CN1731498A - Liquid crystal driving system and method - Google Patents
Liquid crystal driving system and method Download PDFInfo
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- CN1731498A CN1731498A CN 200510091047 CN200510091047A CN1731498A CN 1731498 A CN1731498 A CN 1731498A CN 200510091047 CN200510091047 CN 200510091047 CN 200510091047 A CN200510091047 A CN 200510091047A CN 1731498 A CN1731498 A CN 1731498A
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Abstract
The invention provides a liquid crystal plane driving method. The first presetting grey signal designs the display grey of the element in the front picture; while the second presetting grey signal designs the display grey of the element in the current picture. The driving method comprises: a) comparing weather the second presetting grey signal is equal to the first presetting grey signal. b) If it equals to the first presetting grey signal, it uses a persistent mode to drive the element in the current picture; if not, it uses a pulse mode to drive the element in the current picture.
Description
Technical field
The present invention relates to a kind of driving method and drive system of liquid crystal panel, particularly a kind of apply pulse pattern (impulse type) drives the method and system of liquid crystal panel.
Background technology
The main advantage of LCD is to reach easily high display resolution and display slimming, therefore widely be used in mobile computer in, recently along with the lasting exploitation of large size panel, LCD also becomes the main flow of desktop PC display.
Please refer to Fig. 1, Fig. 1 is the parent map of LCD 10.Wherein, liquid crystal panel 12 has a plurality of pixels (pixel) 121, utilizes each pixel 121 liquid crystal molecule is wherein applied a specific driving voltage, can change the anglec of rotation of liquid crystal molecule.Liquid crystal molecule has the function of light valve (lightvalve), utilizes the control liquid crystal molecule anglec of rotation, then the transmissivity of the light that provided of controlling back light source 14.Thus, the light that the backlight 14 of liquid crystal panel 12 belows is provided can be because of different transmissivities in the different pixel 121 of liquid crystal panel 12, and present different gray scales, and then interweave and form " picture " watched for the user.
Generally speaking, in computing machine (as above-mentioned mobile computer and desktop PC), the demonstration of picture is more with the situation of " static state " substantially.So-called " static state " is meant that (or claim frame: current frame) all show identical gray scale with a previous picture (previous frame), wherein, current picture is connected in previous picture to a pixel 121 at a current picture.For example, utilize computing machine to carry out under the situation of documentor, each pixel 121 in the picture is in the majority with the situation of static state, and just the pairing pixel 121 of the literal of being keyed in then belongs to " dynamically ".So-called " dynamically ", be meant that a pixel 121 shows gray scale inequality at current picture and previous picture.For example, the picture of televisor shows that situation is in the majority with " dynamically ", perhaps, when utilizing computing machine to come movie or animation, also is " dynamically " situation in the majority.
The display characteristic of LCD 10 is suitable for the situation of " static state ".The image control of LCD 10 is to utilize the liquid crystal molecule of liquid crystal panel 12 is bestowed specific driving voltage.Typical liquid crystal drive voltage can be with reference to Fig. 2 A, and it is in an image time (frame time), keeps and fixes a magnitude of voltage, and this mode belongs to " continuous-mode (hold type) ".With the LCD 10 that " continuous-mode " drives, normally utilize a storage capacitors to remember the magnitude of voltage of living driving voltage, import this storage capacitors once more until the driving voltage of next picture.
Shown in Fig. 2 A, in an image time, to keep under the situation of same magnitude of voltage, the brightness of human eye perceives is proportional to the integration of brightness to the time.Therefore, the LCD 10 that drives with " continuous-mode " is when showing " dynamically " picture, because therefore the principle that human eye vision persists has the phenomenon generation of smear easily.Human eye when observing next picture, feels that easily the gray scale of a last picture still exists easily.
Please refer to Fig. 2 B, show the driving voltage of pulse mode.With respect to " continuous-mode ", the type of drive that another kind is applied to the image demonstration is " pulse mode (impulse type) "." pulse mode " is common in traditional televisor or cathode ray tube (CRT) display, because the sweep velocity of televisor or CRT monitor electron beam wherein is very fast, therefore in a picture, only utilize pulse once usually, and cooperate the intensity of electron beam to control its display brightness.The brightness that human eye is discovered is the integrated value of brightness to the time, and therefore the brightness integrated value is identical in image time, and then the person of looking that human eye is distinguished is same gray scale.Anticipate promptly, if identical, then the viewed grey scale change situation of human eye will be the same with the brightness integrated value of Fig. 2 B in same image time for Fig. 2 A.
