CN101286313B - Display multi-picture frame polarity reversal overexcitation drive method - Google Patents
Display multi-picture frame polarity reversal overexcitation drive method Download PDFInfo
- Publication number
- CN101286313B CN101286313B CN2007100937531A CN200710093753A CN101286313B CN 101286313 B CN101286313 B CN 101286313B CN 2007100937531 A CN2007100937531 A CN 2007100937531A CN 200710093753 A CN200710093753 A CN 200710093753A CN 101286313 B CN101286313 B CN 101286313B
- Authority
- CN
- China
- Prior art keywords
- voltage
- picture frame
- during
- display
- gray code
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention relates to a multi-frame polarity reversing extreme driving method used for a display. During the frame period of the display panel, frame-rate input is raised to cause the frame period to be divided into at least a first voltage control period and a second voltage control period, and the presentation of brightness is controlled by a first grayscale-code which corresponds to a firstvoltage value during the first voltage control period. The second voltage control period is just behind the first voltage control period and the presentation of the brightness is controlled by a second grayscale-code which corresponds to a second voltage value used for driving the display panel. The first voltage value and the second voltage value have the same polarity so as to lead the driving voltage to quickly reach the voltage required for presenting the panel brightness so as to reduce the grayscale loss of the panel and avoid poor brightness.
Description
Technical field
The present invention relates to a kind of multi-picture frame polarity reversal overexcitation drive method of display, relate in particular to a kind of multi-picture frame polarity reversal overexcitation drive method that picture frame speed input is promoted and make the display of the voltage same polarity during each Control of Voltage in the same picture frame.
Background technology
Because the progress and the renewal of science and technology, make display constantly advance towards little, the lightweight target of volume, especially LCD has advantages such as low power consumption, weight is frivolous, radiationless and do not glimmer, can be applicable to Digital Television, mobile computer or computer screen, thereby become the main flow of display industry gradually.Yet be subject to the characteristic of liquid crystal molecule, as coefficient of viscosity, elasticity coefficient and dielectric coefficient or the like, so display exists its restriction and shortcoming.
Usually when the picture display speed surpasses 25 picture frames of per second (frame), human eye can be considered as the picture of being seen continuous action, and at present the display speed of image is everlasting 60 of per seconds more than the picture frame, to satisfy the demand of action movie, recreation or high-quality DVD film.It is voltage to be bestowed liquid crystal cell (Cell) make the liquid crystal molecule rotation that the brightness of liquid crystal panel presents, the ratio that sees through of light with the control backlight module, because with driven liquid crystal molecule reaction needed response time (Response time), with improve driving voltage and need not change display panel structure with the technology that shortens the LCD response time one for " too drastic driving " (Overdrive, OD) technology.
With Fig. 8 is example, if display pannel is target sign indicating number (Targetcode) in the brightness that picture frame N and picture frame N+1 desire to present, its corresponding change in voltage is shown in the curve of label 61, by too drastic Driving technique, when picture frame N, import too drastic driving gray code method (OD code) and replace the target sign indicating number, then with the corresponding change in voltage of too drastic driving gray code method shown in label 62, reach panel brightness to be presented by this fast; After entering picture frame N+1, immediately with the pairing driven liquid crystal panel of target sign indicating number, to reach required brightness.Wherein, when the voltage of show electrode is higher than benchmark (Common) the voltage Vcom of liquid crystal panel, just be referred to as positive polarity, otherwise be called negative polarity, if adopt the reference voltage AC driving, with this situation that produces the positive-negative polarity alternating voltage, be referred to as reversal of poles (polarity inversion).
The conventional polar inverting method has four kinds, be respectively the face counter-rotating (frame inversion) shown in Fig. 9 A, when picture frame N converts picture frame N+1 to, electric polarity will become negative polarity from positive polarity as shown in the figure in whole the zone, and the change of its polarity is to be unit with the face; Row counter-rotating (column inversion) shown in Fig. 9 B then change of its polarity is with behavior unit; Row counter-rotatings (Row inversion) shown in Fig. 9 C, the change of its polarity is with the unit of classifying as; And the counter-rotating of the point shown in Fig. 9 D (Dot inversion), the change of its polarity is to be unit with the point.
