CN103839524B - Liquid crystal display and source electrode driver thereof and control method - Google Patents
Liquid crystal display and source electrode driver thereof and control method Download PDFInfo
- Publication number
- CN103839524B CN103839524B CN201210474023.7A CN201210474023A CN103839524B CN 103839524 B CN103839524 B CN 103839524B CN 201210474023 A CN201210474023 A CN 201210474023A CN 103839524 B CN103839524 B CN 103839524B
- Authority
- CN
- China
- Prior art keywords
- signal
- driving mode
- inversion driving
- drive
- reference voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The open a kind of liquid crystal display of the present invention, including a display panels, it is used for showing picture, time schedule controller, it is used for producing a polarity control signal and a latch-up signal, and one drive circuit, including multiple source electrode drivers, every one source driver includes a comparing unit, compare with one first reference voltage and one second reference voltage in order to share electrode voltage by one, to produce a comparative result, one enable unit, it is used for according to this comparative result, one source drive signal and a reset signal, produce an enable signal, one level point reversion control unit, it is used for according to this enable signal, produce a level point reverse control signal, and a Polarity Control unit, it is used for according to this enable signal, this polarity control signal and this latch-up signal, produce a polarity inversion control signal and this reset signal.
Description
Technical field
The present invention relates to a kind of liquid crystal display and drive circuit thereof and control method, espespecially a kind of by the shared electricity of detecting
The mode of pole tension, the liquid crystal display of in good time switch drive mode and drive circuit thereof and control method.
Background technology
Liquid crystal display (liquid crystal display monitor, LCD monitor) have external form frivolous, consumption
Electricity is few and the characteristic such as radiationless pollution, has been widely used in computer system, mobile phone, personal digital assistant
On information products such as (personal digital assistant, PDA).The operation principle of liquid crystal display is to utilize liquid crystal to divide
Son, under different ordered states, has different polarizations or refraction effect to light, therefore can be via the liquid of different ordered states
Brilliant molecule controls the penetration of light, produce the output light of varying strength further, and different GTG intensity red, green,
Blue light.Liquid crystal display generally uses time schedule controller (timing controller) and produces the number being relevant to show image
The number of it is believed that, and drive the control signal needed for display panels and frequency signal.The source electrode driver of liquid crystal display
(source driver) foundation data signal, control signal and frequency signal again is to produce the driving signal of display panels.
It is said that in general, the polarity of voltage being applied to liquid crystal material layer two ends must invert at set intervals, in order to
Liquid crystal material is avoided to produce polarization and cause permanent destruction, also in order to avoid image remaining (image sticking) effect
Should, typically can use picture reversion (frame inversion), line reversion (line inversion) or some reversion (dot
Etc. inversion) mode drives liquid crystal display, and therefore source electrode driver often needs to repeat discharge and recharge to provide different
The driving signal of polarity.On the other hand, the output of time schedule controller also can switch between logic 1 and logical zero.
Liquid crystal display can produce shared electrode voltage (common electrode voltage, Vcom) when operation,
And the generation of string shadow (crosstalk) phenomenon is i.e. relevant with shared electrode voltage.String shadow phenomenon is display panels Zhong Mou district
The picture in territory has influence on the phenomenon of adjacent domain brightness, and the one of producing cause is that the stability of shared electrode voltage is the best.Just use
For the liquid crystal display of television applications, the picture that display panels mainly shows is dynamic menu, less susceptible generation
String shadow phenomenon, great majority there is no for string shadow phenomenon design solution party for the liquid crystal display of television applications the most now
Case.And for the liquid crystal display for intelligent television applications, liquid crystal display can show more tableaux, therefore go here and there
The chance that shadow phenomenon produces will be greatly improved.
Liquid crystal display to be solved produces the problem of string shadow phenomenon, mainly can pass through two ways, and therein one is stable
Shared electrode voltage.But, for large scale liquid crystal display, the load of its shared electrode voltage is excessive, and be difficult to for
Shared electrode voltage does the control of back coupling compensation voltage stabilizing.
The another kind of method solving liquid crystal display generation string shadow phenomenon problem is to detect special type by time schedule controller
Formula changes its type of drive.The existing known liquid crystal display of industry utilizes custom design in detecting display picture to switch driving
Mode, to get rid of the generation of string shadow phenomenon.
Refer to the schematic diagram that Fig. 1, Fig. 1 are a known liquid crystal display 10.Liquid crystal display 10 includes a liquid crystal
Show panel 100, time schedule controller 102 and one drive circuit 104.Display panels 100 is used for showing picture, and it is by two
Substrate (Substrate) is constituted, and is filled with liquid crystal material (LCD layer) between two substrates.Time schedule controller 102 is used for producing
The raw data signal being relevant to show image, and drive the control signal needed for display panels 100 and frequency signal, i.e.
