CN103680457A - Automatic dimming method and device for 3D (Three-dimensional) backlight driving circuit - Google Patents
Automatic dimming method and device for 3D (Three-dimensional) backlight driving circuit Download PDFInfo
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- CN103680457A CN103680457A CN201310746704.9A CN201310746704A CN103680457A CN 103680457 A CN103680457 A CN 103680457A CN 201310746704 A CN201310746704 A CN 201310746704A CN 103680457 A CN103680457 A CN 103680457A
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Abstract
The invention relates to the field of 3D (three-dimensional) display, and discloses an automatic dimming method and device for a 3D backlight driving circuit. The device comprises a picture tester, a pair of SG glasses and a central controller, wherein the picture tester is arranged above a liquid crystal panel to be tested; the pair of SG glasses is positioned between the picture tester and the liquid crystal panel; the picture tester is connected with the central controller; the central controller is connected with a time sequence controller of the liquid crystal panel. The scanning time sequence of backlight driving is adjusted dynamically, thereby adjusting the crosstalk degree of the liquid crystal panel more rapidly and effectively and enhancing the display effect of the 3D display device; in the entire process, manual interference is not needed, thereby achieving high operability and saving the testing cost.
Description
Technical field
The present invention relates to 3D and show field, relate in particular to a kind of 3D backlight drive circuit Automatic adjustment method and device.
Background technology
At present LCD TV realizes 3D(3-D display) method comprise: FPR(Pianguan County sheet mode) and SG(active-shutter).Polarization type 3D technology is also polarization type 3D technology, and English is Polarization3D, and what be used in conjunction with is passive type polaroid glasses.The image effect of polarization type 3D technology is better than aberration formula, and glasses cost is also not very too high, but this technology is higher to the brightness requirement of display device, and it need to attach light polarizing film, therefore require higher backlight illumination guarantee 3D picture distinct, improved TV power consumption; 3D picture interlacing display resolution reduces by half, and plays 3D1080P film and only has 540p.Shutter 3D technology, English is Active Shutter3D, coordinates active shutter 3 D glasses to use.This 3D technology is applied the most extensively at TV with above projector, resource is relatively many, and image effect is outstanding, is subject to a lot of manufacturers and praises highly and adopt, and SG mode is guaranteeing that resolution does not become simultaneously, and cost price is also lower.Active-shutter 3-D display, with its good display effect, more and more becomes the main flow in three-dimensional market.Shutter Glass(shutter glasses) more and more become the main flow in three-dimensional market, but Crosstalk(crosstalks) be the bottleneck of its better performance 3-D display effect of puzzlement always.
Shutter Glass 3-D display is by improving the mode of refresh rate, the view data timesharing interval output that right and left eyes will be seen, then by with the coordinating of shutter glasses, make left eye see the image of left eye, now right eye glasses cut out; Right eye is seen the image of right eye, and now left eye glasses cut out.But because liquid crystal response speed is fast not, picture reaction velocity does not catch up with the refresh rate of glasses, and left eye can be seen the picture of right eye, and right eye can have been seen the picture of left eye.In 3-D display situation, by SG glasses, can see that horizontal diplopia appears in picture.
The SG3D of main flow at least requires the driving of 120Hz panel to realize at present, meanwhile, in order to alleviate crosstalk (Crosstalk) of screen, usually can coordinate scanning backlight, by closing the dynamic response time of avoidance liquid crystal backlight, realizes effect optimum.The quality of scanning backlight effect also directly affects 3D display effect.
In order to overcome the above problems, the present invention has done useful improvement.
Summary of the invention
(1) technical matters that will solve
The object of this invention is to provide a kind of 3D backlight drive circuit Automatic adjustment method and device, can quickly, dynamically adjust scanning backlight sequential, improve the display effect of 3D display device.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of 3D backlight drive circuit Automatic adjustment method, it comprises the following steps:
S1, record the picture brightness value on liquid crystal panel, and send this picture brightness value to central controller;
S2, central controller calculate the picture brightness value of obtaining the crossfire value of liquid crystal panel under current state;
S3, central controller judge the crossfire value of the liquid crystal panel under current state and process accordingly:
S31, when described crossfire value is less than the desired value setting, do not need liquid crystal panel to adjust;
S32, when described crossfire value is greater than desired value, by the backlight drive sequential of time schedule controller adjustable liquid crystal display panel, to reduce the crossfire value of liquid crystal panel, until the crossfire value of liquid crystal panel is transferred to desired value or is approached desired value.