The dealer of field of liquid crystal is in order to satisfy the more demand of high-order fast image processing, then release the display pannel of high picture frame speed (High frame rate), that is the framework of change liquid crystal panel is accelerated the picture frame renewal speed, even double, the picture frame speed lifting that for example originally is 60Hz is 70Hz, 80Hz, or even the picture frame speed of 120Hz, its voltage and gray code method (code) change figure as shown in figure 10, wherein, originally the change in voltage of picture frame speed 60Hz should fall within label 81, in 81 ' the dotted line scope, after carrying out driven with the 120Hz that doubles, capacitor charge and discharge and the time of keeping will reduce half, that is 82 be divided into during the picture frame N ' during the N and picture frame during first picture frame originally, during picture frame during N, driven by too drastic driving gray code method (OD code) makes the change in voltage curve shown in label 83, voltage is positive polarity, when entering during the picture frame N ', change by the target sign indicating number and drive liquid crystal molecule, polarity of voltage is reversed to negative polarity simultaneously, and the change in voltage curve is shown in label 84.
Yet, owing to improving, picture frame speed shortens the response time, cause panel duration of charging deficiency also, suppose under the picture frame speed 60Hz, 82 with too drastic driving gray code method driving panel during first picture frame, its change in voltage curve is shown in label 85, though and the climbing speed of the change in voltage curve of label 83 is fast than the change in voltage curve of label 85, but the undertension that discharges and recharges, can't arrive and satisfy the required voltage of brightness, also there is this problem in N ' during the picture frame, change in voltage curve 84 can't arrive the change in voltage curve 81 ' of target sign indicating number correspondence, cause GTG loss (gray level loss), it is poor that the polarity that can't reach the problem that presents brightness and brightness disproportionation, especially each adjacent frames of expection mutually exists higher voltage on the contrary, causes the voltage of each picture frame all can't reach the voltage of expection.
Moreover, when carrying out high picture frame speed, the feed-in that the capacitor charge and discharge effect produces penetrates (feed-through) effect, to make the change in voltage curve produce the curvilinear motion that the voltage as the spike shape of label 831 and label 832 falls downwards, simultaneously also cause reference voltage V com value low than data center's value, and AC drive voltage is offset under the situation of (off-set) for a long time, will the glimmer phenomenon of (Flicking) or ghost (Image sticking) of picture, and the serious words of the situation of voltage charging deficiency, from whole front panel, panel has the picture meeting deepening of half, or differs along the brightness light and shade of gate line both sides.
In addition, to maintain magnitude of voltage by capacitor after the LCD charging, to keep panel luminance up to the renewal of picture next time, this kind video picture mode is referred to as the formula of retaining (Hold type), but if the liquid crystal molecule reaction velocity is fast inadequately, just can produce the image overlapping of image with back one picture of last picture on the display, and cause image fog, it is ghost phenomena, for head it off, can capture the advantage of pulsed (Impulse type) developing method of CRT monitor, use the technology of analog pulse (Pseudo impulse type) to present image data on LCD, main mode is to insert black data or black picture in the continuous image picture, or in backlight, insert black picture signal, make the backlight flicker, reach the effect of simulation CRT video picture, in order to eliminate ghost phenomena.
Yet, see also shown in Figure 11, when high picture frame speed technology is applied to the video picture mode of emulation pulsed, suppose that its gray code method and change in voltage curve are respectively shown in label 91 and 92, wherein gray code method code 0 will produce complete black, the black picture of no brightness, but because of the duration of charging not enough, voltage under the high picture frame speed state is obviously not enough, its change in voltage curve 91 can't arrive the change in voltage curve under the general picture frame speed shown in the label 93, also just cause the problem of loss of GTG value and brightness disproportionation, make display produce the phenomenon of flicker (Flicking) or ghost (Image sticking).
Moreover, the display pannel lifting that traditional 60Hz is shown speed needs hardware configuration equipment is changed for the demonstration speed more than the 60Hz, double gate drive or data driver for example are set, be Challenging the Limits not only to data line (data-line) or opening resistor (turn-on resister), and manufacturing or spent material, manpower, the cost of time of design process improve all relatively, even up to more than one times.
Summary of the invention
Fundamental purpose of the present invention provides a kind of multi-picture frame polarity reversal overexcitation drive method of display, and it keeps the existing display architectures of use, need not carry out computer hardware change or lifting, can improve the brightness performance, reduce the loss of GTG value, reduce production costs by this, promote competitive power.
Another object of the present invention provides a kind of multi-picture frame polarity reversal overexcitation drive method of display, its picture frame speed input (frame-rate input) during with picture frame improves and divides into during at least two Control of Voltage, and make voltage same polarity during each Control of Voltage during the same picture frame, shorten voltage difference, reach presenting of brightness fast.
Another purpose of the present invention provides a kind of multi-picture frame polarity reversal overexcitation drive method of display, and it can be applicable to the display of analog pulse formula, reduces the problem of GTG loss and luminance shortage.