Yet different is that shown in Fig. 2 B, under " pulse mode ", in an image time, owing to the high sweep velocity of electron beam, so brightness is the initial stage that occurs in each image time.Thus, between picture and picture, particularly when showing " dynamically " picture, aforesaid smear phenomenon is difficult for producing.This is that picture and picture can be separated and come because under " pulse mode ", and the brightness of previous picture is difficult for influencing because of persistence of vision the observation of the present picture of human eye.
" pulse mode " is mainly used in televisor or the CRT monitor, liquid crystal display applications " pulse mode " also arranged at present to drive liquid crystal molecule, mainly is to be applied in the LCD TV product." pulse mode " though LCD can improve the shortcoming of face in its in " dynamically " daytime, yet, in the performance of " static state " picture, have the shortcoming of easy flicker, therefore be difficult for being applied in the required display of computing machine.The shortcoming of this flicker also is the common problem of conventional television or CRT monitor.
Comprehensive the above, how to make LCD all can take into account with " static state " two kinds of situations in " dynamically ", promptly when " static state " picture, do not produce flicker, and smear does not appear when " dynamically " picture, and make LCD can be applicable to the display of computing machine and can be applicable to the LCD TV product simultaneously, be the primary developing direction of current techniques.
Summary of the invention
Fundamental purpose of the present invention is to improve known liquid crystal panel is easy to generate smear when " dynamically " picture problem.
Another object of the present invention is to provide a kind of apply pulse pattern to drive the method for liquid crystal panel, to improve smear problem.
Another object of the present invention is to avoid the problem of the tableaux flicker that pulse mode causes.
Another purpose of the present invention is to provide a kind of and shows the liquid crystal drive system that excellent usefulness is all arranged for dynamic and tableaux.
The driving method of liquid crystal panel provided by the present invention.Wherein, one first predetermined grey scale signal determines a pixel to answer gray-scale displayed when a previous picture, and one second is scheduled to grey scale signal determines this pixel to answer gray-scale displayed when a current picture.This driving method comprises: a) relatively whether this second predetermined grey scale signal is equal to this first predetermined grey scale signal.B) if identical, then when current picture, drive this pixel with a continuous-mode; If different, then when current picture, drive this pixel with a pulse mode.
Liquid crystal drive system provided by the present invention, it receives picture signal, comprises the first predetermined grey scale signal and the second predetermined grey scale signal that continues, and determines pixel gray-scale displayed of answering when a previous picture and the current picture that continues respectively.
Liquid crystal drive system comprises: a storer, a pulse signal module, a sound attitude judging unit and one first traffic pilot.Storer is deposited the first predetermined grey scale signal.The pulse signal module receives the second predetermined grey scale signal and the first predetermined grey scale signal of depositing, and produces a plurality of pulse signals to table look-up, and in regular turn a plurality of pulse signals is sent to first traffic pilot.
Sound attitude judging unit receives this second predetermined grey scale signal and the first predetermined grey scale signal of depositing, and serves as static or dynamically to judge current picture, and produces one first according to judged result and control signal to first traffic pilot.First traffic pilot receives second and is scheduled to grey scale signal, and according to first control signal, with this second predetermined grey scale signal of decision output, or exports these a plurality of pulse signals in regular turn.
About the advantages and spirit of the present invention, and more detailed embodiment can utilize following embodiment and appended graphic being further understood.