Preferably, after step S32, also comprise step S33, while failing to reach desired value after the crossfire value by time schedule controller adjustable liquid crystal display panel, by backlight controller, reduce the retention time under backlight illuminating state, to reduce the crossfire value of liquid crystal panel, until the crossfire value of liquid crystal panel meets desired value.
Preferably, in step S32, arrange between the regulatory region of backlight and synchronizing signal backlight, backlight is regulated between regulatory region, to find the desired value of crosstalking.
Preferably, on described liquid crystal panel and be positioned on the center line of backlight of its both sides a plurality of test points are set, described test point is carried out to luminance test.
Preferably, in step S32, when the crossfire value of described liquid crystal panel is greater than desired value, by the backlight drive sequential of adjacent test point on time schedule controller while adjustable liquid crystal display panel.
Preferably, in step S32, first increase or reduce the backlight drive sequential of liquid crystal panel, when the crossfire value rising of liquid crystal panel being detected, should reduce or increase the backlight drive sequential of liquid crystal panel, when the crossfire value reduction of liquid crystal panel being detected, continue to increase or reduce the backlight drive sequential of liquid crystal panel, until the crossfire value of liquid crystal panel is transferred to desired value or is approached desired value.
Preferably, described desired value is a numerical value or numerical range.
The present invention also provides a kind of self-checking device for above-mentioned 3D backlight drive circuit Automatic adjustment method, it comprises picture tester, SG glasses and central controller, described picture tester is placed in the top of liquid crystal panel to be measured, described SG glasses are between picture tester and liquid crystal panel, described picture tester is connected with central controller, and described central controller is connected with the time schedule controller of liquid crystal panel.
Preferably, also comprise backlight controller, described backlight controller is connected with central controller with the circuit board of liquid crystal panel respectively.
(3) beneficial effect
A kind of 3D backlight drive circuit Automatic adjustment method and device that technique scheme provides, picture tester is by the picture brightness value of spectacle measuring test solution crystal panel, and measured picture brightness value is sent to central controller, the time schedule controller of central controller controls liquid crystal panel is dynamically adjusted the sequential that scanning backlight drives, can more fast and effeciently adjust the degree of crosstalk of liquid crystal panel, improve the display effect of 3D display device; The present invention is simple in structure, and whole process is without manual intervention, and strong operability, has saved testing cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the self-checking device of 3D backlight drive circuit of the present invention;
Fig. 2 is liquid crystal panel schematic diagram of the present invention;
Fig. 3 is the process flow diagram of the Automatic adjustment method of 3D backlight drive circuit of the present invention;
Fig. 4 is that the present invention adjusts front default backlight drive sequential chart;
Fig. 5 is the backlight drive sequential chart after the present invention adjusts;
Fig. 6 is the process flow diagram of the preferred embodiment of the present invention.
In figure: 1, liquid crystal panel; 2, circuit board; 3, picture tester; 4, central controller; 5, time schedule controller; 6, SG glasses; 7, backlight.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is made a detailed explanation.
It is pointed out that the backlight that 3D backlight drive circuit of the present invention adopts is LED lamp bar, in the relative both sides of liquid crystal panel, many LED lamp bars are set respectively.
As illustrated in fig. 1 and 2, the embodiment of the present invention provides a kind of self-checking device of 3D backlight drive circuit, comprise picture tester 3, SG glasses 6 and in (shutter glasses) centre controller 4, picture tester 3 is placed in the top of liquid crystal panel to be measured 1, SG glasses are between picture tester and liquid crystal panel, picture tester 3 passes through the picture brightness value of SG glasses 6 test fluid crystal panel 1, and measured picture brightness value is sent to central controller 4; Central controller 4 is connected with the time schedule controller 5 of liquid crystal panel 1, and time schedule controller 5 is located on the circuit board 2 of liquid crystal panel 1.