In order to achieve the above object, the multi-picture frame polarity reversal overexcitation drive method of display of the present invention comprises: during the process that makes this display pannel receive a picture frame is a picture frame, the input of picture frame speed during this picture frame is improved, be divided into during at least two Control of Voltage during making this picture frame, that is comprise during first Control of Voltage and during second Control of Voltage, during first Control of Voltage, be by the presenting of one first gray code method (code) control brightness, and one in order to first magnitude of voltage of driving display panel corresponding to this first gray code method; Then, after being next to during first Control of Voltage during this second Control of Voltage, during second Control of Voltage, it is presenting by the control brightness of one second gray code method, and one in order to second magnitude of voltage of driving display panel corresponding to this second gray code method, this second magnitude of voltage and the first magnitude of voltage same polarity, wherein, this first gray code method will make the too drastic driving of display pannel, this second magnitude of voltage is for surpassing the required voltage of too drastic driving gray code method of this picture frame, make the present invention need not change the conventional hardware framework by this, and do not cause the burden (duty-free) of power.
Description of drawings
Fig. 1 is the synoptic diagram of the first embodiment of the present invention;
Fig. 2 is the synoptic diagram of the second embodiment of the present invention;
Fig. 3 is the synoptic diagram of the third embodiment of the present invention;
Fig. 4 is the synoptic diagram of the fourth embodiment of the present invention;
Fig. 5 is the synoptic diagram of the fifth embodiment of the present invention;
Fig. 6 is the synoptic diagram that the present invention carries out the charging voltage compensation;
Fig. 7 is that the present invention carries out the synoptic diagram that the rectangle compensating basin is distinguished in panel;
Fig. 8 is the synoptic diagram of the too drastic driving of known display pannel;
Fig. 9 A is the synoptic diagram of the face counter-rotating of known polar inversion method;
Fig. 9 B is the synoptic diagram of the row counter-rotating of known polar inversion method;
Fig. 9 C is the synoptic diagram of the row counter-rotating of known polar inversion method;
Fig. 9 D is the synoptic diagram of the some counter-rotating of known polar inversion method;
Figure 10 is the voltage of known high picture frame speed display pannel and the synoptic diagram that gray code method changes;
Figure 11 is the synoptic diagram that high picture frame speed technology is applied to emulation pulsed imaging technique.
The drawing reference numeral explanation:
The present invention: during first picture frame 111; Change in voltage scope 112,112 '; Change in voltage curve 113,114; During second picture frame 115; Change in voltage scope 121,121 ' 131,131 '; During first picture frame 122,132,141; Too drastic driving gray code method curve 123; During second picture frame 127,135,142; Change in voltage curve 124,125,126,133,134,136,31,41,42; First gray code method 137,143; Second gray code method 138,144; The 3rd gray code method 145; The 4th gray code method 146; N during first Control of Voltage, N+1, N+2, N+3; N ' during second Control of Voltage, N+1 ', N+2 ', N+3 '; Tertiary voltage control period N+1; N+1 ' during the 4th Control of Voltage; During the picture frame 32,33,34,35; Panel 51; Compensating basin 52.
Located by prior art: picture frame N, N+1; Change in voltage curve 6162; Reference voltage V com; Change in voltage scope line 81,81 '; During first picture frame 82; Change in voltage curve 83,84,85,92,93; The spike 831 of change in voltage curve; The variation 832 of voltage curve; Gray code method change curve 91.
Embodiment
For the technology contents, the goal of the invention that make the present invention use and the effect reached thereof have more complete and clearly disclose, now under describe it in detail, and see also the graphic and figure number of being taken off:
At first it should be noted that, method used in the present invention is to carry out under the framework of traditional monitor panel, need not change hardware structure, wherein, suppose that display pannel is made up of a plurality of display unit, with LCD screen, each display unit also is called picture element (pixel), each display unit presents different brightness variations by the change of magnitude of voltage, and again, the size of magnitude of voltage is by gray code method (code) decision that drives display unit.
Then illustrate to illustrate, see also shown in Figure 1, it is first embodiment of multi-picture frame polarity reversal overexcitation drive method of the present invention, suppose that this display unit is to receive four picture frames, the brightness that each picture frame is desired to present represents with target sign indicating number (Target code), during the process that makes each be received picture frame by the display unit of this display pannel is a picture frame.
