CN101800035A - Liquid crystal display device and driving method thereof - Google Patents
Liquid crystal display device and driving method thereof Download PDFInfo
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- CN101800035A CN101800035A CN200910005836A CN200910005836A CN101800035A CN 101800035 A CN101800035 A CN 101800035A CN 200910005836 A CN200910005836 A CN 200910005836A CN 200910005836 A CN200910005836 A CN 200910005836A CN 101800035 A CN101800035 A CN 101800035A
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Abstract
The invention relates to a liquid crystal display device, which comprises a first gamma voltage generator and a second gamma voltage generator, wherein the first gamma voltage generator and the second gamma voltage generator are connected to a first source electrode driver and a second source electrode driver respectively and generate first grayscale gamma reference voltage and second grayscale gamma reference voltage according to a first gamma curve and a second gamma curve respectively; the first source electrode driver and the second source electrode driver are respectively to an odd data wire and an even data wire, and the odd data wire and the even data wire control a first grayscale area and a second grayscale area of each sub-pixel respectively; and the first source electrode driver and the second source electrode driver convert data signals inputted from the external into a first grayscale data signal and a second grayscale data signal according to the first grayscale gamma reference voltage and the second grayscale gamma reference voltage respectively, and respectively provide the first grayscale data signal and the second grayscale data signal to the odd data wire and the even data wire respectively.
Description
Technical field
The present invention relates to a kind of display and driving method thereof, particularly relate to a kind of Liquid Crystal Display And Method For Driving that can the complementary color deviation.
Background technology
For LCD wide viewing angle technology, at present the most universal is vertical orientation (vertical aligned, VA) formula LCD.But when watching vertical orientation type liquid crystal display by the angle of inclination, display can produce color offset phenomenon (color shift), causes people's skin color, Asian's skin color especially, the phenomenon that inclined to one side indigo plant is arranged or turn white.This is because when voltage increases, transmitance in the positive visual angle gamma characteristic curve (transmissivity and gray-scale voltage relation curve) of vertical orientation type liquid crystal display also can increase thereupon, be a monotonic quantity, transmitance in the gamma characteristic curve of anorthopia angle then has buckling phenomenon (promptly being a non-monotonic quantity), make different gray scale levels but correspondence produce identical transmitance.In order to address this problem, company of Fujitsu (Fujitsu) proposes a kind of pixel segmentation vertical orientation (multi-domain vertical alignment, MVA) technology, in a pixel, form two kinds of different gray level region, for example a bright attitude gray level region (first gray level region) and a dark attitude gray level region (second gray level region), and utilize the component piezoresistance in the gamma generator to adjust and produce this each self-corresponding desirable gamma characteristic curve of two gray level region, last and utilize bright attitude shows signal that the mode switched will adjust and dark attitude shows signal to give this two different gray level region respectively, to compensate color offset phenomenon.
Please refer to shown in Figure 1ly, it is a known MVA formula LCD 10, comprises a plurality of pixels 11,12 etc., and these pixels are arranged.Each pixel comprises a red sub-pixel R, a green sub-pixels G and a blue subpixels B, and each sub-pixel has two gray level region.With pixel 11 is example, has red first gray level region 111, red second gray level region 112, green first gray level region 113, green second gray level region 114, blue first gray level region 115, reaches blue second gray level region 116.
See also Fig. 2, red first gray level region 111 drives with the red display signal of a bright attitude; Red second gray level region 112 drives (oblique line among Fig. 2 is represented to drive with dark attitude shows signal) with the red display signal of a dark attitude.Red first gray level region 111 and red second gray level region, the 112 synthetic redness that show first pixels 11 are with the colo(u)r bias and the angle of visibility of the redness of improving first pixel 11.Similarly, green and blue subpixels in first pixel 11 drive demonstration in an identical manner, to improve the colo(u)r bias and the angle of visibility of first pixel, 11 integral body.
Yet, being subject to the structure of known LCD, known MVA formula LCD is for also limitation to some extent of the adjustment degree of gamma characteristic curve, and in fact and be not easy the desirable gamma characteristic curve that present each gray level region.Therefore, how increasing the visual angle of LCD, effectively reduce color offset phenomenon and save energy resource consumption, and make LCD present better display effect efficiently, still is a present big problem.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of liquid crystal indicator and driving method thereof, utilize one group of gamma electric voltage producer (gamma voltage generator) and source electrode driver to control the odd data line specially, and another group gamma electric voltage producer and source electrode driver are controlled the even data line specially, to solve the difficult problem that above-mentioned known technology can't overcome, avoid picture aberration and bright dark inequality.