Description of drawings
Utilize following detailed description in conjunction with the accompanying drawings; Can understand the plurality of advantages of foregoing and this invention easily, wherein:
Fig. 1 is the LCD parent map;
Fig. 2 A shows typical continuous-mode liquid crystal drive voltage;
Fig. 2 B shows the driving voltage of pulse mode;
Fig. 3 (A to B) shows the liquid crystal board situation of picture and current picture formerly respectively;
Fig. 4 (A to C) shows that respectively the corresponding brightness of picture signal, drive signal and the pixel in one embodiment of the invention changes situation;
Fig. 5 is a liquid crystal drive system synoptic diagram of the present invention;
Fig. 6 (A to C) shows that respectively the corresponding brightness of picture signal, drive signal and the pixel in another embodiment of the present invention changes situation; And
Fig. 7 (A to C) shows that respectively the corresponding brightness of picture signal, drive signal and the pixel in another embodiment of the present invention changes situation.
The primary clustering symbol description
Second predetermined grey scale signal 212 drive signals 23
First pulse signal, 231 second pulse signals 232
The 3rd pulse signal 233 the 4th pulse signal 234
Previous picture 31 current pictures 32
Liquid crystal drive system 50 storeies 51
Pulse data signal table 52 delayer 53
Second controller, 54 sound attitude judging units 55
First controller, 56 pulse signal modules 59
Second control signal, 63 first control signals 65
Embodiment
The present invention is directed to known LCD and can't take into account two kinds of different situations of " dynamically " and " static state " between picture and picture, and intend providing a perfect solution.
Please refer to Fig. 3 A and Fig. 3 B.Liquid crystal panel 12 can show a plurality of pictures, and for example, liquid crystal panel 12 shows after the previous picture 31, shows a current picture 32, is connected in previous picture 31.It should be noted that previous picture in the literary composition and current picture can be represented any two pictures of adjacency, are not singly to refer in specific picture because means of the present invention are relevant with two pictures of adjacency.
The content of a plurality of pictures that liquid crystal panel 12 is shown depends on a picture signal 21.Picture signal 21 may be from display card or other signal source of VCD player (DVD or VCD), computing machine.Picture signal 21 includes the predetermined grey scale signal (for example label 211 and 212) of above-mentioned a plurality of picture a plurality of pixels wherein.
Shown in Fig. 3 A and Fig. 3 B, one first predetermined grey scale signal 211 decision pixels 121 are formerly during picture 31, the gray-scale displayed of answering.One second predetermined grey scale signal 212 decision pixels 121 when current picture 32, the gray-scale displayed of answering.
The driving method of giving liquid crystal panel 12 provided by the present invention mainly comprises the following steps:
A) relatively whether the second predetermined grey scale signal 212 is equal to the first predetermined grey scale signal 211.
B-1) if the two identical (i.e. the situation of " static state "), then when current picture 32, (hold type) drives pixel 121 with a continuous-mode;
B-2) if the two difference (i.e. the situation of " dynamically "), then when current picture 32, (impulse type) drives pixel 121 with a pulse mode.
Above-mentioned " pulse mode " is in the image time (frame time) at current picture 32, to utilize a plurality of pulse signals so that pixel 121 liquid crystal molecule wherein rotates constantly, so that the brightness of pixel 121 mainly is distributed in the initial stage of this image time.Above-mentioned " continuous-mode " is in an image time of current picture 32, makes liquid crystal molecule keep a predetermined anglec of rotation, so that the brightness of pixel 121 distributes in this image time fifty-fifty.
Please refer to Fig. 4 A and Fig. 4 B with further understanding the present invention.Fig. 4 A shows above-mentioned picture signal 21, wherein, and the different gray scale of the different signal value representative of height (for example, above-mentioned the first predetermined grey scale signal 211 be scheduled to grey scale signal 212) with second.Fig. 4 B shows a drive signal 23, and its signal value is also represented different gray scales.Drive signal 23 is in order to drive liquid crystal panel 12 pixel 121 wherein.In driving method provided by the present invention, be according to picture signal 21 to produce drive signal 23, therefore need at first detect for picture signal 21.Utilize the present invention, liquid crystal panel 12 can have the advantage of taking into account " dynamically " and " static state " two kinds of situations.
Main spirit of the present invention is: under the situation of " static state ", use " continuous-mode " to drive, and in the next use of the situation of " dynamically " " pulse mode ".