An one polarity control signal POL and latch-up signal LD.Time schedule controller 102 is separately detected on display panels 100 and is shown picture
Custom design, after detecting custom design, send level point reverse control signal H2DOT, change display panels 100
Type of drive be horizontal two-dot inversion type of drive.Drive circuit 104 includes multiple source electrode driver SD_1～SD_i, depends on
The signal transmitted according to time schedule controller 102 produces corresponding driving signal respectively, is used for changing liquid in display panels 100
The arrangement of brilliant molecule and corresponding light penetration amount, to show image data on display panels 100.
Please continue to refer to the schematic diagram that Fig. 2, Fig. 2 are known one source driver 20.Source electrode driver 20 is in representative graph 1
Source electrode driver SD_1～SD_i, includes level point reversion control unit 200 and an output unit 202.Level point inverts
Control unit 200, when detecting the custom design shown in picture, produces a level point reverse control signal H2DOT, and then
The type of drive of switching output unit 202 is horizontal two-dot inversion type of drive.Output unit 202 is coupled to level point reversion control
Unit 200 processed, is used for according to level point reverse control signal H2DOT, polarity control signal POL and latch-up signal LD, adjusts it
Type of drive.
Known liquid crystal display 10 can detect various custom design, it may be judged whether has the generation of string shadow phenomenon.For example,
Refer to Fig. 3 A, Fig. 3 A is the schematic diagram of a custom design 300A in a display picture 30A.Custom design 300A is bright by 8
Sub-pixel (sub-pixel) and 7 dark sub-pixel cross arrangement compositions, say, that between each two transom pixel, all have one
Dark sub-pixel.As long as time schedule controller 102 detects in display picture 30A and there are custom design 300A, i.e. produce level point
Reverse control signal H2DOT, to switch to horizontal two-dot inversion type of drive by type of drive.On the other hand, above-mentioned 8 transoms
Pixel and 7 dark sub-pixels are dispersed in same display picture.As shown in Figure 3 B, custom design 300B is 8 transom pixels and 7
Individual dark sub-pixel is dispersed on display picture 30B.Similarly, there are if time schedule controller 102 detects in display picture 30B
Custom design 300B, i.e. produces level point reverse control signal H2DOT, so that type of drive to switch to horizontal two-dot inversion drive
Mode.
But, for large scale liquid crystal display, owing to picture display area is relatively big, detecting causes picture to produce string shadow
The custom design of phenomenon will become difficulty.As a example by Fig. 3 B, if the distribution of transom pixel and dark sub-pixel is too in dispersion, sequential
Controller being close to of scanning display picture all must just may detect that custom design, causes detecting custom design to be difficult to, may lead
Cause to reduce the quality that picture shows.
Summary of the invention
Therefore, the present invention provides a kind of liquid crystal display and drive circuit thereof and control method, and it can be shared by detecting
The method of electrode voltage, detect shared electrode overtension or too low time, in good time switch drive mode, with stably share electricity
Pole tension, it is to avoid shared electrode variation in voltage is excessive and produces string shadow phenomenon, maintains image display quality.
The open a kind of liquid crystal display of the present invention, includes a display panels, is used for showing picture；For the moment
Sequence controller, is used for producing a polarity control signal and a latch-up signal；And one drive circuit, include multiple source drive
Device, one first reference voltage and one second reference voltage；Wherein, every one source driver of the plurality of source electrode driver includes
One comparing unit, compares with one first reference voltage and one second reference voltage in order to share electrode voltage by one, to produce one
Comparative result；One enable unit, is coupled to this comparing unit, is used for according to this comparative result, a source drive signal and a weight
Confidence number, produces an enable signal；One level point reversion control unit, is coupled to this enable unit, is used for believing according to this enable
Number, produce a level point reverse control signal；And a Polarity Control unit, it is coupled to this enable unit, is used for according to this cause
Energy signal, this polarity control signal and this latch-up signal, produce a polarity inversion control signal and this reset signal；Wherein, should
Level point reverse control signal and this polarity inversion control signal are used to determine a type of drive of this liquid crystal display；Its
In, this first reference voltage is higher than this second reference voltage.
Invention additionally discloses a kind of source electrode driver for a liquid crystal display, include a comparing unit, in order to incite somebody to action
One shares electrode voltage compares with one first reference voltage and one second reference voltage, to produce a comparative result；One enable list
Unit, is coupled to this comparing unit, is used for according to this comparative result, a source drive signal and a reset signal, produces an enable
Signal；One level point reversion control unit, is coupled to this enable unit, is used for according to this enable signal, produces a level point anti-
Turn control signal；And a Polarity Control unit, it is coupled to this enable unit, is used for according to this enable signal, a Polarity Control
Signal and a latch-up signal, produce a polarity inversion control signal and this reset signal；Wherein, this level point reverse control signal
And this polarity inversion control signal is used to determine a type of drive of this liquid crystal display；Wherein, this first reference voltage is high
In this second reference voltage.
