CN101527117B - Digital electrophoresis display panel driving device and method - Google Patents
Digital electrophoresis display panel driving device and method Download PDFInfo
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- CN101527117B CN101527117B CN200810148843.0A CN200810148843A CN101527117B CN 101527117 B CN101527117 B CN 101527117B CN 200810148843 A CN200810148843 A CN 200810148843A CN 101527117 B CN101527117 B CN 101527117B
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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
- G09G3/3433—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
Abstract
The invention relates to a digital electrophoresis display panel driving device and a method. The digital electrophoresis display panel driving device comprises a panel driving memory and a connection circuit, wherein the panel driving memory is arranged on an electrophoresis display panel, and a system board reads data in the panel driving memory through the connection circuit. The driving method comprises the steps as follows: a verification system displays data; a control chip reads digital panel driving data in the panel driving memory; the control chip converts the read digital panel driving data in the panel driving memory into an analog potential signal; and the control chip converges the analog potential signal into a driving integration circuit driving panel on a panel. The invention adopts a digital mode and reads a set value directly from the memory without manual adjustment, thereby saving labor time and error of manual adjustment and reducing the voltage error value of the potential of a common electrode.
Description
Technical field
The invention relates to a digital electrophoresis display panel driving device and method, refer in particular to a kind of drive unit and method that is applied to electrophoretic display device (EPD) (Electronic Paper).
Background technology
So-called electrophoretic display device (EPD) (Electronic Paper), different from our Common fibrous paper, be a kind of comprise many " small spheroid " (capsule) " conduction " " macromolecule " material, its appearance is the same with general papery with feature, have pliability and can repeat to show again data.Among electronic paper technology, micro-spherular size represents display picture element (Pixel) size, and wherein micro-spherular characteristic is can be subject to the driving of external voltage and change its state.The electronic ink display of being mentioned as U.S. Patent Publication No. 20060050050.The characteristic of Electronic Paper conduction is for being subject to the change of extraneous driving voltage, so material require is electric conductor, and Electronic Paper is used macromolecular material to emphasize the characteristic of its pliability (flexible) again, deflection that therefore can be as general paper.
The advantage of aforementioned electric phoretic display (Electronic Paper) is that brightness can reach 3～6 times of reflection-type color LCD, is more convenient to read; Place in dark place and sight direct projection partially also can be browsed; Contrast is more taller than newspaper; Which and no matter from angle, can read, just as typescripts on paper.
And aforesaid electrophoretic display device (EPD), even after closing the power supply of display, still can display frame.This is conducive to extend the battery life of portable device.While conventionally using, do not need to open background light, standard power consumption can be lower than 1/1000 of laptop computer displays.
Moreover, while showing due to electrophoretic display device (EPD), just as the writing inking, therefore can alleviate the fatigue of eyes on paper.Compare with common LCD, electrophoretic display device (EPD) is thinner and light.
According to the explanation of encyclopedia (www.wikipedia.org) on Wikipedia line, see http://en.wikipedia.org/wiki/Electronic_paper, electrophoretic display device (EPD) the earliest (Electronic Paper) technology is that the researchist Nick Sheridon by Xerox was developed in the 1970's, its characteristic is to comprise charged bead, wherein the one side of ball is white, and another side is black, when electric field changes, club rotates up and down, and degree of presenting different colours.
The microcapsules that use in the electrophoretic display technology of the second generation comprise two kinds of pigment of black and white (being called electric ink E-Ink), and what carried inside is transparent fluid, wherein microcapsules is clear glass above, below is bottom electrode, top is top electrode, when electrode changes, pigment just can make progress and move down according to the positive and negative of electrode, then causes the colour developing of B&W.Its characteristic is to replace traditional bead with microcapsules, and in capsule, fill charged black particle and charged white particle, and via the control of external electric field by white particle up or move down, wherein when black particle (while approaching reader's direction) develop the color pixel of black up, when black particle down time (away from reader time), white pixel color develops the color.The benefit of simultaneously selecting black and white coating is to increase its resolution, and for example same capsule just can be subject to and negative electrode drive simultaneously, that is to say, a capsule can demonstrate two kinds of colors.Because the basic module of this kind of E-Ink Electronic Paper is very simple, so correlation technique can be applied to the carrier of different surfaces material, on comprising plastic cement, glass or even weaving cotton cloth.
