figure 5; Also do not accomplish the problem that transition reduces left-eye images brightness in order to improve right-eye image among Fig. 4 because of the liquid crystal in the liquid crystal polarisation panel 308; Control module 302 can left-eye images brightness be benchmark, control backlight module 304 is delayed the opening time of the pairing back light of right-eye image and is strengthened the light intensity of back light.Can find out by Fig. 5; By the opening time of the pairing back light of right-eye image is delayed; The received right-eye image of audience's left eye is significantly reduced, and the light intensity that strengthens the pairing back light of right-eye image then can remedy the luminance difference of right and left eyes image.Wherein, owing to the received right-eye image of audience's left eye significantly reduces, so the problem of cross-talk also is enhanced significantly.
It should be noted that the foregoing description is that to set right-eye image be the darker image of brightness, so this is merely an exemplary embodiment, and one possibly be the darker image of brightness for left-eye images in practical application.In addition, in part embodiment, increase for avoiding consumed power, the power that control module 302 control backlight modules 304 are consumed when right and left eyes image back light is provided is identical.Though so the effect of balance right and left eyes image brilliance is slightly subtracted, so can exchange the advantage of saving power supply energy for.
Moreover; The embodiment of Fig. 5 is for being benchmark with the higher a glance image of brightness in left-eye images and the right-eye image; Control backlight module 304 is delayed another eye shadow as opening time of pairing back light and strengthen its light intensity, to reach balance right and left eyes image brilliance and the purpose of improving cross-talk.Right can also left-eye images in part embodiment with right-eye image in the lower a glance image of brightness be benchmark, control backlight module 304 reduces the light intensity of another eye shadows as pairing back light, the effect that also can reach balance right and left eyes image brilliance like this.It is noted that,, still must delay the opening time of the lower pairing back light of a glance image of brightness in left-eye images and the right-eye image if desire to improve simultaneously the problem of cross-talk.
In addition; In part embodiment; Also can make control module 302 control backlight modules 304 make the opening time and the light intensity of adjustment left-eye images and the pairing back light of right-eye image simultaneously; To solve the problem of right and left eyes image brilliance inequality and cross-talk, also can adjust the brightness of its 3-dimensional image of seeing simultaneously according to audience's demand.For instance, Fig. 6 is the sequential synoptic diagram of the back light control of another embodiment of the present invention.In the present embodiment; Control module 302 control backlight modules 304 are delayed the opening time of right-eye image and the pairing back light of left-eye images; And strengthen the light intensity of left-eye images and the pairing back light of right-eye image respectively according to the luminance difference of left-eye images and right-eye image; With in the problem that solves right and left eyes image brilliance inequality and cross-talk, the brightness that improves audience's the 3-dimensional image of being seen, and then improve and view and admire quality.
In like manner; Also can make control module 302 control backlight modules 304 delay the opening time of right-eye image and the pairing back light of left-eye images; And reduce the light intensity of left-eye images and the pairing back light of right-eye image respectively according to the luminance difference of left-eye images and right-eye image; With in the problem that solves right and left eyes image brilliance inequality and cross-talk, reduce the brightness of audience's the 3-dimensional image of being seen.
In sum, the present invention adjusts the opening time and the light intensity of back light according to the luminance difference of left-eye images and right-eye image, with the brightness of balance left-eye images and right-eye image and reduce cross-talk.In part embodiment, can delay the opening time of right-eye image and the pairing back light of left-eye images simultaneously; And strengthen the light intensity of left-eye images and the pairing back light of right-eye image respectively according to the luminance difference of left-eye images and right-eye image; With the brightness of the 3-dimensional image of being seen that improves the audience, and then improve and view and admire quality.Also or; Delay the opening time of right-eye image and the pairing back light of left-eye images simultaneously; And reduce the light intensity of left-eye images and the pairing back light of right-eye image respectively according to the luminance difference of left-eye images and right-eye image, to reduce the loss of power.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; Do not breaking away from the spirit and scope of the present invention, when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (10)
1. liquid crystal indicator, to show a 3-dimensional image, is characterized in that this liquid crystal indicator comprises in order to Alternation Display one left-eye images and a right-eye image:
One backlight module provides a back light; And
One control module couples this backlight module, adjusts the opening time and the light intensity of this back light according to this backlight module of luminance difference control of this left-eye images and this right-eye image.