In the present embodiment, be 111 with label during first picture frame and improve the input of its picture frame speed (frame-rate), for example the input of picture frame speed is doubled, the picture frame speed of script 60Hz is promoted to 120Hz picture frame speed, 111 are split into N during two Control of Voltage during this moment first picture frame originally, N ', N during first Control of Voltage, make one to be higher than the too drastic driving gray code method (OD code) of target sign indicating number (Target code) as first gray code method, make display unit accept first magnitude of voltage of too drastic driving gray code method correspondence for too drastic driving, as can be seen from Figure, the pairing change in voltage scope of this target sign indicating number should be between the straight line between label 112 and the label 112 ', and the change in voltage that too drastic driving gray code method is presented under the picture frame speed of script 60Hz is the dotted line as label 113, in the input picture frame speed that doubles to the 120Hz effect, the actual change in voltage that produces will be shown in the curve of label 114, because the duration of charging deficiency, then the change in voltage of label 114 can't arrive the shown change in voltage curve of label 113.
After N during first Control of Voltage finishes, N ' during 111 second Control of Voltage during this first picture frame immediately, import this display unit with one with second magnitude of voltage of this first magnitude of voltage same polarity, in the present embodiment, because the voltage that too drastic driving gray code method has made display unit receive is higher than the pairing voltage of target sign indicating number, so enter during first picture frame during 111 second Control of Voltage behind the N ', with 111 target sign indicating number during first picture frame as second gray code method, and with the voltage of pairing second magnitude of voltage of second gray code method as this input, especially, this second magnitude of voltage by Polarity Control (polarity control) with first Control of Voltage during the first magnitude of voltage same polarity of N ', because of first magnitude of voltage of too drastic driving gray code method correspondence voltage near target sign indicating number correspondence, so the virtual voltage curvilinear motion (shown in label 114) of N ' can promptly arrive the voltage curve (label 112) of target sign indicating number correspondence during second Control of Voltage, and then reach the brightness that the expection of this display pannel presents, importantly, do not increase the burden of power.
When then entering during next picture frame (that is during second picture frame 115), display unit receives the voltage corresponding with the target sign indicating number, be subjected to picture frame speed and increase event, in during second picture frame 115 last during N+1 may produce the phenomenon of undertension, but also to enter the extrusion of picture frame N+1 little because of the picture frame N ' from positive polarity, so the change in voltage curve is also than the change in voltage curve 112 ' near target sign indicating number correspondence, in case enter during second picture frame 115 back one during N+1 ' afc voltage will be supplied, and then reach and present the required voltage of brightness, reduce the GTG loss and solve the problem of luminance shortage.
Then see also shown in Figure 2, it is second embodiment of multi-picture frame polarity reversal overexcitation drive method of the present invention, suppose that this display unit is to receive four picture frames, the brightness that each picture frame is desired to present represents that with the target sign indicating number it desires to reach the change in voltage scope with label 121, and 121 ' straight line is represented, and in during first picture frame 122 under general picture frame speed, 60Hz for example, the too drastic driving gray code method of input represents that with the dotted line of label 123 its corresponding voltage then is the dotted line of label 124.
In the present embodiment, picture frame speed (frame-rate) raising of 122 inputs during first picture frame is doubled, for example be promoted to 120Hz from 60Hz, originally 122 are split into during first Control of Voltage N ' during the N and second Control of Voltage during first picture frame, N during first Control of Voltage, its with too drastic driving gray code method as first gray code method, and the change in voltage that first magnitude of voltage of this first gray code method correspondence is presented is shown in label 125, the result identical with first embodiment, because of the duration of charging deficiency, so voltage can't arrive the shown change in voltage curve of label 124.
But after N during first Control of Voltage finishes, N ' imports this display unit with one with second magnitude of voltage of this first magnitude of voltage same polarity during second Control of Voltage subsequently, in the present embodiment, because first magnitude of voltage of too drastic driving gray code method correspondence has made display unit near change in voltage (curve of label 124) that 60Hz desired to reach, so with 122 the pairing voltage of too drastic driving gray code method during first picture frame as this second magnitude of voltage, especially this second magnitude of voltage by Polarity Control (polarity control) with first Control of Voltage during the first magnitude of voltage same polarity of N, at this moment, the virtual voltage curvilinear motion of N ' (shown in label 126) can promptly arrive the voltage curve (shown in label 124) of too drastic driving gray code method correspondence during second Control of Voltage, and then reach the brightness that this display pannel expection presents.
When then entering during next picture frame (that is during second picture frame of label 127), display unit receives the voltage corresponding with the target sign indicating number, desirable change in voltage curve should be 121 as label, shown in 121 ' the dotted line, be subjected to picture frame speed and increase event, in during second picture frame 127 last during N+1 may produce the phenomenon of undertension, but, in case enter during second picture frame 127 back one during behind the N+1 ', not enough voltage will be supplied, and then reach and present the required voltage of brightness, reduce the GTG loss and solve the problem of luminance shortage.
