CN102194400B - Driving method of display panel and display device adopting same - Google Patents
Driving method of display panel and display device adopting same Download PDFInfo
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- CN102194400B CN102194400B CN 201110158963 CN201110158963A CN102194400B CN 102194400 B CN102194400 B CN 102194400B CN 201110158963 CN201110158963 CN 201110158963 CN 201110158963 A CN201110158963 A CN 201110158963A CN 102194400 B CN102194400 B CN 102194400B
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Abstract
A driving method of a display panel and a display device using the same. The display panel is provided with a plurality of pixels, a plurality of data lines, a plurality of scanning lines and a plurality of common electrodes. The pixels are arranged in a matrix, the data lines and the scanning lines are electrically coupled with the pixels, and the common electrodes are all arranged in a lower substrate of the display panel. The driving method comprises the following steps: providing a plurality of common potentials with different time sequences to the common electrode, wherein each common potential has two levels; and providing a plurality of grid signals with different time sequences to the scanning lines in a picture display period to start the pixels, and switching the level of the common potential corresponding to the pixels to be started before the pixels are started.
Description
[technical field]
The present invention is the field relevant for display technique, and particularly relevant for a kind of driving method and a kind of display device that adopts the method for display panel.
[background technology]
In traditional row counter-rotating (rowinversion) Driving technique, be the sweep trace that is numbered odd number that drives in regular turn earlier in the display panel mostly, and then drive the sweep trace that is numbered even number in regular turn, and the upper substrate of display panel (being colored filter substrate) all adopts same common electric potential with infrabasal plate (being plurality of groups of substrates of thin-film transistor).Fig. 1 i.e. the signal sequential that adopts of Driving technique and the synoptic diagram of common electric potential sequential for this reason.In Fig. 1, indicate Row[1], Row[3] and Row[5] represent the first row picture element, the 3rd row picture element and the corresponding signal of the 5th row picture element respectively, indicate Row[2], Row[4] and Row[6] represent secondary series picture element, the 4th row picture element and the corresponding signal of the 6th row picture element respectively, sign Vcom then is expressed as common electric potential.
Yet such Driving technique can make the picture element row that are numbered odd number and the picture element row that are numbered even number that the inconsistent problem of brightness takes place, and also can make the problem of whole display panel generation brightness irregularities (being so-called Mura phenomenon).Above problem will be described in detail as follows.
The picture element equivalent electrical circuit of the conventional display panels of row counter-rotating Driving technique is adopted in explanation first.Fig. 2 has namely illustrated described picture element equivalent electrical circuit.Please refer to Fig. 2, picture element 206 mainly is made up of with picture element electric capacity 212 thin film transistor (TFT) 208, storage capacitors 210.The grid electric property coupling one scan line 202 of thin film transistor (TFT) 208, and a wherein source of thin film transistor (TFT) 208/drain electrode electric property coupling one data line 204.The wherein common electrode Vco_Cst of an end electric property coupling infrabasal plate of storage capacitors 210, and the wherein common electrode Vcom_Clc of an end electric property coupling upper substrate of picture element electric capacity 212.Common electrode Vcom_Cst and Vcom_Clc all are electrically coupled to same common electric potential.In addition, thin film transistor (TFT) 208, storage capacitors 210 are so-called pixel electrode with picture element electric capacity 212 three's phase electric property coupling places.
All picture elements of supposing conventional display panels all will show identical GTG, and the change in voltage of so arbitrary online data, and the change in voltage of common electric potential Vcom will be as shown in Figure 3.Fig. 3 is numbered the inconsistent problem of brightness of the picture element brightness that is listed as and the picture element row that are numbered even number of odd number in order to explanation.Please refer to Fig. 3, the picture of each picture all is divided into two time sections during showing, represents with sign II to indicate I respectively.N is natural number.In time section I, open the picture element row that are numbered odd number in regular turn, and in time section II, open the picture element row that are numbered even number in regular turn.In addition, the waveform table that indicates 302 indications is shown the change in voltage of common electric potential Vcom, the waveform table that indicates 304 indications is shown the change in voltage of arbitrary online data, the waveform table that indicates 306 indications is shown the change in voltage on arbitrary pixel electrode of the arbitrary picture element row that are numbered odd number, and the waveform table that indicates 308 indications is shown the change in voltage on arbitrary pixel electrode of the arbitrary picture element row that are numbered even number.Above-mentioned common electric potential Vcom has two position standards.When the voltage of online data during greater than the voltage of common electric potential Vcom, be loaded the picture element that shows data and can present positive polarity; And when the voltage of online data during less than the voltage of common electric potential Vcom, be loaded the picture element that shows data and can present negative polarity.
