CN103021347B - Display control method and display control device for switching grayscale modes of EPD (electrophoretic display) screen - Google Patents
Display control method and display control device for switching grayscale modes of EPD (electrophoretic display) screen Download PDFInfo
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Abstract
The invention discloses a display control method for switching grayscale modes of an EPD (electrophoretic display) screen. The display control method includes that an application module transmits screen refreshing mode parameters and a screen refreshing request to an operating system; the operating system transmits image data and the screen refreshing mode parameters to a driving module; the driving module selects a corresponding source anode voltage value and a corresponding source cathode voltage value according to the screen refreshing mode parameters, and source anode voltage and source cathode voltage in an EPD power circuit are regulated to reach the source anode voltage value and the source cathode voltage value respectively; the EPD power circuit is connected to the EPD screen by the driving module; the driving circuit transmits the screen refreshing mode parameters and the image data to an EPD control module; the EPD control module inquires driving data in a driving table according to the screen refreshing mode parameters and transmits the driving data to the driving module, the driving data correspond to the image data, and the driving module drives the EPD power circuit to be connected to the EPD screen according to the driving data; and the EPD power circuit is disconnected from the EPD screen by the driving module according to a power-down time sequence of the EPD screen. The invention further discloses a display control method for switching the grayscale modes of the EPD screen.
Description
Technical field
The present invention relates to EPD and show control field, relate in particular to the display control method that a kind of EPD screen grayscale mode is switched.
Background technology
Electrophoretic display technology (EPD) claim again electrophoretic display device (EPD), is the early display technique of development of class master mode display, is to utilize coloured charged ball, by extra electric field, in liquid environment, move, present the display effect of different colours, it represents that manufacturer comprises E-Ink and Sipix.The principle of work that electrophoretic techniques shows is that the electron ion by being immersed among transparent or colour liquid moves, and by overturning or mobile particulate brightens pixel or dimmed, and can be fabricated in glass, metal or plastic.Concrete technology is that the TiO 2 particles that diameter is about to 1mm is dispersed in hydrocarbon oil, black dyes, surfactant and make the charged charge control agent of particle also be added in hydrocarbon oil; This potpourri is placed on two interblocks apart from being between the parallel conductive plates of 10-100mm, and when to two current-carrying plate making alives, these particles can move to the thin plate with opposite charges from the thin plate at place in the mode of electrophoresis.When particle is positioned at the front (display surface) of display, display screen is white, and this is because light is scattered back reader one side by TiO 2 particles; When particle is positioned at the display back side, display is black, and this is because coloured dye has absorbed incident light.If the electrode at the back side is divided into a plurality of small pictorial elements (pixel), by each region of display being added to suitable voltage produces echo area and uptake zone pattern, can form image.
Electrophoretic techniques has several large advantages.The one, energy consumption is low.Owing to thering is bistability, after power supply is closed, still on display, image is retained to several days or some months.The 2nd, the display that electrophoretic techniques is produced belongs to reflection-type, therefore has good daylight readable, equally also can in front of the light of face or side combine, for dark surrounds.The 3rd, there are the potentiality of low production cost because this technology does not need strict encapsulation, and adopt solution processing techniques as printing be feasible.The 4th, it is characteristic flexibly that electrophoretic display device (EPD) be take form factor, allows that they are fabricated on plastics, metal or glass surface, so it is the optimal selection of flexible display technologies.
EPDPing factory can be a WAVEFORM file of each screen configuration, and WAVEFORM file has the data of many kinds of brush screen patterns.Brush screen pattern has GC, DU, A2 etc.GC pattern is to be updated to 16 GTGs from 16 GTGs, but the finer and smoother display speed of the multidisplay image ratio of grey exponent number is slow.DU pattern is updated to 2 GTGs from 16 GTGs, but the more coarse display speed of the image ratio that grey exponent number shows is less faster than GC pattern.A2 pattern is to be updated to 2 GTGs from 2 GTGs, but the more coarse display speed of the image ratio that grey exponent number shows is less faster than DU.Each screen factory of the name of GC, DU, A2 pattern is inconsistent, but character is the same, as being updated to 16 GTGs from 16 GTGs or being updated to 2 GTGs from 16 GTGs.
EPDPing factory has just designed different grayscale mode in order to take into account high gray number and speed, as 16 grayscale mode, 2 grayscale mode etc.Be characterized in that the fewer display speed of grey exponent number is faster.When design software, to select different brush screen patterns according to scene not, need to show and just select fast low grayscale mode.The problem that this kind of display mode exists is, different grayscale mode are because display speed is different, and the contrast showing is different, this cause different grayscale mode to be switched showing after screen can leave the miserable shadow of piece image.
Summary of the invention
The invention provides a kind of display control method and device that different mode switches the EPD screen grayscale mode switching of the problem that after demonstration, shadow is heavy disastrously that solve.