Invention additionally discloses a kind of control method for a liquid crystal display, include and share electrode voltage and by one
First reference voltage and one second reference voltage compare, to produce a comparative result；According to this comparative result, a source drive letter
Number and a reset signal, produce an enable signal；According to this enable signal, produce a level point reverse control signal；And root
According to this enable signal, a polarity control signal and a latch-up signal, produce a polarity inversion control signal and this reset signal；Its
In, this level point reverse control signal and this polarity inversion control signal are used to determine a driving side of this liquid crystal display
Formula；Wherein, this first reference voltage is higher than this second reference voltage.
Coordinate following schemes, the detailed description of embodiment and claims at this, by address other mesh of the present invention
Be specified in advantage after.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a known liquid crystal display.
Fig. 2 is the schematic diagram of known one source driver.
Fig. 3 A is the schematic diagram of a custom design in a display picture.
Fig. 3 B is the schematic diagram of a custom design in a display picture.
Fig. 4 is the schematic diagram of the embodiment of the present invention one liquid crystal display.
Fig. 5 is the schematic diagram of embodiment of the present invention one source driver.
Fig. 6 is the schematic diagram of enable unit in Fig. 5.
Fig. 7 is the schematic diagram of Polarity Control unit in Fig. 5.
Fig. 8 is the schematic diagram of the embodiment of the present invention one type of drive switching flow.
Fig. 9 A is the schematic diagram of the embodiment of the present invention horizontal two-dot inversion type of drive.
Fig. 9 B is that the embodiment of the present invention horizontal two-dot inversion type of drive combines vertical 1+N point (N=2) inversion driving mode
Schematic diagram.
Fig. 9 C is that the embodiment of the present invention horizontal two-dot inversion type of drive combines vertical N point (N=3) inversion driving mode
Schematic diagram.
Fig. 9 D be the embodiment of the present invention horizontal two-dot inversion type of drive combine vertical N+M point (N=2 and M=3) reversion drive
The schematic diagram of flowing mode.
Figure 10 is the sequential chart of coherent signal in source electrode driver in Fig. 5.
Figure 11 is the schematic diagram of the embodiment of the present invention one control flow.
Wherein, description of reference numerals is as follows:
10,40 liquid crystal display
100,400 display panels
102,402 time schedule controller
104,404 drive circuit
20,50, SD_1～SD_i source electrode driver
200,504 level point reversion control unit
202,508 output unit
30A, 30B show picture
300A, 300B custom design
500 comparing units
502 enable unit
506 Polarity Control unit
602 logical blocks
604 source drive signaling control units
700 counting units
702 frequency elimination unit
704 multi-task units
80,110 flow process
800,802,804,806,808,1100,1102, step
1104、1106、1108
VCOM shared electrode voltage
Vref1, Vref2 reference voltage
ENB enable signal
POL polarity control signal
POL1 frequency elimination signal
POL2 polarity inversion control signal
LD latch-up signal
CD source drive signal
H2DOT level point reverse control signal
RST reset signal
COMP comparative result
Detailed description of the invention
Refer to the schematic diagram that Fig. 4, Fig. 4 are the embodiment of the present invention one liquid crystal display 40.Liquid crystal display 40 includes
One display panels 400, time schedule controller 402 and one drive circuit 404.Display panels 400 and time schedule controller
The effect of 402 is identical with known display panels 100 and time schedule controller 102 respectively, therefore is not repeated herein.Drive circuit
404 include multiple source electrode driver SD_1～SD_i, reference voltage Vref 1 and Vref2.Every one source driver SD_1～
SD_i is used for detecting the shared electrode voltage VCOM of display panels 400, and by shared electrode voltage VCOM and reference voltage
Vref1, Vref2 compare, to decide whether to change type of drive.Every one source driver SD_1～SD_i exports or accepts
One source drive signal CD, to inform whether itself and system change type of drive.
Please continue to refer to the schematic diagram that Fig. 5, Fig. 5 are embodiment of the present invention one source driver 50.Source electrode driver 50 is
Source electrode driver SD_1～SD_i in representative graph 4, includes comparing unit 500, enable unit 502, level point reversion
Control unit 504, one Polarity Control unit 506 and an output unit 508.Comparing unit 500 compares shared electrode voltage VCOM
With reference voltage Vref 1, Vref2, to produce a comparative result COMP.Wherein, reference voltage Vref 1 is higher than reference voltage
Vref2.Enable unit 502, according to comparative result COMP, a reset signal RST and a source drive signal CD, produces an enable
Signal ENB.Level point reversion control unit 504 is coupled to enable unit 502, is used for according to enable signal ENB, produces a level
Point reverse control signal H2DOT, and then control the output state of output unit 508.Polarity Control unit 506 is coupled to enable list
Unit 502, is used for according to enable signal ENB, polarity control signal POL and latch-up signal LD, produces a polarity inversion control signal
POL2 and reset signal RST, the enable signal ENB of output state and enable unit 502 to control output unit 508 respectively.
