CN106856089A - A kind of scanning drive method suitable for cholesteric liquid crystal display device - Google Patents
A kind of scanning drive method suitable for cholesteric liquid crystal display device Download PDFInfo
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- CN106856089A CN106856089A CN201710098310.5A CN201710098310A CN106856089A CN 106856089 A CN106856089 A CN 106856089A CN 201710098310 A CN201710098310 A CN 201710098310A CN 106856089 A CN106856089 A CN 106856089A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
Abstract
The invention discloses a kind of scanning drive method suitable for cholesteric liquid crystal display device, including emptying step and scanning refresh step for removing the display image on the cholesteric liquid crystal display device, the scanning refresh step is progressively scanned using 4 state scan modes, when certain COM electrode in choosing, apply COM electrode scan line waveforms on the COM electrodes, it is synchronous to apply data-signal as needed on SEG electrodes, the data-signal includes SEG electrode dark-state waveforms and SEG electrode on state of waveforms, under two kinds of SEG electrode data signal functions, complete to select the pixel status for choosing COM rows；Scanning refresh step is performed repeatedly, and image is complete to be shown on the cholesteric liquid crystal display device.The present invention can complete low cost, super low-power consumption, ultra-wide temperature working range, the driving of the cholesteric phase display device of good display effect.
Description
Technical field
The present invention relates to liquid crystal display device and the driving method of the device, very-low-pover displays industry is applied to, such as
Electronic Paper industry, electronic tag industry, super low-power consumption presentation of information industry is particularly related to a kind of suitable for cholesteric liquid crystal
The scanning drive method of display device.
Background technology
Cholesteric liquid crystal display screen is the one kind in current main flow LCDs, and cholesteric phase is because it derives from cholesterine
Derivative and gain the name, such liquid crystal molecule be in flat, arrange stratification, molecule is parallel to each other in layer, molecular long axis parallel to
Layer plane, the molecular long axis direction of different layers is varied slightly, and helicoidal structure is arranged in along the normal direction of layer.Cholesteric liquid crystal
The pitch of thread be about 300nm, and the same magnitude of visible wavelength, this spiral away from can with ambient temperature, current field condition it is different and
Change, thus the method for available adjustment pitch light is modulated to external world.Cholesteric liquid crystal is particularly useful in Display Technique, its
The additive of nematic liquid crystal is largely used to, can guide liquid crystal in liquid crystal cell along 180 °, 270 ° etc. of face aligned twisted, formed
Supertwist (STN) shows.In recent years, people utilize optical activity, selective, the light scattering, color of circular polarization two of cholesteric liquid crystal
The feature developments such as property have gone out various new display device.
At present, the scanning drive method that cholesteric liquid crystal display screen is used substantially has following three kinds：FCR, DDS, two-value ripple
Shape scanning drive method and tri-state turntable driving waveform display method.
Wherein, FCR driving methods, are driven into FC states, in the method for scanning to P states, it is also possible to realize courage using first whole screen
The driving of steroid phase liquid crystal display device, but due to using existing STN driving chips, its output voltage range is smaller, it is impossible to it is enough
Ghost phenomena is eliminated well, it is necessary to carrying out plane replacement, two kinds of reset modes of the burnt replacement of cone in the replacement phase could weaken ghost
Phenomenon, but ghost phenomena can not be thoroughly eliminated, the present invention can be exported using special high-pressure driving chip and drive core than traditional STN
The broader voltage range of piece, it is possible to achieve high-tension plane resets, and can thoroughly eliminate ghost phenomena.
DDS driving methods, type of drive is extremely complex, at least 5 road voltages is exported simultaneously to driving chip requirement, during control
Sequence is complicated, is not suitable for cost drive.
Although bilevel waveform driving method output voltage quantity is less, too big burden will not be carried out to chip belt, exactly by
In waveform combination, the method is suitable only for being driven display at normal temperatures very little, is not suitable for driving cholesteric phase in wide temperature range
Liquid crystal display device.
, there is operating temperature range (- 10 DEG C to 70 DEG C) not wide enough and be difficult to meet -25 DEG C in tri-state turntable driving waveform display method
Freezing occasion use, while the power consumption of the method sweep phase is larger, while there is row cumulative effect in the method sweep phase
Influence display effect.