Central controller 4 is prior art, is provided with microprocessor module and other in it, and its picture brightness value according to obtained liquid crystal panel calculates crossfire value, then judges; And transmit conditioning signal to the time schedule controller 5(T-con chip on liquid crystal panel 1 by data line), the sequential that regulates scanning backlight to drive by this time schedule controller 5, regulate time interval between backlight 7 and synchronizing signal backlight (T1, T2 ...), regulate the opening time of backlight, and then reduce crossfire value.This adjusting gear can be fast, effectively, dynamically automatically adjust the degree of crosstalk of liquid crystal panel 1.
Adopt above-mentioned time schedule controller 5 to finely tune the degree of crosstalk of liquid crystal panel 1, not obvious for the situation regulating effect that crossfire value is too large, preferably, the regulating device of the preferred embodiment of the present invention also comprises backlight controller (not shown), this backlight controller is connected with central controller 4 with the circuit board 2 of liquid crystal panel 1 respectively, for when time schedule controller 5 cannot be reduced to desired value by the crossfire value of liquid crystal panel 1, can reduce the retention time Td under the backlight illuminating state of liquid crystal panel 1 by this backlight controller, because the duration that backlight is lighted is longer, it crosstalks more serious, therefore, generally need to reduce duration that backlight lights and reduce the crossfire value of liquid crystal panel, until the crossfire value of liquid crystal panel 1 meets desired value.
As shown in Figure 3, the embodiment of the present invention also provides a kind of Automatic adjustment method of the self-checking device based on technique scheme 3D backlight drive circuit, and the method specifically comprises the following steps:
S1, record the picture brightness value on liquid crystal panel, and send this picture brightness value to central controller;
Be specially: above liquid crystal panel, place picture tester, and place SG glasses between this liquid crystal panel and picture tester, picture tester is tested the picture brightness value of this liquid crystal panel by SG glasses, and this picture brightness value is sent to central controller.Adopt picture tester by SG glasses, to carry out the picture brightness value of test fluid crystal panel, approach 3D display practical service environment, guaranteed test and the accuracy regulating.
S2, central controller calculate the picture brightness value of obtaining the crossfire value of liquid crystal panel under current state;
Be specially: central controller is prior art, be provided with microprocessor module and other in it, this central controller calculates according to the picture brightness value of the liquid crystal panel that obtains from picture tester, draws the crossfire value of liquid crystal panel.
S3, central controller judge the crossfire value of the liquid crystal panel under current state and process accordingly:
S31, when described crossfire value is less than the desired value setting, do not need liquid crystal panel to adjust;
S32, when described crossfire value is greater than desired value, by the backlight drive sequential of time schedule controller adjustable liquid crystal display panel, regulate time interval between backlight and synchronizing signal backlight (T1, T2 ...), to reduce the crossfire value of liquid crystal panel, until the crossfire value of liquid crystal panel is transferred to desired value or is approached desired value.First increase or reduce the backlight drive sequential of liquid crystal panel, when the crossfire value rising of liquid crystal panel being detected, should reduce or increase the backlight drive sequential of liquid crystal panel, when the crossfire value reduction of liquid crystal panel being detected, continue to increase or reduce the backlight drive sequential of liquid crystal panel, until the crossfire value of liquid crystal panel is transferred to desired value or is approached desired value.When adopting time schedule controller to regulate the time of backlight with respect to synchronizing signal unlatching backlight, picture tester is tested the picture brightness value of liquid crystal panel now and is sent to central controller by SG glasses, central controller can calculate liquid crystal panel crossfire value now fast, in time, and the crossfire value after this adjusting and desired value are compared.