Because the mobile portability of electrophoretic display device (EPD) (Electronic Paper) is stronger, can Reusability, fast, the cost of renewal speed is lower even also has writable input.Therefore adopt the advantage technology of Electronic Paper, to following Publishing Industry, bring revolutionary challenge, a large amount of reading materials, even paper and printer all can be carried, and can collect whenever and wherever possible and read up-to-date newpapers and periodicals and revised file at any time, and this sight is quietly come us at one's side by the development because of electronic paper technology.Also have the most important, Electronic Paper let us can more effectively conserve forests, the environment of preserving our planet.The annual consume paper in the whole world surpasses 200,000,000 tons at present, needs a large amount of trees of felling.The maintaining ecological balance that appears as of Electronic Paper has been made significant contribution.
Further, the appearance of electrophoretic display device (EPD) (Electronic Paper) is promoting the innovation of media report.Japan Office of the Telecommunications Authority declare, will domestic main newpapers and periodicals be sent to digitized signal in user's computer by wideband net, user utilizes distinctive software just can see news.If there has been Electronic Paper, just can all downloads or transmit by wireless network holding within these newpapers and periodicals.Blog (blog) and online content can certainly be downloaded, read whenever and wherever possible.The analyst Mai Kuiwei of U.S. Foryst research company claims, if this Electronic Paper product can be realized to the leap of the technology such as colored and video signal demonstration, is just expected to replace cheap, universal liquid crystal display, starts one simultaneously and changes the revolution of reading idea.
But at present electrophoretic display device (EPD) (Electronic Paper) just under development still has obstacle in use, comprise its production cost, show hold time, driving voltage, reliability and reaction time of upgrading picture.Although the various printed matters such as books and press are being realized digitizing, the exploitation of the terminal of the reading of conduct numeral simultaneously use is well afoot also.Yet, the problem that this respect exists is, do be the sensation that how to make reading and when reading feeling when making paper using close? only that " Electronic Paper " can not form display, as necessary condition, also comprise and guarantee that the contrast of image portion and non-image portion is legibility, can eliminate or rewrite original picture and text, the low energy consumption that image writes and preserves etc.
In existing electrophoresis display panel drives, consult the process flow diagram of the conventional electrophoretic panel driving of Fig. 1, electrophoresis display panel is when FEOL (10), impact because of setting parameter, material, encapsulation and environment, therefore the electrophoresis display panel of every a slice all has gap slightly, therefore panel manufacturers can provide different common electrode current potentials (Common Electrode Voltage, Vcom) (11).While therefore driving each chip electrophoresis display pannel, must be adjusted at the common electrode current potential (Common Electrode Voltage, Vcom) on system board.At electrophoresis display panel back-end process (12), be by after electrophoresis display panel cutting, with other elements as after the multiple spare parts such as electric capacity, drive IC, housing, flexible circuit board have assembled, while entering system production and assembly, aging method is to reach by the artificial mode of adjusting variable resistor (13) object that changes common electrode current potential (Common Electrode Voltage, Vcom).Then write waveform voltage value to (14) in the storer on system board.Waiting system is confirmed display frame (15,16), reads after waveform voltage value (17), in conjunction with common electrode current potential (Commo n Electrode Voltage, Vcom) display frame (18) in the storer from system board.Consult the conventional electrophoretic board driving mchanism figure of Figure 1A, by the artificial mode of adjusting variable resistor (111), and avoid load effect to affect common electrode current potential, therefore pass through buffer circuit (112) output voltage to switch input terminal.Utilize control chip to control common electrode level switch (114) and output to output terminal (115).
Summary of the invention
An object of the present invention is to provide a kind of digital electrophoresis display panel driving device and method, the variable-resistance time of required adjustment while being intended to reduce the replacing of electrophoresis display panel, and then accelerate the panel utilization of electrophoretic display device (EPD).Solve existing method and change common electrode current potential by the variable-resistance mode of artificial adjustment, expend man-hour, and easily there is artificial careless mistake tune mistake or the larger problem of error in artificial adjustment.
For taking off on reaching and other objects, the invention provides a kind of digital electrophoresis display panel driving device and method.
Digital electrophoresis display panel driving device of the present invention, includes: a panel driving storer, and it is located on electrophoretic display device (EPD), and it stores common electrode potential setting value and digitizing tablet driving data; One connecting circuit, it is connected to described panel driving storer; And a control chip, it reads the data in this panel driving storer via described connecting circuit.
The present invention also provides a kind of digital electrophoresis display panel driving method, and it comprises the following steps: the 1st step: confirmation system shows data; The 2nd step: control chip reads digitizing tablet driving data and common electrode potential setting value in panel driving storer; The 3rd step: control chip converts digitizing tablet driving data in the panel driving storer reading to simulation current potential signal; The 4th step: control chip will be simulated current potential signal and be imported drive integrated circult driving panel on panel.