See waveform 306 described change in voltage modes now first.In the time of each picture section I, owing to only open the picture element row that are numbered odd number in regular turn, so the voltage level on each pixel electrode in these picture element row can be pulled to the voltage level of online data; And whenever by time section I entry time section II the time, because being numbered the picture element row of odd number all is closed, make each storage capacitors and each picture element electric capacity in these picture element row all present suspension joint (floating) state, and this moment, common electric potential Vcom changed the position standard, so the voltage level on each pixel electrode in these picture elements row can change along with the change of common electric potential Vcom.And by waveform 306 and waveform 304 as can be known, in the time of each picture section II, be numbered and all can have very big pressure reduction between each pixel electrode of picture element row of odd number and the corresponding data line, thereby cause thin film transistor (TFT) to leak electricity for a long time.
Next see waveform 308 described change in voltage modes.In the time of each picture section II, owing to only open the picture element row that are numbered even number in regular turn, so the voltage level on each pixel electrode in these picture element row can be pulled to the voltage level of online data; And whenever by time section I entry time section II the time, it is accurate that common electric potential Vcom just changes the position, and the voltage level on each pixel electrode during the feasible picture element that is numbered even number is listed as changes along with the change of common electric potential Vcom.Yet, because these picture elements row are unlocked immediately, make the voltage level on each pixel electrode in these picture elements row be pulled to the voltage level of online data immediately.Therefore, only be numbered between each pixel electrode of picture element row of even number and the corresponding data line and can change position accurate moment at common electric potential Vcom and have very big pressure reduction, so the electric leakage time of the thin film transistor (TFT) in these picture elements row is very short.
By above explanation as can be known, owing to be numbered the electric leakage asynchronism(-nization) of electric leakage time and the thin film transistor (TFT) of the picture element row that are numbered even number of thin film transistor (TFT) of the picture element row of odd number, thereby cause the brightness of the picture element row that are numbered odd number and the inconsistent problem of brightness of the picture element row that are numbered even number.
Fig. 4 is in order to illustrate the problem of whole display panel generation brightness irregularities.In Fig. 4, indicate with the identical person of sign among Fig. 3 and be expressed as same object.Different with Fig. 3 is that the waveform 302 among Fig. 4 illustrates the actual change in voltage of common electric potential Vcom.Scheme as can be known thus, after common electric potential Vcom changed the position standard, the pressure reduction of the voltage of common electric potential Vcom and online data can dwindle gradually.This expression, in time section II, the voltage of the demonstration data that K+1 the picture element row of opening load can be listed as the voltage of the demonstration data that load less than K the picture element of opening, and wherein K is natural number.Similarly, in time section I, the voltage of the demonstration data that K+1 the picture element row of opening load can be listed as the voltage of the demonstration data that load less than K the picture element of opening.In addition, during the picture of same picture shows in, the voltage of the demonstration data that the voltage of the demonstration data that the K that opens picture element row that are numbered odd number load can load less than the K that opens picture element row that are numbered odd number.So, just cause the brightness meeting of display panel from top to bottom to successively decrease or increase progressively, thereby produce the problem of brightness irregularities.
[summary of the invention]
Purpose of the present invention is exactly that a kind of driving method of display panel is being provided, and it can solve the brightness irregularities problem that tradition row counter-rotating Driving technique produces.
Another object of the present invention is providing a kind of display device exactly, and it adopts above-mentioned driving method.
The present invention proposes a kind of driving method of display panel.Described display panel has a plurality of picture elements, many data lines, multi-strip scanning line and a plurality of common electrodes.Above-mentioned picture element is arranged in a matrix, above-mentioned data line and the above-mentioned picture element of above-mentioned sweep trace electric property coupling, and above-mentioned common electrode all is arranged in the infrabasal plate of display panel.This driving method includes the following step: provide the different common electric potential of a plurality of sequential to above-mentioned common electrode, wherein each common electric potential has first standard and second standard; And in during a picture shows, provide the different signal of a plurality of sequential to above-mentioned sweep trace, in order to opening above-mentioned picture element, and before picture element is opened, just switching desire earlier, to open the position of the corresponding common electric potential of picture element accurate.
In an embodiment of above-mentioned driving method, drive earlier the sweep trace of first group in regular turn, and then drive the sweep trace of second group in regular turn, and when driving the sweep trace of first group, the corresponding common electric potential of the picture element that is unlocked presents first above-mentioned standard, and when driving the sweep trace of second group, the corresponding common electric potential of the picture element that is unlocked presents second above-mentioned standard.
In an embodiment of above-mentioned driving method, more include the following step: provide the first polarity data signal to above-mentioned data line so that have first polarity corresponding to the picture element of first group's sweep trace, and provide the second polarity data signal to above-mentioned data line so that have second polarity corresponding to the picture element of second group's sweep trace.
In an embodiment of above-mentioned driving method, above-mentioned first group's sweep trace is odd number bar sweep trace, and above-mentioned second group's sweep trace is even number bar sweep trace.
In an embodiment of above-mentioned driving method, above-mentioned first polarity is opposite with the polarity of above-mentioned second polarity.