As shown in Figure 2, for the convenient degree of crosstalk that regulates whole liquid crystal panel, preferably, on liquid crystal panel and be positioned on the center line of backlight of its both sides, arrange a plurality of test points (P1, P2 ...), test point is carried out to luminance test.Because crossfire value between two adjacent test points can influence each other, therefore, in step S32, when test is greater than the desired value of setting to the current crossfire value of liquid crystal panel, can be by the backlight drive sequential of adjacent test point on time schedule controller while adjustable liquid crystal display panel.
In step S32, arrange between the regulatory region of backlight and synchronizing signal backlight, backlight is regulated between this regulatory region, to find the desired value of crosstalking, can avoid repeatedly regulating the unhandy problem causing.
Adopt above-mentioned time schedule controller 5 to finely tune the degree of crosstalk of liquid crystal panel 1, not obvious for its regulating effect of situation that crossfire value is too large, therefore, after the step S32 of the embodiment of the present invention, also comprise step S33, while failing to reach desired value after the crossfire value by time schedule controller adjustable liquid crystal display panel, now, can reduce the retention time Td under backlight illuminating state by backlight controller, to reduce the crossfire value of liquid crystal panel, until the crossfire value of liquid crystal panel meets desired value, backlight controller is the time interval regulating between backlight and synchronizing signal backlight, picture tester is tested the picture brightness value of liquid crystal panel now and is sent to central controller by SG glasses, central controller can be quick, calculate in time liquid crystal panel crossfire value now, and the crossfire value after this adjusting and desired value are compared.
Desired value of the present invention can be a numerical value or numerical range.
The numerical range of take below illustrates the Automatic adjustment method of 3D backlight drive circuit of the present invention as example as desired value, and 6 test points (being followed successively by P1, P2, P3, P4, P5, P6) are set on liquid crystal panel, as shown in Figure 2, the both sides of each test point arrange respectively a LED lamp bar, under these six test point current states, the time interval of corresponding LED lamp bar respectively and between synchronizing signal backlight is: T1, T2, T3, T4, T5, T6, retention time Td under LED lamp bar illuminating state corresponding to each test point is identical, as shown in Figure 4.
As shown in Figure 6, after the crossfire value of test point P1 of the judgement liquid crystal panel minimum value higher than the desired value setting, first by time schedule controller, regulate the test point P1 LED lamp bar corresponding with P2 with respect to the opening time of synchronizing signal backlight, and then reduce this test point P1 crossfire value, also regulate the crossfire value of test point P2 simultaneously, because when regulating test point P1, its adjacent test point P2 also can be subject to same interference, therefore, should regulate the crossfire value of test point P1 and P2 simultaneously; When the crossfire value of test point P1 and P2 being all transferred to desired value or being approached after desired value, continuation regulates P2, P3, P4, P5, P6 and adjacent test point thereof, until the crossfire value of all test point P1, P2, P3, P4, P5, P6 is all transferred to desired value or is approached desired value; The time interval of six the corresponding LED lamp of test point bars after adjusting respectively and between synchronizing signal backlight is T11, T21, T31, T41, T51, T61, as shown in Figure 5.
In the process that adopts time schedule controller to regulate crosstalking of liquid crystal panel, first by the corresponding LED lamp bar of test point, the time interval respectively and between synchronizing signal backlight increases or reduces, when the crossfire value rising of this test point again being detected, should reduce or increase the corresponding time interval of this test point, when the crossfire value reduction of this test point again being detected, continue increase or reduce the corresponding time interval of this test point, until the crossfire value of this point is transferred to desired value or is approached desired value.
When the crossfire value of the test point of liquid crystal panel being transferred to desired value or desired value by time schedule controller when following, can reduce the retention time Td under the LED lamp bar illuminating state of test point by backlight controller, be generally the retention time simultaneously regulating under the illuminating state of each test point.
3D backlight drive circuit Automatic adjustment method of the present invention and device, picture tester is by the picture brightness value of spectacle measuring test solution crystal panel, and measured picture brightness value is sent to central controller, the time schedule controller of central controller controls liquid crystal panel is dynamically adjusted the sequential that scanning backlight drives, can more fast and effeciently adjust the degree of crosstalk of liquid crystal panel, improve the display effect of 3D display device; The present invention is simple in structure, and whole process is without manual intervention, and strong operability, has saved testing cost.