Apparatus and method of the present invention are to adopt digital mode, directly from storer, read setting value, needn't manually adjust, can save man-hour and artificial alignment error, can dwindle common electrode current potential (Common Electrode Voltage simultaneously, Vcom) voltage error value, because the simulation error that digitized voltage error is adjusted than analog variable resistance is little.
It is for adjusting variable resistor that aforementioned electric phoretic display drives.Aging method is keeping in repair or during production test, because the common electrode potential setting value of system board need be arranged in pairs or groups with panel, so find the panel of corresponding value maybe must adjust variable resistor to meet the panel of maintenance or test, is therefore wasting many man-hours.
New method of the present invention, can directly read by the storer from panel, and maintenance personal or tester needn't or readjust variable resistor with the panel matching, very convenient, and save man-hour.
Accompanying drawing explanation
Refer to relevant detailed description of the present invention and accompanying drawing thereof, can further understand technology contents of the present invention and object effect thereof; Relevant accompanying drawing is:
Figure 1 shows that the process flow diagram of a conventional electrophoretic panel driving;
Figure 1A is depicted as a conventional electrophoretic board driving mchanism figure;
Fig. 2 A is depicted as a digital electrophoresis display panel driving device figure;
Fig. 2 B is depicted as another digital electrophoresis display panel driving device figure;
Figure 3 shows that a digital electrophoresis display panel drives calcspar;
Figure 4 shows that a digital electrophoresis display panel drives process flow diagram;
Fig. 4 A is depicted as one will convert common electrode potential diagram to by digital electrophoresis display memory data;
Fig. 4 B is depicted as another will convert common electrode potential diagram to by digital electrophoresis display memory data.
Description of reference numerals:
10～18-conventional electrophoretic panel driving step; 111-variable resistor; 112-buffer circuit; 114-common electrode level switch; 115-output terminal; 2-electrophoresis display panel; 23-flexible circuit board; 24-drives storer; 26-soft cable; 25-memory integrated circuit; 34-power-supply controller of electric; 33-microcontroller; 27-flexible printed wiring board link; 31-control chip; 32-panel power module; 21a-21d-drives chip; 40～47-digital electrophoresis display panel actuation step; 51,61-control chip; 52-digital analog converter; 54-common electrode level switch; 53-voltage inverter; 55-output terminal; 62-panel module; 116-common electrode current potential generator.
Embodiment
For enabling object of the present invention, driving method feature and effect are made further understanding and understanding, hereby for embodiment, coordinate diagram, are described in detail as follows.
The invention provides a kind of digital electrophoresis display panel driving device and method, by memory storage common electrode potential setting value and panel driving data, adopt digital mode, directly from storer, read setting value, needn't manually adjust, can save man-hour and human error.Digital electrophoresis display panel driving device includes a panel driving storer, and it is located on electrophoretic display device (EPD), for store digital panel driving data, and a connecting circuit, control chip reads the data in this panel driving storer via connecting circuit.
Consult the embodiment of Fig. 2 A of the present invention, the present embodiment is mainly on the flexible circuit board (23) of electrophoresis display panel (2), add panel driving storer (24), at the NC pin (NC Pin) of script electrophoresis display panel flexible printed wiring board soft cable (FPC Tail) (26), add that memory integrated circuit (25) is connected with control chip (61).
Consult the embodiment of Fig. 2 B of the present invention, the present embodiment is on glass at electrophoresis display panel (2) mainly, add panel driving storer (24), utilize the NC pin (NC Pin) of electrophoresis display panel flexible printed wiring board soft cable (FPC Tail) (26) originally to add that memory integrated circuit (25) is connected with control chip (61).
