CN111048046B - Driving method of double-color electrophoretic display - Google Patents
Driving method of double-color electrophoretic display Download PDFInfo
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- CN111048046B CN111048046B CN201911226527.5A CN201911226527A CN111048046B CN 111048046 B CN111048046 B CN 111048046B CN 201911226527 A CN201911226527 A CN 201911226527A CN 111048046 B CN111048046 B CN 111048046B
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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 provides a driving method of a double-color electrophoretic display, which comprises the following steps: the first waveform image drives the pixel to a first color pixel; the second waveform image drives the pixel to a second color pixel; the first waveform diagram and the second waveform diagram both comprise a plurality of groups of micro-drive waveforms and a plurality of groups of stop-drive waveforms, the micro-drive waveforms are used for driving the pixels to target pixels, the stop-drive waveforms are not driven, the micro-drive waveforms and the stop-drive waveforms are alternately carried out, and in a set-drive display stage, when the waveforms in the first waveform diagram are the micro-drive waveforms, the waveforms in the second waveform diagram at the same drive time are the stop-drive waveforms; and when the waveform in the first waveform diagram is a stop driving waveform, the waveform in the second waveform diagram at the same driving time is a micro driving waveform. The electrophoretic display driven by the driving method of the double-color electrophoretic display provided by the invention has better display effect.
Description
Technical Field
The invention belongs to the technical field of display devices, and particularly relates to a driving method of a double-color electrophoretic display.
Background
Electrophoretic displays have the advantages of high contrast, wide viewing angles, low power consumption, bistability, and the like. The display effect of the novel liquid crystal display is the same as that of common paper, so that people can read comfortably, and the novel liquid crystal display can be converted and refreshed to display new contents like a common liquid crystal display. The use of electrophoretic display reduces the felling of wood, and is beneficial to realizing green ecology, so people pursue the application. Conventional driving methods of electronic paper are, for example (see fig. 1): the first section of waveform 1 or the sixth section of waveform 6 is driven to the reverse display pixel, and the second section of waveform 2 and the third section of waveform 3 are a group of refreshing waveforms with opposite voltages; the fourth segment waveform 4 and the fifth segment waveform 5 are another set of refresh waveforms with opposite voltages. When the first segment waveform 1 is not driven, the sixth segment waveform 6 is driven to the reverse pixel and the seventh segment waveform 7 is refreshed to the target pixel, as in the first waveform S1 and the third waveform S3. As with the second set of waveform diagrams S2 and the fourth set of waveform diagrams S4, when the first segment waveform 1 inverts the pixel, the sixth segment waveform 6 is directly driven to the target pixel and the seventh segment waveform 7 is not driven. This presents a problem in that there may be some pixels driven and some pixels not driven during the seventh waveform 7, and if the driven and non-driven pixels are of different colors and are located adjacently, this may result in the driven pixel actually displaying a color that is spread to the edge-adjacent pixels, which may overlay the non-driven pixels of different colors. Referring to fig. 2, when the display pattern S12 is driven from the initial pattern S11, the pattern is blurred, the sharpness is reduced, and the display effect is poor.
The above problems have been a technical difficulty in the art. In order to solve the above problem, it is studied to drive all pixels to the target pixel in the seventh driving waveform to solve the problem caused by some pixels driving and some pixels not driving. However, the seventh driving waveform drives all the pixels, and the problem of virtual reality patterns cannot be solved well. If the target pattern is a pattern in which one color pixel is wrapped by a different color pixel, the seventh driving waveform simultaneously drives all the pixels, which also causes the wrapped pixels to have a problem of being covered. And all pixels are driven in time, so that the power consumption is large, and the method is not economical and energy-saving.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a driving method of a bicolor electrophoretic display with better updating effect.
