CN102779492A - Liquid crystal display drive method and drive device - Google Patents
Liquid crystal display drive method and drive device Download PDFInfo
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- CN102779492A CN102779492A CN2011103015679A CN201110301567A CN102779492A CN 102779492 A CN102779492 A CN 102779492A CN 2011103015679 A CN2011103015679 A CN 2011103015679A CN 201110301567 A CN201110301567 A CN 201110301567A CN 102779492 A CN102779492 A CN 102779492A
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Abstract
The invention discloses a liquid crystal display drive method. The method comprises the following steps of: performing charge sharing between the pixel units of each line in the current scanning row, and averaging the voltage on the pixel unit storage capacitors of each line in the current scanning row; performing secondary charge sharing between the pixel units of the same line of the current scanning row and the next scanning row; averaging the voltage on each pixel unit storage capacitor in the current scanning row and the voltage on each pixel unit storage capacitor in the next scanning row; and charging each pixel unit in the current scanning row. Correspondingly, the invention also discloses a liquid crystal display drive device which can reduce the dynamic power consumption of a liquid crystal panel to 25% of the original power consumption.
Description
Technical field
The present invention relates to lcd technology, relate in particular to a kind of driving method and drive unit of liquid crystal display.
Background technology
Power consumption is the principal element that can electronic equipment be widely used, and the power consumption of display device is the important component part of electronic apparatus system overall power.At present, LCD (LCD, Liquid Crystal Display) is widely used in the electronic equipment, and along with application further expands, the market share is also increasing gradually.Wherein Thin Film Transistor-LCD (TFT-LCD, Thin Film Transistor Liquid Crystal Display) is the main product in the LCD.Liquid crystal panel is the vitals in the LCD, mainly comprises array base palte and color membrane substrates that box is provided with, is filled with liquid crystal layer therebetween.
Fig. 1 is for the electrical block diagram of existing array base palte, and is as shown in Figure 1, is formed with many grid lines 101 and data line 102 that intersect in length and breadth on the array base palte, encloses and forms a plurality of pixel cells 103 that matrix form is arranged.Be equipped with thin film transistor (TFT) (TFT, Thin Film Transistor) 104 in each pixel cell 103.For the TFT104 in each pixel cell 103, its function is equivalent to a switching tube.Patterns such as grid line 101, data line 102 and pixel cell 103 are referred to as conductive pattern in the prior art, and formed grid electrode insulating layer and passivation layer are referred to as insulation course in forming pattern processes such as grid line 101, data line 102 and pixel cell 103.Conductive pattern and insulation course can adopt existing technology to form.In the time will charging, can apply target voltage through 102 pairs of these row pixel cells 103 of data line then through the TFT104 conducting that this row pixel cell 103 is corresponding of the corresponding grid line 101 of this row to certain delegation's pixel cell 103.After the pixel electrode of pixel cell 103 was fully charged, even TFT104 breaks off, owing to the display voltage that is added on the liquid crystal layer can be stored on the MM CAP of each pixel cell 103, so liquid crystal layer can stably be worked.
Along with the continuous increase of liquid crystal panel size, the also corresponding increase of the load of liquid crystal panel causes power consumption significantly to rise, and therefore, the power consumption that how to reduce liquid crystal panel becomes problem demanding prompt solution.The dynamic power consumption of existing liquid crystal panel only can be reduced to 50% of original power consumption.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of driving method and drive unit of liquid crystal display, can the dynamic power consumption of liquid crystal panel be reduced to 25% of original power consumption.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of method for driving liquid crystal display, said method comprises:
Carry out electric charge in the current scan line between the pixel cell of adjacent columns and share, the voltage on the pixel cell storage capacitors of each adjacent columns in the current scan line is averaged;
Carry out secondary charges in the current scan line and in next scan line between the pixel cell of same column and share, with the voltage on each pixel cell storage capacitors in the current scan line, with next scan line in voltage on each pixel cell storage capacitors average;
Each pixel cell in the current scan line is charged.
In such scheme, carry out electric charge in the said current scan line between the pixel cell of adjacent columns and share, the voltage on the pixel cell storage capacitors of each adjacent columns in the current scan line is averaged, comprising:
The TFT that horizontal drive circuit is controlled each pixel cell in the current scan line is in closed condition;
Column drive circuit connects the pixel cell conducting in the current scan line on the adjacent columns with two adjacent on liquid crystal panel data lines;
Charging neutrality between the opposite polarity adjacent pixel unit on the current scan line, the voltage in the current scan line on each adjacent columns pixel cell storage capacitors is average.
