CN105261342A - Driving method and driving circuit of TFT substrate and display device thereof - Google Patents
Driving method and driving circuit of TFT substrate and display device thereof Download PDFInfo
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- CN105261342A CN105261342A CN201510790861.9A CN201510790861A CN105261342A CN 105261342 A CN105261342 A CN 105261342A CN 201510790861 A CN201510790861 A CN 201510790861A CN 105261342 A CN105261342 A CN 105261342A
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Abstract
The invention discloses a driving method and driving circuit of a TFT substrate and a display device. The driving method includes the following steps that: scanning voltage is provided for each row of pixel units sequentially, so that each row of pixel units can be pre-charged; and when an N*(2n+1)-th row of pixel units is pre-charged, scanning voltage is provided again for each row of pixel units from the first row of pixel units sequentially, so that each row of pixel units can be switched on, and pixel voltage is provided for the switched-on pixel units, wherein N is an integer greater than or equal to 1. By means of the above technical schemes of the invention, the problem of insufficient charging can be solved.
Description
Technical field
The present invention relates to display technique field, especially relate to a kind of driving method of TFT substrate, driving circuit and display device.
Background technology
At present, there is inadequate problem of general duration of charging in the panel of 4K resolution and 2K resolution.LCD (the LiquidCrystalDisplay of prior art, liquid crystal display) panel adopt scheme be: refer to shown in Fig. 1, the LCD polarity switching mode of Fig. 1 is columninversion (row reversion) formula, namely the polarity of each row is identical, and the polarity of adjacent column is contrary.When driving each pixel cell of this LCD, concrete way is: provide scanning voltage to successively the pixel cell of every a line, wherein, the time of scanning voltage is provided to be divided into two parts to the pixel cell of every a line, and when latter half, start to provide scanning voltage to the next line pixel cell of current line, and start to provide data voltage to the pixel cell of current line simultaneously, the switching tube that this data voltage can be opened by current line is transferred to corresponding pixel cell.Because the pixel cell of next line started to receive scanning voltage when latter half sweep time of current line, therefore can carry out precharge to the pixel cell of next line, thus increase the duration of charging, avoid the problem occurring that various undercharge produces.
Such as, but the polarity mode that the scheme of prior art can not meet LCD is the situation of the pixel cell in same row with opposed polarity, situation when polarity mode is 1+2line (OK).Owing to there is the opposite polarity phenomenon of adjacent pixel cell in same row, then pre-charging functions lost efficacy, and panel there will be the problem of undercharge.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of driving method of TFT substrate, driving circuit and display device.Precharge can be carried out to the display device of various polarity mode, thus solve the problem of undercharge.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the driving method providing a kind of TFT substrate, TFT substrate comprises the multiple pixel cells in arranged in matrix, wherein, the first row pixel cell is a polarity unit, from the second row pixel cell, the capable pixel cell of every n is another polarity unit, n be more than or equal to 1 integer, each pixel cell in each polarity unit is contrary with the polarity of the pixel voltage that the pixel cell of the same row in adjacent polarity unit receives, the method comprises the following steps: provide scanning voltage to successively every a line pixel cell, to carry out precharge to every a line pixel cell, when carrying out precharge to the pixel cell of N* (2n+1) row, from the first row pixel cell, there is provided scanning voltage again to successively every a line pixel cell, to open every a line pixel cell, and provide pixel voltage to the pixel cell opened simultaneously, wherein, N be more than or equal to 1 integer.
Wherein, the first row pixel cell is the first pixel cell, pixel cell from the second row pixel cell is the second pixel cell, method comprises: provide a continuous print to drive the driving clock signal of square wave, wherein, driving square wave comprises an initial driving square wave, and from initial driving square wave, each drives square wave to be corresponding in turn to the driving of a line second pixel cell; The step of scanning voltage is provided to comprise to successively every a line pixel cell: to provide scanning voltage to the second pixel cell of corresponding row successively wave period according to driving side.
Wherein, method comprises: when driving square wave to be rising edge, start to provide scanning voltage to the second pixel cell of corresponding row, and is extended to the next rising edge time driving square wave.