For reaching above-mentioned purpose, liquid crystal indicator of the present invention comprises many data lines, many gate lines, one first gamma electric voltage producer, one second gamma electric voltage producer, one first source electrode driver and one second source electrode drivers.Data line comprises one first data line-group and one second data line-group.Gate line and data line (crisscross) interlaced with each other form a plurality of sub-pixels.Those sub-pixels are the array arrangement and constitute an array district, and each sub-pixel comprises at least one first gray level region and at least one second gray level region.Wherein, be arranged in each first and second gray level region of each sub-pixel of delegation the data line electric connection of a data line and the second data line-group by one first switch module and a second switch assembly and the first data line-group respectively.First gamma electric voltage producer and second gamma electric voltage producer produce one first gray level gamma reference voltage and one second gamma reference voltage respectively according to same data-signal, and wherein the second gray level gamma reference voltage is different and be independent of the first gray level gamma reference voltage.First source electrode driver electrically connects the first data line-group, and according to the first gray level gamma reference voltage, to produce at least one first gray-scale data signal to the first gray level region.Second source electrode driver electrically connects the second data line-group, and according to the second gray level gamma reference voltage, to produce at least one second gray-scale data signal to the second gray level region.
Page or leaf of the present invention provides a kind of driving method of liquid crystal indicator, comprising: utilize one first gamma electric voltage producer to produce the first gray level gamma reference voltage according to the first gamma bleeder mechanism; Utilize one second gamma electric voltage producer to produce the second gray level gamma reference voltage according to the second gamma bleeder mechanism, and the second gray level gamma electric voltage independence and be different from the first gray level gamma reference voltage; A plurality of data-signal to one first source electrode drivers and one second source electrode driver are provided respectively; And, utilize first source electrode driver and convert a plurality of first gray-scale data signals to according to the first gray level gamma reference voltage data-signal that first source electrode driver is received, and the first gray-scale data signal is transferred to a plurality of first data lines, and convert a plurality of second gray-scale data signals in same time utilization second source electrode driver and according to the second gray level gamma reference voltage data-signal that second source electrode driver is received, and the second gray-scale data signal offered a plurality of second data lines, and first data line and the arrangement interlaced with each other of second data line.
Description of drawings
Fig. 1 is the synoptic diagram that the pixel of a known LCD is arranged.
Fig. 2 is the synoptic diagram of the LCD of Fig. 1 with the known method result displayed.
Fig. 3 to Fig. 6 is the synoptic diagram of the vertical direction distributing type liquid crystal indicator of first preferred embodiment according to the present invention.
Fig. 7 is the operating process synoptic diagram of the vertical direction distributing type liquid crystal indicator of the present invention's first preferred embodiment.
Fig. 8 to Figure 11 is the schematic top plan view that illustrates the dot structure of the vertical direction distributing type liquid crystal panel of second to the 5th embodiment according to the present invention respectively.
The primary clustering symbol description
10 LCD, 11 pixels
12 pixels, 24 gate drivers
The 26a first source electrode driver 26b second source electrode driver
30 liquid crystal panel 38a, first gamma electric voltage producer
38b second gamma electric voltage producer 40 time schedule controllers
111 red first gray level region, 112 red second gray level region
113 green first gray level region, 114 green second gray level region
115 blue first gray level region, 116 blue second gray level region
The A1 first gray level region A2 second gray level region
DL
OddOdd data line DL
EvenThe even data line
R red sub-pixel G green sub-pixels
B blue subpixels GL gate line
GL1 first grid polar curve V
Odd_ r first gray level the gamma curve
V
Even_ r second gray level gamma curve r the gamma curve
R_H data-signal G_H data-signal
B_H data-signal R_L data-signal
G_L data-signal B_L data-signal
TFT1 the first film transistor T FT2 second thin film transistor (TFT)
DL1 odd data line DL0 even data line
DL3 odd data line DL2 even data line
DL5 odd data line DL4 even data line
The Rr1 first gamma divider resistance Rr2 second gamma divider resistance
The Rs1 first source electrode divider resistance Rs2 second source electrode divider resistance
The Rf1 first gray level gamma reference voltage Rf2 second gray level gamma reference voltage
Embodiment
Fig. 3 to Fig. 6 is the synoptic diagram of the vertical direction distributing type liquid crystal indicator of first preferred embodiment according to the present invention, wherein Fig. 4 is the corresponding gamma curve synoptic diagram of first preferred embodiment, Fig. 5 is the change type of the embodiment of Fig. 3, and Fig. 6 is a foregoing liquid crystal panel pixels structural representation.In addition, please in the lump with reference to figure 7, it is the operating process synoptic diagram of the vertical direction distributing type liquid crystal indicator of the present invention's first preferred embodiment.The present invention mainly is distinguished at least two groups with the data line of display, for example, odd number bar data line (the first data line group) and even number bar data line (the second data line group), wherein corresponding at least two different source electrode drivers and two different gamma electric voltage producers will be distinguished by these two groups, and those source electrode drivers will be according to its corresponding gamma reference voltage that gamma electric voltage producer provided, (for example convert received sub-pixel data signal to odd data line gray-scale signal respectively, the high grade grey level signal) and even data line gray-scale signal (for example, low gray-scale signal), be sent to corresponding pixel grayscale zone more respectively, wherein, this two gamma electric voltage producer will have different gamma bleeder mechanism (a for example divider resistance) respectively, uses the gray level region of odd data line correspondence and the gray level region of even data line correspondence are carried out best modulation control.As shown in Figure 3, liquid crystal indicator comprises: a liquid crystal panel 30; One gate drivers 24 is used to drive the gate lines G L of liquid crystal panel 30; One first source electrode driver 26a is used to drive the odd data line DL of liquid crystal panel 30
OddOne second source electrode driver 26b is used to drive the even data line DL of liquid crystal panel 30
Even Time schedule controller 40 is used for control gate driver 24, the first source electrode driver 26a and the second source electrode driver 26b; One first gamma electric voltage producer 38a is used for the first gray level gamma reference voltage is offered the first source electrode driver 26a; And one second gamma electric voltage producer 38b, be used for the second gray level gamma reference voltage is offered the second source electrode driver 26b.Wherein, the first source electrode driver 26a and the second source electrode driver 26b can be arranged at the upside of active area (array district) and the downside (but not as limit) of liquid crystal panel 30 respectively, and corresponding respectively and be electrically connected to odd data line DL
OddWith even data line DL
EvenAnd the first gamma electric voltage producer 38a and the second gamma electric voltage producer 38b, then can be corresponding to the outer appropriate location of active area that the position is arranged at liquid crystal panel 30 respectively that is provided with of the first source electrode driver 26a and the second source electrode driver 26b, for example can be arranged at the upside and the downside of the active area of liquid crystal panel 30, or even can be integrated in the first source electrode driver 26a and the second source electrode driver 26b inside respectively, but not as limit.