The situation of " static state " for example the screen D shown in Fig. 4 A to picture E, by picture signal 21, when current picture (Fig. 3 A label 32) when being picture E, because its grey scale signal (i.e. second grey scale signal 212) is identical with the grey scale signal (i.e. first grey scale signal 211) of previous picture (Fig. 3 B label 212, Fig. 4 A screen D).Therefore, when picture E, drive with continuous-mode (hold type).
Shown in Fig. 4 B, in the image time of picture E, 23 suppliers of drive signal are a single signal value, and have continued an image time, are the type of drive of " continuous-mode " shown in Fig. 2 A.What deserves to be mentioned is, though finally offer the magnitude of voltage that should be of liquid crystal molecule, the drive signal 23 of indication is not limited to the form of voltage among the present invention, also can be the current signal in the process.
The situation of " dynamically " for example the picture A shown in Fig. 4 A to picture B, by picture signal 21, when current picture (Fig. 3 A label 32) when being picture B, because grey scale signal (the i.e. first grey scale signal 211) difference of its grey scale signal (i.e. second grey scale signal 212) and previous picture (Fig. 3 B label 212, Fig. 4 A picture A).Therefore, picture B is one " dynamically " picture, drives with pulse mode (impulse type) in the present invention, utilizes a plurality of pulse signals (as Fig. 4 B label 231 and 232), so that pixel 121 presents the effect that pulse mode drives.
Shown in Fig. 4 B, in the image time of picture B, 23 suppliers of drive signal divide into two stages (time interval T1 and T2), have two kinds of different signal values, and it is respectively first pulse signal 231 and second pulse signal 232.Utilize above-mentioned type of drive, then the reaction of liquid crystal molecule is shown in Fig. 4 C, and Fig. 4 C is corresponding to the pixel of Fig. 4 B (Fig. 3 B label 121) brightness change curve.The anglec of rotation of liquid crystal molecule is depended in the brightness of pixel 121, yet the reaction time of liquid crystal molecule has its physical restriction, can change in real time unlike electric signal, therefore in time interval T1 and T2, liquid crystal molecule has little time to react in real time the anglec of rotation that conforms to drive signal 23 to rotate to, but, little by little rotate to the anglec of rotation that conforms to first pulse signal 231 or second pulse signal 232 to present the form of curve.Therefore, when driving with pulse mode, the brightness of pixel 121 presents the variation situation of Fig. 4 C under microcosmic, please refer to picture B or picture F among Fig. 4 C.
The present invention utilizes " pulse mode " under the situation of " dynamically ", utilizes a plurality of pulse signals (as label 231 and 232), and makes brightness concentrate on the initial stage of image time.Thus, the display effect of reality of the present invention then, be in close proximity to " pulse mode " type of drive (as Fig. 2 B) of known conventional television or cathode ray tube (CRT) display, can improve the smear shortcoming of known LCD when " dynamically " picture effectively.
The picture B that please refer to Fig. 4 A to Fig. 4 C is to picture C.As the requirement of the picture signal 21 of Fig. 4 A, picture B and picture C show same gray scale.Shown in Fig. 4 B, after drive signal 23 executes the driving of " pulse mode " at picture C, then drive picture C with " continuous-mode ".Yet what deserves to be mentioned is, shown in Fig. 4 C, because the physical characteristics of liquid crystal molecule at the initial stage of picture C, needs one period reaction time could arrive desired brightness.
Though picture B and picture C one drive with " pulse mode ", another person drives with " continuous-mode ", yet the two all shows identical gray scale (as the requirement of the picture signal 21 of Fig. 4 A), therefore, in Fig. 4 C, the brightness integration of time interval T1 to T2 is equal to the brightness integration of time interval T3 to T4.In other words, for human eye, watching picture B and picture C can be same gray scale.In this case, in the present invention, when being under the situation of same " numerical value " in the aforementioned second predetermined gray scale (it is about current picture), no matter a pixel is to drive with pulse mode or continuous-mode, then the brightness of this pixel is in the image time of current picture, and the brightness integrated value is identical.
Smear shortcoming when utilizing the accessible advantage of the present invention to be to avoid " dynamically " picture, and when the screen D of follow-up " static state " and picture E drives with " continuous-mode " again, then can avoid the flicker problem of " static state " picture.