In an embodiment of above-mentioned driving method, more include the following step: the sweep trace that will be numbered odd number is divided into a plurality of groups in regular turn, and the sweep trace that will be numbered even number is divided into a plurality of groups in regular turn, and wherein each group includes N bar sweep trace, and N is natural number; And drive sweep trace in the group in regular turn in the mode of each group, and the numbering of the sweep trace on the time in the wherein group of two adjacent groups is all odd number, and the numbering of the sweep trace in another group is all even number, and drive when being numbered the sweep trace of odd number, the corresponding common electric potential of the picture element that is unlocked presents first above-mentioned standard, and drive when being numbered the sweep trace of even number, the corresponding common electric potential of the picture element that is unlocked presents second above-mentioned standard.
In an embodiment of above-mentioned driving method, more include the following step: provide the first polarity data signal to above-mentioned data line so that have first polarity corresponding to the picture element of odd-numbered scan lines, and provide the second polarity data signal to above-mentioned data line so that have second polarity corresponding to the picture element of even-line interlace line, wherein, first polarity is opposite with the polarity of second polarity.
The present invention proposes a kind of display device in addition.This display device includes display panel, data driver, scanner driver, time schedule controller and common electric potential supply circuit.Display panel has a plurality of picture elements, multi-strip scanning line, many data lines and a plurality of common electrode.Above-mentioned picture element is arranged in a matrix, above-mentioned data line and the above-mentioned picture element of above-mentioned sweep trace electric property coupling, and above-mentioned common electrode all is arranged in the infrabasal plate of display panel.The above-mentioned data line of above-mentioned data driver electric property coupling, and the above-mentioned sweep trace of above-mentioned scanner driver electric property coupling.Time schedule controller is in order in during a picture shows, the gated sweep driver provides the different signal of a plurality of sequential to above-mentioned sweep trace, in order to opening above-mentioned picture element, and time schedule controller also sees through above-mentioned data line the demonstration data of correspondence is loaded the picture element that is unlocked in order to control data driver.As for the common electric potential supply circuit, it is in order to provide the different common electric potential of a plurality of sequential to above-mentioned common electrode, wherein each common electric potential has first standard and second standard, and before picture element was opened, just the position of the corresponding common electric potential of switching desire unlatching picture element was accurate earlier for the common electric potential supply circuit.
In an embodiment of above-mentioned display device, time schedule controller gated sweep driver drives earlier the sweep trace of first group in regular turn, and then drive the sweep trace of second group in regular turn, and when scanner driver drives the sweep trace of first group, the corresponding common electric potential of the picture element that is unlocked presents first above-mentioned standard, and when scanner driver drove the sweep trace of second group, the corresponding common electric potential of the picture element that is unlocked presented second above-mentioned standard.
In an embodiment of above-mentioned display device, data driver provides the first polarity data signal to above-mentioned data line so that have first polarity corresponding to the picture element of first group's sweep trace, and provides the second polarity data signal to above-mentioned data line so that have second polarity corresponding to the picture element of second group's sweep trace.
In an embodiment of above-mentioned display device, first above-mentioned group's sweep trace is odd number bar sweep trace, and second above-mentioned group's sweep trace is even number bar sweep trace.
In an embodiment of above-mentioned display device, above-mentioned first polarity is opposite with the polarity of above-mentioned second polarity.
In an embodiment of above-mentioned display device, the sweep trace that time schedule controller will be numbered odd number is divided into a plurality of groups in regular turn, and the sweep trace that will be numbered even number is divided into a plurality of groups in regular turn, and wherein each group includes N bar sweep trace, and N is natural number.Time schedule controller also gated sweep driver drives sweep trace in the group in regular turn in the mode of each group, wherein the numbering of the sweep trace in the wherein group of two adjacent groups is all odd number on the time, and the numbering of the sweep trace in another group is all even number, and when the scanner driver driving is numbered the sweep trace of odd number, the corresponding common electric potential of the picture element that is unlocked presents first above-mentioned standard, and when the scanner driver driving was numbered the sweep trace of even number, the corresponding common electric potential of the picture element that is unlocked presented second above-mentioned standard.
In an embodiment of above-mentioned display device, data driver provides the first polarity data signal to above-mentioned data line so that have first polarity corresponding to the picture element of odd-numbered scan lines, and provide the second polarity data signal to above-mentioned data line so that have second polarity corresponding to the picture element of even-line interlace line, wherein, first polarity is opposite with the polarity of second polarity.
The present invention solves the means of foregoing problems, is a plurality of common electrodes are set in the infrabasal plate of display panel, and the same community electrode of picture element electric property coupling of same sweep trace institute electric property coupling.Any common electrode then is not set in the upper substrate of display panel.Then, provide the different common electric potential of a plurality of sequential to above-mentioned common electrode, and before picture element is opened, open the position standard of the corresponding common electric potential of picture element with regard to switching desire earlier.Owing to the variation along with same common electric potential of the voltage of the pixel electrode of corresponding same sweep trace changes, make the pressure reduction of the corresponding pixel electrode of each sweep trace and the corresponding common electric potential of each sweep trace be consistent, thereby solved the brightness of the picture element row that are numbered odd number and the inconsistent problem of brightness of the picture element row that are numbered even number.Even and situation shown in Figure 4 has taken place common electric potential, because the pressure reduction of the corresponding pixel electrode of each sweep trace and the corresponding common electric potential of each sweep trace still is consistent, therefore also solved the problem of whole display panel generation brightness irregularities.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
[description of drawings]
The signal sequential that Fig. 1 adopts for existing Driving technique and the synoptic diagram of common electric potential sequential.