Gate lines G L and odd data line DL
Odd, even data line DL
EvenCan be interlaced with each other and form a plurality of sub-pixels, for example each pixel in the active area of liquid crystal panel 30 includes red sub-pixel R, green sub-pixels G and blue subpixels B, and those sub-pixels are array and arrange and can constitute an array district.Each red sub-pixel R, green sub-pixels G and blue subpixels B comprise at least one first gray level region A1 and at least one second gray level region A2 respectively, and wherein each gray level region couples a first film transistor and one second thin film transistor (TFT) respectively and uses the gray-scale signal data that control writes.The first gray level region A1 and the second gray level region A2 can arrange in left and right sides mode as shown in Figure 3 at the arrangement mode of each sub-pixel, or arrange (as Fig. 1 or shown in Figure 2) with the upper and lower formula.With left and right sides arrangement mode is example, the first gray level region A1 of each sub-pixel can lay respectively at left side or the right side of the second gray level region A2, and for example each the first gray level region A1 in each subpixel area of present embodiment (as shown in Figure 3) all is positioned at the right side of the second gray level region A2.Each second gray level region A2 has at least three limits respectively can be adjacent with other sub-pixel, and protuberance tabling with at least one depressed part first gray level region A1 corresponding with it, each first gray level region A1's at least on one side then can be adjacent with the another side of each sub-pixel, wherein the depressed part of the second gray level region A2 can be (figure do not show) such as parabola shaped (as Fig. 3), semicircle, ㄍ font or triangles, and the protuberance shape of the first gray level region A1 then is complementary relationship with the depressed part of the second gray level region A2.The area of the second gray level region A2 is usually more than or equal to the area of the first gray level region A1.What specify is, shape, size and the relative position to each other of the first gray level region A1 of the present invention and the second gray level region A2 are not to exceed with the explanation of present embodiment, those skilled in the art also should be included in the scope disclosed by the invention when understanding other possible distortion or combination.In addition, sub-pixel of the present invention also can comprise the gray level region more than three, for example comprises one first gray level region A1 and two second gray level region A2 (figure does not show).
The first gray level region A1 and the second gray level region A2 of each sub-pixel can be driven by same gate lines G L, and respectively by the odd data line DL of correspondence
OddWith even data line DL
EvenWrite gray-scale signal, form the structure that a sub-pixel corresponds to a gate line and two data lines (1G-2D).In view of the above, the present invention is the structure of 1G-2D, that is two thin film transistor switch in each sub-pixel, share a gate line to drive it, and respectively by the data line that couples separately respectively the first gray level region A1 is write corresponding gray-scale signal with the second gray level region A2, with display frame.
In a scan period, the first gray level gamma reference voltage Rf1 that the first source electrode driver 26a is produced according to the first gamma electric voltage producer 38a, to convert odd data line gray-scale signal to from the sub-pixel data signal RGB that time schedule controller 40 receives, the data-signal R_H of high grade grey level for example, G_H and B_H, and the second gray level gamma reference voltage Rf2 that the second source electrode driver 26b also can be produced according to the second gamma electric voltage producer 38b simultaneously, to convert even data line gray-scale signal to from the sub-pixel data signal RGB that time schedule controller 40 receives, for example the data-signal R_L of low gray level, G_L and B_L.The first source electrode driver 26a supplies with high grade grey level data-signal R_H, G_H and B_H the odd data line DL of liquid crystal panel 30
OddThen, by opening and odd data line DL
OddThe thin film transistor switch that couples mutually writes the first gray level region A1 of corresponding redness, green, blue subpixels R, G and B respectively to drive it with high grade grey level data-signal R_H, G_H and B_H.The second source electrode driver 26b then will hang down the even data line DL of gray-scale data signal R_L, G_L and B_L supply liquid crystal panel 30
EvenThen, by opening and even data line DL
EvenThe thin film transistor switch that couples mutually writes the second gray level region A2 of corresponding redness, green, blue subpixels R, G and B respectively to drive it with low gray-scale data signal R_L, G_L and B_L.What pay special attention to is, in the present embodiment, though the first gray level region A1 and second gray level region are respectively in order to shows signal high grade grey level signal and low gray-scale signal, yet in another embodiment, it also can be respectively in order to low gray-scale signal of shows signal and high grade grey level signal, this moment, the odd data line hanged down gray-scale data signal R_L, G_L and B_L with correspondence output, the then corresponding output high grade grey level of even data line data-signal R_H, G_H and B_H.