Therefore, the present inventor needs a kind of new technology of design badly to improve its problem.
The content of the invention
The present invention is intended to provide a kind of scanning drive method suitable for cholesteric liquid crystal display device, it can eliminate and sweep
Row cumulative effect during retouching, improves image hour effect, while having super low-power consumption to scan feature, meets very much to electric power
It is required that high product.
In order to solve the above technical problems, the technical scheme is that：
A kind of scanning drive method suitable for cholesteric liquid crystal display device, comprises the following steps：
Emptying step：Display image on the cholesteric liquid crystal display device is removed using subregion emptying method；
Scanning refresh step：Progressively scanned using 4 state scan modes, when certain COM electrode in choosing, in the COM
Apply COM electrode scan line waveforms on electrode, synchronous to apply data-signal as needed on SEG electrodes, the data-signal bag
SEG electrode dark-state waveforms and SEG electrode on state of waveforms are included, under two kinds of SEG electrode data signal functions, is completed to choosing COM
Capable pixel status selection；
Scanning refresh step is performed repeatedly, and image is complete to be shown on the cholesteric liquid crystal display device.
Preferably, the emptying step is specifically included：
Region division is carried out, then to applying anti-phase on each all COM electrodes emptied in region, all SEG electrodes
Amplitude empty waveform for the high pressure of V5, the generating positive and negative voltage that amplitude is V5 will be now applied on liquid crystal pixel, make in the voltage
Under so that liquid crystal arrangement is changed into the P states in the arrangement of electrode surface Vertical Uniform, the arrangement produces cloth to the visible ray of specific waveforms
Glug reflects, and on state of is presented.
Preferably, the scanning refresh step is specifically included：
Applying COM electrode scan line waveforms on COM electrodes are being chosen, it is synchronous to apply SEG electrode dark-state ripples on SEG electrodes
During shape, the waveform of the pixel is the positive negative wave that an amplitude is (V4-V1), and under waveform effect, liquid crystal is changed into FC from P states
State, is rendered as dark-state；
Applying COM electrode scan line waveforms on COM electrodes are being chosen, it is synchronous to apply SEG electrode on state of ripples on SEG electrodes
During shape, the waveform of the pixel is the waveform that an amplitude is (V4-V1)/3, and under waveform effect, liquid crystal keeps P states.
Preferably, the scanning refresh step also includes：
Apply the non-selected waveform of COM electrodes on unselected COM electrodes, its range value is V2 and V3, unselected COM electrodes
On pixel waveforms voltage magnitude for (V4-V1) voltage magnitude 1/3, because the amplitude changes much smaller than mesomorphic state
Voltage threshold, so the pixel status on unselected COM electrodes will not change, that is, the pixel for being initially on state of keeps bright
State, the pixel for being initially dark-state keeps dark-state.
Preferably, V1<V2<V3<V4<V5.
Preferably, V4-V3=V3-V2=V2-V1.
Preferably, the high pressure empties waveform for square wave, and between 1HZ-50HZ, pulse at 1 to arriving for its waveform frequency
Between 200.
Preferably, the COM electrodes scan line waveform and/or the SEG electrodes dark-state waveform and/or the SEG electrodes
On state of waveform is square wave.
Preferably, the COM electrodes scan line waveform and/or the SEG electrodes dark-state waveform and/or the SEG electrodes
Between 100HZ-20KHZ, pulse is between 1 to 200 on state of waveform frequency.
Preferably, the non-selected waveform is AC wave shape, and between 100HZ-20KHZ, pulse is to 1 for its waveform frequency
Between individual to 200.
Using above-mentioned technical proposal, the present invention at least includes following beneficial effect：
Scanning drive method suitable for cholesteric liquid crystal display device of the present invention, using four state scan method solutions
The problem that cholesteric liquid crystal display device of having determined progressive scan display drives, with low cost, super low-power consumption, the work of ultra-wide temperature
The advantages of scope (operating temperature range is extended to -40 DEG C to 80 DEG C), good display effect.