In such scheme; Carrying out secondary charges in the said current scan line and in next scan line between the pixel cell of same column shares; Voltage on each pixel cell storage capacitors in voltage on each pixel cell storage capacitors in the current scan line and next scan line is averaged, comprising:
The TFT that horizontal drive circuit is controlled each pixel cell in TFT and next scan line of each pixel cell in the current scan line opens;
Column drive circuit breaks off two adjacent on liquid crystal panel data lines, and the pixel cell in the current scan line on the adjacent columns breaks off;
Charging neutrality between the same column pixel cell of current scan line and next scan line, with in the current scan line with next scan line in voltage on the same column pixel cell storage capacitors average again.
In such scheme, said each pixel cell in the current scan line is charged, comprising:
The TFT that horizontal drive circuit is controlled each pixel cell in the current scan line opens, and the TFT that controls each pixel cell in next scan line closes;
Column drive circuit output MM CAP driving voltage is each pixel cell charging to each pixel cell of current scan line.
In such scheme; On said horizontal drive circuit output line scan signals each grid line to the liquid crystal panel; When the line scan signals on said grid line is high level; The TFT that each pixel cell is corresponding on this grid line institute corresponding row opens, and when said line scan signals was low level, the TFT that each pixel cell is corresponding on this grid line institute corresponding row closed.
In such scheme, said column drive circuit connects each data line on the said liquid crystal panel through switches set, the corresponding said data line of said switches set;
When said column drive circuit is controlled pairing two the switches set conductings of adjacent two data lines; Said adjacent two data lines connect; When said column drive circuit was controlled pairing two switches set of adjacent two data lines and broken off, said adjacent two data lines broke off.
In such scheme, said method also comprises: each pixel cell of next scan line is carried out said electric charge is shared, secondary charges is shared the back charging, so back and forth, the charging of last column pixel cell of liquid crystal panel is accomplished on LCD.
The present invention also provides a kind of liquid crystal display drive unit, and said device comprises: horizontal drive circuit and column drive circuit, wherein,
Horizontal drive circuit and column drive circuit are used for controlling jointly and carry out electric charge between the pixel cell of current scan line adjacent columns and share, and the voltage on the pixel cell storage capacitors of each adjacent columns in the current scan line is averaged; And; And carry out secondary charges between the pixel cell of same column in the current scan line of the common control of said column drive circuit and in next scan line and share, the voltage on each pixel cell storage capacitors in the voltage on each pixel cell storage capacitors in the current scan line and next scan line is averaged;
Said column drive circuit also is used for each pixel cell in the current scan line being charged after the voltage on each pixel cell storage capacitors averages in the voltage on each pixel cell storage capacitors of current scan line and next scan line.
In such scheme; Said horizontal drive circuit; The TFT that is used for controlling current each pixel cell of scan line opens or closes, and when the TFT of each pixel cell opened in the current scan line of control, the TFT that controls each pixel cell in next scan line opened or closes;
Said column drive circuit is used for two adjacent on liquid crystal panel data lines are connected or disconnection, controls pixel cell conducting or disconnection on the adjacent columns in the current scan line.
In such scheme; Said horizontal drive circuit; Also be used to export line scan signals each grid line to the liquid crystal panel, when the line scan signals on said grid line was high level, the TFT that each pixel cell is corresponding on this grid line institute corresponding row opened; When said line scan signals was low level, the TFT that each pixel cell is corresponding on this grid line institute corresponding row closed.
In such scheme, said column drive circuit comprises switches set, and said switches set is used to connect the data line of each adjacent columns on the said liquid crystal panel, the corresponding said data line of said switches set;
When said column drive circuit is controlled pairing two the switches set conductings of adjacent two data lines; Said adjacent two data lines connect; When said column drive circuit was controlled pairing two switches set of adjacent two data lines and broken off, said adjacent two data lines broke off.
Method for driving liquid crystal display provided by the invention and device; Carry out through each pixel cell that electric charge is shared and secondary charges is shared to current scan line; Make the voltage of each pixel cell be adjusted into 1/4th of primary voltage, afterwards, each pixel cell to current scan line charges again; The dynamic loss of liquid crystal panel has reduced by 75% with respect to original power consumption when so, making charging.