Because electrophoresis display panel is when the FEOL, because of the impact of setting parameter, material, encapsulation and environment, therefore the electrophoresis display panel of every a slice all has gap slightly.While therefore driving each chip electrophoresis display pannel, must adjust common electrode current potential (Common Electrode Voltage, Vcom).At electrophoresis display panel back-end process, be by after electrophoresis display panel cutting, during with the production operation of as multiple in electric capacity, drive IC, housing, flexible circuit board etc. the spare part of other elements assembling, existing method is to adjust variable-resistance mode and reach the object that changes common electrode current potential with artificial.The invention provides a kind of digital electrophoresis display panel driving device and method, panel manufacturers is provided for the different common electrode current potential of each electrophoresis display panel (Common Electrode Voltage, Vcom) and is stored in storer with digital data pattern.This external storage can store electrophoretic display device (EPD) driving voltage waveform.As TaiWan, China patent application case number 096127424, this invention provides a kind of active electrophoretic display driving method.This active electrophoretic display has the complex operator pixel of arranging with matrix form, with the single picture element of driving or several picture element of sequentiality.At a figure of input, learn the GTG value of each picture element, picture element is carried out to the driving of sequentiality.Sequentiality drives for the first time, and for all picture elements on panel, in addition driving voltage makes all picture elements convert wherein one of two extreme GTG values to.According to the resolution bit of definition, repeatedly sequentiality drives, and for the above picture element of all next stage GTG values on panel, in addition upper level GTG value converts the required driving time of next stage GTG value and required driving voltage to.So and then the picture disply of acceleration electrophoretic display device (EPD).Adjust the total driving time that drives each GTG, distinctly increase or reduce extra driving time in the required driving time of different GTG values, be conducive to control the picture disply of each GTG value.The data of this driving time or driving voltage can be stored in the storer on panel.Consult the embodiment of Fig. 3 of the present invention, power-supply controller of electric (34) provides microprocessor (MCU) (33) required power supply, via flexible printed wiring board soft cable (FPC Ta i1) (26) and flexible printed wiring board link (27), control chip (31) reads to provide and gets the data in this panel driving storer (24) and utilize panel power module (32) transmission power supply to the electrophoresis display panel (2) on panel module (62).After data read, the data one-tenth simulation current potential signal via control chip converting digital formula, provides and drives chip (21a-21d) drive cataphoresis display.Digital electrophoresis display panel driving method, consult the process flow diagram of Fig. 4 of the present invention, electrophoresis display panel is when FEOL (40), impact because of setting parameter, material, encapsulation and environment, therefore the electrophoresis display panel of every a slice all has gap slightly, therefore panel manufacturers can provide different common electrode current potential (Common Elect rode Voltage, Vcom) (41), and its digitized driving data and common electrode potential value are write in driving storer.At electrophoresis display panel back-end process (42), be by after electrophoresis display panel cutting, with the spare part assembling as multiple in electric capacity, drive IC, housing, flexible circuit board etc. of other elements, the then instruction of waiting system, its picture drives and comprises following step:
The 1st step (44), confirmation system shows data, and system is after just the data of separate sources are calculated and integrated, and the method representation by its result with drawing goes out, and this step system confirms to be shown to user's image;
The 2nd step (45), control chip reads digitizing tablet driving data in panel driving storer, panel manufacturers provides for the different common electrode current potential of each electrophoresis display panel (Common Electrod e Voltage, Vcom), driving time or driving voltage are stored in storer with digital data pattern, digital electrophoresis display panel driving device includes a panel driving storer, it is located on electrophoresis display panel, and be electrically connected with a connecting circuit, system board reads the data in this panel driving storer via connecting circuit;
The 3rd step (46), control chip converts digitizing tablet driving data in the panel driving storer reading to simulation current potential signal;
The 4th step (47), control chip will be simulated current potential signal and be imported drive integrated circult driving panel on panel.
Consult the embodiment of Fig. 4 A of the present invention, control chip (51) utilizes the digital analog converter (52) in control chip (51) to convert simulation current potential signal to digitizing tablet driving data in the panel driving storer reading, via control chip, control common electrode level switch (54), make the simulation current potential signal of exporting via voltage inverter (53) after common electrode level switch (54), by output terminal (55) to the drive integrated circult on panel.
Consult the embodiment of Fig. 4 B of the present invention, control chip (113) utilizes the common electrode current potential generator (116) in control chip (113) by digitizing tablet driving data in the panel driving storer reading, via common electrode level switch (114), output common electrode current potential via output terminal (115) to the drive integrated circult on panel.
Above embodiment is only preferred embodiment of the present invention, and it is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art, in the situation that not exceeding spirit and scope of the invention, converts, revises even equivalence to it, and these changes all can fall into claim protection domain of the present invention.
Claims (3)
1. a digital electrophoresis display panel driving device, is characterized in that, includes:
One electrophoresis display panel;
One system board;
One panel driving storer, it is located on the on glass or flexible circuit board of this electrophoresis display panel, the common electrode current potential of its store digital formula, this digital common electrode current potential is provided by electrophoresis display panel manufacturer;
One connecting circuit, it is connected to described panel driving storer; And
One control chip, it is located on this system board, it reads the digital common electrode current potential in this panel driving storer via described connecting circuit, this control chip contains a digital analog converter in order to the digital common electrode current potential reading is converted to simulation common electrode current potential, and this control chip imports a drive integrated circult on this electrophoresis display panel to drive this electrophoresis display panel by simulation common electrode current potential.