Brief description of the drawings
Fig. 1 is the flow chart of the scanning drive method suitable for cholesteric liquid crystal display device of the present invention；
Fig. 2 empties oscillogram for COM electrodes high pressure of the present invention；
Fig. 3 empties oscillogram for SEG electrodes high pressure of the present invention；
Fig. 4 is COM electrodes scan line oscillogram of the present invention；
Fig. 5 is the non-selected oscillogram of COM electrodes of the present invention；
Fig. 6 is SEG electrodes dark-state oscillogram of the present invention；
Fig. 7 is SEG electrodes on state of oscillogram of the present invention；
Fig. 8 is 4 state turntable driving oscillograms described in an embodiment；
Fig. 9 is that on state of (P states) pixel liquid crystal arranges schematic diagram；
Figure 10 is arranged for dark-state (FC states) pixel liquid crystal.
Wherein：1. the first base layer, 2. the second base layer, 3. mixed layer.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in Figures 1 to 10, to meet a kind of turntable driving suitable for cholesteric liquid crystal display device of the invention
Method, comprises the following steps：
Emptying step：Display image on the cholesteric liquid crystal display device is removed using subregion emptying method；
Scanning refresh step：Progressively scanned using 4 state scan modes (wave-shape amplitude include 4 states), in being elected to certain
During COM electrodes, COM electrode scan line waveforms are applied on the COM electrodes, it is synchronous to apply data as needed on SEG electrodes
Signal, the data-signal includes SEG electrode dark-state waveforms and SEG electrode on state of waveforms, in two kinds of SEG electrode data signal functions
Under, complete to select the pixel status for choosing COM rows；
Scanning refresh step is performed repeatedly, and image is complete to be shown on the cholesteric liquid crystal display device.
Preferably, the emptying step is specifically included：
Apply the high pressure that anti-phase amplitude is V5 on all COM electrodes, all SEG electrodes and empty waveform, now liquid crystal
The generating positive and negative voltage that amplitude is V5 will be applied in pixel, under voltage effect, liquid crystal arrangement is changed into electrode surface Vertical Uniform
The P states of arrangement, the arrangement produces Bragg reflection to the visible ray of specific waveforms, and on state of is presented.
Preferably, the scanning refresh step is specifically included：
Region division is carried out, traveling wave then is scanned to each applying COM electrodes on COM electrodes of choosing emptied in region
Shape, when synchronously applying SEG electrode dark-state waveforms on SEG electrodes, the waveform of the pixel is that an amplitude is the positive negative wave of (V4-V1)
Shape, under waveform effect so that liquid crystal is changed into FC states from P states, is rendered as dark-state；
Applying COM electrode scan line waveforms on COM electrodes are being chosen, it is synchronous to apply SEG electrode on state of ripples on SEG electrodes
During shape, the waveform of the pixel is the waveform that an amplitude is (V4-V1)/3, and under waveform effect, liquid crystal keeps P states.
Preferably, the scanning refresh step also includes：
Apply the non-selected waveform of COM electrodes on unselected COM electrodes, its range value is V2 and V3, unselected COM electrodes
On pixel waveforms voltage magnitude for (V4-V1) voltage magnitude 1/3, because the amplitude changes much smaller than mesomorphic state
Voltage threshold, so the pixel status on unselected COM electrodes will not change, that is, the pixel for being initially on state of keeps bright
State, the pixel for being initially dark-state keeps dark-state.
Preferably, V1<V2<V3<V4<V5.
Preferably, V4-V3=V3-V2=V2-V1.
Preferably, the high pressure empties waveform for square wave, and between 1HZ-50HZ, pulse at 1 to arriving for its waveform frequency
Between 200.
Preferably, the COM electrodes scan line waveform and/or the SEG electrodes dark-state waveform and/or the SEG electrodes
On state of waveform is square wave.
Preferably, the COM electrodes scan line waveform and/or the SEG electrodes dark-state waveform and/or the SEG electrodes
Between 100HZ-20KHZ, pulse is between 1 to 200 on state of waveform frequency.
Preferably, the non-selected waveform is AC wave shape, and between 100HZ-20KHZ, pulse is to 1 for its waveform frequency
Between individual to 200.