The invention provides a driving method of a double-color electrophoretic display, which comprises the following steps:
the first waveform image drives the pixel to a first color pixel;
the second waveform image drives the pixel to a second color pixel;
the first waveform diagram and the second waveform diagram each include a plurality of sets of micro-drive waveforms for driving a pixel to a target pixel and a plurality of sets of stop-drive waveforms, the stop-drive waveforms being non-driven, the micro-drive waveforms and the stop-drive waveforms being alternated,
in a setting driving display stage, when the waveform in the first waveform diagram is a micro-driving waveform, the waveform in the second waveform diagram at the same driving time is a stop driving waveform; and when the waveform in the first waveform diagram is a stop driving waveform, the waveform in the second waveform diagram at the same driving time is a micro driving waveform.
Preferably, the front driving waveform is set as the (n-1) th group, the rear driving waveform is set as the (n) th group, and the waveform time of the (n-1) th group of micro-driving waveforms is longer than that of the (n) th group of micro-driving waveforms; the waveform time of the n-1 th group stop driving waveform is longer than that of the nth group stop driving waveform.
Preferably, the sum of the waveform times of the plurality of sets of micro drive waveforms is equal to the sum of the waveform times of the plurality of sets of stop drive waveforms.
Preferably, the waveform times of the single set of microdrive waveforms and the single set of stop drive waveforms are equal.
Preferably, the first waveform diagram and the second waveform diagram further include a first anti-display waveform and a second anti-display waveform, and the first waveform diagram drives the pixel to a color different from the first color pixel; in the second waveform diagram, the first reverse waveform or the second reverse waveform drives the pixel to a color different from the second color pixel.
Preferably, when the first anti-display waveform drives the pixel to a different color from the first color pixel, the second anti-display waveform does not drive, and when the first anti-display waveform does not drive, the second anti-display waveform drives the pixel to a different color from the first color pixel; when the first reverse rendering waveform drives the pixel to a color different from the second color pixel, the second reverse rendering waveform is not driven, and when the first reverse rendering waveform is not driven, the second reverse rendering waveform drives the pixel to a color different from the second color pixel.
Preferably, the time of the first reproduction waveform, the time of the second reproduction waveform, the time sum of the plurality of groups of micro-drive waveforms and the time sum of the plurality of groups of stop-drive waveforms are the same.
Preferably, the first waveform in the first waveform diagram is different from the first waveform in the second waveform diagram in the driving voltage; the second waveform in the first waveform diagram is different from the second waveform in the second waveform diagram in driving voltage.
Preferably, before the micro-driving waveform and the stop driving waveform are driven, a plurality of groups of refreshing waveforms are further included, wherein the refreshing waveforms comprise positive waveforms and negative waveforms, and the positive waveforms and the negative waveforms are alternately performed.
Preferably, the first color pixel is white, and the second color pixel is black.
The electrophoretic display driven by the driving method of the double-color electrophoretic display provided by the invention has better display effect.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a waveform diagram illustrating a driving method of an electrophoretic display according to the prior art;
FIG. 2 is a diagram illustrating the effect of updating an electrophoretic display according to the prior art;
fig. 3 is a waveform diagram illustrating a driving method of a dual-color electrophoretic display according to this embodiment;
fig. 4 is a diagram illustrating a second waveform of the driving method of the dual-color electrophoretic display of the present embodiment.
Detailed Description
The technical solutions of the present invention are further described in detail with reference to specific examples so that those skilled in the art can better understand the present invention and can implement the present invention, but the examples are not intended to limit the present invention.
Referring to fig. 3 to 4, an embodiment of the present invention provides a driving method of a dual-color electrophoretic display, including the following steps:
the first waveform diagram S102 drives the pixel to a first color pixel;
the second waveform S101 drives the pixel to a second color pixel;
the two-color electrophoretic display in this embodiment is composed of first color pixels and second color pixels, and may be, for example, a black-and-white display in which the first color pixels are white and the second color pixels are black.
The first waveform diagram S102 and the second waveform diagram S101 each include a plurality of sets of micro-driving waveforms 710 and a plurality of sets of stop-driving waveforms 700, the micro-driving waveforms 710 are used to drive the pixel to the target pixel, that is, the micro-driving waveforms 710 are driven to be positive or negative voltage, and cannot be 0V voltage. In this embodiment, the continuous driving time of each group of micro-driving waveforms is less than the single continuous driving time of any waveform before the set driving display stage. For example, before the setting driving display stage, the display inversion waveform or the refresh waveform is also included, so that the continuous driving time of each group of micro-driving waveforms is shorter than the continuous driving time of the display inversion waveform and is also shorter than the continuous driving time of the refresh waveform.