Wherein, as shown in Figure 3, has one first gamma bleeder mechanism in the first gamma electric voltage producer 38a, one first gamma divider resistance Rr1 for example, give the first source electrode driver 26a by the first gamma divider resistance Rr1 to produce the first gray level gamma reference voltage Rf1, the second gamma electric voltage producer 38b then has one second gamma bleeder mechanism, one second gamma divider resistance Rr2 for example, and, give the second source electrode driver 26b to produce the second gray level gamma reference voltage Rf2 by the second gamma divider resistance Rr2.The second gamma bleeder mechanism independence and be different from the first gamma bleeder mechanism.That is the present invention utilizes two groups of independent and different gamma divider resistance Rr1, Rr2, produces two groups of independent and different gamma reference voltages respectively, with difference alignment processing odd data line DL
OddWith even data line DL
EvenSignal; And utilize odd data line DL
OddWith even data line DL
EvenSignal show the picture element signal of high grade grey level and low gray level respectively, that is utilize the design of gamma divider resistance Rr1 independent of each other of the present invention, Rr2, can make odd data line DL
OddWith even data line DL
EvenCorresponding gray scale level zone, the corresponding respectively first gray level gamma curve V that produces as shown in Figure 4
Odd_ the r and the second gray level gamma curve V
Even_ r, and blend gamma curve r.In other words, gamma divider resistance Rr1 and gamma divider resistance Rr2 can differ from one another and the first gray level gamma curve V whole or that at least a portion does not overlap mutually in corresponding respectively generation
Odd_ the r and the second gray level gamma curve V
Even_ r.In addition, preferably, the design of the first gamma divider resistance Rr1 is different from the second gamma divider resistance Rr2, for example, the resistance value of a plurality of resistance that both were connected in series or resistance number all have at least a part inequality, that is it can make optimized adaptability design at the picture demonstration demand in odd number and even data line corresponding gray scale level zone.In addition, the gamma bleeder mechanism in the gamma electric voltage producer of the present invention also is not that embodiment with divider resistance exceeds, and any circuit arrangement that produces a plurality of reference voltages all within the scope of the present invention.
Therefore, the present invention defines multi-group data line (for example odd number bar data line-group and even data line-group) by the data line with display, and will be not on the same group data line couple different source electrode drivers respectively, and the design of different source electrode drivers corresponding different gamma electric voltage producers of difference or corresponding different gamma bleeder mechanisms, first source electrode driver and second source electrode driver can operate simultaneously in the same time, produce odd data line gray-scale signal (high grade grey level data-signal) and even data line gray-scale signal (low gray-scale data signal) respectively driving corresponding gray level region, and also can make very, the gamma curve in even data line corresponding gray scale level zone can be pressed close to desired ideal gamma curve.In addition, first source electrode driver and second source electrode driver can give odd data line and even data line with high grade grey level data-signal and low gray-scale data signal respectively in the same time, also can give odd data line and even data line in high grade grey level data-signal and the low gray-scale data signal that different time will produce.
In addition as shown in Figure 5, change in the example of the present invention one, the first source electrode driver 26a of the present invention and the second source electrode driver 26b also can have one first source electrode bleeder mechanism respectively, one first source electrode divider resistance Rs1 for example, with one second source electrode bleeder mechanism, one second source electrode divider resistance Rs2 for example.The first source electrode divider resistance Rs1 is the corresponding first gray level gamma curve V
Odd_ r and designing, it can produce corresponding high grade grey level data-signal R_H, G_H and B_H (corresponding to the first gray level gamma curve V according to the gray-scale signal instruction of first gray level gamma reference voltage Rf1 that is received and time schedule controller 40
Odd_ r).In like manner, the second source electrode divider resistance Rs2 is the corresponding second gray level gamma curve V
Even_ r and designing, it can be according to the gray-scale signal instruction of the second gray level gamma reference voltage Rf2 that receives with time schedule controller 40, produces low gray-scale data signal R_L, the G_L of correspondence and B_L (corresponding to the second gray level gamma curve V
Even_ r).In addition, the first source electrode divider resistance Rs1 is different from the second source electrode divider resistance Rs2, that is the first source electrode bleeder mechanism independence and be different from the second source electrode bleeder mechanism, it can make optimized adaptability design at the demand in odd number and even data line corresponding gray scale level zone as the first gamma divider resistance Rr1 and the second gamma divider resistance Rr2; Thus, the first gamma divider resistance Rr1, the second gamma divider resistance Rr2, the first source electrode divider resistance Rs1 and the second source electrode divider resistance Rs2 all can distinguish independent adjustment, change to present more accurate gray level.