It should be added that, the driving method is used for cholesteric liquid crystal display screen, the cholesteric liquid crystal display screen bag
First, second base layer is included, mixed layer 3 is provided between first base layer 1 and second base layer 2, the mixed layer 3 is by cholesteric
Phase liquid crystal and conducting objects are constituted, and first base layer 1 is provided with the first conductive electrode layer towards the side of the mixed layer, and this second
Base layer 2 is provided with the second conductive electrode layer towards the side of the mixed layer 3, and first conductive electrode layer is arranged in parallel by multiple
Row electrode is constituted, and second conductive electrode layer is made up of multiple row electrodes arranged in parallel, and the row electrode is with row electrode phase just
Hand over and form pixel-matrix array structure.Because cholesteric liquid crystal display screen is electronic display unit known in the art, therefore it has
Body is constituted and not described in detail herein.
Operation principle of the invention is：It is divided into 2 stages, respectively emptying phase and scanning refreshed image stage.Clearly
The empty stage applies the HT waveform that anti-phase amplitude is V5 on all COM electrodes, all SEG electrodes, now on liquid crystal pixel
The generating positive and negative voltage that amplitude is V5 will be applied in, under voltage effect, liquid crystal arrangement is changed into the P in the arrangement of electrode surface Vertical Uniform
State, the arrangement produces Bragg reflection to the visible ray of specific waveforms, and on state of is presented.The voltage V5 of emptying phase is higher, can be with
The residual of upper piece image is wiped well.Preferably, in emptying phase, in units of row electrode, all row electrodes are divided into
Multiple regions, empty respectively to regional, wherein, each region is emptied with reference to as above step.Wherein for region
Division methods those skilled in the art can be adjusted correspondingly according to actual use demand, it is above-mentioned be intended to for example,
It is not intended to limit, any obvious form change and adjustment are within the protection domain of the present embodiment.
The scanning refreshed image stage chooses COM electrodes line by line, when certain COM electrode in choosing, COM is applied on this electrode
Electrode scan line waveform, while applying COM electrode Non-scanning mode traveling wave shapes on other electrodes, it is synchronous to apply signal with COM electrodes
Apply data-signal on SEG electrodes, choose and needed on COM electrodes on the corresponding SEG electrodes of the pixel for being shown as dark-state at this
Apply SEG electrode dark-state waveforms, liquid crystal arrangement is changed into disordered chain state FC states, it is impossible to form Bragg reflection and dark-state is presented,
The corresponding SEG electrodes of the pixel for being shown as on state of are being needed to apply SEG electrode on state of waveforms, liquid crystal arrangement keeps constant, still
Bragg reflection can be carried out on state of is presented, under two kinds of SEG electrode data signal functions, complete the pixel to choosing COM rows
Condition selecting.Specifically, applying COM electrode scan line waveforms on COM electrodes are chosen, it is synchronous to apply SEG electrodes on SEG electrodes
During dark-state waveform, the waveform of the pixel is the positive negative wave that an amplitude is (V4-V1), and under waveform effect, liquid crystal becomes from P states
It is FC states (as shown in Figure 10), it is dark-state to cash.Applying COM electrode scan line waveforms on COM electrodes are chosen, it is synchronous in SEG electricity
When extremely above applying SEG electrode on state of waveforms, the waveform of the pixel is the waveform that an amplitude is (V4-V1)/3, in waveform effect
Under, liquid crystal keeps P states (as shown in Figure 9).Apply the non-selected waveform of COM electrodes on non-selected COM electrodes, the waveform is waves AC
Shape, its range value is V2 and V3, and the voltage magnitude of the pixel waveforms on non-selection COM electrodes is the 1/ of (V4-V1) voltage magnitude
3, because the amplitude is much smaller than the voltage threshold that mesomorphic state changes, so the pixel status on non-selected COM electrodes are not
Can change, and be initially the pixel holding on state of of on state of, the pixel for being initially dark-state keeps dark-state.
Progressive scan process is performed repeatedly, and what image can be complete shows on the display screen.