Then, see also shown in Figure 3, it is the 3rd embodiment of multi-picture frame polarity reversal overexcitation drive method of the present invention, suppose that a display unit is to receive four picture frames continuously, the brightness that each picture frame is desired to present is represented with the target sign indicating number, it desires to reach the change in voltage scope with label 131,131 ' straight line is represented, picture frame speed (frame-rate) raising of 132 inputs during first picture frame is doubled, for example be promoted to 120Hz from 60Hz, originally 132 are split into during first Control of Voltage N ' during the N and second Control of Voltage during first picture frame, N during first Control of Voltage, its target sign indicating number with this picture frame drives display unit as first gray code method 137, and it is corresponding with this first gray code method 137 and be shown in label 133 in order to the change in voltage that first magnitude of voltage of driving display panel is presented, because of the duration of charging deficiency, so voltage can't arrive the shown change in voltage curve of label 131.
But after N during first Control of Voltage finishes, N ' controls presenting of brightness with one second gray code method 138 during second Control of Voltage subsequently, this second gray code method 138 is a too drastic driving gray code method, to make the too drastic driving of display pannel (over-drive), one second magnitude of voltage and this second gray code method 138 are corresponding and for surpassing the needed voltage of target sign indicating number, that is, the change in voltage curve of this second magnitude of voltage correspondence (shown in label 134) will be higher than the change in voltage curve shown in the label 131, especially, second magnitude of voltage and first magnitude of voltage have identical polar, by this, 132 enter during second picture frame at 135 o'clock during first picture frame, and its change in voltage curve 136 can more be pressed close to the change in voltage curve 131 ' that display pannel desires to present brightness.
See also shown in Figure 4 again, it is the 4th embodiment of multi-picture frame polarity reversal overexcitation drive method of the present invention, present embodiment is the extension of the 3rd embodiment, suppose in during first picture frame 141 by quickening picture frame speed N ' during the N and second Control of Voltage during being divided into first Control of Voltage, N during first and second Control of Voltage, N ' is respectively by first gray code method 143 and the 144 control brightness of second gray code method, and first gray code method 143 is the target sign indicating number of this picture frame, and this second gray code method 144 is too drastic driving gray code method.
Because 141 possibility undercharges during first picture frame, so enter during second picture frame after 142, improve by the input of picture frame speed, make during second picture frame 142 to be divided into N+1 ' during tertiary voltage control period N+1 and the 4th Control of Voltage, N+1 during the 3rd and the 4th Control of Voltage, N+1 ' controls presenting of brightness by the 3rd gray code method 145 and the 4th gray code method 146 respectively, and corresponds respectively to the 3rd gray code method 145 and the 4th gray code method 146 in order to the tertiary voltage value and the 4th magnitude of voltage of driving display panel.
Be with last embodiment difference: it is the target sign indicating number of this picture frame that the 3rd gray code method 145 contrasts in first gray code method 143, the 4th gray code method 146 is the too drastic driving gray code method of adjusting according to second gray code method 144 of N ' during second Control of Voltage of feedback (feedback OD code), that is the 4th gray code method 146 can make the too drastic driving of display pannel equally, but owing to 141 carried out once too drastic driving during the last Control of Voltage, therefore, during the 4th Control of Voltage the 4th gray code method 146 of N+1 ' can be suitably less than second gray code method 144 and approach the target sign indicating number, especially, the the 3rd and the 4th gray code method 145, the 146 the pairing the 3rd and the 4th magnitude of voltage is a same polarity, but during first Control of Voltage 141 with second Control of Voltage during 142 magnitude of voltage polarity opposite, that is, first and second magnitude of voltage is opposite with the 3rd and the 4th magnitude of voltage polarity, by the technology of present embodiment, will the situation of undercharge be improved.
The present invention also can be applicable to the analog pulse technology, see also shown in Figure 5, it is the 5th embodiment of multi-picture frame polarity reversal overexcitation drive method of the present invention, N during first Control of Voltage, N+1, N+2, N+3, by one first gray code method (code) control brightness presenting and by one first magnitude of voltage corresponding to this first gray code method, N ' during second Control of Voltage, N+1 ', N+2 ', N+3 ' is next to N during first Control of Voltage, N+1, N+2, after the N+3, N ' during second Control of Voltage, N+1 ', N+2 ', N+3 ' bestows presenting of one second gray code method control brightness, similarly, second magnitude of voltage is corresponding to this second gray code method, this second magnitude of voltage and the first magnitude of voltage same polarity.