Above embodiment is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (9)
1. a 3D backlight drive circuit Automatic adjustment method, is characterized in that, comprises the following steps:
S1, record the picture brightness value on liquid crystal panel, and send this picture brightness value to central controller;
S2, central controller calculate the picture brightness value of obtaining the crossfire value of liquid crystal panel under current state;
S3, central controller judge the crossfire value of the liquid crystal panel under current state and process accordingly:
S31, when described crossfire value is less than the desired value setting, do not need liquid crystal panel to adjust;
S32, when described crossfire value is greater than desired value, by the backlight drive sequential of time schedule controller adjustable liquid crystal display panel, to reduce the crossfire value of liquid crystal panel, until the crossfire value of liquid crystal panel is transferred to desired value or is approached desired value.
2. 3D backlight drive circuit Automatic adjustment method as claimed in claim 1, it is characterized in that, after step S32, also comprise step S33, while failing to reach desired value after the crossfire value by time schedule controller adjustable liquid crystal display panel, by backlight controller, reduce the retention time under backlight illuminating state, to reduce the crossfire value of liquid crystal panel, until the crossfire value of liquid crystal panel meets desired value.
3. 3D backlight drive circuit Automatic adjustment method as claimed in claim 1, is characterized in that, in step S32, arranges between the regulatory region of backlight and synchronizing signal backlight, backlight is regulated between regulatory region, to find the desired value of crosstalking.
4. 3D backlight drive circuit Automatic adjustment method as claimed in claim 1, is characterized in that, on described liquid crystal panel and be positioned on the center line of backlight of its both sides a plurality of test points are set, described test point is carried out to luminance test.
5. 3D backlight drive circuit Automatic adjustment method as claimed in claim 4, it is characterized in that, in step S32, when the crossfire value of described liquid crystal panel is greater than desired value, by the backlight drive sequential of adjacent test point on time schedule controller while adjustable liquid crystal display panel.
6. the 3D backlight drive circuit Automatic adjustment method as described in claim 1-5 any one, it is characterized in that, in step S32, first increase or reduce the backlight drive sequential of liquid crystal panel, when the crossfire value rising of liquid crystal panel being detected, should reduce or increase the backlight drive sequential of liquid crystal panel, when the crossfire value reduction of liquid crystal panel being detected, continue to increase or reduce the backlight drive sequential of liquid crystal panel, until the crossfire value of liquid crystal panel is transferred to desired value or is approached desired value.
7. the 3D backlight drive circuit Automatic adjustment method as described in claim 1-5 any one, is characterized in that, described desired value is a numerical value or numerical range.
8. the self-checking device for 3D backlight drive circuit Automatic adjustment method described in claim 1-7 any one, it is characterized in that, comprise picture tester, SG glasses and central controller, described picture tester is placed in the top of liquid crystal panel to be measured, described SG glasses are between picture tester and liquid crystal panel, described picture tester is connected with central controller, and described central controller is connected with the time schedule controller of liquid crystal panel.
9. 3D backlight drive circuit self-checking device as claimed in claim 8, is characterized in that, also comprises backlight controller, and described backlight controller is connected with central controller with the circuit board of liquid crystal panel respectively.
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| CN105915884A (en) * | 2016-06-06 | 2016-08-31 | 乐视控股（北京）有限公司 | Method for preventing display terminal 3D crosstalk and system thereof |
| CN105989815A (en) * | 2015-06-05 | 2016-10-05 | 乐视致新电子科技（天津）有限公司 | Head-mounted 3D display, brightness adjustment system and method |
| CN107018397A (en) * | 2016-01-08 | 2017-08-04 | 罗伯特·博世有限公司 | Method and apparatus for running visual field display device |
| CN109391813A (en) * | 2018-11-29 | 2019-02-26 | 张家港康得新光电材料有限公司 | A kind of detection method, device and the equipment of 3D display device |
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| CN103680457B (en) | 2015-09-23 |
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