Fig. 2 illustrates the picture element equivalent electrical circuit of existing display panel.
Fig. 3 is numbered the inconsistent problem of brightness of the picture element brightness that is listed as and the picture element row that are numbered even number of odd number in order to explanation.
Fig. 4 is in order to illustrate the problem of whole display panel generation brightness irregularities.
Fig. 5 illustrates the picture element equivalent electrical circuit of display panel of the present invention.
Fig. 6 is the key diagram according to the driving method of the display panel of one embodiment of the invention.
Fig. 7 illustrates the relation of the voltage of each common electric potential corresponding arbitrary pixel electrode with it.
Fig. 8 is the synoptic diagram of the picture element framework of a display panel.
Fig. 9 is the key diagram according to the driving method of the display panel of another embodiment of the present invention.
Figure 10 is the process flow diagram according to the driving method of the display panel of one embodiment of the invention.
Figure 11 is the synoptic diagram of a display device.
[primary clustering symbol description]
202,502, Row[m-1], Row[m], Row[m+1]: sweep trace
204,504,811～816,1114: data line
206,506,802,1112: picture element
208,508: thin film transistor (TFT)
210,510: storage capacitors
212: picture element electric capacity
302～308: waveform
1102: time schedule controller
1104: data driver
1106: scanner driver
1108: the common electric potential supply circuit
1110: display panel
1116: sweep trace
1118, Vcom_Cst, Ccom_Clc, Vcom_Cst[m]: common electrode
Row[1], Row[2], Row[3], Row[4], Row[5], Row[6], Row[7], Row[8]: signal
S1002, S1004: step
Vcom, Vcom_Cst[1], Vcom_Cst[2], Vcom_Cst[3], Vcom_Cst[4], Vcom_Cst[5], Vcom_Cst[6], Vcom_Cst[7], Vcom_Cst[8], Vcom_Cst[479], Vcom_Cst[480]: common electric potential
Vpixel[1], Vpixel[2], Vpixel[3], Vpixel[4], Vpixel[479], Vpixel[480]: the voltage of pixel electrode
[embodiment]
Display panel of the present invention is described first.In the infrabasal plate of display panel of the present invention, be provided with a plurality of common electrodes, and the same community electrode of picture element electric property coupling of same sweep trace institute electric property coupling.Any common electrode then is not set in the upper substrate of this display panel.Therefore, the picture element equivalent electrical circuit of this display panel can be represented by Fig. 5.
Fig. 5 has namely illustrated described picture element equivalent electrical circuit.Please refer to Fig. 5, picture element 506 mainly is made up of thin film transistor (TFT) 508 and storage capacitors 510.The grid electric property coupling one scan line 502 of thin film transistor (TFT) 508, and a wherein source of thin film transistor (TFT) 508/drain electrode electric property coupling one data line 504.The wherein wherein community electrode Vcom_Cst of an end electric property coupling infrabasal plate of storage capacitors 510.In addition, thin film transistor (TFT) 208 is so-called pixel electrode with storage capacitors 210 phase electric property coupling places.Next will introduce the driving method of this display panel.
First embodiment:
In this routine display panel, all picture elements adopt traditional electric property coupling mode, and just the picture element of K bar sweep trace institute electric property coupling is positioned at same row, and wherein K is natural number.
Fig. 6 is the key diagram according to the driving method of the display panel of one embodiment of the invention.In Fig. 6, indicate Row[1], Row[3] and Row[5] the first row picture element represented respectively, the 3rd row picture element and the corresponding signal of the 5th row picture element, indicate Row[2], Row[4] and Row[6] the secondary series picture element represented respectively, the 4th row picture element and the corresponding signal of the 6th row picture element, indicate Vcom_Cst[1], Vcom_Cst[3] and Vcom_Cst[5] the first row picture element represented respectively, the 3rd row picture element and the corresponding common electric potential of the 5th row picture element, and indicate Vcom_Cst[2], Vcom_Cst[4] and Vcom_Cst[6] the secondary series picture element represented respectively, the 4th row picture element and the corresponding common electric potential of the 6th row picture element.
As shown in Figure 6, this driving method drives earlier the sweep trace of first group in regular turn, and then drives the sweep trace of second group in regular turn.In this example, the sweep trace of first group is numbered the sweep trace of odd number, just odd number bar sweep trace; And the sweep trace of second group is numbered the sweep trace of even number, just even number bar sweep trace.And by Fig. 6 also as can be known, these common electric potential all have two position standards (being high levels and low level), and the sequential of these common electric potential is neither together.In addition, before the picture element that desire is opened was opened, the position standard of the corresponding common electric potential of these picture elements will be done switching earlier.