For addressing the above problem, the technical scheme that the present invention adopts is:
The display control method that provides a kind of EPD screen grayscale mode to switch, comprising: application module is sent to operating system by brush screen mode parameter and brush screen request; Operating system is carried out UI drawing and drawn view data and described brush screen mode parameter is sent to driver module; Driver module is selected preset source cathode voltage value and the source negative battery voltage corresponding with brush screen mode parameter according to described brush screen mode parameter, and regulates source cathode voltage and source cathode voltage in EPD power circuit to reach respectively described source cathode voltage value and source negative battery voltage; Driver module is connected EPD power circuit according to EPD screen electrifying timing sequence and is shielded to EPD; Driver module is sent to EPD control module by brush screen mode parameter and view data; EPD control module reads the driving form that brush screen mode parameter is corresponding from WAVEFORM packet according to brush screen mode parameter, in driving form, inquire about the driving data corresponding with view data and the driving data of finding is sent to driver module, driver module drives EPD power circuit to shield to EPD according to driving data; Driver module disconnects the EPD power circuit of EPD screen according to EPD screen power-off sequential.
Another technical solution used in the present invention is:
The display control unit that provides a kind of EPD screen grayscale mode to switch, comprises application module, operating system, driver module, EPD screen, EPD control module and memory module; Described application module is for being sent to operating system by brush screen mode parameter and brush screen request; Described operating system comprises: UI drawing unit, for carrying out UI drawing; And first data transmission unit, for drawn view data and described brush screen mode parameter are sent to driver module; Described driver module comprises: preset voltage acquiring unit, for selecting preset source cathode voltage and the source cathode voltage corresponding with brush screen mode parameter according to described brush screen mode parameter; Preset voltage setting unit, for regulating source cathode voltage and the source cathode voltage of EPD power circuit to reach respectively described source cathode voltage value and source negative battery voltage; Power drives unit, shields to EPD for connecting EPD power circuit according to EPD screen electrifying timing sequence; And second data transmission unit, for brush screen mode parameter and view data are sent to EPD control module; Described EPD control module reads for the WAVEFORM packet of storing from memory module according to brush screen mode parameter the driving form that brush screen mode parameter is corresponding, inquires about the driving data corresponding with view data and the driving data of finding is sent to described power drives unit in driving form; Described power drives unit is also for driving EPD power circuit to EPD screen and for disconnect the EPD power circuit of EPD screen according to EPD screen power-off sequential according to driving data.
Beneficial effect of the present invention is, regulates source cathode voltage and source cathode voltage, can change the display comparison degree of EPD screen.So just utilize adjusting source cathode voltage and source cathode voltage, come beneficial effect of the present invention to be, showing that image first sets source cathode voltage corresponding to current brush screen pattern and source cathode voltage before EPD screen, the corresponding provenance cathode voltage of each brush screen pattern and source cathode voltage, by change the source cathode voltage of EPD and the display comparison degree that source cathode voltage regulates EPD screen when brush screen pattern is switched, the different display comparison degree that compensate different brush screen patterns while switching between different brush screen patterns with this, improve ghost reconstructed image.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the display control unit that in an embodiment of the present invention, a kind of EPD screen grayscale mode is switched;
Fig. 2 is the structured flowchart of control module in Fig. 1;
Fig. 3 is the process flow diagram of the display control method that in an embodiment of the present invention, a kind of EPD screen grayscale mode is switched.
Main element symbol description
The display control unit 100 that EPD screen grayscale mode is switched; Application module 10;
Operating system 20; Driver module 30; EPD power circuit 40; EPD screen 70;
EPD control module 50; Memory module 60; Preset voltage acquiring unit 31;
Preset voltage setting unit 32; Power drives unit 33; The second data transmission unit 34.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, being realized object and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
Referring to Fig. 1, is the structured flowchart of the display control unit that in an embodiment of the present invention, a kind of EPD screen grayscale mode is switched.The display control unit 100 that a kind of EPD screen grayscale mode is switched comprises application module 10, operating system 20, driver module 30, EPD power circuit 40, EPD control module 50, memory module 60 and EPD screen 70.
Described application module 10 is for being sent to operating system 20 by brush screen mode parameter and brush screen request.Described operating system 20 comprises UI drawing unit and the first data transmission unit.Described UI drawing unit is used for carrying out UI drawing, and described the first data transmission unit is for being sent to driver module 30 by drawn view data and described brush screen mode parameter.
Referring to Fig. 2, is the structured flowchart of control module in Fig. 1.Described driver module 30 comprises preset voltage acquiring unit 31, preset voltage setting unit 32, power drives unit 33 and the second data transmission unit 34.Described preset voltage acquiring unit 31 is for selecting preset source cathode voltage value and the source negative battery voltage corresponding with brush screen mode parameter according to described brush screen mode parameter.Described preset voltage setting unit 32 is for regulating source cathode voltage and the source cathode voltage of EPD power circuit to reach respectively described source cathode voltage value and source negative battery voltage.EPD power circuit is connected to EPD screen 70 for shield 70 electrifying timing sequences according to EPD in described power drives unit 33.Described the second data transmission unit 34 is for being sent to EPD control module 50 by brush screen mode parameter and view data.