Be with the previous embodiment difference: after N during first Control of Voltage finishes, in N ' during second Control of Voltage subsequently with one with this first Control of Voltage during second magnitude of voltage of the first magnitude of voltage same polarity import this display unit, in the present embodiment, this second magnitude of voltage is the voltage that makes the display pannel blackening, though the gray code method code0 of display will produce complete black, the black picture of no brightness, and during practical application of the present invention, make the gray code method of LCD below a numerical value, promptly can be considered black picture, as code5～10, still represent black picture in the following description or make the voltage of picture deepening with code0, especially this second magnitude of voltage by Polarity Control (polarity control) with first Control of Voltage during the second magnitude of voltage same polarity of N, its voltage curve changes as shown in the reference numeral 31.
In present embodiment, it is during each picture frame 32,33, N during 34,35 first Control of Voltage, N+1, N+2, N+3 bestow default gray code method (Pre code) or target sign indicating number with as first gray code method, and N ' during second Control of Voltage and then, N+1 ', N+2 ', N+3 ' bestows code0, in addition, N during this first Control of Voltage, N+1, N+2, N+3 also as described above embodiment bestow an OD code with too drastic driving effect with as first gray code method.
Shorten during no matter high picture frame speed technology or method of the present invention all are to make picture frame, and then may be because of response time deficiency or the not enough problem that produces luminance shortage of duration of charging, one of raising brightness method is cel-gap (Cell-gap) increase with display pannel, structure for fear of the change liquid crystal cell, and in response to cel-gap that frame causes differs and the problem of brightness disproportionation because of adding in the panel manufacture process, the present invention proposes another kind of method: charging voltage compensation (charging voltage compensation) is so that the brightness uniformity of panel, the compensation of this charging voltage is that the difference that the brightness according to display pannel presents is adjusted, at first, the mode of charging voltage compensation is that display pannel is divided into a plurality of compensating basins, each compensating basin is provided with at least one compensation GTG value, and each compensates the GTG value is to be got by the brightness of actual measurement display pannel.
For example, because of adding the frame pressurized, the cel-gap behind the pressurized diminishes and then reduces brightness around the display pannel, and then the compensation GTG value of the compensating basin around the panel will be enhanced; On the contrary, display pannel central authorities then are subjected to panel and add frame all around and will present projection a little, so cel-gap becomes big and then improves brightness, then the compensation GTG value of the compensating basin of panel central authorities will suitably reduce, hence one can see that, and no matter the size of the compensation GTG value of each compensating basin from left to right or from top to bottom arranges presenting graded.
The compensation GTG value of above-mentioned each compensating basin can be stored in comparison list (look-up table) for access, in the time of during carrying out method of the present invention and entering second Control of Voltage, to from the table of comparisons, access compensate the GTG value according to the difference of each compensating basin, make the driving GTG value during second Control of Voltage increase, constant or reduce, with Fig. 6 is example, it enters during second Control of Voltage during first picture frame behind the N ', second gray code method of N ' during the compensation GTG value of the table of comparisons and second Control of Voltage is combined, then make second magnitude of voltage (change in voltage curve as shown in the reference numeral 41) that N ' presents during second Control of Voltage be higher than the pairing voltage of target sign indicating number (the change in voltage curve shown in the label 42), that is gray code method herein is in conjunction with bigger compensation GTG value, and the brightness of panel is improved.
The compensating basin of charging voltage compensation of the present invention can be rectangle or wire is arranged, if the compensating basin be rectangle region every, as shown in Figure 7, it is that panel 51 is divided into nine large compensation districts 52 generally, in addition, also with the need and further segmentation is a unit with 32 (pixel) X32 (pixel) or 64 (pixel) X64 (pixel) for example, and brightness presents more presses close to raw frames.
If the compensating basin of charging voltage compensation is made as wire and arranges, be meant that then carrying out brightness along gate line surveys and get, can more be compensated the GTG value, make that the luminance compensation of panel is more accurate.
The present invention illustrates as embodiment that with LCD in addition, the present invention also can be applicable to Organic Light Emitting Diode (OLED) display, plasma display panel (PDP) or other suitable display, does not exceed with this embodiment.
As from the foregoing, the present invention has following plurality of advantages:
1. the present invention need not to use or change the hardware structure of original display, and the voltage charging process maybe must be improved, and relatively, also reduces the problem of luminance shortage and GTG loss, particularly, and inactivity burden (duty-free).
2. the mode of bestowing voltage of the present invention's proposition can effectively reduce the excessive problem of conventional polar reversal voltage difference, effectively and fast reaches the brightness that panel is desired to present.