2. liquid crystal indicator according to claim 1; It is characterized in that: this control module is a benchmark with the higher a glance image of brightness in this left-eye images and this right-eye image more, controls this backlight module and delays another eye shadow as opening time of pairing this back light and strengthen its light intensity.
3. liquid crystal indicator according to claim 2 is characterized in that: the darker a glance image of brightness in this left-eye images and this right-eye image, its liquid crystal transition required time is longer.
4. liquid crystal indicator according to claim 2 is characterized in that: the power that this backlight module is consumed when this back light of this left-eye images and this right-eye image is provided is identical.
5. liquid crystal indicator according to claim 1; It is characterized in that: this control module is a benchmark with the darker a glance image of brightness in this left-eye images and this right-eye image more, controls this backlight module and reduces the light intensity of another eye shadow as pairing this back light.
6. liquid crystal indicator according to claim 5 is characterized in that: the darker a glance image of brightness in this left-eye images and this right-eye image, its liquid crystal transition required time is longer.
7. liquid crystal indicator according to claim 1 is characterized in that: this control module is more controlled opening time and the light intensity that this backlight module is adjusted this left-eye images and pairing this back light of this right-eye image simultaneously.
8. liquid crystal indicator according to claim 7; It is characterized in that: this control module is more controlled the opening time that this backlight module is delayed this left-eye images and pairing this back light of this right-eye image simultaneously, and strengthens the light intensity of this left-eye images and pairing this back light of this right-eye image respectively according to the luminance difference of this left-eye images and this right-eye image.
9. liquid crystal indicator according to claim 7; It is characterized in that: this control module is more controlled the opening time that this backlight module is delayed this left-eye images and pairing this back light of this right-eye image simultaneously, and reduces the light intensity of this left-eye images and pairing this back light of this right-eye image respectively according to the luminance difference of this left-eye images and this right-eye image.
10. liquid crystal indicator according to claim 1 is characterized in that, more comprises:
One display panels couples this control module, is controlled by this control module and shows this left-eye images and this right-eye image; And a liquid crystal polarisation panel, couple this control module, be controlled by this control module and adjust the polarization angle of this left-eye images and this right-eye image.
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| CN201210094675.8A CN102591066B (en) | 2012-03-31 | 2012-03-31 | Liquid crystal indicator |
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| CN201210094675.8A CN102591066B (en) | 2012-03-31 | 2012-03-31 | Liquid crystal indicator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103916651A (en) * | 2013-01-08 | 2014-07-09 | 东莞万士达液晶显示器有限公司 | Three-dimensional image system capable of balancing left-eye image brightness and right-eye image brightness and relevant drive method |
| WO2018133136A1 (en) * | 2017-01-19 | 2018-07-26 | 深圳市华星光电技术有限公司 | Backlight control circuit and electronic device |
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| CN101860766A (en) * | 2010-05-05 | 2010-10-13 | 华映视讯（吴江）有限公司 | Stereoscopic picture plane display method and 3 d display device thereof |
| CN102263970A (en) * | 2010-05-31 | 2011-11-30 | 索尼公司 | Display device, display method and computer program |
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| CN103916651A (en) * | 2013-01-08 | 2014-07-09 | 东莞万士达液晶显示器有限公司 | Three-dimensional image system capable of balancing left-eye image brightness and right-eye image brightness and relevant drive method |
| WO2018133136A1 (en) * | 2017-01-19 | 2018-07-26 | 深圳市华星光电技术有限公司 | Backlight control circuit and electronic device |
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