CN105405411B - A kind of display drive method and system of 16 rank electrophoretic display device (EPD) - Google Patents
A kind of display drive method and system of 16 rank electrophoretic display device (EPD) Download PDFInfo
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Abstract
The invention discloses a kind of display drive method and system of 16 rank electrophoretic display device (EPD).Comprise the following steps：A, display controller receives GTG display command, calls waveform inquiry table；B, the shape information of GTG is passed to driving electrodes controller by display controller according to GTG display command；C, driving electrodes controller receives the shape information of GTG, applies the voltage that DC balance corresponding with GTG to be wiped recovers waveform to pixel by driving electrodes, driving pixel movement, returns to basic GTG；D, driving electrodes controller is after completing to wipe, and according to the shape information of GTG, the voltage for applying suitable GTG drive waveforms by driving electrodes writes with a brush dipped in Chinese ink new GTG.The present invention is improved GTG exponent number, is realized and improve the display effect of electrophoretic display device (EPD) GTG by the GTG driving method.In accordance with DC balance principle, it effectively prevent driving electrodes and display medium and damaged caused by residual voltage accumulates.
Description
Technical field
The present invention relates to a kind of display drive method and system of 16 rank electrophoretic display device (EPD), belong to electrophoretic techniques field.
Background technology
Electrophoretic display turns into important Electronic Paper Display Technique, compared with other Display Techniques, has ultralow
The advantages of power consumption, therefore electrophoretic display technology is widely used.There is two kinds of particles in microcapsules：Black particle and white particle.
White particle is controlled by negative electrical charge, and black particle is controlled by positive charge.So when pixel electrode provides negative voltage electrophoretic display device (EPD)
Display white, and then show black during positive voltage driving.Electrophoretic display device (EPD) needs an active matrix rear panel, in order to drive electrophoresis
Particle realizes the correct display of GTG, applies suitable drive waveforms on electrode.So far, had much have it is powered-down
The research for the drive waveforms shown of swimming.
At present, 4 rank GTGs (black, dark-grey, light gray, white) Display Technique relative maturity, various drive waveforms methods
It is suggested in succession.A kind of preferably drive waveforms are that in an inquiry table, compilation and design goes out 4x4=16 all GTGs
Converted-wave.Similar black → black, black → light gray → black, black → light gray → dark-grey → black grade waveform, referred to as closed loop GTG converted wave
Shape.In each closed loop GTG converted-wave, in accordance with DC balance principle, to avoid the damage of driving electrodes and display medium
It is bad.This waveform, which includes, wipes and drives two stages, the reference GTG using black grey scale as the erasing stage.
Disclosed electrophoretic screens Display Technique is substantially at this stage shows for 4 rank GTGs, picture GTG richness and clear
Clear degree has much room for improvement.Relative to 4 rank GTGs, the design of 16 rank GTGs makes every one-level GTG interval diminish, and display effect is finer and smoother, shows
Show that picture is apparent, pixel composition is more rich, and grayscale contrast becomes apparent from.With the image frame pair of 16 rank gray scale techniques driving display
There is a very big improvement than the picture of 4 rank gray scale techniques driving, the comfort of viewing also greatly improves.But due to each ash
Rank interval diminishes, and gray level accuracy is difficult control, and should not design 16x16=256 all GTG converted-waves.According to
For above-mentioned 4 rank driving method, it is necessary to design 256 converted-waves, quantity is excessive unrealistic.
Because being 16 rank GTGs, DC balance problem can become complicated a lot.If it cannot be guaranteed that DC balance, then
In GTG transfer process, just have residual voltage and produce and accumulate, destruction, display picture are produced to driving electrodes and display medium
Can gradually it turn yellow dimmed.In the course of time, will breakdown electrode when residual voltage is excessive.Display life is greatly reduced.