Reference picture 8, pixel voltage is as shown in table 1 below during its scanning 1 row of display：
Table 1 (T1)
| SEG1 | SEG2 | SEG3 | |
| COM1 | (V4-V1)/3 | (V4-V1) | (V4-V1)/3 |
| COM2 | (V4-V1)/3 | (V4-V1)/3 | (V4-V1)/3 |
| COM3 | (V4-V1)/3 | (V4-V1)/3 | (V4-V1)/3 |
Pixel voltage is as shown in table 2 below during its scanning 2 row of display：
Table 2 (T2)
| SEG1 | SEG2 | SEG3 | |
| COM1 | (V4-V1)/3 | (V4-V1)/3 | (V4-V1)/3 |
| COM2 | (V4-V1) | (V4-V1)/3 | (V4-V1)/3 |
| COM3 | (V4-V1)/3 | (V4-V1)/3 | (V4-V1)/3 |
Pixel voltage is as shown in table 3 below during its scanning 3 row of display：
Table 3 (T3)
| SEG1 | SEG2 | SEG3 | |
| COM1 | (V4-V1)/3 | (V4-V1)/3 | (V4-V1)/3 |
| COM2 | (V4-V1)/3 | (V4-V1)/3 | (V4-V1)/3 |
| COM3 | (V4-V1)/3 | (V4-V1)/3 | (V4-V1) |
In the present embodiment, V1 is met in the drive waveforms<V2<V3<V4<The requirement of V5, V1, V2, V3, V4 can be just
Voltage, or negative voltage, or 0 voltage, such as V1=-8V, V2=-4V, V3=4V, V4=8V, as long as meeting
The requirement of V4-V3=V3-V2=V2-V1.When V1 is equal to 0V, all voltages of V2, V3, V4, V5 are all positive voltage, scan rank
The pixel voltage of section on state of pixel is always 1/3rd of V4 voltage amplitude values.The frequency of emptying phase waveform in the drive waveforms
From 1HZ-50HZ adjustable (preferably, can be 1Hz, 10Hz, 50Hz), pulse (preferably, can be rate to adjustable from 1 to 200
1,100,200), sweep phase waveform frequency from 100HZ-20KHZ it is adjustable (preferably, can for 100Hz, 4kHz,
50kHz, 20KHZ), pulse is to (preferably, can be 1,100,200) adjustable from 1 to 200.
The voltage integrating meter that the drive waveforms meet the emptying phase of each pixel is 0, the voltage integrating meter in image scanning stage
It is 0.The row cumulative effect in scanning process is eliminated, image hour effect is improved, the waveform is driven higher resolution
Cholesterol display screen.There is super low-power consumption to scan feature for it, meet very much the product high to electrical power demand.
The present invention solves the problems, such as the afterimage of image of FCR methods not easy-clear, while using subregion emptying method more
High current problem during full frame emptying is mended；The present invention uses 4 state scan methods, has voltage way few than DDS driving methods,
Drive the advantage of low cost；The present invention has broader operating temperature range than two-value driving method, is adapted in various temperature rings
Cholesteric liquid crystal display device is driven under border well；The present invention has broader operating temperature than 3 state turntable driving Waveform Methods
Scope, lower scanning work electric current eliminates the more preferable display effect after row cumulative effect；The present invention can complete it is low into
Sheet, super low-power consumption, ultra-wide temperature working range (operating temperature range is extended to -40 DEG C to 80 DEG C), the courage of good display effect
The driving of steroid phase liquid crystal display device.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (10)
1. a kind of scanning drive method suitable for cholesteric liquid crystal display device, it is characterised in that comprise the following steps：
Emptying step：Display image on the cholesteric liquid crystal display device is removed using subregion emptying method；
Scanning refresh step：Progressively scanned using 4 state scan modes, when certain COM electrode in choosing, in the COM electrodes
Upper applying COM electrode scan line waveforms, synchronous to apply data-signal as needed on SEG electrodes, the data-signal includes SEG
Electrode dark-state waveform and SEG electrode on state of waveforms, under two kinds of SEG electrode data signal functions, complete the picture to choosing COM rows
Plain condition selecting；
Scanning refresh step is performed repeatedly, and image is complete to be shown on the cholesteric liquid crystal display device.
2. as claimed in claim 1 suitable for the scanning drive method of cholesteric liquid crystal display device, it is characterised in that described
Emptying step is specifically included：
Region division is carried out, then to applying anti-phase width on each all COM electrodes emptied in region, all SEG electrodes
It is worth for the high pressure of V5 empties waveform, the generating positive and negative voltage that amplitude is V5 will be now applied on liquid crystal pixel, under voltage effect,
So that liquid crystal arrangement is changed into the P states in the arrangement of electrode surface Vertical Uniform, the arrangement produces Prague to the visible ray of specific waveforms
Reflection, is presented on state of.