Wherein, method comprises: provide one to start clock signal, and beginning clock signal comprises two and starts square waves, starts the driving of corresponding first pixel cell of square wave, and wherein two time intervals starting square wave are N*2n driving square wave.
Wherein, starting the high level time of square wave is a driving side wave period; Method also comprises: when beginning square wave is rising edge, provides scanning voltage, and be extended to the next negative edge starting square wave to the first pixel cell.
For solving the problems of the technologies described above, another technical solution used in the present invention is: the driving circuit providing a kind of TFT substrate, TFT substrate comprises the multiple pixel cells in arranged in matrix, wherein, the first row pixel cell is a polarity unit, from the second row pixel cell, the capable pixel cell of every n is another polarity unit, n be more than or equal to 1 integer, each pixel cell in each polarity unit is contrary with the polarity of the pixel voltage that the pixel cell of the same row in adjacent polarity unit receives, this driving circuit comprises: multiple scanning chip, the corresponding one-row pixels unit of every one scan chip, multiple scanning chip is used for providing scanning voltage to the pixel cell of corresponding row successively, to carry out precharge to every a line pixel cell, when the scanning chip of N* (2n+1) row carries out precharge to the pixel cell of corresponding row, from the scanning chip of the first row, provide scanning voltage, to open every a line pixel cell again to successively the pixel cell of corresponding row, wherein, N be more than or equal to 1 integer, multiple data chip, the corresponding row pixel cell of each data chip, multiple data chip is used for again providing during scanning voltage to the pixel cell of corresponding row at multiple scanning chip providing pixel voltage to the pixel cell opened.
Wherein, the first row pixel cell is the first pixel cell, the scanning chip of corresponding first pixel cell is the first scanning chip, and the pixel cell from the second row pixel cell is the second pixel cell, and the scanning chip of corresponding second pixel cell is the second scanning chip; Driving circuit comprises further: drive clock-signal generator, for providing the driving clock signal of a continuous print driving square wave, wherein, driving square wave comprises an initial driving square wave, from initial driving square wave, each drives square wave to be corresponding in turn to the driving of a line second pixel cell; Each second scanning chip provides scanning voltage to successively the second pixel cell of corresponding row according to driving side respectively wave period.
Wherein, driving circuit also comprises: start clock-signal generator, for providing one to start clock signal, starting clock signal and comprising two beginning square waves, start the driving of corresponding first pixel cell of square wave, wherein two time intervals starting square wave are N*2n driving square wave.
Wherein, the second scanning chip, when driving square wave to be rising edge, starts to provide scanning voltage to the second pixel cell of corresponding row, and is extended to the next rising edge time driving square wave; Starting the high level time of square wave is a driving side wave period; First scanning chip, when beginning square wave is rising edge, provides scanning voltage to the first pixel cell, and is extended to the next negative edge starting square wave.
For solving the problems of the technologies described above, another technical scheme that the present invention adopts is: provide a kind of display device, this display device comprises the driving circuit of TFT substrate as previously described.
The invention has the beneficial effects as follows: the situation being different from prior art, TFT substrate of the present invention comprises the multiple pixel cells in arranged in matrix, wherein, the first row pixel cell is a polarity unit, from the second row pixel cell, the capable pixel cell of every n is another polarity unit, n be more than or equal to 1 integer, each pixel cell in each polarity unit is contrary with the polarity of the pixel voltage that the pixel cell of the same row in adjacent polarity unit receives.The present invention is based on the driving method that above-mentioned structure provides a kind of TFT substrate, the method is specially: provide scanning voltage to successively every a line pixel cell, to carry out precharge to every a line pixel cell, and when carrying out precharge to the pixel cell of N* (2n+1) row, from the first row pixel cell, there is provided scanning voltage again to successively every a line pixel cell, to open every a line pixel cell, and provide pixel voltage to the pixel cell opened simultaneously, wherein, N be more than or equal to 1 integer.Therefore, the present invention can carry out precharge to another row pixel cell identical with the pixel voltage of this row pixel cell while providing pixel voltage to the pixel cell of a line, thus solves the problem of undercharge.