In the N picture, when driving the sweep trace of first group, the corresponding common electric potential of the picture element that is unlocked presents high levels, and data driver (not illustrating) provides the data line of negative polarity data-signal to the display panel, so that have negative polarity corresponding to the picture element of first group's sweep trace; And in the N picture, when driving the sweep trace of second group, the corresponding common electric potential of the picture element that is unlocked presents low level, and data driver provides the data line of positive polarity data-signal to the display panel, so that have positive polarity corresponding to the picture element of second group's sweep trace.Certainly, positive polarity is opposite with the polarity of negative polarity.
Similarly, in the N+1 picture, when driving the sweep trace of first group, the corresponding common electric potential of the picture element that is unlocked presents low level, and data driver provides the data line of positive polarity data-signal to the display panel, so that have positive polarity corresponding to the picture element of first group's sweep trace; And in the N+1 picture, when driving the sweep trace of second group, the corresponding common electric potential of the picture element that is unlocked presents high levels, and data driver provides the data line of negative polarity data-signal to the display panel, so that have negative polarity corresponding to the picture element of second group's sweep trace.Suppose that this routine display panel has 480 common electrodes, the relation of the voltage of each common electric potential corresponding arbitrary pixel electrode with it can be represented by Fig. 7 so.In Fig. 7, indicate Vcom_Cst[1], Vcom_Cst[3] and Vcom_Cst[479] represent the first row picture element, the 3rd row picture element and the corresponding common electric potential of the 479 row picture element respectively, and sign Vcom_Cst[2], Vcom_Cst[4] and Vcom_Cst[480] represent secondary series picture element, the 4th row picture element and the corresponding common electric potential of the 400 eighty-column picture element respectively.As for indicating Vpixel[1], Vpixel[3] and Vpixel[479] represent the voltage of voltage and arbitrary pixel electrode of the 479 row picture element of arbitrary pixel electrode of voltage, the 3rd row picture element of arbitrary pixel electrode of the first row picture element respectively, and sign Vpixel[2], Vpixel[4] and Vpixel[480] represent the voltage of arbitrary pixel electrode of the voltage of arbitrary pixel electrode of voltage, the 4th row picture element of arbitrary pixel electrode of secondary series picture element and the 400 eighty-column picture element respectively.
As shown in Figure 7, owing to the variation along with same common electric potential of the voltage of the pixel electrode of same picture element row changes, make the pressure reduction of the corresponding pixel electrode of each sweep trace and the corresponding common electric potential of each sweep trace be consistent, thereby solved the brightness of the picture element row that are numbered odd number and the inconsistent problem of brightness of the picture element row that are numbered even number.Even and situation shown in Figure 4 has taken place common electric potential, because the pressure reduction of the corresponding pixel electrode of each sweep trace and the corresponding common electric potential of each sweep trace still is consistent, therefore also solved the problem of whole display panel generation brightness irregularities.
Second embodiment:
This embodiment mainly is that key diagram 6 described driving methods also can be applicable on the different picture element frameworks, illustrates with Fig. 8.Fig. 8 is the synoptic diagram of the picture element framework of a display panel.In Fig. 8, indicate 802 and be expressed as picture element, indicate 811～816 and be expressed as data line, indicate Row[m-1], Row[m] and Row[m+1] be expressed as sweep trace, wherein m is natural number, and indicates Vcom_Cst[m] be expressed as corresponding to sweep trace Row[m] common electrode.As shown in Figure 6, the picture element of this display panel comes the electric property coupling sweep trace in the mode of zigzag (zigzag), thereby makes same sweep trace two the adjacent picture elements of taking up an official post be positioned at different lines.
Under this picture element framework, implement driving method shown in Figure 6, can make this display panel reach an effect of counter-rotating (dotinversion).So, just, can utilize this effect to make the vision equalization and further improve the brightness of the picture element row that are numbered odd number and the inconsistent problem of brightness of the picture element row that are numbered even number again.
The 3rd embodiment:
This embodiment mainly is that the sweep trace of the described display panel of explanation first embodiment also can be to be divided into more group to drive, and makes an explanation with Fig. 9.
Fig. 9 is the key diagram according to the driving method of the display panel of another embodiment of the present invention.In Fig. 9, indicate Row[1], Row[3], Row[5] and Row[7] the first row picture element represented respectively, the 3rd row picture element, the 5th row picture element and the corresponding signal of the 7th row picture element, indicate Row[2], Row[4], Row[6] and Row[8] the secondary series picture element represented respectively, the 4th row picture element, the 6th row picture element and corresponding signal, indicate Vcom_Cst[1], Vcom_Cst[3], Vcom_Cst[5] and Vcom_Cst[7] the first row picture element represented respectively, the 3rd row picture element, the 5th row picture element and the corresponding common electric potential of the 7th row picture element, and indicate Vcom_Cst[2], Vcom_Cst[4], Vcom_Cst[6] and Vcom_Cst[8] the secondary series picture element represented respectively, the 4th row picture element, the 6th row picture element and the corresponding common electric potential of the 8th row picture element.