Description of drawings
Fig. 1 is the electrical block diagram of existing array base palte;
Fig. 2 is the realization flow figure of liquid crystal display driving method of the present invention;
Fig. 3 is the composition structural representation of LCD driving mechanism in the embodiment of the invention one;
Fig. 4 by horizontal drive circuit in the embodiment of the invention one the sequential chart of generation line scan signals;
Fig. 5 by column drive circuit in the embodiment of the invention one the sequential chart of generation row control signal;
Fig. 6 is the annexation synoptic diagram of horizontal drive circuit, column drive circuit and liquid crystal panel in the embodiment of the invention one;
Fig. 7 is at the last polarity synoptic diagram that finishes each pixel cell on the liquid crystal panel of back that once drives in the embodiment of the invention one;
Fig. 8 is R on the liquid crystal panel in the embodiment of the invention one
NCarry out the polarity synoptic diagram after electric charge is shared on the row between each pixel cell;
Fig. 9 is R on the liquid crystal panel in the embodiment of the invention one
NEach pixel cell and R on the row
N+1Carry out the polarity synoptic diagram after secondary charges is shared on the row between each pixel cell;
Figure 10 is R on the liquid crystal panel in the embodiment of the invention one
NPolarity synoptic diagram when each pixel cell charges on the row;
Wherein, 101, grid line, 102, data line, 103, pixel cell; 104, TFT, 301, the DC-DC circuit, 302, sequential control circuit; 303, Gamma circuit, 304, horizontal drive circuit, 305, column drive circuit; 306, backlight drive circuit module, 307, backlight, 308, liquid crystal panel.
Embodiment
The general power consumption of digital control circuit part is less in the LCD driving circuit, and its power consumption accounts for the way circuit power consumption less than 10%.And the power consumption of row drive part roughly can be divided into: quiescent dissipation and dynamic power consumption two parts.Wherein, quiescent dissipation depends primarily on the operational amplifier and the dc bias circuit thereof of driving circuit, and dynamic power consumption mainly determines that by the loss that discharges and recharges of LCD pixel total dynamic power consumption can obtain based on formula (1).
Pdynamic＝V
dd*N*C
1*V
swing*Frow/2 (1)
In the formula (1), V
DdThe expression supply voltage, the columns that N indicates to drive, C
1The size of representing every row drive capacitor, V
SwingThe average amplitude of fluctuation of expression output voltage, i.e. difference between the original voltage of pixel cell and the voltage that need reach on the liquid crystal panel, Frow representes line-scanning frequency.Wherein, N, C
1Determine by the performance parameter of wanting LCD driven with Frow, definite usually constant, have only V
SwingRelevant with driving circuit itself.Therefore, basic thought of the present invention is: a kind of method for driving liquid crystal display and device are provided, can reduce V
SwingThereby, reach the purpose that reduces power consumption.
Method for driving liquid crystal display of the present invention, as shown in Figure 2, mainly can comprise the steps:
Step 201: carry out electric charge in the current scan line between the pixel cell of adjacent columns and share, the voltage on the pixel cell storage capacitors of each adjacent columns in the current scan line is averaged;
Particularly; The TFT that horizontal drive circuit is controlled each pixel cell in the current scan line is in closed condition; Comprise two adjacent on the column drive circuit control liquid crystal panel of switches set data lines and connect and break off, when corresponding switches set is closed, the pixel cell conducting in the current scan line on the adjacent columns; Opposite polarity pixel cell charging neutrality between any two on the then current scan line, the voltage in the current scan line on each row pixel cell storage capacitors is average.
Step 202: carry out secondary charges in the current scan line and in next scan line between the pixel cell of same column and share, with in the current scan line with next scan line in voltage on the same column pixel cell storage capacitors average again;
Particularly; The TFT that horizontal drive circuit is controlled each pixel cell in TFT and next scan line of each pixel cell in the current scan line opens; Corresponding switches set is broken off in the column drive circuit; Two adjacent data lines break off and connecting on the liquid crystal panel; Pixel cell in the current scan line on the adjacent columns breaks off, and secondary charges is shared between the same column pixel cell of then current scan line and next scan line, with in the current scan line with next scan line in voltage on the same column pixel cell storage capacitors average again.
Step 203: each pixel cell in the current scan line is charged.