In the first waveform diagram S102, the micro-driving waveform 710 is used to drive the pixel to the first color pixel, and in the second waveform diagram S101, the micro-driving waveform 710 is used to drive the pixel to the second color pixel. No drive occurs to stop driving waveform 700, the drive voltage is OV, micro driving waveform 710 and stop driving waveform 700 are alternately performed,
in the set driving display stage, when the waveform in the first waveform diagram S102 is the micro-driving waveform 710, the waveform in the second waveform diagram S101 at the same driving time is the stop driving waveform 700; when the waveform in the first waveform diagram S102 is the stop driving waveform 700, the waveform in the second waveform diagram S101 at the same driving time is the micro driving waveform 710. That is, the driving voltages of the first waveform diagram S102 and the second waveform diagram S101 are different at the same driving time when the two-color electrophoretic display is driven. When the waveform in the first waveform diagram S102 is the micro-driving waveform 710, the corresponding waveform in the second waveform diagram S101 is the stop-driving waveform 700; when the waveform in the first waveform diagram S102 is the stop driving waveform 700, the corresponding waveform in the second waveform diagram S101 is the micro driving waveform 710.
Referring to fig. 3, in the driving method of the dual-color electrophoretic display of this embodiment, when the pixel region that needs to be driven to the first color pixel is driven to the first color pixel by the micro-driving waveform 710 of the first waveform diagram S102, the pixel region that needs to be driven to the second color pixel is not driven first, and then the pixel region that needs to be driven to the second color pixel is driven to the second color pixel by the micro-driving waveform 710 of the second waveform diagram S101, and the pixel region that needs to be driven to the first color pixel is not driven at this time. The same applies to the pixel region first driven to the second color pixel, with reference to the above embodiment. Target color driving is alternately performed through the first waveform diagram S102 and the second waveform diagram S101, driving balance of two colors is achieved, and the display effect is good.
Referring to FIG. 3, in the preferred embodiment, the leading drive waveform is set to the (n-1) th group and the trailing drive waveform is set to the (n) th group, and during display driving, the (n-1) th group of waveforms is driven first and then the (n) th group of waveforms is driven. In this embodiment, the waveform time of the n-1 th group of micro-driving waveforms 710 is longer than that of the n-th group of micro-driving waveforms 710, i.e. the waveform time of the plurality of groups of micro-driving waveforms 710 gradually decreases with the driving time. The waveform time of the n-1 th group stop driving waveform 700 is greater than that of the n-th group stop driving waveform 700, that is, the waveform time of the plurality of groups stop driving waveforms 700 is gradually decreased with the driving time.
In this embodiment, the first waveform S102 drives the pixel to the first color pixel with the plurality of micro-drive waveforms 710, and the second waveform S101 drives the pixel to the second color pixel with the plurality of micro-drive waveforms 710. For example, when the first color pixel is black and the first color pixel is white, the micro-driving waveforms 710 of the first waveform diagram S102 are a process of gradually turning the pixel black, and the micro-driving waveforms 710 of the second waveform diagram S101 are a process of gradually turning the pixel white, so that the two-color display boundary is more obvious and the display effect is better.
Referring to fig. 3, in a preferred embodiment, the sum of the waveform times of the plurality of sets of micro drive waveforms 710 is equal to the sum of the waveform times of the plurality of sets of stop drive waveforms 700. In a preferred embodiment, the waveform times of the single set of microdrive waveforms 710 and the single set of stop drive waveforms 700 are equal. Constituting an alternating balance of the micro drive waveform 710 and the stop drive waveform 700.