As shown in Figure 9, in this driving method, the sweep trace that is numbered odd number is divided into a plurality of groups in regular turn, and the sweep trace that will be numbered even number is divided into a plurality of groups in regular turn, wherein each group includes 2 sweep traces.Certainly, each group includes N bar sweep trace, as long as N is natural number.Then, drive sweep trace in the group in regular turn in the mode of each group, and the numbering of the sweep trace on the time in the wherein group of two adjacent groups is all odd number, and the numbering of the sweep trace in another group is all even number, and drive when being numbered the sweep trace of odd number, the corresponding common electric potential of the picture element that is unlocked presents wherein standard, and drives when being numbered the sweep trace of even number, and the corresponding common electric potential of the picture element that is unlocked presents the another one standard.
In the N picture, when driving is numbered the sweep trace of odd number, the corresponding common electric potential of the picture element that is unlocked presents high levels, and data driver (not illustrating) provides the data line of negative polarity data-signal to the display panel, so that have negative polarity corresponding to the picture element of these sweep traces; And in the N picture, when driving is numbered the sweep trace of even number, the corresponding common electric potential of the picture element that is unlocked presents low level, and data driver provides the data line of positive polarity data-signal to the display panel, so that have positive polarity corresponding to the picture element of these sweep traces.Certainly, positive polarity is opposite with the polarity of negative polarity.
Similarly, in the N+1 picture, when driving was numbered the sweep trace of odd number, the corresponding common electric potential of the picture element that is unlocked presented low level, and data driver provides the data line of positive polarity data-signal to the display panel, so that have positive polarity corresponding to the picture element of these sweep traces; And in the N+1 picture, when driving be numbered even number sweep trace the time, the corresponding common electric potential of the picture element that is unlocked presents high levels, and data driver provides the data line of negative polarity data-signal to the display panel, so that have negative polarity corresponding to the picture element of these sweep traces.
Thus and since the voltage of online data every sweep time of N bar sweep trace will transition once, therefore can further improve the brightness of the picture element row that are numbered odd number and the inconsistent problem of brightness of the picture element row that are numbered even number again.
In addition, only pipe is in this example, and the sweep trace in each group drives by set order, yet the deviser also can change the driving order of the sweep trace in each group.Be example with Fig. 9, can drive the 3rd sweep trace earlier, and then drive article one sweep trace.Then, drive the 4th sweep trace earlier, and then drive the second sweep trace.Certainly, the sequential of the corresponding common electric potential of each sweep trace also will change.
By the teaching of the various embodiments described above, can summarize some basic steps of driving method of the present invention, one as shown in figure 10.Figure 10 is the process flow diagram according to the driving method of the display panel of one embodiment of the invention.Described display panel has a plurality of picture elements, many data lines, multi-strip scanning line and a plurality of common electrodes, above-mentioned picture element is arranged in a matrix, above-mentioned data line and the above-mentioned picture element of above-mentioned sweep trace electric property coupling, and above-mentioned common electrode all is arranged in the infrabasal plate of display panel.This driving method includes the following step: provide the different common electric potential of a plurality of sequential to above-mentioned common electrode, wherein each common electric potential has first standard and second standard (shown in step S1002); And in during a picture shows, provide the different signal of a plurality of sequential to above-mentioned sweep trace, in order to opening above-mentioned picture element, and before above-mentioned picture element is opened, just switch the position accurate (shown in step S1004) that desire is opened the corresponding common electric potential of picture element earlier.
Similarly, if there is a display device to adopt driving method of the present invention to drive its display panel, so by the teaching of the various embodiments described above, also can summarize some basic operation behaviors of the internal control circuit of this display device.This will illustrate with Figure 11.Please refer to Figure 11, it is the synoptic diagram of a display device.This display device includes time schedule controller 1102, data driver 1104, scanner driver 1106, common electric potential supply circuit 1108 and display panel 1110.Display panel 1110 has a plurality of picture elements (as indicating shown in 1112), many data lines (as indicating shown in 1114), multi-strip scanning line (as indicating shown in 1116) and a plurality of common electrodes (as indicating shown in 1118).Above-mentioned picture element is arranged in a matrix, above-mentioned data line and the above-mentioned picture element of above-mentioned sweep trace electric property coupling, and above-mentioned common electrode all is arranged in the infrabasal plate (not illustrating) of display panel 1110.The above-mentioned data line of data driver 1104 electric property couplings, and the above-mentioned sweep trace of scanner driver 1106 electric property couplings.
Time schedule controller 1102 electric property coupling data drivers 1104 and scanner drivers 1106, and in order in during a picture shows, gated sweep driver 1106 provides the different signal of a plurality of sequential to above-mentioned sweep trace, in order to open above-mentioned picture element.And this time schedule controller 1102 also sees through above-mentioned data line the demonstration data of correspondence is loaded the picture element that is unlocked in order to control data driver 1104.As for common electric potential supply circuit 1108, it is in order to provide the different common electric potential of a plurality of sequential to above-mentioned common electrode, and wherein each common electric potential has first standard and second standard.And before picture element was opened, just the position of the corresponding common electric potential of switching desire unlatching picture element was accurate earlier for common electric potential supply circuit 1108.What deserves to be mentioned is that common electric potential supply circuit 1108 can be to decide the position that when will switch common electric potential accurate with reference to the signal that time schedule controller 1102 sends scanner driver 1106 to.