The content of the invention
To solve the defects of prior art is present, the present invention provides a kind of display drive method of 16 rank electrophoretic display device (EPD),
Comprise the following steps：
A, display controller receives GTG display command, calls waveform inquiry table, and wherein waveform inquiry table is used to store 16
Rank GTG waveform；B, the shape information of GTG is passed to driving electrodes controller according to GTG display command by display controller,
Wherein the shape information of GTG includes the drive waveforms that DC balance corresponding to GTG to be wiped recovers waveform and GTG to be shown；
C, driving electrodes controller receives the shape information of GTG, applies DC balance corresponding with GTG to be wiped by driving electrodes
Recover the voltage of waveform to wipe GTG；D, driving electrodes controller is believed after completing to wipe GTG according to the waveform of GTG
Breath, the voltage for applying suitable GTG drive waveforms by driving electrodes write with a brush dipped in Chinese ink new GTG.
Further, before the A of the step, it is necessary to pre-set waveform inquiry table, including：GTG code name：It is a total of
16 rank GTGs, from 0 rank to 15 ranks, wherein 0 rank represents maximum black GTG, 15 ranks represent maximum white GTG；Basic GTG：If
GTG based on fixed 0 rank；Waveform：16 rank GTGs respectively there is respective DC balance to recover waveform and GTG drive waveforms.
Further, DC balance described in step B recovers waveform, and DC balance is realized by the following method：Electrode exists
During ith GTG drives and i+1 time GTG wipes, apply positive voltage be equal to total time apply negative voltage it is total when
Between.
Further, driving electrodes voltage is arranged to 15V to realize display driving.
Further, the step C wipes the process of GTG, including：GTG changes n ranks into m ranks, and DC balance recovers
Waveform drives the GTG of pixel to transform to 15 ranks from n ranks by the change of voltage, then transforms to 0 rank from 15 ranks, that is, drives picture
Element makes its grey scale transformation to basic GTG.
Further, the voltage of the step C is arranged to turn to positive voltage by negative voltage, to ensure black state as base
Plinth color range.
Further, step D writes with a brush dipped in Chinese ink new GTG using negative voltage.
Beneficial effects of the present invention are：By the GTG driving method, GTG exponent number is improved, realizes and improves electricity
The display effect of phoretic display GTG, reduce overall driving time.In accordance with DC balance principle, driving electrodes are effectively prevent
And display medium damages caused by residual voltage accumulates.
Brief description of the drawings
Fig. 1 show flow chart of the method for the present invention；
The DC balance that Fig. 2 show 16 rank GTGs recovers waveform table；
Fig. 3 show the drive waveforms table of 16 rank GTGs；
Fig. 4 show the schematic diagram that GTG n ranks are changed to GTG m ranks；
Fig. 5 show the schematic diagram that DC balance is realized in the conversion of closed loop GTG.
Embodiment
According to the first embodiment of the present invention, a kind of display drive method of 16 rank electrophoretic display device (EPD) as shown in Figure 1, including
Following steps：
A, display controller receives GTG display command, calls waveform inquiry table, and wherein waveform inquiry table is used to store 16
Rank GTG waveform；
B, the shape information of GTG is passed to driving electrodes controller according to GTG display command by display controller, its
The shape information of middle GTG includes the drive waveforms that DC balance corresponding to GTG to be wiped recovers waveform and GTG to be shown；
C, driving electrodes controller receives the shape information of GTG, and pixel is applied and GTG to be wiped by driving electrodes
Corresponding DC balance recovers the voltage of waveform, driving pixel movement, returns to basic GTG, to reach the mesh for wiping GTG
's；
D, driving electrodes controller, according to the shape information of GTG, is applied after completing to wipe GTG by driving electrodes
The voltage of suitable GTG drive waveforms is added to write with a brush dipped in Chinese ink new GTG.
, it is necessary to pre-set waveform inquiry table before the A of step, including GTG code name, a total of 16 rank GTG, from 0 rank
To 15 ranks, wherein 0 rank represents maximum black GTG, 15 ranks represent maximum white GTG；Basic GTG, set ash based on 0 rank
Rank, the i.e. GTG as a starting point in conversion process, can also similarly set GTG based on 15 ranks；Waveform：16 ranks ash
Rank respectively there is respective DC balance to recover waveform and GTG drive waveforms.
According to the second embodiment of the present invention, the waveform table of a waveform inquiry table editted, including it is straight as shown in Figure 2
Mobile equilibrium recovers waveform table and GTG drive waveforms table as shown in Figure 3, DC balance recover waveform play recover DC balance with
And the active effect of black and white particle in activation display medium, drive waveforms are used to drive pixel to target gray scale.