Referring to fig. 4, in a further preferred embodiment, the micro drive waveforms 710 comprise a first set of micro drive waveforms 72, a second set of micro drive waveforms 74, a third set of micro drive waveforms 76 and a fourth set of micro drive waveforms 78 and the stop drive waveforms comprise a first set of stop drive waveforms 71, a second set of stop drive waveforms 73, a third set of stop drive waveforms 75 and a fourth set of stop drive waveforms 77. Let the waveform time of the first set of micro-drive waveforms 72 be T1, the waveform time of the second set of micro-drive waveforms 74 be T3, the waveform time of the third set of micro-drive waveforms 76 be T5, and the waveform time of the fourth set of micro-drive waveforms 78 be T7; the first group stop driving waveform 71 has a waveform time T2, the second group stop driving waveform 73 has a waveform time T4, the third group stop driving waveform 75 has a waveform time T6, and the fourth group stop driving waveform 77 has a waveform time T8. Then T1 > T3 > T5 > T7, T2 > T4 > T6 > T8. T1+ T3+ T5+ T7 ═ T2+ T4+ T6+ T8. T1-T2, T3-T4, T5-T6, and T7-T8.
Referring to fig. 3 and 4, in a preferred embodiment, the first waveform diagram S102 and the second waveform diagram S101 further include a first anti-display waveform 11 and a second anti-display waveform 16, and in the first waveform diagram S102, the first anti-display waveform 11 or the second anti-display waveform 16 drives the pixel to a color different from the first color pixel; in the second waveform diagram S101, the first or second reproduction waveform 11 or 16 drives the pixel to a color different from the second color pixel. The pixel is driven to a color different from the target pixel by the first reverse display waveform 11 or the second reverse display waveform 16, and then is continuously refreshed to the target pixel color by the plurality of groups of micro-driving waveforms 710. The continuous driving time of each set of micro-drive waveforms 710 in this embodiment is less than the continuous driving time of a single first reproduction waveform 11 or second reproduction waveform 16.
In this embodiment, the first reproduction waveform 11 is driven first and then the second reproduction waveform 16 is driven. And a plurality of groups of refreshing waveforms are also included between the first reverse display waveform 11 and the second reverse display waveform 16, the refreshing waveforms comprise a positive waveform 13 and a negative waveform 12, and the positive waveform 13 and the negative waveform 12 are alternately performed. The refresh waveform may begin with a positive waveform 13 or a negative waveform 12. And in the driving process, the residual image can be better eliminated by continuously refreshing the refreshing waveform.
In a preferred embodiment, when the first anti-aliasing waveform 11 drives a pixel to a different color than the first color pixel, the second anti-aliasing waveform 16 is not driven, and when the first anti-aliasing waveform 11 is not driven, the second anti-aliasing waveform 16 drives a pixel to a different color than the first color pixel; when the first anti-aliasing waveform 11 drives a pixel to a different color than a pixel of the second color, the second anti-aliasing waveform 16 does not drive, and when the first anti-aliasing waveform 11 does not drive, the second anti-aliasing waveform 16 drives a pixel to a different color than a pixel of the second color.
In the preferred embodiment, the time of the first reproduction waveform 11, the time of the second reproduction waveform 16, the sum of the times of the sets of micro drive waveforms 710 and the sum of the times of the sets of stop drive waveforms are the same. That is, T1+ T3+ T5+ T7 ═ T2+ T4+ T6+ T8 ═ the time of the first reflection waveform 11 ═ the time of the second reflection waveform 16. And realizing driving balance.
In a preferred embodiment, the first reproduced waveform 11 in the first waveform diagram S102 is different in driving voltage from the first reproduced waveform 11 in the second waveform diagram S101; the second waveform 16 in the first waveform diagram S102 is different from the second waveform 16 in the second waveform diagram S101 in the driving voltage.
For example, the following are several cases: of course, the present invention is not limited to the following two cases.
When the first reverse waveform 11 in the first waveform diagram S102 is not driven, the first reverse waveform 11 in the second waveform diagram S101 drives the pixel to a color different from the second color pixel; the second anti-aliasing waveform 16 in the second waveform diagram is not driven and the first anti-aliasing waveform 11 in the first waveform diagram S102 drives the pixel to a different color than the first color pixel.
When the first anti-aliasing waveform 11 in the first waveform diagram S102 drives the pixel to a color different from the first color pixel, the first anti-aliasing waveform 11 in the second waveform diagram S101 is not driven, the second anti-aliasing waveform 16 in the second waveform diagram is driven to a color different from the second color pixel, and the first anti-aliasing waveform 11 in the first waveform diagram S102 is not driven.