3. as claimed in claim 1 or 2 suitable for the scanning drive method of cholesteric liquid crystal display device, it is characterised in that
The scanning refresh step is specifically included：
Applying COM electrode scan line waveforms on COM electrodes are being chosen, it is synchronous to apply SEG electrode dark-state waveforms on SEG electrodes
When, the waveform of the pixel is the positive negative wave that an amplitude is (V4-V1), and under waveform effect, liquid crystal is changed into FC states from P states,
It is rendered as dark-state；
Applying COM electrode scan line waveforms on COM electrodes are being chosen, it is synchronous to apply SEG electrode on state of waveforms on SEG electrodes
When, the waveform of the pixel is the positive negative wave that an amplitude is (V4-V1)/3, and under waveform effect, liquid crystal keeps P states.
4. the scanning drive method suitable for cholesteric liquid crystal display device as described in right wants 3, it is characterised in that described to sweep
Retouching refresh step also includes：
Apply the non-selected waveform of COM electrodes on unselected COM electrodes, its range value is V2 and V3, on unselected COM electrodes
The voltage magnitude of pixel waveforms is the 1/3 of (V4-V1) voltage magnitude, because the amplitude is much smaller than the electricity that mesomorphic state changes
Pressure threshold value, so the pixel status on unselected COM electrodes will not change, that is, the pixel for being initially on state of keeps on state of,
The pixel for being initially dark-state keeps dark-state.
5. as claimed in claim 4 suitable for the scanning drive method of cholesteric liquid crystal display device, it is characterised in that：V1<
V2<V3<V4<V5。
6. as claimed in claim 4 suitable for the scanning drive method of cholesteric liquid crystal display device, it is characterised in that：V4-
V3=V3-V2=V2-V1.
7. as claimed in claim 2 suitable for the scanning drive method of cholesteric liquid crystal display device, it is characterised in that：It is described
High pressure empties waveform for square wave, and between 1HZ-50HZ, pulse is between 1 to 200 for its waveform frequency.
8. as claimed in claim 3 suitable for the scanning drive method of cholesteric liquid crystal display device, it is characterised in that：It is described
COM electrode scan line waveforms and/or the SEG electrodes dark-state waveform and/or the SEG electrodes on state of waveform are square wave.
9. as claimed in claim 8 suitable for the scanning drive method of cholesteric liquid crystal display device, it is characterised in that：It is described
COM electrode scan line waveforms and/or the SEG electrodes dark-state waveform and/or the SEG electrodes on state of waveform frequency are in 100HZ-
Between 20KHZ, pulse is between 1 to 200.
10. as claimed in claim 4 suitable for the scanning drive method of cholesteric liquid crystal display device, it is characterised in that：Institute
Non-selected waveform is stated for AC wave shape, between 100HZ-20KHZ, pulse is between 1 to 200 for its waveform frequency.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247619A (en) * | 1997-01-08 | 2000-03-15 | 先进显示体系股份有限公司 | Appts. for and method of driving cholesteric liquid crystal flat panel display with initial setting into nematic state |
| US20070085788A1 (en) * | 2005-10-18 | 2007-04-19 | Fuji Xerox Co., Ltd | Method for driving optical address type spatial light modulation device and apparatus for driving optical address type spatial light modulation device |
| US20110122115A1 (en) * | 2009-11-26 | 2011-05-26 | Fujitsu Limited | Reflection-type display apparatus |
| CN104658490A (en) * | 2013-11-25 | 2015-05-27 | 苏州汉朗光电有限公司 | Scanning driving method for cholesteric liquid crystal display screen |
-
2017
- 2017-02-22 CN CN201710098310.5A patent/CN106856089A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247619A (en) * | 1997-01-08 | 2000-03-15 | 先进显示体系股份有限公司 | Appts. for and method of driving cholesteric liquid crystal flat panel display with initial setting into nematic state |
| US20070085788A1 (en) * | 2005-10-18 | 2007-04-19 | Fuji Xerox Co., Ltd | Method for driving optical address type spatial light modulation device and apparatus for driving optical address type spatial light modulation device |
| US20110122115A1 (en) * | 2009-11-26 | 2011-05-26 | Fujitsu Limited | Reflection-type display apparatus |
| CN104658490A (en) * | 2013-11-25 | 2015-05-27 | 苏州汉朗光电有限公司 | Scanning driving method for cholesteric liquid crystal display screen |
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