Particularly, the TFT that horizontal drive circuit is controlled each pixel cell in the current scan line opens, and the TFT that controls each pixel cell in next scan line closes; Column drive circuit output MM CAP driving voltage is each pixel cell charging to each pixel cell of current scan line.
Here, said method also comprises: each pixel cell of next scan line is carried out said electric charge is shared, secondary charges is shared the back charging, so back and forth, the charging of last column pixel cell of liquid crystal panel is accomplished on LCD.
Wherein, On said horizontal drive circuit output line scan signals each grid line to the liquid crystal panel; When the line scan signals on said grid line is high level; The TFT that each pixel cell is corresponding on this grid line institute corresponding row opens, and when said line scan signals was low level, the TFT that each pixel cell is corresponding on this grid line institute corresponding row closed.
Wherein, said column drive circuit connects each data line on the said liquid crystal panel through switches set, the corresponding said data line of said switches set; When said column drive circuit is controlled pairing two the switches set conductings of adjacent two data lines; Said adjacent two data lines connect; When said column drive circuit was controlled pairing two switches set of adjacent two data lines and broken off, said adjacent two data lines broke off.
Accordingly; The present invention also provides a kind of liquid crystal display drive unit, it is characterized in that, said device comprises: horizontal drive circuit and column drive circuit; Wherein, Horizontal drive circuit and column drive circuit are used for controlling jointly and carry out electric charge between the pixel cell of current scan line adjacent columns and share, and the voltage on the pixel cell storage capacitors of each adjacent columns in the current scan line is averaged; And; And carry out secondary charges between the pixel cell of same column in the current scan line of the common control of said column drive circuit and in next scan line and share, the voltage on each pixel cell storage capacitors in the voltage on each pixel cell storage capacitors in the current scan line and next scan line is averaged; Said column drive circuit also is used for each pixel cell in the current scan line being charged after the voltage on each pixel cell storage capacitors averages in the voltage on each pixel cell storage capacitors of current scan line and next scan line.
Particularly, said horizontal drive circuit is used for controlling the TFT unlatching of current each pixel cell of scan line or closing, and is used for when the TFT of current each pixel cell of scan line of control opens, and the TFT that controls each pixel cell in next scan line opens or closes; Said column drive circuit is used for two adjacent on liquid crystal panel data lines are connected or disconnection, controls pixel cell conducting or disconnection on the adjacent columns in the current scan line.
Here; Said horizontal drive circuit; Can be used to export line scan signals each grid line to the liquid crystal panel, when the line scan signals on said grid line was high level, the TFT that each pixel cell is corresponding on this grid line institute corresponding row opened; When said line scan signals was low level, the TFT that each pixel cell is corresponding on this grid line institute corresponding row closed.
Here, said column drive circuit comprises switches set, and said switches set is used to connect each data line on the said liquid crystal panel, the corresponding said data line of said switches set; When said column drive circuit is controlled pairing two the switches set conductings of adjacent two data lines; Said adjacent two data lines connect; When said column drive circuit was controlled pairing two switches set of adjacent two data lines and broken off, said adjacent two data lines broke off and connecting.
Embodiment one
The composition structure of liquid crystal display drive unit is as shown in Figure 3 in the present embodiment, and the liquid crystal display drive unit mainly comprises DC-DC circuit (DCDC) 301, sequential control circuit (T
CON) 302, Gamma circuit (Gamma Circuit) 303, horizontal drive circuit 304, column drive circuit 305 and backlight drive circuit module (B/L Circuit) 306.
Wherein, DC-DC circuit 301 is used to provide aanalogvoltage (AVDD), digital voltage (DVDD), gate off voltage (V
Off), grid cut-in voltage (V
On); Sequential control circuit 302 is in order to the signal of conversion from system end; The data input of coupling column drive circuit; Produce various timing control signals simultaneously, comprise frame start signal (STV signal), row clock sweep signal (CPV signal), data load signal (Load signal), polarity inversion signal (POL signal); Gamma circuit 303 converts the aanalogvoltage (AVDD) of input into gray scale reference voltages, offers column drive circuit 305.Backlight drive circuit module 306 connects Backlight For Liquid Crystal Display Panels (Backlight) 307, for Backlight For Liquid Crystal Display Panels 307 provides driving voltage (V
Out).
As shown in Figure 6; Driving circuit connects the data line of liquid crystal panel (Panel) on the LCD through self switches set, and controls the conducting and the disconnection of each switches set through said row control signal, and said switches set is used to control connection and the disconnection between adjacent two data lines; Particularly; The corresponding data line of switches set, when two adjacent switches set conductings, two corresponding respectively adjacent data lines of said two adjacent switch groups connect; When said two adjacent switches set were broken off, corresponding two adjacent data lines broke off.
Particularly, as shown in Figure 6, a switches set comprises three switches, is respectively switch S, switch S
1And switch S
2, switch S CS S
1And switch S
2Comprise N bar data line (N is the even number greater than 0) on the said liquid crystal panel; Be respectively data line 1, data line 2, data line 3, data line 4 ..., data line N-1, data line N; Corresponding; Column drive circuit then comprise respectively switches set 1, switches set 2, switches set 3, switches set 4 ..., switches set N-1, switches set N; Wherein, switches set 1, switches set 2, switches set 3, switches set 4 ..., switches set N-1, switches set N connect respectively data line 1, data line 2, data line 3, data line 4 ..., data line N-1, data line N.The switch S of switches set 1
1Connect data line 1, the switch S of switches set 1
2Connect data line 2, the switch S of switches set 2
1Connect data line 1, the switch S of switches set 2
2Connect data line 2.The switch S of switches set 3
1Connect data line 3, the switch S of switches set 3
2Connect data line 4, the switch S of switches set 4
1Connect data line 3, the switch S of switches set 4
2Connect data line 4.So analogize the switch S of switches set N-1
1Connect data line N-1, the switch S of switches set N-1
2Connect data line N, the switch S of switches set N
1Connect data line N-1, the switch S of switches set N
2Connect data line N.
Wherein, switch S, S
1, S
2By column drive circuit control, each switch all is to be made up of metal-oxide half field effect transistor (MOSFET, Metal-Oxide-Semiconductor Field-Effect Transistor).Particularly; The switch S of each switches set is controlled by the switch S control signal of exporting the row control signal at said arrange control circuit, and when the switch S control signal was high level, the switch S of each switches set was all closed; When the switch S control signal was low level, the switch S of each switches set was all broken off; The switch S of each switches set
1By the switch S of exporting the row control signal at said arrange control circuit
1Control signal is controlled, in switch S
1When control signal is high level, the switch S of each switches set
1All closed, in switch S
1When control signal is low level, the switch S of each switches set
1All break off; The switch S of each switches set
2By the switch S of exporting the row control signal at said arrange control circuit
2Control signal is controlled, in switch S
1When control signal is high level, the switch S of each switches set
2All closed, in switch S
2When control signal is low level, the switch S of each switches set
2All break off.
In the present embodiment, suppose that LCD carries out monochrome and drives, the positive voltage of driving is V
H, negative voltage is V
LAs shown in Figure 7 in last polarity after once drive finishing, at this moment, in the liquid crystal display driving process to any R of delegation
NThe process that pixel cell charges in the row specifically can comprise the steps:
Step 2: the line scan signals of horizontal drive circuit output is in like the state shown in 2. among Fig. 4, R
NThe line scan signals of row becomes high level, R
N+1The line scan signals of row becomes high level, R
NRow and R
N+1The TFT of each pixel cell all opens in the row, and at this moment, the row control signal of column drive circuit is like the state shown in 2. among Fig. 5, at this moment, and switch S, S
1And S
2Control signal be low level, then switch S, S
1And S
2Be off-state, the connection between adjacent two column data lines is broken off, and current scan line is R
NRow and next scan line R
N+1The TFT of row all opens R
NEach pixel cell and R in the row
N+1Carry out secondary charges in the row between each pixel cell and share R
NRow and R
N+1The charges of different polarity neutralization of row storage is just by the same R that is listed as
N+1The storage capacitors of each pixel cell is given R on the row
NThe storage capacitors of each pixel cell charging on the row, so as shown in Figure 9, obtain RN capable in magnitude of voltage on each pixel cell storage capacitors be 3V
H/ 4+V
L/ 4 or V
H/ 4+3V
L/ 4;
Step 3: the line scan signals of horizontal drive circuit output becomes like the state shown in 3. among Fig. 4, R
NThe line scan signals of row is maintained high level, R
N+1The line scan signals of row becomes low level, R
NThe TFT of row keeps opening, R
N+1TFT on the row closes, and simultaneously, the row control signal of column drive circuit becomes like state, switch S and the switch S shown in 3. among Fig. 5
1Control signal become high level, switch S
2Control signal be low level, then switch S and switch S
1Closure, switch S
2Break off, shown in figure 10, the MM CAP driving voltage that column drive circuit output self produces is given R
NEach pixel cell in the row is R
NEach pixel cell charging obtains required voltage in the row.