In comparison, use look-up table (look-up table) to produce the method for high grade grey level and low gray-scale signal in the traditional way, time schedule controller is run up cooperate look-up table, and the noise that runs up causes the deterioration of image quality easily.In addition, another traditional way utilize single gamma electricity group string and in the mode switched to produce the method for high grade grey level and low gray-scale signal, also have identical problem and produce.In other words, the traditional operation mode often needs periodic the switching or computing periodically respectively, can obtain two kinds of different grey-scale signals, not only expend the more processing time, also can increase the running load of system, and can't do optimized adjustment to high grade grey level or the corresponding respectively gamma curve of low gray level region, that is be difficult to reach the desired ideal gamma curve in different grey-scale zone, the present invention then just can avoid this problem to produce.Be noted that the present invention also can be based on further comprising a look-up table under the aforementioned disclosed framework, the whole gray level control system can be done more accurate regulation and control thus.
In addition, because the present invention controls the signal of odd data line and even data line respectively, so each source electrode driver, with only needing to produce the signal of same polarity, do not need the polarity of mutual switching signal, so can reach the advantage of power saving.That is high grade grey level data-signal R_H, G_H that the first source electrode driver 26a only must output device first polarity and B_H give each odd data line DL of the first data line-group
Odd, and low gray-scale data signal R_L, G_L that the second source electrode driver 26b only must output device second polarity and B_L give each even data line DL of the second data line-group
Even, wherein first polarity is opposite with second polarity.As shown in Figure 6, the first gray level region A1 and the second gray level region A2 are respectively by the first film transistor T FT1 (first switch module) and the second thin film transistor (TFT) TFT2 (second switch assembly) drive, the first film transistor T FT1 that is connected to odd data line DL1, DL3 and DL5 all is electrically connected to the first gray level region A1, and the first film transistor T FT2 that is connected to even data line DL0, DL2 and DL4 all is electrically connected to the second gray level region A2.Thus, be staggered about the first gray level region A1 of red sub-pixel R, green sub-pixels G and blue subpixels B and the direction of the second gray level region A2 one another along gate lines G L.Each sub-pixel of liquid crystal indicator can be by the driving respectively of odd data line DL1, DL3 and DL5 and even data line DL0, DL2 and DL4, each source electrode driver, with only needing to produce the signal of same polarity, do not need the polarity of mutual switching signal, and the polarity with row counter-rotating distributes.For example, high grade grey level data-signal R_H, G_H that the first source electrode driver 26a only must output device first polarity and B_H give each odd data line DL of the first data line-group
Odd, and low gray-scale data signal R_L, G_L that the second source electrode driver 26b only must output device second polarity and B_L give each even data line DL of the second data line-group
Even, wherein first polarity is opposite with second polarity.
The right side of each sub-pixel and the electric field in left side can be controlled the liquid crystal in sub-pixel right side and left side respectively, thereby improve color offset phenomenon.Wherein, the shape of sub-pixel can be defined by the shape of colored filter, and the shape of the first gray level region A1 and the second gray level region A2 can be defined by the shape of pixel electrode.That is, can have independently pixel electrode respectively among the first gray level region A1 and the second gray level region A2, and driven by separately thin film transistor (TFT) TFT1, TFT2 respectively, and gray level region or pixel electrode can have semicircle, ㄍ font, or parabolic curve shape zone.Pixel electrode and thin film transistor (TFT) TFT1, TFT2 form on infrabasal plate, and with upper substrate in the common electrode that forms form electric field, drive liquid crystal molecule vertical orientated between upper and lower base plate thus.Thin film transistor (TFT) TFT can supply with pixel electrode with the data-signal of data line DL according to the sweep signal of gate lines G L.Thin film transistor (TFT) TFT1, TFT2 comprise the grid that is electrically connected to gate lines G L, are electrically connected to the source electrode of data line DL, and the base stage that is electrically connected to pixel electrode.
The first gray level region A1 and the second gray level region A2 separated from one another in each sub-pixel can utilize the thin film transistor (TFT) TFT that is connected on the different pieces of information line DL1-DL4 and drive.For example, as shown in Figure 5, when the thin film transistor (TFT) TFT between odd data line DL1, DL3 and DL5 and the first grid polar curve GL1 drives, can open the first gray level region A1 of red sub-pixel R, green sub-pixels G and blue subpixels B.When the thin film transistor (TFT) TFT between even data line DL0, DL2 and DL4 and the first grid polar curve GL1 drives, can open the second gray level region A2 of red sub-pixel R, green sub-pixels G and blue subpixels B.