Certainly, time schedule controller 1102 also can be the same according to the described mode of the 3rd embodiment, and the sweep trace that is numbered odd number is divided into a plurality of groups in regular turn, and the sweep trace that will be numbered even number is divided into a plurality of groups in regular turn, wherein each group includes N bar sweep trace, and N is natural number.Time schedule controller 1102 just can gated sweep driver 1106 drives sweep trace in the group in regular turn in the mode of each group then, wherein the numbering of the sweep trace in the wherein group of two adjacent groups is all odd number on the time, and the numbering of the sweep trace in another group is all even number.And when scanner driver 1106 drivings are numbered the sweep trace of odd number, the corresponding common electric potential of the picture element that is unlocked just presents first standard, and when scanner driver 1106 drivings were numbered the sweep trace of even number, the corresponding common electric potential of the picture element that is unlocked just presented second standard.
In sum, the present invention solves the means of foregoing problems, be a plurality of common electrodes are set in the infrabasal plate of display panel, and the same community electrode of picture element electric property coupling of same sweep trace institute electric property coupling.Any common electrode then is not set in the upper substrate of display panel.Then, provide the different common electric potential of a plurality of sequential to above-mentioned common electrode, and before picture element is opened, open the position standard of the corresponding common electric potential of picture element with regard to switching desire earlier.Owing to the variation along with same common electric potential of the voltage of the pixel electrode of corresponding same sweep trace changes, make the pressure reduction of the corresponding pixel electrode of each sweep trace and the corresponding common electric potential of each sweep trace be consistent, thereby solved the brightness of the picture element row that are numbered odd number and the inconsistent problem of brightness of the picture element row that are numbered even number.Even and situation shown in Figure 4 has taken place common electric potential, because the pressure reduction of the corresponding pixel electrode of each sweep trace and the corresponding common electric potential of each sweep trace still is consistent, therefore also solved the problem of whole display panel generation brightness irregularities.
Though the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (13)
1. the driving method of a display panel, described display panel has a plurality of picture elements, many data lines, multi-strip scanning line and a plurality of common electrodes, described picture element is arranged in a matrix, described data line and the described picture element of described sweep trace electric property coupling, described common electrode all is arranged in the infrabasal plate of this display panel, and this driving method comprises:
Provide the different common electric potential of a plurality of sequential to described common electrode, wherein each common electric potential has one first standard and one second standard; And
During a picture shows, provide the different signal of a plurality of sequential to described sweep trace, in order to opening described picture element, and before described picture element is opened, just switching desire earlier, to open the position of the corresponding common electric potential of picture element accurate.
2. the driving method of display panel according to claim 1, it is characterized in that, drive earlier the sweep trace of one first group in regular turn, and then drive the sweep trace of one second group in regular turn, and when driving the sweep trace of this first group, the corresponding common electric potential of the picture element that is unlocked presents this first standard, and when driving the sweep trace of this second group, the corresponding common electric potential of the picture element that is unlocked presents this second standard, wherein, this first group sweep trace is odd number bar sweep trace, and this second group sweep trace is even number bar sweep trace.
3. the driving method of display panel according to claim 2, it is characterized in that, this driving method more comprises, provide one first polarity data signal to described data line so that have one first polarity corresponding to the described picture element of first group's sweep trace, provide one second polarity data signal to described data line so that have one second polarity corresponding to the described picture element of second group's sweep trace.
4. the driving method of display panel according to claim 3 is characterized in that, this first polarity is opposite with the polarity of this second polarity.
5. the driving method of display panel according to claim 1 is characterized in that, it more comprises:
The sweep trace that is numbered odd number is divided into a plurality of groups in regular turn, and the sweep trace that will be numbered even number is divided into a plurality of groups in regular turn, wherein each group includes N bar sweep trace, and N is natural number; And
Drive sweep trace in the group in regular turn in the mode of each group, and the numbering of the sweep trace on the time in the wherein group of two adjacent groups is all odd number, and the numbering of the sweep trace in another group is all even number, and drive when being numbered the sweep trace of odd number, the corresponding common electric potential of the picture element that is unlocked presents this first standard, and drive when being numbered the sweep trace of even number, the corresponding common electric potential of the picture element that is unlocked presents this second standard.
6. the driving method of display panel according to claim 5, it is characterized in that, this driving method more comprises, provide one first polarity data signal to described data line so that have one first polarity corresponding to the described picture element of odd-numbered scan lines, provide one second polarity data signal to described data line so that have one second polarity corresponding to the described picture element of even-line interlace line, wherein, this first polarity is opposite with the polarity of this second polarity.