And the like; Flow process according to above-mentioned steps 1-step 3 drives charging to each pixel cell of going in the liquid crystal panel on the LCD since first row successively; Finish until last column charging, accomplish one time the line scanning process, realize the driving process of liquid crystal display.
Wherein, the variation of line scan signals can realize through frequency synthesis, is that the square wave of two distinct pulse widths is synthetic, forms the synthetic square wave with distinct pulse widths driven.
Under the prerequisite of not considering digital power consumption and quiescent dissipation, operate V according to the method described above
SwingSize be V
HWith 3V
H/ 4+V
LDifference between/4 or V
H/ 4+3V
L/ 4 and V
LBetween difference, i.e. V
H/ 4-V
L/ 4, and V in the classic method
SwingSize be V
H-V
L, therefore, V
SwingSize be merely in the classic method 1/4, in the substitution formula (1), the dynamic power consumption that can get after electric charge is shared can reduce 75%.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (11)
1. a method for driving liquid crystal display is characterized in that, said method comprises:
Carry out electric charge in the current scan line between the pixel cell of adjacent columns and share, the voltage on the pixel cell storage capacitors of each adjacent columns in the current scan line is averaged;
Carry out secondary charges in the current scan line and in next scan line between the pixel cell of same column and share, with the voltage on each pixel cell storage capacitors in the current scan line, with next scan line in voltage on each pixel cell storage capacitors average;
Each pixel cell in the current scan line is charged.
2. according to the said method for driving liquid crystal display of claim 1, it is characterized in that, carry out electric charge in the said current scan line between the pixel cell of adjacent columns and share, the voltage on the pixel cell storage capacitors of each adjacent columns in the current scan line is averaged, comprising:
The thin film transistor (TFT) (TFT) that horizontal drive circuit is controlled each pixel cell in the current scan line is in closed condition;
Column drive circuit connects the pixel cell conducting in the current scan line on the adjacent columns with two adjacent on liquid crystal panel data lines;
Charging neutrality between the opposite polarity adjacent pixel unit on the current scan line, the voltage in the current scan line on each adjacent columns pixel cell storage capacitors is average.
3. according to the said method for driving liquid crystal display of claim 1; It is characterized in that; Carrying out secondary charges in the said current scan line and in next scan line between the pixel cell of same column shares; Voltage on each pixel cell storage capacitors in voltage on each pixel cell storage capacitors in the current scan line and next scan line is averaged, comprising:
The TFT that horizontal drive circuit is controlled each pixel cell in TFT and next scan line of each pixel cell in the current scan line opens;
Column drive circuit breaks off two adjacent on liquid crystal panel data lines, and the pixel cell in the current scan line on the adjacent columns breaks off;
Charging neutrality between the same column pixel cell of current scan line and next scan line, with in the current scan line with next scan line in voltage on the same column pixel cell storage capacitors average again.
4. according to the said method for driving liquid crystal display of claim 1, it is characterized in that, said each pixel cell in the current scan line charged, comprising:
The TFT that horizontal drive circuit is controlled each pixel cell in the current scan line opens, and the TFT that controls each pixel cell in next scan line closes;
Column drive circuit output MM CAP driving voltage is each pixel cell charging to each pixel cell of current scan line.
5. according to claim 2,3 or 4 said method for driving liquid crystal display, it is characterized in that,
On said horizontal drive circuit output line scan signals each grid line to the liquid crystal panel; When the line scan signals on said grid line is high level; The TFT that each pixel cell is corresponding on this grid line institute corresponding row opens; When said line scan signals was low level, the TFT that each pixel cell is corresponding on this grid line institute corresponding row closed.
6. according to claim 2,3 or 4 said method for driving liquid crystal display, it is characterized in that,
Said column drive circuit connects each data line on the said liquid crystal panel through switches set, the corresponding said data line of said switches set;
When said column drive circuit is controlled pairing two the switches set conductings of adjacent two data lines; Said adjacent two data lines connect; When said column drive circuit was controlled pairing two switches set of adjacent two data lines and broken off, said adjacent two data lines broke off.