When carrying out the driving of " pulse mode ", according to the grey scale change situation of previous picture 31, to produce suitable a plurality of pulse signals to current picture 32.For example first pulse signal 231 of Fig. 4 B and second pulse signal 232.The decision of the signal value of pulse signal is operated with various signal value actual pixels 121, and the brightness integration (as Fig. 4 C) of pixel 121 is detected, to ask for optimal signal value.And, implement to go up and can set up a pulse data signal table so that the grey scale change situation of adjacent two pictures of foundation, and inquire the signal value of a plurality of pulse signals that should provide.
About the realization of the invention described above LCD drive method, please refer to Fig. 5 and cooperate Fig. 3 A and Fig. 3 B, Fig. 5 is a liquid crystal drive system synoptic diagram of the present invention.
Liquid crystal drive system 50 receives picture signal 21.As described in Fig. 3 A and B and related description, picture signal 21 comprises the first predetermined grey scale signal 211 and the second predetermined grey scale signal 212 that continues, the gray-scale displayed of answering when determining a pixel 121 respectively formerly picture 31 is with the current picture 32 that continues.
Liquid crystal drive system 50 comprises a storer 51, a pulse signal module 59, a sound attitude judging unit 55 and one first multipath conversion (multiplexer) device 56.Pulse signal module 59 comprises a pulse data signal table 52, a delayer 53 and one second traffic pilot 54.
Storer 51 can be deposited the first predetermined grey scale signal 211 of previous picture 31.Pulse signal module 59, receive the second predetermined grey scale signal 212 and the first predetermined grey scale signal of depositing 211, produce a plurality of pulse signals (Fig. 5 label 231 and 232) to table look-up, and in regular turn a plurality of pulse signals (231 and 232) are sent to first traffic pilot 56 via second traffic pilot 54.
Wherein, pulse data signal table 52 receives the second predetermined grey scale signal 212 of current picture 32, and reception is deposited at the predetermined grey scale signal 211 of first in the storer 51.According to the two, produce one first pulse signal, 231 to second traffic pilots 54 to table look-up, and produce one second pulse signal 232 to delayer 53.
Delayer 53 can be deposited second pulse signal 232, and its delay is sent to second traffic pilot 54.Delayer 53 also produces one second control signal, 63 to second traffic pilots 54.Second traffic pilot 54 is according to second control signal 63, to transmit first pulse signal 231 and second pulse signal, 232 to first traffic pilots 56 in regular turn.
Sound attitude judging unit 55 receives the second predetermined grey scale signal 212, and reception is deposited at the first predetermined grey scale signal 211 of storer 51, relatively whether the two signal value is identical, judging that current picture (Fig. 3 B label 32) serves as static or dynamically, and produce one first control signal, 65 to first traffic pilots 56 according to judged result.In one embodiment, if judge that the two is identical, then the signal value of first control signal 65 is 0; If judge the two difference, then the signal value of first control signal 65 is 1.
First traffic pilot 56 receives the second predetermined grey scale signal 212, and receives first pulse signal 231 and second pulse signal 232 that continues from second traffic pilot 54.And first traffic pilot 56 with the decision output second predetermined grey scale signal 212, perhaps, is exported first pulse signal 231 and second pulse signal 232 according to first control signal 65 in regular turn.In one embodiment, when the signal value of first control signal 65 is 0 (static state), then grey scale signal 212 is scheduled in 56 outputs second of first traffic pilot, to carry out the driving of " continuous-mode "; When the signal value of first control signal 65 is 1 (dynamically), then first traffic pilot 56 is exported first pulse signal 231 and second pulse signal 232 in regular turn, to carry out the driving of " pulse mode ".
The liquid crystal drive system 50 that utilizes the invention described above to provide, LCD drive method then of the present invention can be realized.Wherein, display card or the picture signal of other signal source 21 from VCD player (DVD or VCD), computing machine, can in liquid crystal drive system 50, detect, be " static state " or " dynamically " according to adjacent two pictures wherein to judge current picture 32, and, can be from the dynamic response judged result, and produce " continuous-mode " or " pulse mode " the signal value that should have, and be achieved a kind of drive signal 23 that includes above-mentioned two kinds of patterns.