Accompanying drawing explanation
Fig. 1 is the structural representation of the TFT substrate of prior art;
Fig. 2 is the structural representation of a kind of TFT substrate that the embodiment of the present invention provides;
Fig. 3 is the process flow diagram of the driving method of a kind of TFT substrate that the embodiment of the present invention provides;
Fig. 4 is a kind of oscillogram of each signal that the embodiment of the present invention provides;
Fig. 5 is the structural representation of the another kind of TFT substrate that the embodiment of the present invention provides;
Fig. 6 is the another kind of oscillogram of each signal that the embodiment of the present invention provides;
Fig. 7 is the structural representation of the driving circuit of a kind of TFT substrate that the embodiment of the present invention provides;
Fig. 8 is the structural representation of a kind of display device that the embodiment of the present invention provides.
Embodiment
See also the structural representation that Fig. 2-4, Fig. 2 is a kind of TFT substrate that the embodiment of the present invention provides; Fig. 3 is the process flow diagram of the driving method of a kind of TFT substrate that the embodiment of the present invention provides; Fig. 4 is the oscillogram of each signal.Wherein, the driving method of the present embodiment is situation when being 1+nline (OK) based on the polarity mode of the pixel cell of TFT substrate, wherein n be more than or equal to 1 integer.Specifically, be exactly the first row pixel cell be a polarity unit, from the second row pixel cell, the capable pixel cell of every n is another polarity unit, and each pixel cell in each polarity unit is contrary with the polarity of the pixel voltage that the pixel cell of the same row in adjacent polarity unit receives.
Wherein, as shown in Figure 3, the TFT substrate shown in Fig. 3 comprises the multiple pixel cells 101 in arranged in matrix to the TFT substrate structure when n is 2.Wherein, the first row pixel cell 101 is a polarity unit 102, from the second row pixel cell 101, every 2 row pixel cells 101 are another polarity unit, such as, the pixel cell 101 of the second row and the third line is polarity unit 103, and the pixel cell 101 of fourth line and fifth line is polarity unit 104.Each pixel cell 101 in each polarity unit is contrary with the polarity of the pixel voltage that the pixel cell 101 of the same row in adjacent polarity unit receives, such as, each pixel cell 101 in polarity unit 102 is contrary with the polarity of the pixel voltage that the pixel cell 101 of the same row in polarity unit 103 receives.The polarity of the pixel voltage that the pixel cell 101 of the same row in the polarity unit 104 that each pixel cell 101 in polarity unit 103 is adjacent with opposite side further receives is contrary.
Should be understood that in the present embodiment, when n is more than or equal to 2, in same polarity unit, the polarity of the pixel voltage that the pixel cell 101 of same row receives is identical.
What more than introduce is the change of the polarity of the pixel voltage that pixel cell 101 on column direction receives, the change in polarity of the pixel voltage received in pixel cell 101 in the row direction also can change as previously described on column direction similar, as shown in Figure 2.In other embodiments, the polarity that can also be set to the pixel voltage received by pixel cell 101 of every a line is all identical, and namely only pixel cell 101 in a column direction does the change of pixel voltage.
The present embodiment is just based on the structure of the pixel cell of previously described TFT substrate and the driving method designed.Specifically comprise the following steps:
Step S1: provide scanning voltage, to carry out precharge to every a line pixel cell 101 to successively every a line pixel cell 101.
Step S2: when carrying out precharge to the pixel cell 101 of N* (2n+1) row, from the first row pixel cell 101, there is provided scanning voltage again to successively every a line pixel cell 101, to open every a line pixel cell 101, and provide pixel voltage to the pixel cell 101 opened simultaneously, wherein, N be more than or equal to 1 integer.
In this enforcement, the value of citing N is 1 to be introduced.
When N is 1, n by when being 2 described in above, this step, when carrying out precharge to the pixel cell 101 of the 5th row, from the first row pixel cell 101, provides scanning voltage again to successively every a line pixel cell 101.
That is, provide scanning voltage successively first to the first row pixel cell 101 to the 4 row pixel cell 101, make it carry out precharge.When providing scanning voltage to the pixel cell 101 of the 5th row, providing scanning voltage again to every a line pixel cell 101, corresponding pixel voltage is provided simultaneously.When providing scanning voltage to the pixel cell 101 of the 6th row, provide scanning voltage again to every 2 row pixel cells 101.Realize the precharge of pixel cell thus.