According to the third embodiment of the invention, DC balance described in step B recovers waveform, is realized by the following method straight
Mobile equilibrium：Electrode is kept during the wiping of voltage and i+1 time GTG conversion in the driving stage that ith GTG is changed
Generating positive and negative voltage DC balance, i.e., the total time of positive voltage it is equal to the total time for applying negative voltage applied in two benches process.
Driving electrodes voltage is arranged to 15V to realize display driving.
As shown in figure 4, step C wipes the process of GTG, including：
GTG changes n ranks into m ranks, and DC balance recovers waveform drives the GTG of pixel from n ranks by the change of voltage
15 ranks are transformed to, then transform to 0 rank from 15 ranks, that is, drive pixel to make its grey scale transformation to basic GTG.
As shown in figure 5, realize that overall current balances in GTG transfer process：N ranks → m ranks conversion, first call direct current to put down
The DC balance that weighing apparatus recovers n rank waveforms in waveform table recovers waveform, to be driven in a GTG transfer process before balance to n ranks institute
The non-equilibrium voltage left；Then the GTG drive waveforms of m ranks waveform in drive waveforms table are recalled, can now leave this ash
The non-equilibrium voltage of rank drive waveforms, when GTG next time is changed call DC balance recover waveform table in m rank waveforms it is straight
Mobile equilibrium recovers waveform to keep DC balance.If conversion next time is to reach n ranks, returns to initial GTG formation one and close
Ring, then it is clear that this whole closed loop GTG transfer process integrally observes DC balance, avoid the generation product of residual voltage
It is tired, driving electrodes and display medium are protected, extends its service life.
Step C voltage is arranged to turn to positive voltage by negative voltage, the color range based on ensureing black state, in addition when
When basic GTG is maximum white GTG, voltage is arranged to positive voltage and turns to negative voltage.
Step D writes with a brush dipped in Chinese ink new GTG using negative voltage, in addition when basic GTG is maximum white GTG, using positive electricity
Press to write with a brush dipped in Chinese ink new GTG.
According to the fourth embodiment of the invention, the display driving system of the display driving of a kind of 16 rank electrophoretic display device (EPD), bag
Include：
Display input device, it is configured to make display controller receive GTG display command, calls waveform inquiry table, its medium wave
Shape inquiry table is used to store 16 rank GTG waveforms；
Display control unit, it is configured to make display controller according to GTG display command, by the shape information transmission of GTG
Driving electrodes controller is given, the wherein shape information of GTG includes DC balance recovery waveform corresponding to GTG to be wiped and waits to show
Show the drive waveforms of GTG；
Driving electrodes wiping arrangement, the shape information for making driving electrodes controller receive GTG is configured to, by driving electricity
Pole applies the voltage of corresponding with GTG to be wiped DC balance recovery waveform to wipe GTG；
Driving electrodes drive device, it is configured to make driving electrodes controller after completing to wipe GTG, according to GTG
Shape information, the voltage for applying suitable GTG drive waveforms by driving electrodes write with a brush dipped in Chinese ink new GTG.
It is described above, simply presently preferred embodiments of the present invention, the invention is not limited in above-mentioned embodiment, as long as
It reaches the technique effect of the present invention with identical means, should all belong to protection scope of the present invention.In the protection model of the present invention
Its technical scheme and/or embodiment can have a variety of modifications and variations in enclosing.
Claims (7)
1. a kind of display drive method of 16 rank electrophoretic display device (EPD), it is characterised in that comprise the following steps：
A, display controller receives GTG display command, calls waveform inquiry table, and wherein waveform inquiry table is used to store 16 ranks ash
Rank waveform；
B, the shape information of GTG is passed to driving electrodes controller, wherein ash by display controller according to GTG display command
The shape information of rank includes the drive waveforms that DC balance corresponding to GTG to be wiped recovers waveform and GTG to be shown, wherein,
DC balance recovers waveform and is based on electrode during the driving of ith GTG and i+1 time GTG wipe, and applies positive electricity
Be equal to application negative voltage the total time of pressure realizes DC balance total time；
C, driving electrodes controller receives the shape information of GTG, applies direct current corresponding with GTG to be wiped by driving electrodes
The voltage of integrated compensation waveform is to wipe GTG；
D, driving electrodes controller, according to the shape information of GTG, is applied by driving electrodes and closed after completing to wipe GTG
The voltage of suitable GTG drive waveforms writes with a brush dipped in Chinese ink new GTG.