Please refer to Fig. 6 A to Fig. 6 C, it shows that respectively the relevant picture signal 21 of another embodiment of the present invention, drive signal 23 and pixel 121 corresponding brightness change situation.In this embodiment, for the picture of " dynamically ", picture b for example, drive signal 23 has comprised four pulse signals (adhering to time interval T1, T2, T3 and T4 separately), its actual effect can be referring to Fig. 6 C.
And can find by Fig. 6 A, picture signal 21 picture b and daytime face c require identical gray scale, therefore, though picture b drives with " pulse mode ", and picture c drives with " continuous-mode ", in Fig. 6 c, picture b is identical with the brightness integration of picture c.
And about the realization of the embodiment of Fig. 6 A to Fig. 6 C, need change for liquid crystal drive system shown in Figure 5 50, wherein, the content of pulse data signal table 52 is different with previous embodiment, the pulse signal of tabling look-up and being found via pulse data signal table 52, by two pulse signals of previous embodiment, and be increased to four.
Pulse data signal table 52 receives the second predetermined grey scale signal 212, and after receiving the first predetermined grey scale signal 211.According to the two, produce one first pulse signal 231, one second pulse signal 232, one the 3rd pulse signal 233 and one the 4th pulse signal 234 to table look-up, adhere to time interval T1, T2, T3 and T4 separately, afterwards, export these four pulse signals to first traffic pilot 56 in regular turn by second traffic pilot 54 with delayer 53.
Another driving method embodiment provided by the present invention can cooperate Fig. 3 A and Fig. 3 B, and it comprises the following steps:
A) relatively whether the second predetermined grey scale signal 212 is equal to the first predetermined grey scale signal 211.
B-1) if the two difference then drives pixel 121 at current picture 32 with a pulse mode (impulse type), and determine to be connected at least one picture of current picture 32 jointly, also drive pixel 121 with pulse mode.
B-2) if the two is identical, and current picture 32 is not when being determined to drive pixel 121 with pulse mode jointly, then drives this pixel with a continuous-mode (hold type) when current picture 32.
Below utilize Fig. 7 A to Fig. 7 C so that present embodiment to be described in detail in detail, it shows that respectively the relevant picture signal 21 of another embodiment of the present invention, drive signal 23 and pixel 121 corresponding brightness change situation.Among this embodiment, be similar to the embodiment of Fig. 4 A to Fig. 4 C, when one " dynamically " picture (for example picture B or picture F), its employed " pulse mode " has two pulse signals (as label 231 and 232).
Different with Fig. 4 A to Fig. 4 C embodiment is: in Fig. 7 A to Fig. 7 C embodiment, in case " dynamically " picture takes place, then determine to be connected at least one picture (" one " picture) of current picture 32 jointly, also drive with " pulse mode " for continuing among this embodiment.With reference to Fig. 7 A, picture B has different gray scales with picture A, therefore as Fig. 7 B, drives picture B with " pulse mode "; Get back to Fig. 7 A,, should belong to " static state " though ensuing picture C and picture B are same grayscale, yet because the above-mentioned rule of present embodiment, so still drive with " pulse mode " for picture C.
Present embodiment is considered the physical characteristics of liquid crystal molecule, for example, please refer to Fig. 4 B and C, the embodiment of Fig. 4 B drives the picture C that belongs to " static state " with " continuous-mode ", yet owing to slower reason of liquid crystal molecule reaction time itself, therefore shown in Fig. 4 C, at the initial stage of picture C, pixel 121 can not arrive required brightness immediately, thus, in the image time of picture C, the brightness integration that really presents then may with anticipator's drop to some extent.
Therefore, present embodiment is when " dynamically ", in a single day picture took place, all adopt " pulse mode " to be driven for continuous two pictures, thus, can improve the inaccurate situation of brightness that a picture (for example picture C of Fig. 4 B) that drives with " continuous-mode " that the picture (for example picture B) that drives with " pulse mode " is right after is thereafter presented.