7. display device comprises:
One display panel has a plurality of picture elements, multi-strip scanning line, many data lines and a plurality of common electrode, and described picture element is arranged in a matrix, described data line and the described picture element of described sweep trace electric property coupling;
One data driver, the described data line of electric property coupling;
The one scan driver, the described sweep trace of electric property coupling;
Time schedule controller, in during a picture shows, controlling this scanner driver provides the different signal of a plurality of sequential to described sweep trace, in order to opening described picture element, this time schedule controller also sees through described data line the demonstration data of correspondence is loaded the picture element that is unlocked in order to control this data driver; And
One common electric potential supply circuit, in order to provide the different common electric potential of a plurality of sequential to described common electrode, wherein each common electric potential has one first standard and one second standard, and before described picture element was opened, just the position of the corresponding common electric potential of switching desire unlatching picture element was accurate earlier for this common electric potential supply circuit.
8. display device according to claim 7, it is characterized in that, this time schedule controller is controlled the sweep trace that this scanner driver drives earlier one first group in regular turn, and then drive the sweep trace of one second group in regular turn, and when scanner driver drives the sweep trace of this first group, the corresponding common electric potential of the picture element that is unlocked presents this first standard, and when scanner driver drives the sweep trace of this second group, the corresponding common electric potential of the picture element that is unlocked presents this second standard, wherein, this first group sweep trace is odd number bar sweep trace, and this second group sweep trace is even number bar sweep trace.
9. display device according to claim 8, it is characterized in that, this data driver provides one first polarity data signal to described data line so that have one first polarity corresponding to the described picture element of first group's sweep trace, and provides one second polarity data signal to described data line so that have one second polarity corresponding to the described picture element of second group's sweep trace.
10. display device according to claim 9 is characterized in that, this first polarity is opposite with the polarity of this second polarity.
11. display device according to claim 7, it is characterized in that, the sweep trace that this time schedule controller will be numbered odd number is divided into a plurality of groups in regular turn, and the sweep trace that will be numbered even number is divided into a plurality of groups in regular turn, wherein each group includes N bar sweep trace, and N is natural number, this time schedule controller is also controlled this scanner driver and is driven sweep trace in the group in regular turn in the mode of each group, wherein the numbering of the sweep trace in the wherein group of two adjacent groups is all odd number on the time, and the numbering of the sweep trace in another group is all even number, and when this scanner driver driving is numbered the sweep trace of odd number, the corresponding common electric potential of the picture element that is unlocked presents this first standard, and when the scanner driver driving was numbered the sweep trace of even number, the corresponding common electric potential of the picture element that is unlocked presented this second standard.
12. display device according to claim 11, it is characterized in that, this data driver provides one first polarity data signal to described data line so that have one first polarity corresponding to the described picture element of odd-numbered scan lines, and provide one second polarity data signal to described data line so that have one second polarity corresponding to the described picture element of even-line interlace line, wherein, this first polarity is opposite with the polarity of this second polarity.
13. display device according to claim 7 is characterized in that, described common electrode all is arranged in the infrabasal plate of this display panel.
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| TW100110826A TWI436328B (en) | 2011-03-29 | 2011-03-29 | Method for driving a display panel and display apparatus applying the same method |
| TW100110826 | 2011-03-29 |
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| TWI475551B (en) * | 2013-06-03 | 2015-03-01 | Au Optronics Corp | Driving method of display panel, display panel and gate driving circuit |
| KR102485165B1 (en) * | 2015-08-21 | 2023-01-09 | 삼성디스플레이 주식회사 | Display device and method for driving thereof |
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|---|---|---|---|---|
| CN101101423A (en) * | 2006-07-03 | 2008-01-09 | 爱普生映像元器件有限公司 | Liquid crystal device, method of driving liquid crystal device, and electronic apparatus |
| CN101231808A (en) * | 2007-01-22 | 2008-07-30 | 株式会社日立显示器 | Display device |
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| KR100590746B1 (en) * | 1998-11-06 | 2006-10-04 | 삼성전자주식회사 | Liquid crystal display with different common voltages |
| KR100752365B1 (en) * | 2003-11-14 | 2007-08-28 | 삼성에스디아이 주식회사 | Pixel driving circuit and method for display panel |
| US20050174310A1 (en) * | 2003-12-30 | 2005-08-11 | Au Optronics Corporation | Low power driving in a liquid crystal display |
| KR100800490B1 (en) * | 2007-01-26 | 2008-02-04 | 삼성전자주식회사 | Liquid crystal display device and method of driving the same |
| CN101562003B (en) * | 2009-06-03 | 2011-01-05 | 友达光电股份有限公司 | Liquid crystal display panel and drive method thereof |
| TWI426496B (en) * | 2011-03-17 | 2014-02-11 | Au Optronics Corp | Liquid crystal display device without upper substrate electrode and driving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101101423A (en) * | 2006-07-03 | 2008-01-09 | 爱普生映像元器件有限公司 | Liquid crystal device, method of driving liquid crystal device, and electronic apparatus |
| CN101231808A (en) * | 2007-01-22 | 2008-07-30 | 株式会社日立显示器 | Display device |
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| TW201239840A (en) | 2012-10-01 |
| CN102194400A (en) | 2011-09-21 |
| TWI436328B (en) | 2014-05-01 |
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