2. a kind of display drive method of 16 rank electrophoretic display device (EPD) according to claim 1, it is characterised in that the step
, it is necessary to pre-set waveform inquiry table before A, including：
GTG code name：A total of 16 rank GTG, from 0 rank to 15 ranks, wherein 0 rank represents maximum black GTG, 15 ranks represent maximum
White GTG；
Basic GTG：Set GTG based on 0 rank；
Waveform：16 rank GTGs respectively there is respective DC balance to recover waveform and GTG drive waveforms.
A kind of 3. display drive method of 16 rank electrophoretic display device (EPD) according to claim 1, it is characterised in that driving electrodes electricity
Pressure is arranged to 15V to realize display driving.
A kind of 4. display drive method of 16 rank electrophoretic display device (EPD) according to claim 1, it is characterised in that the step C
Wiping the process of GTG includes：
GTG changes n ranks into m ranks, and DC balance recovers waveform drives the GTG of pixel to be transformed to from n ranks by voltage change
15 ranks, 0 rank then is transformed to from 15 ranks, that is, drive pixel to make its grey scale transformation to basic GTG.
A kind of 5. display drive method of 16 rank electrophoretic display device (EPD) according to claim 1, it is characterised in that the step C
Voltage be arranged to turn to positive voltage by negative voltage, the color range based on ensureing black state.
A kind of 6. display drive method of 16 rank electrophoretic display device (EPD) according to claim 1, it is characterised in that the step D
New GTG is write with a brush dipped in Chinese ink using negative voltage.
7. a kind of display driving system of 16 rank electrophoretic display device (EPD), it is characterised in that including following：
Display input device, it is configured to make display controller receive GTG display command, calls waveform inquiry table, wherein waveform is looked into
Table is ask to be used to store 16 rank GTG waveforms；
Display control unit, it is configured to make display controller that the shape information of GTG be passed into drive according to GTG display command
The shape information of moving electrode controller, wherein GTG includes DC balance corresponding to GTG to be wiped and recovers waveform and ash to be shown
The drive waveforms of rank；
Driving electrodes wiping arrangement, the shape information for making driving electrodes controller receive GTG is configured to, is applied by driving electrodes
Corresponding with GTG to be wiped DC balance is added to recover the voltage of waveform to wipe GTG；
Driving electrodes drive device, it is configured to make driving electrodes controller after completing to wipe GTG, according to the waveform of GTG
Information, the voltage for applying suitable GTG drive waveforms by driving electrodes write with a brush dipped in Chinese ink new GTG.
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| CN108735164B (en) * | 2017-04-20 | 2020-10-23 | 合肥捷达微电子有限公司 | Electronic paper display device, display driving system and display driving method thereof |
| CN109545154B (en) * | 2019-01-26 | 2020-11-24 | 福州大学 | Driving method for keeping direct current balance of electrowetting electronic paper |
| CN109801600B (en) * | 2019-02-26 | 2020-11-17 | 江西兴泰科技有限公司 | Method for displaying four-gray-scale color by electronic price tag |
| CN114566131B (en) * | 2021-12-30 | 2023-12-22 | 京东方科技集团股份有限公司 | Display brightness control method and device and display lookup table acquisition method and device |
| CN116665599B (en) * | 2022-11-25 | 2024-03-19 | 荣耀终端有限公司 | Driving method, driving circuit and display device of electrophoresis display screen |
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Application publication date: 20160316 Assignee: Guangxian Technology (Guangdong) Co.,Ltd. Assignor: SHENZHEN GUOHUA OPTOELECTRONICS Co.,Ltd. Contract record no.: X2024980014574 Denomination of invention: A display driving method and system for a 16 order electrophoretic display Granted publication date: 20180105 License type: Exclusive License Record date: 20240910 |
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