Employed rule among the embodiment about Fig. 7 A to Fig. 7 C is (in case " dynamically " picture takes place, then determine to be connected at least one picture of current picture 32 jointly, also drive with " pulse mode "), utilize sound attitude judging unit 55 to realize actually.Sound attitude judging unit 55 is all exported first control signal 65 that belongs to " pulse mode " in two pictures continuously judging first grey scale signal 211 and second grey scale signal 212 not simultaneously.With Fig. 5 embodiment, all making the signal value of first control signal 65 in two pictures continuously is 1.Can realize the driving method of Fig. 7 A to Fig. 7 C embodiment thus.
Comprehensive the above, the invention provides a kind of driving method and liquid crystal drive system of liquid crystal panel.Utilize the present invention, can improve liquid crystal panel in " dynamically " and " static state " problem that picture had respectively.The present invention can compare two adjacent in picture signal pictures, belongs to " dynamically " or " static state " to detect current picture.And carry out pulse mode when " dynamically " and drive, drive and when " static state ", carry out continuous-mode.Smear and flicker problem for known liquid crystal panel the invention provides perfect solution.
Though the present invention with preferred embodiment openly as above, so it is not only to terminate in the foregoing description in order to limit the present invention and invention entity.Any those skilled in the art are when being easy to understand and utilize other assembly or mode to produce identical effect.Be with, the modification of being done in not breaking away from spirit of the present invention and scope all should be included in the claim scope that is proposed.
Claims (17)
1. the driving method of a liquid crystal panel, this liquid crystal panel comprises a plurality of pixels of arrayed, each pixel can show a plurality of gray scales, gray-scale displayed is answered in one first a predetermined grey scale signal decision wherein pixel when a previous picture, one current picture is connected in this previous picture, one second predetermined grey scale signal determines this pixel to answer gray-scale displayed in this during picture now, and this driving method comprises:
Relatively whether this second predetermined grey scale signal is equal to this first predetermined grey scale signal; And
If identical, then drive this pixel with a continuous-mode during picture in this now,
If different, then drive this pixel with a pulse mode during picture in this now.
2. driving method as claimed in claim 1, wherein, this pulse mode utilizes a plurality of pulse signals so that this pixel liquid crystal molecule wherein rotates constantly now in an image time of this of picture.
3. driving method as claimed in claim 2, wherein, when this pixel drove with this pulse mode, the brightness of this pixel mainly was distributed in the initial stage of this image time.
4. driving method as claimed in claim 1, wherein, this continuous-mode utilizes a drive signal so that this liquid crystal molecule is kept a predetermined anglec of rotation in this image time now in an image time of this of picture.
5. driving method as claimed in claim 1, wherein, when this pixel drove with this continuous-mode, the brightness of this pixel distributed in this image time fifty-fifty.
6. as the driving method of claim 2 or 4, wherein, be under the situation of same " numerical value " in this second predetermined gray scale, no matter this pixel drives with this pulse mode or this continuous-mode, and the integrated value of the brightness of this pixel in this image time is identical.
7. the driving method of a liquid crystal panel, this liquid crystal panel comprises a plurality of pixels of arrayed, each pixel can show a plurality of gray scales, gray-scale displayed is answered in one first a predetermined grey scale signal decision wherein pixel when a previous picture, one current picture (or frame) is connected in this previous picture, one second predetermined grey scale signal determines this pixel to answer gray-scale displayed in this during picture now, and this driving method comprises:
Relatively whether this second predetermined grey scale signal is equal to this first predetermined grey scale signal;
If different, then this now picture drive this pixel with a pulse mode, and when decision is connected at least one picture of this of picture now jointly, also drive this pixel with this pulse mode,
If identical, and should now picture when not determined to drive this pixel jointly with pulse mode, then drive this pixel with a continuous-mode during picture in this now.
8. driving method as claimed in claim 7, wherein, this pulse mode utilizes a plurality of pulse signals so that this pixel liquid crystal molecule wherein rotates constantly now in an image time of this of picture.
9. driving method as claimed in claim 8, wherein, when this pixel drove with this pulse mode, the brightness of this pixel mainly was distributed in the initial stage of this image time.
10. driving method as claimed in claim 7, wherein, this continuous-mode utilizes a drive signal so that this liquid crystal molecule is kept a predetermined anglec of rotation in this image time now in an image time of this of picture.
11. driving method as claimed in claim 10, wherein, when this pixel drove with this continuous-mode, the brightness of this pixel distributed in this image time fifty-fifty.