In the present embodiment, definition the first row pixel cell 101 is the first pixel cell 105 further, and the pixel cell 101 from the second row pixel cell is the second pixel cell 106.That is, the pixel cell 101 being positioned at the first row is the first pixel cell 105, and the pixel cell of other row except the pixel cell of the first row is the second pixel cell 106.
Wherein, the driving method of the present embodiment also comprises: provide one to comprise driving clock signal CKV that continuous print drives square wave C0, wherein, driving square wave C0 comprises an initial driving square wave C1, from initial driving square wave C1, each drives square wave C0 to be corresponding in turn to the driving of a line second pixel cell 106.
Therefore, step S1 is specially according to driving the cycle of square wave C0 to provide scanning voltage to the second pixel cell 106 of corresponding row successively.Being specially, when driving square wave C0 to be rising edge, starting to provide scanning voltage to the second pixel cell 106 of corresponding row, and be extended to the next rising edge time driving square wave.The 2nd row is as shown in Figure 4 to output waveform OUT2 to the OUT5 of the second pixel cell 106 of the 5th row.
Further, the present embodiment also provides one to start clock signal STV, starts clock signal STV and comprises two beginning square wave S1 and S2.Wherein, start square wave S1 and S2 corresponding be the driving of the first pixel cell 105.Wherein two time intervals starting square wave S1 and S2 are N*2n driving square wave, and the present embodiment is 4 and drives square waves.Further, the high level time TH starting square wave S1 and S2 is a cycle T 1 driving square wave C0.
Therefore, step S2 is specially when beginning square wave S1 and S2 is rising edge, provides scanning voltage, and be extended to the next negative edge starting square wave to the first pixel cell 105.Driving in conjunction with described the first row pixel cell 105 is above known, when beginning square wave S1 is rising edge, provide scanning voltage to the first pixel cell 105, to carry out precharge to the first pixel cell 105, when beginning square wave S2 is rising edge, again provide scanning voltage to the first pixel cell 105.
In the present embodiment, start the previous driving square wave of driving square wave C1 corresponding to square wave S1.
In the present embodiment, carry out the time of precharge to each pixel cell and provide the time of pixel voltage to be identical.In other embodiments, can also arrange difference according to the display situation of the upset of liquid crystal molecule or pixel, what time of such as precharge was less than pixel voltage provides the time.
Described in brought forward, the present embodiment solves the pixel cell of the TFT substrate of 1+2line cannot the problem of precharge.
The previously described n of being equals 2 and the N situation that equals 1, should be understood that also to be suitable for when n and N gets other values.Situation such as shown in Fig. 5 and Fig. 6, now, n value 1, N value 1.As shown in Figure 5, the pixel cell of every a line is a polarity unit, as 501-505.And the change of the polarity of the pixel voltage received by the pixel cell in polarity unit is identical with previously described, does not repeat them here.As shown in Figure 6, when N is 1 and n is also 1, provide scanning voltage to first successively the pixel cell of every a line, carry out precharge, and providing scanning voltage to the 3rd row pixel cell, during to carry out precharge, provide scanning voltage again to the first row pixel cell, and corresponding pixel voltage is provided simultaneously, there is provided scanning voltage to the 4th row pixel cell, during to carry out precharge, provide scanning voltage again to the 2nd row pixel cell, and corresponding pixel voltage is provided simultaneously, the like.
Wherein, when the value of N gets 2, each waveform as shown in Figure 4.
The present embodiment additionally provides a kind of driving circuit of TFT substrate, and this driving circuit is applied in previously described driving method.Specifically refer to shown in Fig. 7.The pixel cell of the TFT substrate shown in Fig. 7 is previously described pixel cell, namely TFT substrate comprises the multiple pixel cells 101 in arranged in matrix, wherein, the first row pixel cell 101 is a polarity unit, from the second row pixel cell, every n is capable, and pixel cell 101 is another polarity unit, n be more than or equal to 1 integer, each pixel cell 101 in each polarity unit is contrary with the polarity of the pixel voltage that the pixel cell 101 of the same row in adjacent polarity unit receives.In the present embodiment, n is 2, therefore, the first row pixel cell 101 is a polarity unit 102, from the second row pixel cell 101, every 2 row pixel cells 101 are another polarity unit, such as, the pixel cell 101 of the second row and the third line is polarity unit 103, and the pixel cell 101 of fourth line and fifth line is polarity unit 104.N can also get other values in other embodiments, as mentioned before, does not repeat them here.