In a preferred embodiment, before the micro-driving waveform and the stop driving waveform are driven, a plurality of groups of refresh waveforms are further included, the refresh waveforms include a positive waveform 13 and a negative waveform 12, and the positive waveform 13 and the negative waveform 12 are alternately performed. The continuous drive time for each set of microdrive waveforms 710 in this embodiment is less than the continuous drive time for a single positive waveform 13 and negative waveform 12.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A driving method of a two-color electrophoretic display, comprising the steps of:
the first waveform image drives the pixel to a first color pixel;
the second waveform image drives the pixel to a second color pixel;
the first waveform diagram and the second waveform diagram each include a plurality of sets of micro-drive waveforms for driving a pixel to a target pixel and a plurality of sets of stop-drive waveforms, the stop-drive waveforms being non-driven, the micro-drive waveforms and the stop-drive waveforms being alternated,
in a setting driving display stage, when the waveform in the first waveform diagram is a micro-driving waveform, the waveform in the second waveform diagram at the same driving time is a stop driving waveform; and when the waveform in the first waveform diagram is a stop driving waveform, the waveform in the second waveform diagram at the same driving time is a micro driving waveform.
2. The method of driving a dual-color electrophoretic display as claimed in claim 1, wherein the front driving waveforms are set to an n-1 th group, the rear driving waveforms are set to an nth group, and a waveform time of the n-1 th group of the micro driving waveforms is longer than a waveform time of the nth group of the micro driving waveforms; the waveform time of the n-1 th group stop driving waveform is longer than that of the nth group stop driving waveform.
3. A method of driving a dual color electrophoretic display as claimed in claim 1, wherein a sum of waveform times of the plurality of sets of micro drive waveforms is equal to a sum of waveform times of the plurality of sets of stop drive waveforms.
4. A method of driving a dual color electrophoretic display as claimed in claim 1, wherein the waveform times of the single set of microdrive waveforms and the single set of rest drive waveforms are equal.
5. The method of driving a dual color electrophoretic display of claim 1, wherein the first and second waveform diagrams further comprise first and second anti-coloring waveforms, the first waveform diagram wherein either the first or second anti-coloring waveforms drive the pixels to a different color than the first color pixels; in the second waveform diagram, the first reverse waveform or the second reverse waveform drives the pixel to a color different from the second color pixel.
6. The method of driving a dual color electrophoretic display of claim 5, wherein when the first anti-aliasing waveform drives a pixel to a different color than a first color pixel, a second anti-aliasing waveform is not driven, and when the first anti-aliasing waveform is not driven, the second anti-aliasing waveform drives a pixel to a different color than the first color pixel; when the first reverse rendering waveform drives the pixel to a color different from the second color pixel, the second reverse rendering waveform is not driven, and when the first reverse rendering waveform is not driven, the second reverse rendering waveform drives the pixel to a color different from the second color pixel.
7. The method of driving a dual-color electrophoretic display according to claim 5, wherein the time of the first reverse waveform, the time of the second reverse waveform, the time sum of the plurality of sets of micro-driving waveforms and the time sum of the plurality of sets of stop-driving waveforms are the same.
8. The driving method of a two-color electrophoretic display according to claim 5, wherein the first reverse waveform in the first waveform diagram is different from the first reverse waveform in the second waveform diagram in driving voltage; the second waveform in the first waveform diagram is different from the second waveform in the second waveform diagram in driving voltage.
9. The driving method of a dual color electrophoretic display according to claim 1, further comprising a plurality of sets of refresh waveforms before the micro-driving waveforms and the stop driving waveforms are driven, the refresh waveforms comprising positive waveforms and negative waveforms, the positive waveforms and the negative waveforms alternating.
10. The method of driving a two-color electrophoretic display of claim 1, wherein the first color pixels are white and the second color pixels are black.
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| CN102074200A (en) * | 2003-03-31 | 2011-05-25 | 伊英克公司 | Methods for driving bistable electro-optic displays |
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