12. as claim 8 or the 10th described driving method, wherein, in this second predetermined gray scale is under the situation of same " numerical value ", and no matter this pixel drives with this pulse mode or this continuous-mode, and the integrated value of the brightness of this pixel in this image time is identical.
13. liquid crystal drive system, receive a picture signal, comprise one first predetermined grey scale signal and the one second predetermined grey scale signal that continues, determine pixel gray-scale displayed of answering when a previous picture and the current picture that continues respectively, this liquid crystal drive system comprises:
One storer is deposited this first predetermined grey scale signal;
One pulse signal module receives this second predetermined grey scale signal and this first predetermined grey scale signal, produces a plurality of pulse signals to table look-up, and should be sent to one first traffic pilot by a plurality of pulse signals in regular turn;
One sound attitude judging unit receives this second predetermined grey scale signal and this first predetermined grey scale signal, judging that this, picture served as static or dynamic now, and produces one first according to judged result and controls signal to this first traffic pilot; And
This first traffic pilot receives this second predetermined grey scale signal, and according to this first control signal, with this second predetermined grey scale signal of decision output, or exports these a plurality of pulse signals in regular turn.
14. liquid crystal drive system as claimed in claim 13, wherein this pulse signal module comprises a pulse data signal table, receives this second predetermined grey scale signal and this first predetermined grey scale signal, and produces one first pulse signal and one second pulse signal according to this.
15. liquid crystal drive system as claimed in claim 14, wherein this pulse signal module comprises one second traffic pilot, and this first pulse signal is sent to this second traffic pilot.
16. liquid crystal drive system as claimed in claim 15, wherein this pulse signal module comprises a delayer, this second pulse signal is sent to this delayer, and postpones to be sent to this second traffic pilot, this delayer and produce one second and control signal to this second traffic pilot.
17. liquid crystal drive system as claimed in claim 16, wherein this second traffic pilot is according to this second control signal, to transmit this first pulse signal and this second pulse signal to, first traffic pilot in regular turn.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045583A (en) * | 2009-10-21 | 2011-05-04 | 索尼公司 | Display device, display method and computer program |
| CN103293731A (en) * | 2013-04-27 | 2013-09-11 | 深圳市金立通信设备有限公司 | Method and device for adjusting overturning manner of liquid crystal molecules of display |
| CN105225634A (en) * | 2015-10-12 | 2016-01-06 | 深圳市华星光电技术有限公司 | The drive system of displayer and driving method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3527193B2 (en) * | 2000-10-13 | 2004-05-17 | Ｎｅｃエレクトロニクス株式会社 | Liquid crystal display device and computer |
| EP1227460A3 (en) * | 2001-01-22 | 2008-03-26 | Toshiba Matsushita Display Technology Co., Ltd. | Display device and method for driving the same |
| CN100545899C (en) * | 2003-02-03 | 2009-09-30 | 夏普株式会社 | Liquid crystal indicator |
| CN100390856C (en) * | 2005-01-14 | 2008-05-28 | 友达光电股份有限公司 | LCD capable of improving dynamic frame display quality and driving method thereof |
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2005
- 2005-08-04 CN CNB2005100910474A patent/CN100359557C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045583A (en) * | 2009-10-21 | 2011-05-04 | 索尼公司 | Display device, display method and computer program |
| CN103293731A (en) * | 2013-04-27 | 2013-09-11 | 深圳市金立通信设备有限公司 | Method and device for adjusting overturning manner of liquid crystal molecules of display |
| CN103293731B (en) * | 2013-04-27 | 2017-06-23 | 深圳市金立通信设备有限公司 | It is a kind of to adjust the method and apparatus that display liquid crystal molecule overturns mode |
| CN105225634A (en) * | 2015-10-12 | 2016-01-06 | 深圳市华星光电技术有限公司 | The drive system of displayer and driving method |
| CN105225634B (en) * | 2015-10-12 | 2017-11-03 | 深圳市华星光电技术有限公司 | The drive system and driving method of displayer |
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| Publication number | Publication date |
|---|---|
| CN100359557C (en) | 2008-01-02 |
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