Output unit 508 is coupled to level point reversion control unit 504 and Polarity Control unit 506, is used for according to level point reversion control
Signal H2DOT processed, polarity inversion control signal POL2 and latch-up signal LD, adjust its output state.
Fig. 6 is asked for an interview about the embodiments possible of enable unit 502 in Fig. 5.In figure 6, enable unit 502 includes one
Logical block 602 and a source drive signaling control unit 604.Source drive signaling control unit 604 is used for providing source electrode to drive
Dynamic signal.Logical block 602 is used for logical operations comparative result COMP, source drive signal CD and reset signal RST, to produce
An enable signal ENB and logical signal CDX.Source drive signaling control unit 604 is coupled to logical block 602, for basis
Logical signal CDX produced by logical block 602, controls source drive signal CD high levle or low level state.
Fig. 7 is asked for an interview about the embodiments possible of Polarity Control unit 506 in Fig. 5.In the figure 7, Polarity Control unit 506
Include counting unit 700, one frequency elimination unit 702 and a multi-task unit 704.Counting unit 700 is used for believing according to enable
Number ENB and polarity control signal POL, adds up a count value, and when count value arrives a default value, switch drive mode is
One normal columns inversion driving mode, design value of laying equal stress on.Polarity control signal POL and latch-up signal LD is removed by frequency elimination unit 702
Frequently, to produce frequency elimination signal POL1.Multi-task unit 704 is coupled to frequency elimination unit 702, is used for coming many according to enable signal ENB
Task processes polarity control signal POL and frequency elimination signal POL1, with polarization reverse control signal POL2.
Refer to the schematic diagram that Fig. 8, Fig. 8 are the embodiment of the present invention one type of drive switching flow 80.Type of drive switches
It is the most too high or too low that flow process 80 is used for detecting shared electrode voltage VCOM, includes the following step:
Step 800: start.
Step 802: judge that whether shared electrode voltage VCOM is higher than reference voltage Vref 1 or less than reference voltage Vref 2.
If so, step 804 is carried out；Otherwise, carry out step 808.
Step 804: switch drive mode so that it is at least include horizontal two-dot inversion type of drive.
Step 806: apply mechanically the type of drive switched at several pictures.
Step 808: switch drive mode is normal columns inversion driving mode.
According to type of drive switching flow 80, first, comparing unit 500 detects shared electrode voltage VCOM, and judges altogether
Whether enjoy electrode voltage VCOM higher than reference voltage Vref 1 or less than reference voltage Vref 2.If shared electrode voltage VCOM is higher than
Reference voltage Vref 1, or shared electrode voltage VCOM is less than reference voltage Vref 2, then and switch drive mode is at least to include
Horizontal two-dot inversion type of drive.It is preferred that the type of drive through switching is horizontal two-dot inversion type of drive or level two point
Inversion driving mode combines vertical inversion driving mode.In the present invention, vertical inversion driving mode includes the reversion of vertical N point
(vertical N dot inversion) type of drive, vertical 1+N point reversion (vertical 1+N dot inversion)
Type of drive and vertical N+M point reversion (vertical N+M dot inversion) type of drive, wherein M is not less than 3 and N not
Less than 2.Horizontal two-dot inversion type of drive is controlled to produce by level point reversion control unit 504, and vertical inversion driving mode
Controlled to produce by Polarity Control unit 506.It is to say, the level point reversion that level point reversion control unit 504 produces controls
Polarity inversion control signal POL2 that signal H2DOT and Polarity Control unit 506 produce is used for determining that type of drive is level two
Point inversion driving mode, horizontal two-dot inversion type of drive combine vertical N point inversion driving mode, horizontal two-dot inversion driving side
Formula combines vertical 1+N point inversion driving mode or horizontal two-dot inversion type of drive combines vertical N+M point inversion driving mode.Defeated
Go out unit 508 and control display panels according to level point reverse control signal H2DOT with polarity inversion control signal POL2
400, make display panels 400 in follow-up several pictures show, use the type of drive switched.Above-mentioned steps has been carried out
Bi Hou, type of drive switches back into original type of drive, namely normal columns inversion driving mode, and again proceeds by shared
The detecting of electrode voltage VCOM.
If on the contrary, shared electrode voltage VCOM is between reference voltage Vref 1 and Vref2, then type of drive maintains
For normal columns inversion driving mode, and persistently carry out the detecting of shared electrode voltage VCOM.
Refer to Fig. 9 A to Fig. 9 D, Fig. 9 A to Fig. 9 D and be respectively the embodiment of the present invention horizontal two-dot inversion type of drive, water
Flat two-dot inversion type of drive combines vertical 1+N point (N=2) inversion driving mode, horizontal two-dot inversion type of drive combines and hangs down
Straight N point (N=3) inversion driving mode and horizontal two-dot inversion type of drive combine vertical N+M point (N=2 and M=3) reversion and drive
The schematic diagram of flowing mode collocation zigzag pixel (Flip-pixel) panel.Liquid crystal display 40 is optional switches to above-mentioned driving
The one of flowing mode.Note that the example of the type of drive that Fig. 9 A to Fig. 9 D is switching.The main spirits of the present invention, is detecting
After being higher than reference voltage Vref 1 to shared electrode voltage or be less than reference voltage Vref 2, switch drive mode, reduces shared
The variation of electrode voltage, to eliminate string shadow phenomenon.Therefore, any foundation present invention detects driving of shared electrode voltage method switching
Flowing mode, belongs to scope of the invention.