In addition, according to the LCD of previous embodiment, its driving method as shown in Figure 7.At first, time schedule controller provides pixel data signal to first and second source electrode drivers, and wherein this pixel data signal comprises each color sub-pixel data signal.First and second gamma electric voltage producers by its each self-corresponding first and second bleeder mechanisms, provide the first and second gray level gamma reference voltages to first and second source electrode drivers respectively.Then, first and second source electrode drivers are according to the pixel data signal and the gamma reference voltage that receive, can when same time, handle the conversion process of related pixel data-signal, and simultaneously or do not transmit the gray-scale data signal simultaneously and give the odd and even number data line.That is, the first gray level gamma reference voltage that first source electrode driver is provided according to first gamma electric voltage producer, convert pixel data signal to the first gray-scale data signal (high grade grey level data-signal) and give the odd data line, to drive first gray level region; And the second gray level gamma reference voltage that second gamma electric voltage producer also can be provided according to second gamma electric voltage producer simultaneously converts pixel data signal to the second gray-scale data signal (low gray-scale data signal) to the even data line, to drive second gray level region.What specify is, high grade grey level data-signal of the present invention is not to need to exceed by the transmission of odd data line, and in another embodiment, it also can transmit by the even data line, and this moment, the odd data line was then in order to transmit low gray-scale signal.Therefore in comparison, the present invention does not need must utilize the mode of switching can produce high grade grey level and low gray-scale signal as traditional method, so the present invention can effectively promote the panel operational paradigm, and allows the display quality in each pixel grayscale zone reach desirable requirement.
In view of the above, first source electrode driver and second source electrode driver can operate simultaneously in the same time, produced high grade grey level data-signal and low gray-scale data signal respectively.First source electrode driver and second source electrode driver can give odd data line and even data line with high grade grey level data-signal and low gray-scale data signal respectively in the same time in addition, also can give odd data line and even data line in high grade grey level data-signal and the low gray-scale data signal that different time will produce.
Previous embodiment is a preferred construction of the present invention and mode of operation, yet the present invention need not be confined to aforementioned structure and mode of operation.For example, though first and second source electrode driver 26a, 26b are arranged at the downside and the upside of active area respectively, simultaneously also corresponding respectively first and second gamma electric voltage producer 38a of first and second gamma electric voltage producer, 38b and be positioned at the upside or the downside of active area be not so as limit.In addition, the design of first and second gamma electric voltage producer of the present invention and first and second source electrode drivers also can be applicable to the display of 2G-1D.In addition, in another embodiment, first and second gamma electric voltage producer also can be integrated into first and second source electrode driver.In addition, the present invention also need not be limited as vertical orientation type liquid crystal display.
Fig. 8 to Figure 11 is the schematic top plan view that illustrates the dot structure of the vertical direction distributing type liquid crystal panel of second to the 5th embodiment according to the present invention respectively.
Shown in the embodiment of Fig. 8 and Fig. 9, compared to the liquid crystal panel shown in Fig. 6, they are different is in the array of pixels district that definable goes out a plurality of first shapes configurations and second shape disposes, and each first and second shapes configuration comprises at least one sub-pixel, wherein first gray level region A1 in the sub-pixel in each shape configuration and the arrangement mode of the second gray level region A2 are identical, and configuration of first shape and the configuration of second shape can be staggered along data line or gate line.As the embodiment of Fig. 8, the configuration of first and second shapes comprises a sub-pixel respectively.In the configuration of first shape, it is right-hand that the first gray level region A1 is arranged at the second gray level region A2, and in the configuration of second shape, the first gray level region A1 is arranged at the second gray level region A2 left, and wherein first and second shape configuration system is along the direction of gate lines G L and along the arrangement interlaced with each other of the direction of data line DL0-DL5.It is adjacent with sub-pixel around it that each second gray level region A2 can have three limits equally, and it is adjacent with on every side sub-pixel that each first gray level region A2 then has one side at least.The first film transistor T FT1 that is connected to odd data line DL1, DL3 and DL5 then is electrically connected to the first gray level region A1, and the first film transistor T FT2 that is connected to even data line DL0, DL2 and DL4 then is electrically connected to the second gray level region A2.
Thus, the first gray level region A1 of red sub-pixel R, green sub-pixels G and blue subpixels B and the second gray level region A2 are staggered up and down one another along the direction of data line.And each source electrode driver of liquid crystal indicator will all only need the signal of the identical and constant polarity of output, the effect that the polarity that can make display frame reach a counter-rotating distributes.Therefore, the present invention not only can reduce power consumption and load, can avoid the scintillation (flicker) and dynamic pseudo-shadow phenomenon (motion artifact) of display panel simultaneously.In other embodiments, aforementioned first and second shape configuration can be staggered along the direction of each gate line or along the direction of each data line each other.
Shown in the embodiment of Fig. 9, compared to the liquid crystal panel shown in Fig. 8, its difference is, each first shape configuration comprises two sub-pixels respectively with the configuration of second shape, for example with the first pixel behavior example in array of pixels district, in the configuration of first shape, it is right-hand that the first gray level region A1 is arranged at the second gray level region A2, and in the configuration of second shape, the first gray level region A1 is arranged at the second gray level region A2 left.That is along the direction of data line DL0-DL5, per two sub-pixels constitute shape configuration, and first and second shape configuration is staggered along the direction of data line DL0-DL5.And first and second shape configuration also is staggered along the direction of gate line.In addition, the first film transistor T FT1 that is connected to odd data line DL1, DL3 and DL5 then is electrically connected to the first gray level region A1, and the first film transistor T FT2 that is connected to even data line DL0, DL2 and DL4 then is electrically connected to the second gray level region A2.Thus, each source electrode driver of liquid crystal indicator with only needing to produce the signal of same polarity, does not need the polarity of mutual switching signal, and has the polarity distribution of similarity counter-rotating.The first source electrode driver 26a only must output device first polarity high grade grey level data-signal R_H, G_H and B_H give odd data line DL1, DL3 and DL5, and low gray-scale data signal R_L, G_L and B_L that the second source electrode driver 26b only must output device second polarity give even data line DL0, DL2 and DL4.