2. a digital electrophoresis display panel driving method, is characterized in that, comprises the following steps:
The 1st step: confirmation system shows data;
The 2nd step: control chip reads the digital common electrode current potential in panel driving storer;
The 3rd step: control chip converts the digital common electrode current potential in the panel driving storer reading to simulation common electrode current potential; And
The 4th step: control chip will be simulated common electrode current potential and be imported drive integrated circult drive cataphoresis display panel on electrophoresis display panel, the control chip of the 3rd step utilizes the digital analog converter in control chip to convert simulation common electrode current potential to common electrode current potential digital in the panel driving storer reading, via control chip, control common electrode level switch, make the simulation common electrode current potential of exporting via voltage inverter after common electrode level switch, by output terminal to the drive integrated circult on electrophoresis display panel.
3. a digital electrophoresis display panel driving method, is characterized in that, comprises the following steps:
The 1st step: confirmation system shows data;
The 2nd step: control chip reads the digital common electrode current potential in panel driving storer;
The 3rd step: control chip converts the digital common electrode current potential in the panel driving storer reading to simulation common electrode current potential; And
The 4th step: control chip will be simulated common electrode current potential and be imported drive integrated circult drive cataphoresis display panel on electrophoresis display panel, the control chip of the 3rd step utilizes the common electrode current potential generator in control chip by common electrode current potential digital in the panel driving storer reading, via common electrode level switch, output common electrode current potential via output terminal to the drive integrated circult on electrophoresis display panel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810148843.0A CN101527117B (en) | 2008-03-03 | 2008-09-27 | Digital electrophoresis display panel driving device and method |
| EP08171951A EP2099020A3 (en) | 2008-03-03 | 2008-12-17 | Digital electrophoretic display panel driving method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810081647 | 2008-03-03 | ||
| CN200810081647.6 | 2008-03-03 | ||
| CN200810148843.0A CN101527117B (en) | 2008-03-03 | 2008-09-27 | Digital electrophoresis display panel driving device and method |
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| CN101527117A CN101527117A (en) | 2009-09-09 |
| CN101527117B true CN101527117B (en) | 2014-02-19 |
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| CN200810148843.0A Active CN101527117B (en) | 2008-03-03 | 2008-09-27 | Digital electrophoresis display panel driving device and method |
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| CN102479441A (en) * | 2010-11-23 | 2012-05-30 | 汉王科技股份有限公司 | E-reader and method for controlling common voltage (VCOM) of e-paper screen |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366657A (en) * | 2000-04-14 | 2002-08-28 | 皇家菲利浦电子有限公司 | Display driver with double calibration means |
| CN1589462A (en) * | 2001-11-20 | 2005-03-02 | 伊英克公司 | Methods for driving bistable electro-optic displays |
| WO2005031689A1 (en) * | 2003-09-29 | 2005-04-07 | Koninklijke Philips Electronics, N.V. | A bi-stable display with accurate greyscale and natural image update |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7528822B2 (en) * | 2001-11-20 | 2009-05-05 | E Ink Corporation | Methods for driving electro-optic displays |
| US20060050050A1 (en) | 2003-01-23 | 2006-03-09 | Guofu Zhou | Driving a bi-stable matrix display device |
| US7463226B2 (en) * | 2003-04-23 | 2008-12-09 | Panasonic Corporation | Driver circuit and display device |
| EP2698784B1 (en) * | 2003-08-19 | 2017-11-01 | E Ink Corporation | Electro-optic display |
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2008
- 2008-09-27 CN CN200810148843.0A patent/CN101527117B/en active Active
- 2008-12-17 EP EP08171951A patent/EP2099020A3/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366657A (en) * | 2000-04-14 | 2002-08-28 | 皇家菲利浦电子有限公司 | Display driver with double calibration means |
| CN1589462A (en) * | 2001-11-20 | 2005-03-02 | 伊英克公司 | Methods for driving bistable electro-optic displays |
| WO2005031689A1 (en) * | 2003-09-29 | 2005-04-07 | Koninklijke Philips Electronics, N.V. | A bi-stable display with accurate greyscale and natural image update |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2099020A2 (en) | 2009-09-09 |
| CN101527117A (en) | 2009-09-09 |
| EP2099020A3 (en) | 2010-05-05 |
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