Refer to Figure 10, Figure 10 is the sequential chart of coherent signal in source electrode driver 50 in Fig. 5.As shown in Figure 10, detecing
Measure shared electrode voltage VCOM higher than reference voltage Vref 1 or less than after reference voltage Vref 2, enable unit 502 handover source
Pole drive signal CD be low level, enable signal ENB thus switch to low level.Level point reverse control signal H2DOT according to
Enable signal switches to low level, represents type of drive and switches to horizontal two-dot inversion type of drive.Figure 10 with vertical 2 anti-
As a example by turning type of drive, according to latch-up signal LD, polarity control signal POL in Figure 10 and enable signal ENB, polarity inversion controls
Signal is after switch drive mode, and in polarity control signal POL maintains the period of same level, POL2 presents and includes two
The waveform of LD pulse wave, is used for informing that type of drive includes vertical two-dot inversion type of drive.Therefore, in Fig. 10, switching
Type of drive is that horizontal two-dot inversion type of drive combines vertical two-dot inversion type of drive.After several (L) picture, cause
Can reply as high levle by signal ENB so that level point reverse control signal H2DOT returns according to this with polarity inversion control signal POL2
It is high levle again, type of drive is switched back into normal columns inversion driving mode, and restarts to detect whether shared electrode occurs
Voltage VCOM is higher than reference voltage Vref 1 or the situation less than reference voltage Vref 2.
Above-mentioned about source electrode driver SD_1 in liquid crystal display 40～the function mode of SD_i switch drive mode, can enter
One step is summarized as a control flow 110, as shown in figure 11.Control flow 110 includes following steps:
Step 1100: shared electrode voltage Vcom is compared with reference voltage Vref 1, Vref2, to produce comparative result
COMP。
Step 1102: according to comparative result COMP, source drive signal CD and reset signal RST, produces enable signal
ENB。
Step 1104: according to enable signal ENB, produces level point reverse control signal H2DOT.
Step 1106: according to enable signal ENB, polarity control signal POL and a latch-up signal LD, polarization reversion control
Signal POL2 processed and reset signal RST.
Step 1108: according to level point reverse control signal H2DOT and polarity inversion control signal POL2, determines liquid crystal
Show a type of drive of device 40.
Known liquid crystal display, by the way of detecting custom design, there are custom design in detecting display picture
Time, switch drive mode, to get rid of the generation of string shadow phenomenon.But, when the mode above by detecting custom design is applied to
During large scale liquid crystal display, owing to picture display area is relatively big, detecting causes picture to produce the custom design of string shadow phenomenon will
Become difficulty.In comparison, the liquid crystal display of the present invention is by the way of detecting shared electrode voltage, at shared electrode voltage
Time too high or too low, in good time switch drive mode, with stable shared electrode voltage, it is to avoid shared electrode variation in voltage is excessive and produces
Raw string shadow phenomenon.The present invention detects the mode liquid crystal display of shared electrode voltage not to be affected by liquid crystal display size, can
It is applied on large scale liquid crystal display.
In sum, the liquid crystal display of the present invention, by the way of detecting shared electrode voltage, shares electricity detecting
When pole tension is too high or too low, timely switch drive mode, with stable shared electrode voltage, it is to avoid shared electrode variation in voltage mistake
Produce string shadow phenomenon greatly, maintain image display quality.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (34)
1. a liquid crystal display, it is characterised in that include:
One display panels, is used for showing picture；
Time schedule controller, is used for producing a polarity control signal and a latch-up signal；And
One drive circuit, includes multiple source electrode driver, one first reference voltage and one second reference voltage；
Wherein, every one source driver of the plurality of source electrode driver includes:
One comparing unit, compares with this first reference voltage and this second reference voltage in order to share electrode voltage by one, to produce
A raw comparative result；
One enable unit, is coupled to this comparing unit, is used for resetting letter according to this comparative result, a source drive signal and one
Number, produce an enable signal；
One level point reversion control unit, is coupled to this enable unit, is used for according to this enable signal, produces a level point reversion
Control signal；And
One Polarity Control unit, is coupled to this enable unit, is used for according to this enable signal, this polarity control signal and this breech lock
Signal, produces a polarity inversion control signal and this reset signal；
Wherein, this level point reverse control signal and this polarity inversion control signal are used to determine a type of drive, and according to
This shared electrode voltage and this first reference voltage or the height relation of this second reference voltage, this type of drive switches on one the
Between one inversion driving mode and one second inversion driving mode；
Wherein, this first reference voltage is higher than this second reference voltage.