3. the invention provides the mode of display area luminance compensation, make display be improved because of the problem of brightness disproportionation in the manufacture process.
Aforesaid embodiment or diagram and non-limiting structure sample attitude of the present invention or size have suitable variation or the modification of knowing the knowledgeable usually in any affiliated technical field, all should be considered as not breaking away from patent category of the present invention.
Claims (16)
1. the multi-picture frame polarity reversal overexcitation drive method of a display is characterized in that, this method comprises:
During the process that makes this display pannel receive a picture frame is a picture frame, the input of the picture frame speed during this picture frame is improved, be divided into during at least two Control of Voltage during making this picture frame;
During first Control of Voltage, be by the presenting of one first gray code method control brightness, and one in order to first magnitude of voltage of driving display panel corresponding to this first gray code method; And
After being next to during first Control of Voltage during second Control of Voltage, during second Control of Voltage, it is presenting by the control brightness of one second gray code method, and one in order to second magnitude of voltage of driving display panel corresponding to this second gray code method, this second magnitude of voltage and the first magnitude of voltage same polarity, wherein
This first gray code method will make the too drastic driving of display pannel, and this second magnitude of voltage is for surpassing the required voltage of too drastic driving gray code method of this picture frame.
2. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 1 is characterized in that, this second magnitude of voltage is the required voltage of target sign indicating number that reaches this picture frame.
3. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 1 is characterized in that, this second magnitude of voltage is the required voltage of too drastic driving gray code method that reaches this picture frame.
4. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 1 is characterized in that, this second magnitude of voltage is the voltage that makes the display pannel blackening.
5. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 1 is characterized in that, its difference that further presents according to brightness in this display pannel is carried out the charging voltage compensation, so that brightness presents evenly.
6. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 5, it is characterized in that, the mode of charging voltage compensation is that display pannel is divided into a plurality of compensating basins, and each compensating basin is provided with at least one compensation gray code method, to increase or to reduce brightness.
7. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 6 is characterized in that, the compensation gray code method of each compensating basin is to arrange with graded.
8. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 6 is characterized in that, the compensation gray code method of each compensating basin is to be stored at least one table of comparisons for access.
9. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 6 is characterized in that, this compensating basin is rectangular.
10. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 6 is characterized in that, this compensating basin is to be wire to arrange.
11. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 5 is characterized in that, the numerical value of this charging voltage compensation is to get according to the actual measurement display pannel.
12. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 1 is characterized in that, this display is LCD, organic light emitting diode display or plasma display panel.
13. the multi-picture frame polarity reversal overexcitation drive method of a display is characterized in that, this method comprises:
During the process that makes this display pannel receive a picture frame is a picture frame, the input of the picture frame speed during this picture frame is improved, be divided into during at least two Control of Voltage during making this picture frame;
During first Control of Voltage, it is presenting by the control brightness of one first gray code method, the target sign indicating number that this first gray code method is this picture frame, and one in order to first magnitude of voltage of driving display panel corresponding to this first gray code method, this first magnitude of voltage is the required voltage of target sign indicating number that reaches this picture frame; And
After being next to during first Control of Voltage during second Control of Voltage, during second Control of Voltage, it is presenting by the control brightness of one second gray code method, this second gray code method will make the too drastic driving of display pannel, and one in order to second magnitude of voltage of driving display panel corresponding to this second gray code method, this second magnitude of voltage is the required voltage of too drastic driving gray code method, this second magnitude of voltage and the first magnitude of voltage same polarity that reaches this picture frame.
14. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 13, it is characterized in that, finish during this picture frame and when entering during the next picture frame, equally the input of the picture frame speed during this picture frame is improved, make and be divided into during time picture frame during at least two Control of Voltage that comprise during the 3rd and the 4th Control of Voltage, control presenting of brightness by the 3rd gray code method and the 4th gray code method respectively during the 3rd and the 4th Control of Voltage, and tertiary voltage value and the 4th magnitude of voltage correspond respectively to the 3rd gray code method and the 4th gray code method, for the driving display panel, this tertiary voltage value and the 4th magnitude of voltage same polarity, but opposite with first magnitude of voltage and the second magnitude of voltage polarity.
15. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 14 is characterized in that, the 3rd gray code method is the target sign indicating number of this picture frame.