In addition, Figure 10 and Figure 11 illustrate other two kinds of embodiments respectively.As shown in Figure 10 and Figure 11, the first gray level region A1 in its array of pixels district in each sub-pixel all is provided with the right side of the second gray level region A2, the embodiment of Figure 10 wherein, with each gray level region is the unit, the polarity that has a counter-rotating with formation distributes, and the embodiment of Figure 11 is the polarity distribution that unit has a counter-rotating with each sub-pixel, that is the first gray level region A1 and the second gray level region A2 in its same sub-pixel have identical polar.As Figure 10 and embodiment shown in Figure 11, the polarity of the output signal of its first source electrode driver and second source electrode driver then changes once every a gate line sweep time.
As mentioned above, the present invention mainly is distinguished into the display data line two groups, for example, odd number bar data line (the first data line group) and even number bar data line (the second data line group), wherein corresponding two different source electrode drivers and gamma electric voltage producer will be distinguished by these two groups, data-signal with the sub-pixel that display is received converts odd data line gray-scale signal (for example high grade grey level signal) and even data line gray-scale signal (for example low gray-scale signal) respectively to, wherein, this two gamma electric voltage producer will have different bleeder mechanism (for example having different divider resistances) respectively, uses odd data line gray level region and even data line gray level region are carried out best gray level regulation and control.In addition, two different source electrode drivers of the present invention also can have difference and divider resistance independently.Therefore, the present invention can utilize and regulate high grade grey level and low gray level gamma divider resistance or source electrode divider resistance separately, presents accurate gray level and changes control.That is the present invention can be effectively adjusts individually at the required data-signal of odd data line and even data line, and can avoid classic method can not handle the problem of two kinds of different grey-scale data-signals simultaneously.In addition, the present invention not only can reduce power consumption and load by the display data line being distinguished into two groups and arrange in pairs or groups suitable subpixel configuration and signal polarity control, can avoid the scintillation and the dynamic pseudo-shadow phenomenon of display panel simultaneously.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claims of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (23)
1. liquid crystal indicator comprises:
Many data lines comprise one first data line-group and one second data line-group;
Many gate lines, with a plurality of sub-pixels of these data lines formation interlaced with each other, those sub-pixels are the array arrangement and constitute an array district, and each this sub-pixel comprises at least one first gray level region and at least one second gray level region, wherein, be arranged in this first and second gray level region of each this sub-pixel of delegation the data line electric connection of a data line and this second data line-group by one first switch module and a second switch assembly and this first data line-group respectively;
One first gamma electric voltage producer comprises one first gamma bleeder mechanism, and in order to produce one first gray level gamma reference voltage, wherein this first gamma bleeder mechanism can correspondingly produce one first gray level gamma curve;
One second gamma electric voltage producer, comprise one second gamma bleeder mechanism, in order to produce one second gray level gamma reference voltage, wherein this second gamma bleeder mechanism can corresponding produce one second gray level gamma curve, and this second gray level gamma curve is different from at least a portion and is not overlapped in this first gray level gamma curve;
One first source electrode driver electrically connects this first data line-group, and according to this first gray level gamma reference voltage, to produce at least one first gray-scale data signal to those first gray level region;
One second source electrode driver electrically connects this second data line-group, and according to this second gray level gamma reference voltage, to produce at least one second gray-scale data signal to those second gray level region.
2. liquid crystal indicator as claimed in claim 1, wherein this first source electrode driver comprises one first source electrode bleeder mechanism corresponding to this first gray level gamma curve, and this second source electrode driver comprises one second source electrode bleeder mechanism corresponding to this second gray level gamma curve, and this first source electrode bleeder mechanism independence and be different from the second source electrode bleeder mechanism.
3. liquid crystal indicator as claimed in claim 1, wherein this first gamma electric voltage producer and this second gamma electric voltage producer lay respectively at the upper and lower both sides in this array district of this display panels.
4. liquid crystal indicator as claimed in claim 1, wherein the protuberance tabling of this second gray level region respectively with at least one depressed part this first gray level region corresponding with it.
5. liquid crystal indicator as claimed in claim 4, wherein respectively this depressed part of this second gray level region system is parabola shaped, semicircle, ㄍ font or triangle.
6. liquid crystal indicator as claimed in claim 1, wherein those of those sub-pixels first gray level region and those second gray level region are staggered one another along the direction of this gate line respectively.
7. liquid crystal indicator as claimed in claim 1, wherein this first gray-scale data signal is a high grade grey level data-signal, and this second gray-scale data signal is a low gray-scale data signal.