Described EPD control module 50, for reading the driving form that brush screen mode parameter is corresponding according to brush screen mode parameter from the WAVEFORM packet of memory module 60 storages, is inquired about the driving data corresponding with view data and the driving data of finding is sent to described power drives unit 33 in driving form.Described power drives unit 33 is also for driving EPD power circuit to EPD screen 70 and for disconnect the EPD power circuit of EPD screen according to EPD screen power-off sequential according to driving data.
Referring to Fig. 3, is the process flow diagram of the display control method that in an embodiment of the present invention, a kind of EPD screen grayscale mode is switched.The display control method that EPD screen grayscale mode is switched, comprising:
Step S1, application module are sent to operating system by brush screen mode parameter and brush screen request;
Step S2, operating system are carried out UI drawing and drawn view data and described brush screen mode parameter are sent to driver module;
Step S3, driver module are selected preset source cathode voltage value and the source negative battery voltage corresponding with brush screen mode parameter according to described brush screen mode parameter, and are regulated source cathode voltage and source cathode voltage in EPD power circuit to reach respectively described source cathode voltage value and source negative battery voltage;
Step S4, driver module are connected EPD power circuit according to EPD screen electrifying timing sequence and are shielded to EPD;
Step S5, driver module are sent to EPD control module by brush screen mode parameter and view data;
Step S6, EPD control module read the driving form that brush screen mode parameter is corresponding from WAVEFORM packet according to brush screen mode parameter, in driving form, inquire about the driving data corresponding with view data and the driving data of finding is sent to driver module, driver module drives EPD power circuit to shield to EPD according to driving data;
Step S7, driver module disconnect the EPD power circuit of EPD screen according to EPD screen power-off sequential.
Beneficial effect of the present invention is, regulates source cathode voltage and source cathode voltage, can change the display comparison degree of EPD screen.So just utilize adjusting source cathode voltage and source cathode voltage, come beneficial effect of the present invention to be, showing that image first sets source cathode voltage corresponding to current brush screen pattern and source cathode voltage before EPD screen, the corresponding provenance cathode voltage of each brush screen pattern and source cathode voltage, by change the source cathode voltage of EPD and the display comparison degree that source cathode voltage regulates EPD screen when brush screen pattern is switched, the different display comparison degree that compensate different brush screen patterns while switching between different brush screen patterns with this, improve ghost reconstructed image.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (2)
1. the display control method that EPD screen grayscale mode is switched, is characterized in that, comprising:
Application module is sent to operating system by brush screen mode parameter and brush screen request;
Operating system is carried out UI drawing and drawn view data and described brush screen mode parameter is sent to driver module;
Driver module is selected preset source cathode voltage value and the source negative battery voltage corresponding with brush screen mode parameter according to described brush screen mode parameter, and regulates source cathode voltage and source cathode voltage in EPD power circuit to reach respectively described source cathode voltage value and source negative battery voltage;
Driver module is sent to EPD control module by brush screen mode parameter and view data;
EPD control module reads the driving form that brush screen mode parameter is corresponding from WAVEFORM packet according to brush screen mode parameter, in driving form, inquire about the driving data corresponding with view data and the driving data of finding is sent to driver module, driver module drives EPD power circuit to shield to EPD according to driving data;
Driver module disconnects the EPD power circuit of EPD screen according to EPD screen power-off sequential.
2. the display control unit that EPD screen grayscale mode is switched, is characterized in that, comprises application module, operating system, driver module, EPD screen, EPD control module, EPD power circuit and memory module;
Described application module is for being sent to operating system by brush screen mode parameter and brush screen request;
Described operating system comprises:
UI drawing unit, for carrying out UI drawing; And
The first data transmission unit, for being sent to driver module by drawn view data and described brush screen mode parameter;
Described driver module comprises:
Preset voltage acquiring unit, for selecting preset source cathode voltage value and the source negative battery voltage corresponding with brush screen mode parameter according to described brush screen mode parameter;
Preset voltage setting unit, for regulating source cathode voltage and the source cathode voltage of EPD power circuit to reach respectively described source cathode voltage value and source negative battery voltage;
Power drives unit, shields to EPD for connecting EPD power circuit according to EPD screen electrifying timing sequence; And
The second data transmission unit, for being sent to EPD control module by brush screen mode parameter and view data;
Described EPD control module reads for the WAVEFORM packet of storing from memory module according to brush screen mode parameter the driving form that brush screen mode parameter is corresponding, inquires about the driving data corresponding with view data and the driving data of finding is sent to described power drives unit in driving form;
Described power drives unit is also for driving EPD power circuit to EPD screen and for disconnect the EPD power circuit of EPD screen according to EPD screen power-off sequential according to driving data.
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| CN201210572593.XA CN103021347B (en) | 2012-12-25 | 2012-12-25 | Display control method and display control device for switching grayscale modes of EPD (electrophoretic display) screen |
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| CN105957476B (en) * | 2016-05-31 | 2018-06-19 | 福州瑞芯微电子股份有限公司 | E-book display panel drive method and e-book |
| WO2020155809A1 (en) * | 2019-01-30 | 2020-08-06 | 掌阅科技股份有限公司 | Electronic paper display device |
| CN116312394A (en) * | 2022-12-30 | 2023-06-23 | 江西兴泰科技股份有限公司 | Method and system for adjusting EPD display gray scale |
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