16. the multi-picture frame polarity reversal overexcitation drive method of display as claimed in claim 14, it is characterized in that, the 4th gray code method is according to the second gray code method adjustment during second Control of Voltage, so that the too drastic driving gray code method of the feedback of the too drastic driving of display pannel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100937531A CN101286313B (en) | 2007-04-11 | 2007-04-11 | Display multi-picture frame polarity reversal overexcitation drive method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100937531A CN101286313B (en) | 2007-04-11 | 2007-04-11 | Display multi-picture frame polarity reversal overexcitation drive method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101286313A CN101286313A (en) | 2008-10-15 |
| CN101286313B true CN101286313B (en) | 2011-06-15 |
Family
ID=40058477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100937531A Expired - Fee Related CN101286313B (en) | 2007-04-11 | 2007-04-11 | Display multi-picture frame polarity reversal overexcitation drive method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101286313B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5675795B2 (en) * | 2010-05-17 | 2015-02-25 | シャープ株式会社 | Liquid crystal display |
| CN102855852A (en) * | 2011-06-30 | 2013-01-02 | 群康科技(深圳)有限公司 | Liquid crystal display and overdriving method |
| CN103971646A (en) * | 2014-05-27 | 2014-08-06 | 广州硅芯电子科技有限公司 | Automatic low-ash complete-period compensating circuit, system and method of high-definition LED (Light Emitting Diode) display screen |
| CN107516495A (en) * | 2017-08-31 | 2017-12-26 | 京东方科技集团股份有限公司 | Detection method and device, its compensation method and the display device of pixel charging compensation |
| CN108847194A (en) * | 2018-06-22 | 2018-11-20 | 惠科股份有限公司 | Display device and driving method |
| CN109061921B (en) * | 2018-08-14 | 2021-03-02 | Oppo广东移动通信有限公司 | Preparation method and device of color-changing assembly and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5815128A (en) * | 1994-12-27 | 1998-09-29 | Seiko Instruments Inc. | Gray shade driving device of liquid crystal display |
| CN1848230A (en) * | 2005-04-04 | 2006-10-18 | 佳能株式会社 | Display apparatus and display control method therefor |
| CN101231829A (en) * | 2007-01-26 | 2008-07-30 | 钰瀚科技股份有限公司 | Multi-chart frame polarity inversion overexciting drive method of display |
-
2007
- 2007-04-11 CN CN2007100937531A patent/CN101286313B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5815128A (en) * | 1994-12-27 | 1998-09-29 | Seiko Instruments Inc. | Gray shade driving device of liquid crystal display |
| CN1848230A (en) * | 2005-04-04 | 2006-10-18 | 佳能株式会社 | Display apparatus and display control method therefor |
| CN101231829A (en) * | 2007-01-26 | 2008-07-30 | 钰瀚科技股份有限公司 | Multi-chart frame polarity inversion overexciting drive method of display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101286313A (en) | 2008-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3567578B1 (en) | Display device and driving method thereof | |
| US20080165108A1 (en) | Method for driving liquid crystal display in a multi-frame polarity inversion manner | |
| CN108831399B (en) | Display driving method and liquid crystal display device | |
| US8605024B2 (en) | Liquid crystal display device | |
| CN104751757B (en) | Display device capable of driving at low speed | |
| KR101330459B1 (en) | Liquid Crystal Display | |
| US9412313B2 (en) | Display apparatus and method of driving the same | |
| US20090278869A1 (en) | Display Device | |
| KR102453288B1 (en) | Liquid crystal display and dimming control method therof | |
| US20150145901A1 (en) | Display device and method of driving the same | |
| KR102279278B1 (en) | Display Device And Driving Method for the Same | |
| CN102667907B (en) | Liquid crystal display device and method for driving a liquid crystal display device | |
| US20020171640A1 (en) | Method of display by sub-frame driving | |
| CN101286313B (en) | Display multi-picture frame polarity reversal overexcitation drive method | |
| US20110216058A1 (en) | Display device and operating method thereof | |
| US8179356B2 (en) | Method for driving liquid crystal display with inserting gray image | |
| US20070195045A1 (en) | Liquid crystal display device | |
| JP2009205045A (en) | Electrooptical device, driving method, and electronic equipment | |
| US9478184B2 (en) | Method of driving display panel and display apparatus for performing the same | |
| US10332460B2 (en) | Display and driving method thereof | |
| KR101746616B1 (en) | A liquid crystal display apparatus and a method for driving the same | |
| Nose et al. | 35.3: A Black Stripe Driving Scheme for Displaying Motion Pictures on LCDs | |
| CN101231829A (en) | Multi-chart frame polarity inversion overexciting drive method of display | |
| CN102214450A (en) | Liquid crystal display and driving method thereof | |
| US20100315408A1 (en) | Liquid crystal display and method of driving the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20150411 |
|
| EXPY | Termination of patent right or utility model |