2. liquid crystal display as claimed in claim 1, it is characterised in that at this shared electrode voltage higher than this first reference electricity
When pressing or be less than this second reference voltage, this type of drive switches to this first inversion driving mode.
3. liquid crystal display as claimed in claim 2, it is characterised in that this first inversion driving mode is that a level 2 is anti-
Turn type of drive.
4. liquid crystal display as claimed in claim 2, it is characterised in that this first inversion driving mode is that a level 2 is anti-
Turn type of drive and combine a vertical N point inversion driving mode, and N is not less than 2.
5. liquid crystal display as claimed in claim 2, it is characterised in that this first inversion driving mode is that a level 2 is anti-
Turn type of drive and combine a vertical 1+N point inversion driving mode, and N is not less than 2.
6. liquid crystal display as claimed in claim 2, it is characterised in that this first inversion driving mode is that a level 2 is anti-
Turn type of drive and combine a vertical N+M point inversion driving mode, and M is not less than 2 not less than 3 and N.
7. liquid crystal display as claimed in claim 1, it is characterised in that at this shared electrode voltage less than this first reference electricity
When pressing and be higher than this second reference voltage, this type of drive switches to this second inversion driving mode.
8. liquid crystal display as claimed in claim 7, it is characterised in that this second inversion driving mode is a normal columns reversion
Type of drive.
9. liquid crystal display as claimed in claim 1, it is characterised in that this enable unit includes:
One logical block, for this comparative result of logical operations, this source drive signal and this reset signal, to produce this enable
Signal and a logical signal；And
One source drive signaling control unit, is coupled to this logical block, is used for according to this logical signal, controls this source drive
Signal high levle or the state of low level.
10. liquid crystal display as claimed in claim 1, it is characterised in that this Polarity Control unit includes:
One counting unit, is used for adding up a count value according to this enable signal and this polarity control signal, and arrives in this count value
When reaching a default value, switching this type of drive is a normal columns inversion driving mode, and resets this count value；
One frequency elimination unit, in order to by this polarity control signal and this latch-up signal frequency elimination, to produce a frequency elimination signal；And
One multi-task unit, is coupled to this frequency elimination unit, for this enable signal of multitasking, this polarity control signal and should
Frequency elimination signal, to produce this polarity inversion control signal.
11. liquid crystal displays as claimed in claim 1, it is characterised in that also include:
One output unit, is coupled to this level point reversion control unit and this Polarity Control unit, is used for according to this type of drive
Export a picture signal.
12. 1 kinds of source electrode drivers for a liquid crystal display, it is characterised in that include:
One comparing unit, compares with one first reference voltage and one second reference voltage in order to share electrode voltage by one, to produce
A raw comparative result；
One enable unit, is coupled to this comparing unit, is used for resetting letter according to this comparative result, a source drive signal and one
Number, produce an enable signal；
One level point reversion control unit, is coupled to this enable unit, is used for according to this enable signal, produces a level point reversion
Control signal；And
One Polarity Control unit, is coupled to this enable unit, is used for according to this enable signal, a polarity control signal and a breech lock
Signal, produces a polarity inversion control signal and this reset signal；
Wherein, this level point reverse control signal and this polarity inversion control signal are used to determine that the one of this liquid crystal display drives
Flowing mode, and according to this shared electrode voltage and this first reference voltage or the height relation of this second reference voltage, this driving
Mode switches between one first inversion driving mode and one second inversion driving mode；
Wherein, this first reference voltage is higher than this second reference voltage.
13. source electrode drivers as claimed in claim 12, it is characterised in that at this shared electrode voltage higher than this first reference
Voltage or less than this second reference voltage time, this type of drive switches to this first inversion driving mode.
14. source electrode drivers as claimed in claim 13, it is characterised in that this first inversion driving mode is level two point
Inversion driving mode.
15. source electrode drivers as claimed in claim 13, it is characterised in that this first inversion driving mode is level two point
Inversion driving mode combines a vertical N point inversion driving mode, and N is not less than 2.
16. source electrode drivers as claimed in claim 13, it is characterised in that this first inversion driving mode is level two point
Inversion driving mode combines a vertical 1+N point inversion driving mode, and N is not less than 2.
17. source electrode drivers as claimed in claim 13, it is characterised in that this first inversion driving mode is level two point
Inversion driving mode combines a vertical N+M point inversion driving mode, and M is not less than 2 not less than 3 and N.
18. source electrode drivers as claimed in claim 12, it is characterised in that at this shared electrode voltage less than this first reference
Voltage and higher than this second reference voltage time, this type of drive switches to this second inversion driving mode.
19. source electrode drivers as claimed in claim 18, it is characterised in that this second inversion driving mode is that a normal columns is anti-
Turn type of drive.
20. source electrode drivers as claimed in claim 12, it is characterised in that this enable unit includes:
One logical block, for this comparative result of logical operations, this source drive signal and this reset signal, to produce this enable
Signal and a logical signal；And
One source drive signaling control unit, is coupled to this logical block, is used for according to this logical signal, controls this source drive
Signal high levle or the state of low level.