8. liquid crystal indicator as claimed in claim 1, wherein this first source electrode driver this first gray-scale data signal of giving this first data line-group is first polarity, and this second gray-scale data signal that this second source electrode driver gives this second data line-group is second polarity, and this first polarity is in contrast to this second polarity.
9. liquid crystal indicator as claimed in claim 8, wherein those first gray level region and those second gray level region have the polarity distribution of row counter-rotating.
10. liquid crystal indicator as claimed in claim 8, wherein those first gray level region and those second gray level region have the polarity distribution of a counter-rotating.
11. liquid crystal indicator as claimed in claim 1, wherein this first source electrode driver gives in those first gray-scale data signals of this first data line-group, polarity is opposite each other for the signal of wantonly two adjacent these first data lines, and this second source electrode driver gives in those second gray-scale data signals of this second data line-group, and polarity is opposite each other for the signal of wantonly two adjacent these second data lines.
12. liquid crystal indicator as claimed in claim 11, wherein those first gray level region and those second gray level region have the polarity distribution of a counter-rotating.
13. liquid crystal indicator as claimed in claim 1, define a plurality of first shape configurations and the configuration of second shape in some of those sub-pixels, each this first and second shapes configuration comprises at least one this sub-pixel, and it is right-hand that this first gray level region of each this sub-pixel in this first shape configuration is arranged at this second gray level region, and this first gray level region of each this sub-pixel in this second shape configuration is arranged at this second gray level region left, and this first is all to be staggered along the direction of this gate line respectively or along the direction of this data line respectively with the configuration of this second shape each other, or all is staggered along this gate line respectively and the direction of this data line respectively.
14. liquid crystal indicator as claimed in claim 4, wherein this first gray level bleeder mechanism and this second gray level bleeder mechanism are made of one first gamma divider resistance and one second gamma divider resistance respectively, and this first with this second gamma divider resistance in comprise at least one resistance differing from each other.
15. liquid crystal indicator as claimed in claim 14, wherein this first source electrode bleeder mechanism and this second source electrode bleeder mechanism are made of one first source electrode divider resistance and one second source electrode divider resistance respectively, and this first with this second source electrode divider resistance in comprise at least one resistance differing from each other.
16. liquid crystal indicator as claimed in claim 1, wherein this first gamma reference voltage is integrated in first source electrode driver, and this second gamma reference voltage is integrated in this second source electrode driver.
17. liquid crystal indicator as claimed in claim 1, wherein this first data line-group is made of the odd data line of these data lines, and this second data line-group is made of the even data line of these data lines.
18. liquid crystal indicator as claimed in claim 1, wherein respectively the area of this first gray level region is less than or equal to the respectively area of this second gray level region.
19. the driving method of a liquid crystal indicator comprises:
Utilize one first gamma electric voltage producer and produce one first gray level gamma reference voltage according to the first gamma bleeder mechanism, wherein this first gamma bleeder mechanism can correspondingly produce one first gray level gamma curve;
Utilize one second gamma electric voltage producer and produce one second gray level gamma reference voltage according to the second gamma bleeder mechanism, wherein this second gamma bleeder mechanism can correspondingly produce one second gray level gamma curve, and this second gray level gamma curve is different from and at least a portion is not overlapped in this first gray level gamma curve;
A plurality of data-signal to one first source electrode drivers and one second source electrode driver are provided respectively;
Utilize this first source electrode driver and convert a plurality of first gray-scale data signals to, and convert a plurality of second gray-scale data signals in this second source electrode driver of same time utilization and according to this second gray level gamma reference voltage those data-signals that this second source electrode driver is received according to this first gray level gamma reference voltage those data-signals that this first source electrode driver is received; And
Simultaneously those first gray-scale data signals and this second gray-scale data signal are transferred to a plurality of first data lines and a plurality of second data line respectively, and those first data lines and the arrangement interlaced with each other of those second data lines.
20. liquid crystal indicator as claimed in claim 19, wherein this first source electrode driver is according to one first source electrode bleeder mechanism, produce this a plurality of first gray-scale data signals, and this second source electrode driver is according to one second source electrode bleeder mechanism, produce this a plurality of second gray-scale data signals, and this first source electrode bleeder mechanism independence and be different from the second source electrode bleeder mechanism.
21. liquid crystal indicator as claimed in claim 19, wherein those first data lines and those second data lines are respectively the odd data line and the even data line constitutes.
22. liquid crystal indicator as claimed in claim 19, wherein those first gray-scale data signals have one first polarity, and those second gray-scale data signals have one second polarity, and this first polarity is in contrast to this second polarity.
23. liquid crystal indicator as claimed in claim 19, wherein this first source electrode driver gives in those first gray-scale data signals of those first data lines, polarity is opposite each other for the signal of wantonly two adjacent these first data lines, and this second source electrode driver gives in those second gray-scale data signals of those second data lines, and polarity is opposite each other for the signal of wantonly two adjacent these second data lines.
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| CN200910005836A CN101800035A (en) | 2009-02-05 | 2009-02-05 | Liquid crystal display device and driving method thereof |
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| CN200910005836A CN101800035A (en) | 2009-02-05 | 2009-02-05 | Liquid crystal display device and driving method thereof |
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Application publication date: 20100811 |