Driving circuit 70 shown in Fig. 7 comprises multiple scanning chip 21 and multiple data chip 30.Wherein, the corresponding one-row pixels unit 101 of every one scan chip 21, multiple scanning chip 21 provides scanning voltage, to carry out precharge to every a line pixel cell 101 for giving the pixel cell 101 of corresponding row successively.When the scanning chip 21 of N* (2n+1) row carries out precharge to the pixel cell 101 of corresponding row, from the scanning chip 21 of the first row, there is provided scanning voltage again to successively the pixel cell 101 of corresponding row, to open every a line pixel cell 101, wherein, N be more than or equal to 1 integer.
The corresponding row pixel cell 101 of each data chip 30, multiple data chip 30 provides pixel voltage for providing during scanning voltage again to the pixel cell 101 of corresponding row at multiple scanning chip 21 to the pixel cell 101 opened.
As mentioned before, the first row pixel cell 101 is the first pixel cell 105, and the pixel cell 101 from the second row pixel cell 101 is the second pixel cell 106.In the present embodiment, the scanning chip of corresponding first pixel cell 105 is the first scanning chip 22, and the scanning chip of corresponding second pixel cell 106 is the second scanning chip 23.Concrete introduction as mentioned before, does not repeat them here.
The driving circuit 70 of the present embodiment comprises driving clock-signal generator 40 further.Drive clock-signal generator 40 to drive the driving clock signal of square wave for providing one to comprise continuous print, this driving square-wave signal drives square-wave signal SKV as previously described.Concrete, driving square wave comprises an initial driving square wave, and from initial driving square wave, each drives square wave to be corresponding in turn to the driving of a line second pixel cell.
Each second scanning chip 23 provides described scanning voltage to successively the second pixel cell of corresponding row according to driving side respectively wave period.Concrete, the second scanning chip 23, when driving square wave to be rising edge, starts to provide scanning voltage to the second pixel cell of corresponding row, and is extended to the next rising edge time driving square wave.Concrete driving as mentioned before, does not repeat them here.
Further, driving circuit 70 also comprises beginning clock-signal generator 50.Start clock-signal generator 50 and start clock signal for providing one, this starts clock signal is previously described beginning clock signal STV.Concrete, beginning clock signal comprises two and starts square waves, starts the driving of corresponding first pixel cell of square wave, and wherein two time intervals starting square wave are N*2n driving square wave.Concrete, the high level time starting square wave is drivings a side wave period, and the first scanning chip, when beginning square wave is rising edge, provides scanning voltage to the first pixel cell, and is extended to the next negative edge of beginning square wave.Concrete driving as mentioned before, does not repeat them here.
Refer to Fig. 8, present invention also offers a kind of display device 80, display device 80 comprises TFT substrate 81, color membrane substrates 82 and the liquid crystal molecule between TFT substrate 81 and color membrane substrates 82 800.Further, display device 80 comprises the driving circuit 83 for the pixel cell of drive TFT substrate 81, and wherein driving circuit 83 is previously described driving circuit 70.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. the driving method of a TFT substrate, described TFT substrate comprises the multiple pixel cells in arranged in matrix, wherein, the first row pixel cell is a polarity unit, and from the second row pixel cell, the capable pixel cell of every n is another polarity unit, n be more than or equal to 1 integer, each pixel cell in each polarity unit is contrary with the polarity of the pixel voltage that the pixel cell of the same row in adjacent polarity unit receives, and it is characterized in that, said method comprising the steps of:
There is provided scanning voltage, to carry out precharge to every a line pixel cell to successively every a line pixel cell;
When carrying out precharge to the pixel cell of N* (2n+1) row, from the first row pixel cell, there is provided scanning voltage again to successively every a line pixel cell, to open every a line pixel cell, and provide pixel voltage to the pixel cell opened simultaneously, wherein, N be more than or equal to 1 integer.
2. driving method according to claim 1, is characterized in that, described the first row pixel cell is the first pixel cell, and the pixel cell from the second row pixel cell is the second pixel cell, and described method comprises:
There is provided one to comprise continuous print and drive the driving clock signal of square wave, wherein, described driving square wave comprises an initial driving square wave, and from described initial driving square wave, each drives square wave to be corresponding in turn to the driving of a line second pixel cell;
Described successively give every a line pixel cell provide the step of scanning voltage to comprise:
There is provided described scanning voltage to successively wave period described second pixel cell of corresponding row according to described driving side.
3. driving method according to claim 2, is characterized in that, described method comprises:
When described driving square wave is rising edge, start to provide described scanning voltage to described second pixel cell of corresponding row, and be extended to the next rising edge time driving square wave.
4. driving method according to claim 3, is characterized in that, described method comprises:
There is provided one to start clock signal, described beginning clock signal comprises two and starts square wave, the driving of corresponding first pixel cell of described beginning square wave, and wherein the time interval of two described beginning square waves is N*2n driving square wave.
5. driving method according to claim 4, is characterized in that, the high level time of described beginning square wave is a described driving side wave period;
Described method also comprises:
When described beginning square wave is rising edge, provide described scanning voltage to the first pixel cell, and be extended to the next negative edge of described beginning square wave.
6. the driving circuit of a TFT substrate, described TFT substrate comprises the multiple pixel cells in arranged in matrix, wherein, the first row pixel cell is a polarity unit, and from the second row pixel cell, the capable pixel cell of every n is another polarity unit, n be more than or equal to 1 integer, each pixel cell in each polarity unit is contrary with the polarity of the pixel voltage that the pixel cell of the same row in adjacent polarity unit receives, and it is characterized in that, described driving circuit comprises:
Multiple scanning chip, scans the corresponding one-row pixels unit of chip described in each, described multiple scanning chip is used for providing scanning voltage, to carry out precharge to every a line pixel cell to the pixel cell of corresponding row successively;
When the described scanning chip of N* (2n+1) row carries out precharge to the pixel cell of corresponding row, from the described scanning chip of the first row, there is provided scanning voltage again to successively the pixel cell of corresponding row, to open every a line pixel cell, wherein, N be more than or equal to 1 integer;
Multiple data chip, the corresponding row pixel cell of data chip described in each, described multiple data chip is used for again providing during described scanning voltage to the pixel cell of corresponding row at described multiple scanning chip providing pixel voltage to the pixel cell opened.
7. driving circuit according to claim 6, it is characterized in that, described the first row pixel cell is the first pixel cell, the scanning chip of corresponding first pixel cell is the first scanning chip, pixel cell from the second row pixel cell is the second pixel cell, and the scanning chip of corresponding second pixel cell is the second scanning chip;
Described driving circuit comprises further:
Drive clock-signal generator, comprise for providing one the driving clock signal that continuous print drives square wave, wherein, described driving square wave comprises an initial driving square wave, from described initial driving square wave, each drives square wave to be corresponding in turn to the driving of a line second pixel cell;
Described in each, the second scanning chip provides described scanning voltage to successively described second pixel cell of corresponding row according to described driving side respectively wave period.
8. driving circuit according to claim 7, is characterized in that, described driving circuit also comprises:
Start clock-signal generator, clock signal is started for providing one, described beginning clock signal comprises two and starts square wave, the driving of corresponding first pixel cell of described beginning square wave, and wherein the time interval of two described beginning square waves is N*2n driving square wave.
9. driving circuit according to claim 8, it is characterized in that, described second scanning chip, when described driving square wave is rising edge, starts to provide described scanning voltage to described second pixel cell of corresponding row, and is extended to the next rising edge time driving square wave;
The high level time of described beginning square wave is a described driving side wave period;
Described first scanning chip, when described beginning square wave is rising edge, provides described scanning voltage to the first pixel cell, and is extended to the next negative edge of described beginning square wave.
10. a display device, is characterized in that, described display device comprises the driving circuit of the TFT substrate as described in any one of claim 6-9.
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Application publication date: 20160120 |