21. source electrode drivers as claimed in claim 12, it is characterised in that this Polarity Control unit includes:
One counting unit, is used for adding up a count value according to this enable signal and this polarity control signal, and arrives in this count value
When reaching a default value, switching this type of drive is a normal columns inversion driving mode, and resets this count value；
One frequency elimination unit, in order to by this polarity control signal and this latch-up signal frequency elimination, to produce a frequency elimination signal；And
One multi-task unit, is coupled to this frequency elimination unit, for this enable signal of multitasking, this polarity control signal and should
Frequency elimination signal, to produce this polarity inversion control signal.
22. source electrode drivers as claimed in claim 12, it is characterised in that also include:
One output unit, is coupled to this level point reversion control unit and this Polarity Control unit, is used for according to this type of drive,
Export a picture signal.
23. source electrode drivers as claimed in claim 12, it is characterised in that this polarity control signal and this latch-up signal are by one
Time schedule controller produces.
24. 1 kinds of control methods for a liquid crystal display, it is characterised in that include:
Share electrode voltage to compare one with one first reference voltage and one second reference voltage, to produce a comparative result；
According to this comparative result, a source drive signal and a reset signal, produce an enable signal；
According to this enable signal, produce a level point reverse control signal；
According to this enable signal, a polarity control signal and a latch-up signal, produce a polarity inversion control signal and this replacement
Signal；And
According to this level point reverse control signal and this polarity inversion control signal, determine a driving side of this liquid crystal display
Formula, and according to this shared electrode voltage and this first reference voltage or the height relation of this second reference voltage, this type of drive
Switch between one first inversion driving mode and one second inversion driving mode；
Wherein, this first reference voltage is higher than this second reference voltage.
The control method of 25. such as claim 24, it is characterised in that this shared electrode voltage higher than this first reference voltage or
During less than this second reference voltage, this type of drive switches to this first inversion driving mode.
The control method of 26. such as claim 25, it is characterised in that this first inversion driving mode is that a horizontal two-dot inversion is driven
Flowing mode.
The control method of 27. such as claim 25, it is characterised in that this first inversion driving mode is that a horizontal two-dot inversion is driven
Flowing mode combines a vertical N point inversion driving mode, and N is not less than 2.
The control method of 28. such as claim 25, it is characterised in that this first inversion driving mode is that a horizontal two-dot inversion is driven
Flowing mode combines a vertical 1+N point inversion driving mode, and N is not less than 2.
The control method of 29. such as claim 25, it is characterised in that this first inversion driving mode is that a horizontal two-dot inversion is driven
Flowing mode combines a vertical N+M point inversion driving mode, and M is not less than 2 not less than 3 and N.
The control method of 30. such as claim 24, it is characterised in that this shared electrode voltage less than this first reference voltage and
During higher than this second reference voltage, this type of drive switches to this second inversion driving mode.
The control method of 31. such as claim 30, it is characterised in that this second inversion driving mode is that a normal columns reversion drives
Mode.
The control method of 32. such as claim 24, it is characterised in that also include:
A count value is added up according to this enable signal and this polarity control signal, and when this count value arrives a default value,
Switching this type of drive is a normal columns inversion driving mode, and resets this count value；
By this polarity control signal and this latch-up signal frequency elimination, to produce a frequency elimination signal；And
This enable signal of multitasking, this polarity control signal and this frequency elimination signal, to produce this polarity inversion control signal.
The control method of 33. such as claim 24, it is characterised in that also include, according to this type of drive, exporting a picture signal.