7. according to each said method for driving liquid crystal display of claim 1 to 4, it is characterized in that said method also comprises:
Each pixel cell of next scan line carried out said electric charge is shared, secondary charges is shared the back charging, so back and forth, the charging of last column pixel cell of liquid crystal panel is accomplished on LCD.
8. a liquid crystal display drive unit is characterized in that, said device comprises: horizontal drive circuit and column drive circuit, wherein,
Horizontal drive circuit and column drive circuit are used for controlling jointly and carry out electric charge between the pixel cell of current scan line adjacent columns and share, and the voltage on the pixel cell storage capacitors of each adjacent columns in the current scan line is averaged; And; And carry out secondary charges between the pixel cell of same column in the current scan line of the common control of said column drive circuit and in next scan line and share, the voltage on each pixel cell storage capacitors in the voltage on each pixel cell storage capacitors in the current scan line and next scan line is averaged;
Said column drive circuit also is used for each pixel cell in the current scan line being charged after the voltage on each pixel cell storage capacitors averages in the voltage on each pixel cell storage capacitors of current scan line and next scan line.
9. said according to Claim 8 liquid crystal display drive unit is characterized in that,
Said horizontal drive circuit, the TFT that is used for controlling current each pixel cell of scan line opens or closes, and when the TFT of each pixel cell opened in the current scan line of control, the TFT that controls each pixel cell in next scan line opened or closes;
Said column drive circuit is used for two adjacent on liquid crystal panel data lines are connected or disconnection, controls pixel cell conducting or disconnection on the adjacent columns in the current scan line.
10. according to Claim 8 or 9 said liquid crystal display drive units, it is characterized in that,
Said horizontal drive circuit; Also be used to export line scan signals each grid line to the liquid crystal panel; When the line scan signals on said grid line is high level; The TFT that each pixel cell is corresponding on this grid line institute corresponding row opens, and when said line scan signals was low level, the TFT that each pixel cell is corresponding on this grid line institute corresponding row closed.
11. according to Claim 8 or 9 said liquid crystal display drive units, it is characterized in that,
Said column drive circuit comprises switches set, and said switches set is used to connect the data line of each adjacent columns on the said liquid crystal panel, the corresponding said data line of said switches set;
When said column drive circuit is controlled pairing two the switches set conductings of adjacent two data lines; Said adjacent two data lines connect; When said column drive circuit was controlled pairing two switches set of adjacent two data lines and broken off, said adjacent two data lines broke off.
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103345094A (en) * | 2013-07-09 | 2013-10-09 | 深圳市华星光电技术有限公司 | LCD panel, drive method and LCD device |
| US9286844B2 (en) | 2013-07-09 | 2016-03-15 | Shenzhen China Star Optoelectronics Technology Co., Ltd | LC panel having switch unit, and LCD device having switch unit |
| CN105869594A (en) * | 2016-06-02 | 2016-08-17 | 京东方科技集团股份有限公司 | Drive method, liquid crystal display panel and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103345094A (en) * | 2013-07-09 | 2013-10-09 | 深圳市华星光电技术有限公司 | LCD panel, drive method and LCD device |
| WO2015003361A1 (en) * | 2013-07-09 | 2015-01-15 | 深圳市华星光电技术有限公司 | Liquid crystal display panel, driving method, and liquid crystal display apparatus |
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| CN103345094B (en) * | 2013-07-09 | 2016-06-29 | 深圳市华星光电技术有限公司 | A kind of liquid crystal panel, driving method and liquid crystal indicator |
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| CN109817171A (en) * | 2017-11-22 | 2019-05-28 | 奇景光电股份有限公司 | Show equipment and its driving method |
| CN110599942A (en) * | 2019-09-30 | 2019-12-20 | 京东方科技集团股份有限公司 | Display panel driving method and device and display device |
| CN114519986A (en) * | 2022-02-16 | 2022-05-20 | 重庆惠科金渝光电科技有限公司 | Drive circuit, drive device, display device, and drive method |
| CN114519986B (en) * | 2022-02-16 | 2023-02-28 | 重庆惠科金渝光电科技有限公司 | Drive circuit, drive device, display device, and drive method |
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