The control method of 34. such as claim 24, it is characterised in that this polarity control signal and this latch-up signal are by a sequential control
Device processed produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210474023.7A CN103839524B (en) | 2012-11-21 | 2012-11-21 | Liquid crystal display and source electrode driver thereof and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210474023.7A CN103839524B (en) | 2012-11-21 | 2012-11-21 | Liquid crystal display and source electrode driver thereof and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103839524A CN103839524A (en) | 2014-06-04 |
| CN103839524B true CN103839524B (en) | 2016-11-23 |
Family
ID=50802960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210474023.7A Expired - Fee Related CN103839524B (en) | 2012-11-21 | 2012-11-21 | Liquid crystal display and source electrode driver thereof and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103839524B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205512B (en) * | 2015-05-04 | 2019-08-23 | 奇景光电股份有限公司 | Source electrode driver |
| CN109887471A (en) * | 2019-04-08 | 2019-06-14 | 惠科股份有限公司 | The driving method of driving circuit structure, liquid crystal display panel and driving circuit structure |
| CN113593497B (en) * | 2021-07-30 | 2022-04-19 | 惠科股份有限公司 | Display panel, driving method and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1766983A (en) * | 2004-10-28 | 2006-05-03 | 恩益禧电子股份有限公司 | Liquid crystal display device and method for driving the same |
| CN101329843A (en) * | 2007-06-22 | 2008-12-24 | 群康科技(深圳)有限公司 | Liquid crystal display device and driving method thereof |
| CN102262867A (en) * | 2010-05-28 | 2011-11-30 | 乐金显示有限公司 | Liquid crystal display and method of driving the same |
| CN102629453A (en) * | 2011-05-25 | 2012-08-08 | 京东方科技集团股份有限公司 | Method for driving liquid crystal display panel in polarity-reversal mode and apparatus thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003066912A (en) * | 2001-08-22 | 2003-03-05 | Fujitsu Display Technologies Corp | Timing control circuit, picture display device, and evaluating method for the same |
| KR100859666B1 (en) * | 2002-07-22 | 2008-09-22 | 엘지디스플레이 주식회사 | Apparatus and method for driving liquid crystal display |
| KR100618853B1 (en) * | 2004-07-27 | 2006-09-01 | 삼성전자주식회사 | Control circuit and method for controlling amplifier |
| KR20070074736A (en) * | 2006-01-10 | 2007-07-18 | 삼성전자주식회사 | Liquid crystal display and driving method thereof |
| TW200805226A (en) * | 2006-07-13 | 2008-01-16 | Novatek Microelectronics Corp | Driving method for a display panel capable of generating liquid crystal AC-converting signals by setting pin levels of driving circuits and related apparatus |
| JP5035835B2 (en) * | 2007-03-01 | 2012-09-26 | ルネサスエレクトロニクス株式会社 | Display panel data side drive circuit and test method thereof |
| KR101325435B1 (en) * | 2008-12-23 | 2013-11-08 | 엘지디스플레이 주식회사 | Liquid crystal display |
| KR101578218B1 (en) * | 2009-05-13 | 2015-12-21 | 엘지디스플레이 주식회사 | Liquid crystal display and driving method thereof |
| JP5267432B2 (en) * | 2009-11-19 | 2013-08-21 | セイコーエプソン株式会社 | Liquid crystal device, driving method thereof, and electronic apparatus |
| WO2012014564A1 (en) * | 2010-07-30 | 2012-02-02 | シャープ株式会社 | Video signal line driving circuit and display device provided with same |
-
2012
- 2012-11-21 CN CN201210474023.7A patent/CN103839524B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1766983A (en) * | 2004-10-28 | 2006-05-03 | 恩益禧电子股份有限公司 | Liquid crystal display device and method for driving the same |
| CN101329843A (en) * | 2007-06-22 | 2008-12-24 | 群康科技(深圳)有限公司 | Liquid crystal display device and driving method thereof |
| CN102262867A (en) * | 2010-05-28 | 2011-11-30 | 乐金显示有限公司 | Liquid crystal display and method of driving the same |
| CN102629453A (en) * | 2011-05-25 | 2012-08-08 | 京东方科技集团股份有限公司 | Method for driving liquid crystal display panel in polarity-reversal mode and apparatus thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103839524A (en) | 2014-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101231402B (en) | Liquid crystal display panel | |
| KR102081131B1 (en) | Display Device Being Capable Of Driving In Low-Speed | |
| US9799281B2 (en) | Liquid crystal panel and driving method for the same | |
| CN106855668B (en) | Dot structure, array substrate and display panel | |
| KR102279278B1 (en) | Display Device And Driving Method for the Same | |
| CN102789771B (en) | Polarity inversion signal conversion method, device and indicating meter | |
| CN105825830B (en) | The driving method of liquid crystal display panel | |
| KR101677182B1 (en) | Method of dimming backlight assembly | |
| CN101101421A (en) | Liquid crystal display device and driving method of liquid crystal display device | |
| CN109785803B (en) | Display method, display unit and display | |
| CN103348405B (en) | Display device and driving method | |
| CN104992676B (en) | Driving voltage control method and device, array base palte, display device | |
| CN101609651B (en) | Method and device for driving voltage polarity reversal by liquid crystal panel | |
| CN101587685A (en) | Liquid crystal display (LCD) device and driving method thereof | |
| CN106023939A (en) | Liquid crystal display and driving method thereof | |
| CN102968971A (en) | Liquid crystal display driving method, time sequence control device and liquid crystal display device | |
| CN100347739C (en) | Data-holding display device and drive method and TV receiver | |
| CN103839524B (en) | Liquid crystal display and source electrode driver thereof and control method | |
| CN104464678A (en) | Liquid crystal display device and driving method thereof | |
| US10339881B1 (en) | Method of acquiring overdrive look-up table of liquid crystal display | |
| JP6632119B2 (en) | Transflective liquid crystal panel | |
| CN102214450A (en) | Liquid crystal display and driving method thereof | |
| CN101853640B (en) | Display device and refresh rate modulation method thereof | |
| CN101614919A (en) | Field order LCD device and driving method thereof | |
| CN103065600B (en) | Select the method for FRC pattern |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20211121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |