CN114078449B - Driving device and driving method for electronic paper display panel and display device - Google Patents

Driving device and driving method for electronic paper display panel and display device Download PDF

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Publication number
CN114078449B
CN114078449B CN202111392597.5A CN202111392597A CN114078449B CN 114078449 B CN114078449 B CN 114078449B CN 202111392597 A CN202111392597 A CN 202111392597A CN 114078449 B CN114078449 B CN 114078449B
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pulse signal
duration
pulse
display area
sub
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CN114078449A (en
Inventor
王冬
王敏
华刚
王光泉
邓立广
王哲
李少波
胡锦堂
刘景昊
苏少凯
潘靓靓
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms

Abstract

The embodiment of the invention discloses a driving device, a driving method and a display device for an electronic paper display panel. In a specific embodiment, the electronic paper display panel comprises a display area and a virtual display area for displaying a solid-color picture, wherein the display area comprises pixel units which are arranged in an array manner, the pixel units comprise first pixel electrodes, and the virtual display area comprises second pixel electrodes; the driving device includes: the first driving module is used for respectively sending first pulse signals to the first pixel electrodes arranged in the array in the writing stage of each picture period so that the display area displays pictures; and the second driving module is used for sending a plurality of second pulse signals with a first set interval to the second pixel electrode in the writing stage of each picture period so that the virtual display area displays a pure-color picture. The embodiment can avoid the failure of the paper film in the virtual display area on the basis of not influencing the display in the virtual display area.

Description

Driving device and driving method for electronic paper display panel and display device
Technical Field
The invention relates to the technical field of display, in particular to a driving device and driving method for an electronic paper display panel and a display device.
Background
The prior art electronic paper display technology mainly uses the principle of electrophoretic display (Electrophoretic Display, EPD) to display the color of particles on the display side by driving two different electrically dyed particles to reciprocate. After power failure, the particles can remain in place and exhibit a "steady state". Among them, there are more common three-color isoelectric mixed display products of black (positive electricity), white (negative electricity) and red (positive electricity).
A virtual display area (a Border area, for example, a ring shape surrounding the display area) outside the display area generally displays a solid-color picture, and a driving waveform of the virtual display area displaying the solid-color picture is similar to that of the display area displaying the solid-color picture. The inventor finds that the virtual display area is continuously acted by high-level voltage, so that when particles move to the top end, the particles still continuously act by redundant pushing force, and the top particles continuously squeeze the edge paper film, so that the characteristics change, the particles cannot move finally, the paper film at the area of the virtual display area is invalid, and the electronic paper display device is poor, particularly in a high-temperature and high-humidity environment, and the poor is more likely to happen.
Disclosure of Invention
The invention aims to provide a driving device, a driving method and a display device for an electronic paper display panel, which are used for solving at least one of the problems existing in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the first aspect of the present invention provides a driving device for an electronic paper display panel, where the electronic paper display panel includes a display area and a virtual display area for displaying a solid-color picture, the display area includes pixel units arranged in an array, the pixel units include a first pixel electrode, and the virtual display area includes a second pixel electrode;
the driving device includes:
the first driving module is used for respectively sending first pulse signals to the first pixel electrodes arranged in the array in the writing stage of each picture period so that the display area displays pictures;
and the second driving module is used for sending a plurality of second pulse signals with a first set interval to the second pixel electrode in the writing stage of each picture period so that the virtual display area displays a pure-color picture.
Optionally, the picture period further comprises a reverse phase preceding the writing phase,
the first driving module is further used for sending a third pulse signal to the first pixel electrodes arranged in the array at a reverse stage;
the second driving module is further configured to send a plurality of fourth pulse signals with a second set interval to the second pixel electrode in a reverse phase.
Optionally, the picture period further comprises an active phase between the reverse phase and the write phase,
the first driving module is further used for sending a fifth pulse signal with a third set interval and alternating polarity to the first pixel electrodes arranged in the array in an activation stage;
the second driving module is further configured to send, in an activation phase, a sixth pulse signal group with polarity alternation having a third set interval to the second pixel electrode, where each sixth pulse signal group includes a plurality of sixth pulse signals with same polarity having a fourth set interval.
Optionally, the activation phase comprises a first activation sub-phase and a second activation sub-phase subsequent to the first activation sub-phase, the fifth pulse signal comprises a first fifth pulse sub-signal and a second fifth pulse sub-signal, the sixth pulse signal group comprises a first sixth pulse signal sub-group and a second sixth pulse signal sub-group,
the first driving module is configured to send, in a first activation sub-stage, a first fifth pulse sub-signal with a fifth set interval and alternating polarity to a first pixel electrode arranged in an array, and send, in a second activation sub-stage, a second fifth pulse sub-signal with a sixth set interval and alternating polarity to a first pixel electrode arranged in the array, where a duration of the first fifth pulse sub-signal is less than a duration of the second fifth pulse sub-signal, and the fifth set interval is less than the sixth set interval;
The second driving module is configured to send, in a first activation sub-stage, a first sixth pulse signal subgroup with polarity alternation having a fifth set interval to the second pixel electrode, and send, in a second activation sub-stage, a second sixth pulse signal subgroup with polarity alternation having a sixth set interval to the second pixel electrode, where a duration of the first sixth pulse signal subgroup is smaller than a duration of the second sixth pulse signal subgroup, and each of the first sixth pulse signal subgroup and each of the second sixth pulse signal subgroup includes a plurality of sixth pulse signals having a fourth set interval.
Optionally, the duration of the single second pulse signal is longer than the duration of the single first pulse signal;
in the presence of the fourth pulse signal, the time length of the single fourth pulse signal is longer than the time length of the single first pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is longer than the duration of the single first pulse signal.
Optionally, the value range of the duration of the single second pulse signal is 2-3 times of the duration of the single first pulse signal;
under the condition that the fourth pulse signal exists, the value range of the duration of the single fourth pulse signal is 2-3 times of the duration of the single first pulse signal;
In the case where the sixth pulse signal is present, the duration of the single sixth pulse signal has a value ranging between 2-3 times the duration of the single first pulse signal.
Optionally, in the presence of the fourth pulse signal, the duration of the single fourth pulse signal is equal to the duration of the single second pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is equal to the duration of the single second pulse signal.
Optionally, the writing phase includes a plurality of frame periods, wherein each frame period in the frame periods required to be driven with the second pulse signal includes a period of the second pulse signal and a period of the first set interval, respectively;
in the case where there is a reverse phase, the reverse phase includes a plurality of frame periods, each frame period in the frame periods required to be driven with a fourth pulse signal includes a period of the fourth pulse signal and a period of the second set interval, respectively;
in the case where there is an active phase, the active phase includes a plurality of frame periods, and each frame period in the frame periods required to be driven with a sixth pulse signal includes a period of the sixth pulse signal and a period of the fourth set interval, respectively.
Optionally, in each frame period, the total duration of the plurality of second pulse signals and the first set interval is equal to the total duration of the first pulse signals sent by the first driving module to a column of the first pixel electrodes when the solid-color frame is displayed in the display area.
A second aspect of the present invention provides an electronic paper display device comprising an electronic paper display panel and a driving device according to the first aspect of the present invention.
The third aspect of the present invention provides a driving method for an electronic paper display panel, where the electronic paper display panel includes a display area and a virtual display area for displaying a solid-color picture, the display area includes pixel units arranged in an array, the pixel units include a first pixel electrode, and the virtual display area includes a second pixel electrode;
the driving method includes:
and in the writing stage of each picture period, a first pulse signal is sent to the first pixel electrodes arranged in an array, and a second pulse signal with a first set interval is sent to the second pixel electrodes, so that the display area displays pictures in each picture period and the virtual display area displays solid-color pictures in each picture period.
Optionally, the picture period further includes a reverse phase before the writing phase, and the driving method further includes:
And transmitting a third pulse signal to the first pixel electrodes arranged in the array and transmitting a plurality of fourth pulse signals with a second set interval to the second pixel electrodes in the reverse stage.
Optionally, the picture period further comprises an active phase between the reverse phase and the write phase,
and transmitting fifth pulse signals with third set intervals and with alternating polarities to the first pixel electrodes arranged in the array in the activation stage, and transmitting sixth pulse signal groups with third set intervals and with alternating polarities to the second pixel electrodes in the activation stage, wherein each sixth pulse signal group comprises a plurality of sixth pulse signals with fourth set intervals and with the same polarities.
Optionally, the activation phase comprises a first activation sub-phase and a second activation sub-phase subsequent to the first activation sub-phase, the fifth pulse signal comprises a first fifth pulse sub-signal and a second fifth pulse sub-signal, the sixth pulse signal group comprises a first sixth pulse signal sub-group and a second sixth pulse signal sub-group,
the transmitting the fifth pulse signal with the third set interval and the sixth pulse signal group with the third set interval and the polarity alternation to the first pixel electrode arranged in the array in the activation stage comprises the following steps:
Transmitting a first fifth pulse sub-signal with alternating polarity and a fifth set interval to a first pixel electrode arranged in an array in a first activation sub-stage, and transmitting a second fifth pulse sub-signal with alternating polarity and a sixth set interval to the first pixel electrode arranged in the array in a second activation sub-stage, wherein the duration of the first fifth pulse sub-signal is smaller than that of the second fifth pulse sub-signal, and the fifth set interval is smaller than that of the sixth set interval;
and transmitting a first and a sixth pulse signal sub-groups with polarity alternation of a fifth set interval to the second pixel electrode in the first activation sub-stage, and transmitting a second and a sixth pulse signal sub-groups with polarity alternation of a sixth set interval to the second pixel electrode in the second activation sub-stage, wherein the duration of the first and the sixth pulse signal sub-groups is smaller than that of the second and the sixth pulse signal sub-groups, each of which comprises a plurality of sixth pulse signals with a fourth set interval.
Optionally, the duration of the single second pulse signal is longer than the duration of the single first pulse signal;
in the presence of the fourth pulse signal, the time length of the single fourth pulse signal is longer than the time length of the single first pulse signal;
In the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is longer than the duration of the single first pulse signal.
Optionally, the value range of the duration of the single second pulse signal is 2-3 times of the duration of the single first pulse signal;
under the condition that the fourth pulse signal exists, the value range of the duration of the single fourth pulse signal is 2-3 times of the duration of the single first pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal has a value ranging between 2-3 times the duration of the single first pulse signal.
Optionally, in the presence of the fourth pulse signal, the duration of the single fourth pulse signal is equal to the duration of the single second pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is equal to the duration of the single second pulse signal.
Optionally, the writing phase includes a plurality of frame periods, wherein each frame period in the frame periods required to be driven with the second pulse signal includes a period of the second pulse signal and a period of the first set interval, respectively;
in the case where there is a reverse phase, the reverse phase includes a plurality of frame periods, each frame period in the frame periods required to be driven with a fourth pulse signal includes a period of the fourth pulse signal and a period of the second set interval, respectively;
In the case where there is an active phase, the active phase includes a plurality of frame periods, and each frame period in the frame periods required to be driven with a sixth pulse signal includes a period of the sixth pulse signal and a period of the fourth set interval, respectively.
Optionally, in each frame period, a total duration of the plurality of second pulse signals and the first set interval is equal to a total duration of the first pulse signals sent to a column of the first pixel electrodes when the solid-color frame is displayed in the display area.
The beneficial effects of the invention are as follows:
according to the technical scheme, for a display area of first pixel electrodes which are arranged in an array mode through progressive scanning driving, a first driving module is used for respectively sending first pulse signals to the first pixel electrodes which are arranged in the array mode in a writing stage of each picture period so that pictures can be displayed in the display area; for the virtual display area adopting the integral second pixel electrode, a plurality of second pulse signals with a first set interval are sent to the second pixel electrode through the second driving module in the writing stage of each picture period, so that the virtual display area displays a pure-color picture, particles in the virtual display area can reach the top end of a paper film and can not continuously receive the action of excessive pushing force, the continuous extrusion effect can not be generated on the edge paper film, and the paper film failure in the virtual display area can be avoided on the basis that the display of the virtual display area is not influenced.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Fig. 1 shows a schematic diagram of a poor electronic paper product.
Fig. 2 shows a schematic diagram of an electronic paper display panel of the electronic paper display device.
Fig. 3 shows another schematic view of an electronic paper display panel.
Fig. 4 is a schematic diagram showing driving waveforms in a frame period when a display area and a virtual display area of an electronic paper display panel of the three-color electronic paper display device according to an embodiment of the present invention both display a white frame.
Fig. 5 is a schematic diagram showing driving waveforms in a frame period when a display area and a virtual display area of an electronic paper display panel of the three-color electronic paper display device according to an embodiment of the present invention display black frames.
Fig. 6 is a schematic diagram showing driving waveforms in a frame period when a display area and a virtual display area of an electronic paper display panel of the three-color electronic paper display device according to an embodiment of the present invention both display red frames.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to examples and drawings. Like parts in the drawings are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
Electrophoretic display (electrophoretic displays, EPD) is a novel display technology that uses the principle of electrophoresis to move a charged substance sandwiched between electrodes under the action of an electric field, and alternately displays two or more different colors by the movement of the charged substance. The two-dimensional matrix arrangement of the electrophoresis units is carried out by taking one electrophoresis unit as one pixel to form a display plane, and the pixels can display different colors according to the requirement, so that the plane image can be obtained by combining the pixels. The electrophoretic display technology combines the advantages of plain paper and electronic displays, and is thus the most likely technology to realize the industrialization of "electronic paper". The electrophoresis type electronic paper has the following advantages: firstly, the energy consumption is low, because the density of the electrophoresis dyed particles is equivalent to the density of the electrophoresis liquid, after the driving is finished, the electrophoresis particles on the display side can stay on the display side, so that the display characteristic can be kept, the electronic paper product has the display bistable state, and after the power supply is turned off, the image can be kept on the display for days or months; secondly, the display belongs to reflective display, has good sunlight readability, and is more in line with the reading habit of people; thirdly, the preparation cost of the particles is low, and the manufacturing process of the electronic paper is simple, so the electronic paper has the potential of low production cost; fourthly, the electrophoretic display is characterized by flexible shape and can be made on the surface of plastic, metal or glass, so that the electrophoretic display is the best choice of flexible display technology; fifthly, the environment-friendly electronic book has the characteristic of environmental protection, can be manufactured into electronic books, electronic newspapers, electronic journals and the like in the future, and can save a large amount of wood. For the above reasons, electronic paper based on electrophoresis technology will become the mainstream of electronic paper, and is one of the most developed flat panel display technologies.
Common electronic paper includes black/white/red three-color electronic paper, black/white/yellow three-color electronic paper and the like besides black/white two-color electronic paper. For a black/white double-color electronic paper, the writing voltage corresponding to the black particles is generally +15v, and the writing voltage corresponding to the white particles is-15V (or the writing voltage corresponding to the black particles is-15V, and the writing voltage corresponding to the white particles is +15v). The three-color electronic paper generally prepares the electrophoretic mobility of the color particles different from that of other color particles with the same electrical property through the matching of different charge-mass ratios, and writes the colors through voltages with different amplitude values.
As shown in fig. 1, in the conventional electronic paper product, 11 is a paper film blackening area in a virtual display area, 12 is a paper film non-refreshing area in the virtual display area, in a high-temperature and high-humidity environment, the reject ratio of the failure of part of the paper film in the virtual display area of the electronic paper product is up to 35%, the inventor finds that the reject ratio of the paper film in the virtual display area is as high as 35%, the paper film in the display area is normal, the paper film above the virtual display area of the reject ratio product is removed, and the virtual display area of the electronic paper display panel of the electronic paper display device is observed, as shown in fig. 2, the virtual display area is located in the leftmost two columns of pixel areas and the bottommost two rows of pixel areas 21 in the left lower corner area of the electronic paper display panel shown in fig. 2, the virtual display area ITO is complete and has no abnormal area, and after the paper film is replaced, the virtual display area can be refreshed normally, so that the reason of the electronic paper display panel is not caused; in addition, if the virtual display area is corroded by water vapor, only the virtual display area cannot be corroded, and the AA area is also affected by corrosion due to obvious demarcation. Therefore, the inventor considers that the reason is that the driving waveform of the virtual display area for displaying the solid-color picture is similar to the driving waveform of the display area for displaying the solid-color picture, so that the virtual display area is continuously acted by high-level voltage, and the effect of redundant pushing force is still continuously acted when the particles move to the top end, the top particles continuously squeeze the edge paper film, so that the characteristics change, the particles cannot move finally, the paper film in the area of the virtual display area is invalid, and the defect of the electronic paper display device is more likely to occur, particularly in the high-temperature and high-humidity environment, and can be solved through the design of the driving waveform on the virtual display area.
The inventors believe that the reason why the above-mentioned defects occur in the virtual display area and the display area paper film is normal is that: the electronic paper display panel includes a display area (AA area) and a virtual display area (Border area, which may be simply referred to as BD area) surrounding the display area. The display area drives and displays different colors according to the voltage sequence applied to the pixel electrode, and the different colors are combined to obtain a planar image; in order to avoid that no display picture appears outside the virtual display area, the beauty of the product after the module is affected, the virtual display area is usually displayed as a pure-color picture, and when the virtual display area is white, the driving waveform of the virtual display area is similar to the driving waveform of each data line when the display area displays the pure-white picture; when the virtual display area is black, the driving waveform is similar to that of each data line when the display area is a pure black picture. The driving waveform of the virtual display area for displaying the solid-color picture is similar to the driving waveform of each data line when the display area displays the solid-color picture, but the driving principle is different, specifically:
the display area is actively driven and is turned on line by line (i.e. displayed in a line scanning manner), so that in a frame of picture, the turn-on time T of each line is t=one frame time/line number;
The virtual display area is provided with a TFT, but is not connected with a switch of the TFT, so that the virtual display area is driven passively, pixel electrodes of the virtual display area are all connected together to form an integral pixel electrode, the waveform of the virtual display area displays a pure-color picture, the waveform of the virtual display area is similar to the driving waveform of each data line when the virtual display area displays the pure-color picture, in one frame picture, the virtual display area is continuously acted by high-level voltage, and is still continuously acted by excessive pushing force when particles move to the top end, the top particles continuously squeeze the edge paper film, so that characteristics change, the particles cannot move finally, and part of the paper film in the area of the virtual display area is invalid.
In contrast, the driving waveform of each data line when the display area displays the solid-color picture is similar to that of the virtual display area, but the action time of the paper film (opened row by row) in the display area is far shorter than that of the virtual display area, so that the display area does not have the defects.
In view of this, in order to solve the above-mentioned disadvantages of the virtual display area by designing the driving waveform on the virtual display area, an embodiment of the present invention provides a driving device for an electronic paper display panel, as shown in fig. 3, where the electronic paper display panel includes a display area 310 and a virtual display area for displaying a solid-color picture, the display area includes pixel units arranged in an array, the pixel units include a first pixel electrode 311, the virtual display area includes a second pixel electrode 321, and the display area is within a dashed line frame in fig. 3, and a position projection of the virtual display area corresponds to the second pixel electrode 321;
The driving device includes:
a first driving module 331, configured to send a first pulse signal to the first pixel electrodes 311 arranged in the array during a writing phase of each frame period, so that the display area displays a frame;
the second driving module 332 is configured to send a plurality of second pulse signals with a first set interval to the second pixel electrode 321 in a writing phase of each frame period, so that the virtual display area displays a solid-color frame.
For example, as shown in fig. 3, the electronic paper display panel is provided with a plurality of first data lines 341 and a plurality of gate lines (scan lines) 343, one first data line 341 is connected to a first pole such as a drain of a thin film transistor TFT (not shown in fig. 3) of a column of pixel units, a second pole such as a source of the TFT of a pixel unit is connected to the first pixel electrode 311, one gate line 343 is connected to a gate of the thin film transistor TFT of a row of pixel units, and the driving apparatus further includes a gate driving circuit 333 for transmitting a gate signal to each gate line 343 during a row scan. In each screen period, the gate driving circuit 333 scans the pixel units line by line (turns on the TFTs of the pixel units line by line) through the gate lines 343, and during the line by line scanning, the first driving module 331 transmits a pulse signal (pixel voltage) to the first pixel electrodes 311 of the pixel units through the first data lines 341. The electronic paper display panel is further provided with a second data line 342, and in each frame period, the second driving module 332 transmits a pulse signal to the second pixel electrode 321 of the virtual display area through the second data line 342.
In one possible implementation, one picture period includes a plurality of frame periods, each including a reverse phase, an active phase, and a write phase that are sequentially performed, wherein the reverse phase of one picture period includes a plurality of frame periods, the active phase of one picture period includes a plurality of frame periods, and the write phase of one picture period also includes a plurality of frame periods. The reverse phase is a preprocessing phase for balancing charges from the start to the subsequent writing phase to the reverse driving voltage (in addition, the reverse phase can be set as a preprocessing phase for balancing accumulated charges from the display of the electronic paper display device to the current display time) so as to keep conservation of charges; the activation stage comprises a plurality of positive and negative pressure alternating periods so as to fully mix the charged particles and uniformly disperse the electrophoretic particles in the microstructure; and a writing stage for applying a driving voltage for a certain time (frame number) to complete the display of the electrophoretic particles.
In a specific example, the driving device comprises a first driving module and a second driving module, wherein the first driving module sends pulse signals to first pixel electrodes arranged in an array in a progressive scanning driving mode to drive a display area of the electronic paper display device to display pictures; the second driving module sends pulse signals to the second pixel electrode in a driving mode of a plurality of narrow pulses at intervals so as to drive a virtual display area of the electronic paper display device to display a solid-color picture.
For example, the electronic paper display device provided in this embodiment is a black/white/red three-color electronic paper, for example, the writing voltage corresponding to the black particles is +15v, the writing voltage corresponding to the red particles is +6v, and the writing voltage corresponding to the white particles is-15V. When the images to be refreshed have three colors of black, white and red at the same time, the display area can display the display images with three different colors of black, white and red, and the virtual display area can display the pure-color images with any one of the three different colors of black, white and red.
Next, as shown in waveforms a, b and c in fig. 4, a pure white screen is displayed in both the display area and the virtual display area of the three-color electronic paper display panel.
In the writing stage of one frame period, the first driving module applies a first pulse signal to the first pixel electrodes arranged in an array, the waveform a shows the first pulse signal applied to one first pixel electrode by the first driving module, as shown in the waveform a, the applied first pulse signal 411 is-15V, and the first pulse signal 411 is used for enabling the white particles to be close to the display side of the display area, so that the display area displays a white frame. When each row of pixel units is scanned, the first driving module applies a-15V first pulse signal 411 to each first pixel electrode connected to the data line, and then the pulse signal waveform of one data line in the writing stage of one frame period is shown as a waveform b (the driving waveform of the existing virtual display area when displaying a pure white frame is similar to the waveform b), and a plurality of-15V first pulse signals 411 form a pulse signal with a wider duration. In the writing phase of one frame period, the waveform c shows a second pulse signal applied to the second pixel electrode by the second driving module, as shown in the waveform c, the second driving module applies a plurality of second pulse signals 421 with a first set interval to the second pixel electrode, the applied second pulse signals 421 are-15V, and the second pulse signals 421 are used for making the white particles approach to the display side of the virtual display area, so that the virtual display area displays the white frame.
In a specific example, since the storage capacitor Cst does not exist in the virtual display area, in this embodiment, the duration of the single second pulse signal applied is appropriately longer than the duration of the single first pulse signal applied in the display area.
In one possible implementation, the duration of the single second pulse signal is greater than the duration of the single first pulse signal, e.g., as shown in fig. 4, and the duration of the single second pulse signal 421 is greater than the duration of the single first pulse signal 411.
In one possible implementation, the duration of the single second pulse signal ranges between 2-3 times the duration of the single first pulse signal.
In one possible implementation, each frame period of the frame periods required to be driven with the second pulse signal includes a period of the second pulse signal and a period of the first set interval, respectively.
In one possible implementation manner, in the writing stage of each frame period, a total duration of the plurality of second pulse signals and the first set interval is equal to a total duration of the first pulse signals sent by the first driving module to the first pixel electrode in a row when the pure color frame is displayed in the display area. For example, as shown in fig. 4, in the writing phase of one frame period in which the display area and the virtual display area each display a white frame, the overall duration of the plurality of second pulse signals 421 having the first set intervals shown in the waveform c and the first set intervals is equal to the duration of the waveform b.
In a specific example, assuming that the refresh frequency of the electronic paper of the present embodiment is 50Hz and the number of rows of pixel units in the display area is 100 rows, in fig. 4, one frame period (one frame period) is 0.02s (1 s/50=0.02 s), the on time of each row in the display area is 0.0002s (0.02 s/100=0.0002 s), the total duration of the first pulse signal in the display area in the writing stage shown in waveform b is 1s, and the pulse level is-15V; the duration of the single second pulse signal 421 in the virtual display area is 2-3 times, for example, 2.5 times, the duration of the single first pulse signal 421 in the virtual display area is 0.0005s, one frame period is 0.02s, and the first set interval is 0.0195s. It will be appreciated that in practice the ratio between the duration 0.0002s of the single second pulse signal 411 and the total duration 1s of the first pulse signal of the display area of the writing phase shown by waveform b should be much smaller than shown in fig. 4, which is only illustrative.
In one possible implementation, the picture period further comprises a reverse phase preceding the writing phase,
the first driving module is further configured to send a third pulse signal to the first pixel electrodes arranged in the array in a reverse phase of each frame period;
The second driving module is further configured to send a plurality of fourth pulse signals with a second set interval to the second pixel electrode in an inverse phase of each frame period.
For the display area of the first pixel electrodes which are arranged in the array in a progressive scanning driving mode, a first driving module is used for respectively sending third pulse signals to the first pixel electrodes which are arranged in the array in the reverse phase of the picture period so as to enable the display area to keep charge conservation; for the virtual display area adopting the integral second pixel electrode, a plurality of fourth pulse signals with a second set interval are sent to the second pixel electrode through the second driving module in the reverse phase of the picture period, so that the virtual display area keeps conservation of charge, and the paper film failure in the area of the virtual display area can be avoided in the reverse phase.
Continuing with the above example, as shown in fig. 4, in the reverse phase of one frame period, the first driving module applies the third pulse signal 412 to the first pixel electrodes arranged in an array, the applied third pulse signal 412 is +15v, and the third pulse signal 412 is used to balance the-15V applied in the subsequent writing phase to maintain charge conservation. In the reverse phase of one frame period, the second driving module applies a plurality of fourth pulse signals 422 with a second set interval to the second pixel electrode, the fourth pulse signals 422 applied are +15v, and the fourth pulse signals 422 are used for balancing-15V in the subsequent writing phase to maintain charge conservation.
In one possible implementation manner, the total duration of the fourth pulse signals and the second set intervals is equal to the total duration of the first pulse signals sent by the first driving module to a column of the first pixel electrodes when the solid-color picture is displayed in the display area, as shown in fig. 4.
It is understood that the duration of the single third pulse signal sent by the first driving module is the same as the duration of the single first pulse signal. Since the virtual display area does not have a storage capacitance, the duration of a single fourth pulse signal applied is suitably longer than the duration of a single third pulse signal applied in the display area.
In one possible implementation, the duration of a single fourth pulse signal is greater than the duration of a single third (first) pulse signal.
In one possible implementation, the duration of the single fourth pulse signal ranges between 2-3 times the duration of the single third (first) pulse signal.
In one possible implementation, each frame period of the frame periods required to be driven with the fourth pulse signal includes a period of the fourth pulse signal and a period of the second set interval, respectively.
In one possible implementation, the duration of the single fourth pulse signal is equal to the duration of the single second pulse signal.
Continuing with the above example, in fig. 4, the duration of the single third pulse signal 412 is 0.0002s, the range of the duration of the single fourth pulse signal 422 is 2-3 times, for example, 2.5 times, the duration of the fourth pulse signal 422 in the virtual display area is 0.0005s, one frame period is 0.02s, and the second set interval is 0.0195s.
In one possible implementation, the picture period further comprises an activation phase between the reverse phase and the write phase,
the first driving module is further configured to send a fifth pulse signal with a third set interval and alternating polarity to the first pixel electrodes arranged in the array in an activation stage of each frame period;
the second driving module is further configured to send, to the second pixel electrode during an activation phase of each frame period, a sixth pulse signal group with polarity alternating with a third setting interval, where each sixth pulse signal group includes a plurality of sixth pulse signals with same polarity and with a fourth setting interval.
For the display area of the first pixel electrodes which are arranged in the array in a progressive scanning driving mode, a fifth pulse signal with a third set interval and alternating polarity is respectively sent to the first pixel electrodes arranged in the array in an activating stage of a picture period through a first driving module, so that charged particles in the display area are uniformly dispersed; for the virtual display area adopting the integral second pixel electrode, a sixth pulse signal group with a third set interval and alternating polarity is sent to the second pixel electrode through the second driving module in the activation stage of the picture period, so that charged particles in the virtual display area are uniformly dispersed, and the paper film failure in the area of the virtual display area can be avoided in the activation stage.
By combining the scheme, the effect of paper film failure in the virtual display area can be improved by adopting a mode of a plurality of pulse signals with set intervals in the reverse phase, the activation phase and the writing phase respectively.
In a specific example, after the sub-pixels displaying white are synchronously reversed in the reversing phase, common zero voltage (at least one frame of zero-crossing phase) is arranged, so that the particles can be buffered and reversed to the activating process more stably, the particles can keep inertia on one hand, and the reversing effect can be consolidated stably by using one frame of time; on the other hand, the driving abnormality caused by the instant entering of the activation stage of the rapid high-low voltage abrupt change is avoided.
Continuing the above example, in the activation stage of one frame period, the first driving module applies a fifth pulse signal with polarity alternation with a third set interval to the first pixel electrodes arranged in the array, that is, applies a plurality of fifth pulse signals with polarity alternation with a third set interval in one frame period, and applies +15v voltage and then-15V voltage for polarity alternation so as to fully mix the charged particles and make the electrophoretic particles in the microstructure uniformly dispersed; the second driving module applies a sixth pulse signal group with alternating polarity having a third set interval to the second pixel electrode, that is, applies a plurality of sixth pulse signal groups with alternating polarity having a third set interval in one frame period, and applies +15v voltage and then-15V voltage to the polarity alternation so as to fully mix the charged particles and uniformly disperse the electrophoretic particles in the microstructure, wherein each sixth pulse signal group comprises a plurality of sixth pulse signals with the same polarity having a fourth set interval.
In a specific example, the duration of the single fifth pulse signal, the duration of the single third pulse, and the duration of the single first pulse transmitted by the first driving module are the same, and since the virtual display area does not have a storage capacitor, the duration of the single sixth pulse signal applied is appropriately longer than the duration of the single fifth pulse signal applied in the display area.
In one possible implementation, the duration of a single sixth pulse signal is greater than the duration of a single fifth (first) pulse signal.
In a possible implementation, the duration of the single sixth pulse signal ranges between 2-3 times the duration of the single fifth (first) pulse signal.
In one possible implementation, each frame period in the frame periods required to be driven with the sixth pulse signal includes a period of the sixth pulse signal and a period of the fourth set interval, respectively.
In one possible implementation, the duration of the single second pulse signal, the duration of the single fourth pulse signal, and the duration of the single sixth pulse signal are the same and greater than the duration of the single first pulse signal, the duration of the single third pulse signal, and the duration of the single fifth pulse signal.
Continuing with the above example, the duration of the single fifth pulse signal 413 is 0.0002s, the value of the duration of the single sixth pulse signal 423 ranges between 2-3 times, for example, 2.5 times, the duration of the sixth pulse signal 423 in the virtual display area is 0.0005s, one frame period is 0.02s, and the fourth set interval is 0.0195s.
In a possible implementation, the activation phase comprises a first activation sub-phase and a second activation sub-phase subsequent to the first activation sub-phase, the fifth pulse signal comprises a first fifth pulse sub-signal and a second fifth pulse sub-signal, the sixth pulse signal group comprises a first sixth pulse signal sub-group and a second sixth pulse signal sub-group,
the first driving module is configured to send, in a first activation sub-stage, a first fifth pulse sub-signal with a fifth set interval and alternating polarity to a first pixel electrode arranged in an array, and send, in a second activation sub-stage, a second fifth pulse sub-signal with a sixth set interval and alternating polarity to a first pixel electrode arranged in the array, where a duration of the first fifth pulse sub-signal is less than a duration of the second fifth pulse sub-signal, and the fifth set interval is less than the sixth set interval;
The second driving module is configured to send, in a first activation sub-stage, a first sixth pulse signal subgroup with polarity alternation having a fifth set interval to the second pixel electrode, and send, in a second activation sub-stage, a second sixth pulse signal subgroup with polarity alternation having a sixth set interval to the second pixel electrode, where a duration of the first sixth pulse signal subgroup is smaller than a duration of the second sixth pulse signal subgroup, and each of the first sixth pulse signal subgroup and each of the second sixth pulse signal subgroup includes a plurality of sixth pulse signals having a fourth set interval.
In a specific example, as shown in waveforms a, b and c in fig. 4, the activation phase includes an activation phase one and an activation phase two, and the first driving module transmits a first fifth pulse sub-signal having polarity alternation of a fifth set interval to the first pixel electrodes arranged in the array in the activation phase; the second driving module sends a first pulse signal subgroup with polarity alternation with a fifth set interval to the second pixel electrode in an activation phase, wherein the duration of the first driving module acting in the activation phase is the same as the duration of the second driving module acting in the activation phase.
The first driving module sends second and fifth pulse sub-signals with polarity alternation of sixth set intervals to the first pixel electrodes arranged in an array in an activation stage, and the second driving module sends second and sixth pulse signal sub-groups with polarity alternation of sixth set intervals to the second pixel electrodes in the activation stage, wherein the duration of the second action of the first driving module in the activation stage is the same as the duration of the first action of the second driving module in the activation stage. A duration of the first fifth pulse sub-signal is less than a duration of the second fifth pulse sub-signal (a duration of each combination of the single first fifth pulse sub-signal in polarity alternation is less than a duration of each combination of the single second fifth pulse sub-signal in polarity alternation), the fifth set interval being less than the sixth set interval; the duration of the first sixth pulse signal subgroup is smaller than that of the second sixth pulse signal subgroup, and each first sixth pulse signal subgroup and each second sixth pulse signal subgroup respectively comprise a plurality of sixth pulse signals with a fourth set interval.
Continuing with the above example, the duration of the single first fifth pulse signal and the single second fifth pulse signal are each 0.0002s.
In the above example, as shown in fig. 4, each of the plurality of frame periods driven with the second pulse signal 421 in the writing stage includes a period 0.0005s of one of the second pulse signals 421 and a period 0.0195s of one of the first set intervals, respectively; each frame period of the frame periods driven with the fourth pulse signal 422 in the reverse phase includes a period 0.0005s of the fourth pulse signal 422 and a period 0.0195s of the second set interval, respectively; each frame period in the frame periods driven with the sixth pulse signal 423 in the active stage includes a period 0.0005s of one of the sixth pulse signal 423 and a period 0.0195s of one of the fourth set intervals, respectively.
In a specific example, the first driving module transmits the third pulse signal 412, the fifth pulse signal 413, and the first pulse signal 411 to the first pixel electrodes arranged in the array in a line-by-line scanning manner in a frame period, and scans all rows of pixel units one time in each frame period for the gate lines (scan lines). Unlike the virtual display area with only one second pixel electrode and one data line, the display area has several data lines, each of which is connected to one row of the first pixel electrodes. As shown in fig. 4, the white particles are negatively charged, and the waveform a is a waveform of a pulse signal applied to one first pixel electrode by the first driving module in one frame period when the display area displays a pure white picture, specifically, a driving waveform of a third pulse signal 412, a fifth pulse signal 413, and a first pulse signal 411 applied to one first pixel electrode by the first driving module in one frame period when the display area displays a pure white picture. Waveform b is a pulse signal waveform of one data line in one frame period when the display area displays a pure white frame (a driving waveform of a conventional virtual display area when displaying a pure white frame is similar to waveform b). The waveform c is a waveform of a pulse signal applied to the second pixel electrode by the second driving module in one frame period when the virtual display area displays a pure white picture in the embodiment of the invention, and specifically is a driving waveform of a fourth pulse signal 422, a sixth pulse signal 423, and a second pulse signal 421 applied to the second pixel electrode by the second driving module in one frame period when the virtual display area displays a pure white picture in the embodiment of the invention. Waveform a shows that the first driving module transmits a third pulse signal 412 of +15v to each first pixel electrode in the reverse phase, transmits a first fifth pulse sub-signal 413 of +15v with polarity equal interval alternation of a fifth set interval to each first pixel electrode in the first activation sub-phase, transmits a second fifth pulse sub-signal 413 of +15v with polarity equal interval alternation of a sixth set interval to each first pixel electrode in the second activation sub-phase, and transmits a first pulse signal 411 of-15V to each first pixel electrode in the write phase so that the display area is in a white screen (for waveform b, the pulse signals transmitted to each data line to a corresponding column of first pixel electrodes are all waveforms b). Waveform c shows that the second driving module transmits a plurality of +15v fourth pulse signals 422 having a second set interval to the second pixel electrode in the reverse phase, transmits a first and a sixth pulse signal subgroup having a polarity of +15v alternating with a fifth set interval to the second pixel electrode in the first activation sub-phase, and transmits a second and a sixth pulse signal subgroup having a polarity of +15v alternating with a sixth set interval to the second pixel electrode in the second activation sub-phase, wherein each of the first and second sixth pulse signal subgroups includes a plurality of +15v or-15v sixth pulse signals 423 having a fourth set interval, respectively, and transmits a plurality of-15V second pulse signals 421 having a first set interval to the second pixel electrode in the write phase such that the virtual display area displays a white picture, wherein a single fourth pulse signal 422, a single sixth pulse signal 423, and a single second pulse signal 412 are the same and the second set interval, the fourth set interval, and the fourth set interval are the same in duration. The parameters of waveform b and waveform c in fig. 3 in the inversion phase, the first active phase (first active sub-phase), the second active phase (second active sub-phase), and the write phase are shown in table 1.
TABLE 1
Figure BDA0003368876740000161
Fig. 5 shows driving waveforms in one frame period when the display area and the virtual display area of the three-color electronic paper display panel both display black images, wherein waveform d is a pulse signal waveform applied to one first pixel electrode by the first driving module in one frame period when the display area displays a pure black image, waveform e is a pulse signal waveform of one data line in one frame period when the display area displays a pure black image (the driving waveform of the conventional virtual display area is similar to waveform e when the display area displays a pure black image), and waveform f is a pulse signal waveform of one data line in one frame period when the display area displays a pure black image. As shown in fig. 5, the black particles are positively charged, and the waveform d shows that the third pulse signal 513 applied to the first pixel electrode by the first driving module in the reverse phase is-15V, the first pulse signal 511 applied to the first pixel electrode in the writing phase is +15v, and the driving waveforms (waveform a) for displaying the white picture in the activation phase and the display area of the three-color electronic paper display panel are identical. The waveform f shows that the second driving module transmits the plurality of fourth pulse signals 522 with the second set interval to the second pixel electrode at-15V in the reverse phase, the plurality of second pulse signals 521 with the first set interval applied to the second pixel electrode at +15v in the writing phase, and the driving waveform (waveform c) for displaying the white picture in the active phase is identical to that in the virtual display area of the three-color electronic paper display panel.
Fig. 6 shows driving waveforms in one frame period when the display area and the virtual display area of the three-color electronic paper display panel both display red images, wherein waveform j is a pulse signal waveform applied to one first pixel electrode by the first driving module in one frame period when the display area displays pure red images, waveform h is a pulse signal waveform of one data line in one frame period when the display area displays pure red images (the driving waveform of the conventional virtual display area when displaying pure red images is similar to waveform h), and waveform i is a pulse signal waveform of one data line in one frame period when the display area displays pure red images. As shown in fig. 6, the red particles are positively charged, but the charge-to-mass ratio of the red particles is smaller than that of the black particles, and the red particles are also charged smaller than that of the black particles, when +6v is supplied to the pixel electrode, the driving force causes the red particles to be pushed and the black particles not to be pushed, so that the waveform j shows that the first driving module applies the-15V third pulse signal 612 to the first pixel electrode in the reverse phase, applies the-15V first pulse signal 612 to the first pixel electrode for a short period of time in the writing phase so that the black particles above move downward without the black particles at the top of the display area, and applies the +6v first pulse signal 612 to the first pixel electrode, and the driving waveforms (waveform a) of displaying white pictures in the activation phase and the display area of the three-color electronic paper display panel are consistent. The waveform i shows that the second driving module transmits the plurality of fourth pulse signals 622 having the second set interval to the second pixel electrode at-15V in the reverse phase, the plurality of second pulse signals 621 having the first set interval applied to the second pixel electrode at-15V in the writing phase and the plurality of second pulse signals 621 having the first set interval applied to the second pixel electrode at +6v later, and the driving waveform (waveform c) of displaying the white screen in the active phase is identical to that in the virtual display area of the three-color electronic paper display panel.
According to the driving device for the electronic paper display panel, for the display area of the first pixel electrodes which are arranged in the array in a progressive scanning driving mode, the first driving module is used for respectively sending first pulse signals to the first pixel electrodes which are arranged in the array in the writing stage of each picture period so that pictures are displayed in the display area; for the virtual display area adopting the integral second pixel electrode, a plurality of second pulse signals with a first set interval are sent to the second pixel electrode through the second driving module in the writing stage of each picture period, so that the virtual display area displays a pure-color picture, particles in the virtual display area can reach the top end of a paper film and can not continuously receive the action of excessive pushing force, the continuous extrusion effect can not be generated on the edge paper film, and the paper film failure in the virtual display area can be avoided on the basis that the display of the virtual display area is not influenced.
Another embodiment of the present invention provides an electronic paper display device including an electronic paper display panel and the above-described driving device, wherein,
the display area of the electronic paper display panel comprises Pixel units (pixels) which are arranged in an array mode, the Pixel units comprise first Pixel electrodes, and in the process of refreshing a picture, the first driving module is used for applying corresponding data signals to the first Pixel electrodes contained in the display area according to Pixel data of each Pixel so as to drive the display area to display a picture corresponding to picture data. For example, if the pixel data of a pixel is white pixel data, a white driving signal is applied to the first pixel electrode of the pixel, so that after the screen refreshing is completed, the white particles in the pixel are suspended at a position close to the display surface, and the pixel displays white; if the pixel data of a pixel is black pixel data, a black driving signal is applied to a first pixel electrode of the pixel, so that after the picture refreshing is finished, black particles in the pixel are suspended at a position close to a display surface, and the pixel displays black; if the pixel data of a pixel is red pixel data, a red driving signal is applied to a first pixel electrode of the pixel, so that after the screen refreshing is finished, red particles in the pixel are suspended at a position close to a display surface, and the pixel displays red.
The virtual display area of the electronic paper display panel comprises virtual Pixel units (Dummy Pixel) arranged in an array, all the virtual Pixel units are integrally connected to form a ring-shaped virtual Pixel unit which surrounds the display area, the virtual Pixel unit can also be called a pseudo Pixel unit, a redundant Pixel unit or an invalid Pixel unit, and the virtual Pixel unit comprises a second Pixel electrode. The virtual display area of the electronic paper display device is used for displaying a solid-color picture, and is usually displayed as a white picture (black and red pictures can also be set). The second driving module is used for driving the virtual display area to display the solid-color picture.
The electronic paper display device may be any product or component with a display function, such as an electronic book, which is not limited in the embodiment of the present invention.
Another embodiment of the present invention provides a driving method for an electronic paper display panel, where the electronic paper display panel includes a display area and a virtual display area for displaying a solid-color picture, the display area includes pixel units arranged in an array, the pixel units include a first pixel electrode, and the virtual display area includes a second pixel electrode;
the driving method includes:
And in the writing stage of each picture period, a first pulse signal is sent to the first pixel electrodes arranged in an array, and a second pulse signal with a first set interval is sent to the second pixel electrodes, so that the display area displays pictures in each picture period and the virtual display area displays solid-color pictures in each picture period.
In one possible implementation, the picture period further includes a reverse phase preceding the writing phase, and the driving method further includes:
and transmitting a third pulse signal to the first pixel electrodes arranged in the array and transmitting a plurality of fourth pulse signals with a second set interval to the second pixel electrodes in the reverse stage.
In one possible implementation, the picture period further comprises an activation phase between the reverse phase and the write phase,
and transmitting fifth pulse signals with third set intervals and with alternating polarities to the first pixel electrodes arranged in the array in the activation stage, and transmitting sixth pulse signal groups with third set intervals and with alternating polarities to the second pixel electrodes in the activation stage, wherein each sixth pulse signal group comprises a plurality of sixth pulse signals with fourth set intervals and with the same polarities.
In a possible implementation, the activation phase comprises a first activation sub-phase and a second activation sub-phase subsequent to the first activation sub-phase, the fifth pulse signal comprises a first fifth pulse sub-signal and a second fifth pulse sub-signal, the sixth pulse signal group comprises a first sixth pulse signal sub-group and a second sixth pulse signal sub-group,
the transmitting the fifth pulse signal with the third set interval and the sixth pulse signal group with the third set interval and the polarity alternation to the first pixel electrode arranged in the array in the activation stage comprises the following steps:
transmitting a first fifth pulse sub-signal with alternating polarity and a fifth set interval to a first pixel electrode arranged in an array in a first activation sub-stage, and transmitting a second fifth pulse sub-signal with alternating polarity and a sixth set interval to the first pixel electrode arranged in the array in a second activation sub-stage, wherein the duration of the first fifth pulse sub-signal is smaller than that of the second fifth pulse sub-signal, and the fifth set interval is smaller than that of the sixth set interval;
and transmitting a first and a sixth pulse signal sub-groups with polarity alternation of a fifth set interval to the second pixel electrode in the first activation sub-stage, and transmitting a second and a sixth pulse signal sub-groups with polarity alternation of a sixth set interval to the second pixel electrode in the second activation sub-stage, wherein the duration of the first and the sixth pulse signal sub-groups is smaller than that of the second and the sixth pulse signal sub-groups, each of which comprises a plurality of sixth pulse signals with a fourth set interval.
In one possible implementation, the duration of the single second pulse signal is greater than the duration of the single first pulse signal;
in the presence of the fourth pulse signal, the time length of the single fourth pulse signal is longer than the time length of the single first pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is longer than the duration of the single first pulse signal.
In one possible implementation, the duration of the single second pulse signal is in the range of 2-3 times the duration of the single first pulse signal;
under the condition that the fourth pulse signal exists, the value range of the duration of the single fourth pulse signal is 2-3 times of the duration of the single first pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal has a value ranging between 2-3 times the duration of the single first pulse signal.
In one possible implementation, in the presence of the fourth pulse signal, the duration of the single fourth pulse signal is equal to the duration of the single second pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is equal to the duration of the single second pulse signal.
In one possible implementation, the writing phase includes a plurality of frame periods, wherein each frame period in the frame periods required to be driven with the second pulse signal includes a period of the second pulse signal and a period of the first set interval, respectively;
in the case where there is a reverse phase, the reverse phase includes a plurality of frame periods, each frame period in the frame periods required to be driven with a fourth pulse signal includes a period of the fourth pulse signal and a period of the second set interval, respectively;
in the case where there is an active phase, the active phase includes a plurality of frame periods, and each frame period in the frame periods required to be driven with a sixth pulse signal includes a period of the sixth pulse signal and a period of the fourth set interval, respectively.
In one possible implementation, in each frame period, a total duration of the plurality of second pulse signals and the first set interval is equal to a total duration of the first pulse signals sent to the first pixel electrode of the column when the solid-color frame is displayed in the display area.
It should be noted that, the driving method for the electronic paper display panel provided in this embodiment is similar to the principle and the workflow of the driving device for the electronic paper display panel described above, and the relevant parts may be referred to the above description and will not be repeated herein.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It is further noted that in the description of the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims (19)

1. The driving device for the electronic paper display panel is characterized in that the electronic paper display panel comprises a display area and a virtual display area for displaying a solid-color picture, the display area comprises pixel units which are arranged in an array, the pixel units comprise first pixel electrodes, and the virtual display area comprises second pixel electrodes;
the driving device includes:
the first driving module is used for respectively sending first pulse signals to the first pixel electrodes arranged in the array in the writing stage of each picture period so that the display area displays pictures;
and the second driving module is used for sending a plurality of second pulse signals with a first set interval to the second pixel electrode in the writing stage of each picture period so that the virtual display area displays a pure-color picture.
2. The drive device of claim 1, wherein the picture period further comprises a reverse phase prior to the write phase,
the first driving module is further used for sending a third pulse signal to the first pixel electrodes arranged in the array at a reverse stage;
the second driving module is further configured to send a plurality of fourth pulse signals with a second set interval to the second pixel electrode in a reverse phase.
3. The drive of claim 2, wherein the picture period further comprises an active phase between the reverse phase and the write phase,
the first driving module is further used for sending a fifth pulse signal with a third set interval and alternating polarity to the first pixel electrodes arranged in the array in an activation stage;
the second driving module is further configured to send, in an activation phase, a sixth pulse signal group with polarity alternation having a third set interval to the second pixel electrode, where each sixth pulse signal group includes a plurality of sixth pulse signals with same polarity having a fourth set interval.
4. The driving device as claimed in claim 3, wherein the activation phase comprises a first activation sub-phase and a second activation sub-phase subsequent to the first activation sub-phase, the fifth pulse signal comprises a first fifth pulse sub-signal and a second fifth pulse sub-signal, the sixth pulse signal group comprises a first sixth pulse signal sub-group and a second sixth pulse signal sub-group,
The first driving module is configured to send, in a first activation sub-stage, a first fifth pulse sub-signal with a fifth set interval and alternating polarity to a first pixel electrode arranged in an array, and send, in a second activation sub-stage, a second fifth pulse sub-signal with a sixth set interval and alternating polarity to a first pixel electrode arranged in the array, where a duration of the first fifth pulse sub-signal is less than a duration of the second fifth pulse sub-signal, and the fifth set interval is less than the sixth set interval;
the second driving module is configured to send, in a first activation sub-stage, a first sixth pulse signal subgroup with polarity alternation having a fifth set interval to the second pixel electrode, and send, in a second activation sub-stage, a second sixth pulse signal subgroup with polarity alternation having a sixth set interval to the second pixel electrode, where a duration of the first sixth pulse signal subgroup is smaller than a duration of the second sixth pulse signal subgroup, and each of the first sixth pulse signal subgroup and each of the second sixth pulse signal subgroup includes a plurality of sixth pulse signals having a fourth set interval.
5. The drive device according to any one of claims 1 to 4, wherein a duration of a single second pulse signal is longer than a duration of a single first pulse signal;
In the presence of the fourth pulse signal, the time length of the single fourth pulse signal is longer than the time length of the single first pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is longer than the duration of the single first pulse signal.
6. The driving device according to claim 5, wherein the duration of the single second pulse signal is in a range between 2-3 times the duration of the single first pulse signal;
under the condition that the fourth pulse signal exists, the value range of the duration of the single fourth pulse signal is 2-3 times of the duration of the single first pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal has a value ranging between 2-3 times the duration of the single first pulse signal.
7. The drive device according to claim 6, wherein in the presence of the fourth pulse signal, a duration of a single fourth pulse signal is equal to a duration of a single second pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is equal to the duration of the single second pulse signal.
8. The drive device according to claim 3 or 4, wherein the writing phase includes a plurality of frame periods, wherein each frame period in the frame periods required to be driven with the second pulse signal includes a period of the second pulse signal and a period of the first set interval, respectively;
In the case where there is a reverse phase, the reverse phase includes a plurality of frame periods, each frame period in the frame periods required to be driven with a fourth pulse signal includes a period of the fourth pulse signal and a period of the second set interval, respectively;
in the case where there is an active phase, the active phase includes a plurality of frame periods, and each frame period in the frame periods required to be driven with a sixth pulse signal includes a period of the sixth pulse signal and a period of the fourth set interval, respectively.
9. The driving apparatus as recited in claim 1 wherein a total duration of the plurality of second pulse signals and the first set interval in each frame period is equal to a total duration of the first pulse signals transmitted by the first driving module to a row of first pixel electrodes when the solid-color frame is displayed in the display area.
10. An electronic paper display device comprising an electronic paper display panel and the driving device according to any one of claims 1 to 9.
11. The driving method for the electronic paper display panel is characterized in that the electronic paper display panel comprises a display area and a virtual display area for displaying a solid-color picture, wherein the display area comprises pixel units which are arranged in an array, the pixel units comprise first pixel electrodes, and the virtual display area comprises second pixel electrodes;
The driving method includes:
and in the writing stage of each picture period, a first pulse signal is sent to the first pixel electrodes arranged in an array, and a second pulse signal with a first set interval is sent to the second pixel electrodes, so that the display area displays pictures in each picture period and the virtual display area displays solid-color pictures in each picture period.
12. The driving method according to claim 11, wherein the picture period further includes a reverse phase preceding the writing phase, the driving method further comprising:
and transmitting a third pulse signal to the first pixel electrodes arranged in the array and transmitting a plurality of fourth pulse signals with a second set interval to the second pixel electrodes in the reverse stage.
13. The driving method according to claim 12, wherein the picture period further includes an activation phase between the reverse phase and the writing phase,
and transmitting fifth pulse signals with third set intervals and with alternating polarities to the first pixel electrodes arranged in the array in the activation stage, and transmitting sixth pulse signal groups with third set intervals and with alternating polarities to the second pixel electrodes in the activation stage, wherein each sixth pulse signal group comprises a plurality of sixth pulse signals with fourth set intervals and with the same polarities.
14. The driving method as claimed in claim 13, wherein the active phase includes a first active sub-phase and a second active sub-phase subsequent to the first active sub-phase, the fifth pulse signal includes a first fifth pulse sub-signal and a second fifth pulse sub-signal, the sixth pulse signal group includes a first sixth pulse signal group and a second sixth pulse signal group,
the transmitting the fifth pulse signal with the third set interval and the sixth pulse signal group with the third set interval and the polarity alternation to the first pixel electrode arranged in the array in the activation stage comprises the following steps:
transmitting a first fifth pulse sub-signal with alternating polarity and a fifth set interval to a first pixel electrode arranged in an array in a first activation sub-stage, and transmitting a second fifth pulse sub-signal with alternating polarity and a sixth set interval to the first pixel electrode arranged in the array in a second activation sub-stage, wherein the duration of the first fifth pulse sub-signal is smaller than that of the second fifth pulse sub-signal, and the fifth set interval is smaller than that of the sixth set interval;
And transmitting a first and a sixth pulse signal sub-groups with polarity alternation of a fifth set interval to the second pixel electrode in the first activation sub-stage, and transmitting a second and a sixth pulse signal sub-groups with polarity alternation of a sixth set interval to the second pixel electrode in the second activation sub-stage, wherein the duration of the first and the sixth pulse signal sub-groups is smaller than that of the second and the sixth pulse signal sub-groups, each of which comprises a plurality of sixth pulse signals with a fourth set interval.
15. The driving method according to any one of claims 11 to 14, wherein a duration of the single second pulse signal is longer than a duration of the single first pulse signal;
in the presence of the fourth pulse signal, the time length of the single fourth pulse signal is longer than the time length of the single first pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is longer than the duration of the single first pulse signal.
16. The driving method according to claim 15, wherein the duration of the single second pulse signal has a value ranging between 2-3 times the duration of the single first pulse signal;
Under the condition that the fourth pulse signal exists, the value range of the duration of the single fourth pulse signal is 2-3 times of the duration of the single first pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal has a value ranging between 2-3 times the duration of the single first pulse signal.
17. The driving method according to claim 16, wherein in the presence of the fourth pulse signal, a duration of a single fourth pulse signal is equal to a duration of a single second pulse signal;
in the case where the sixth pulse signal is present, the duration of the single sixth pulse signal is equal to the duration of the single second pulse signal.
18. The driving method according to claim 13 or 14, wherein the writing phase includes a plurality of frame periods, wherein each frame period in the frame periods required to be driven with the second pulse signal includes a period of the second pulse signal and a period of the first set interval, respectively;
in the case where there is a reverse phase, the reverse phase includes a plurality of frame periods, each frame period in the frame periods required to be driven with a fourth pulse signal includes a period of the fourth pulse signal and a period of the second set interval, respectively;
In the case where there is an active phase, the active phase includes a plurality of frame periods, and each frame period in the frame periods required to be driven with a sixth pulse signal includes a period of the sixth pulse signal and a period of the fourth set interval, respectively.
19. The driving method according to claim 11, wherein a total duration of the plurality of second pulse signals and the first set interval is equal to a total duration of the first pulse signals transmitted to the one row of first pixel electrodes when the solid-color picture is displayed in the display area in each picture period.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102881266A (en) * 2011-07-15 2013-01-16 群康科技(深圳)有限公司 Electronic display device and driving method thereof
CN107767821A (en) * 2017-10-17 2018-03-06 华南师范大学 A kind of fast refreshing method, system and device for suppressing ink splitting

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1816841A (en) * 2003-07-04 2006-08-09 皇家飞利浦电子股份有限公司 Electrophoretic display panel
US7034783B2 (en) * 2003-08-19 2006-04-25 E Ink Corporation Method for controlling electro-optic display
US20060274030A1 (en) * 2003-08-22 2006-12-07 Koninklijke Philips Electronics N.V. Electrophoretic display panel
TW200511178A (en) * 2003-08-25 2005-03-16 Koninkl Philips Electronics Nv Method of compensating image instability and improving greyscale accuracy for electrophoretic displays
JP4529139B2 (en) * 2005-08-31 2010-08-25 セイコーエプソン株式会社 Method for driving electrophoresis apparatus, controller for controlling electrophoresis apparatus, electrophoresis apparatus, and electronic apparatus
JP2008070546A (en) * 2006-09-13 2008-03-27 Seiko Epson Corp Driving method of electrophoresis device and electrophoresis device
JP2011123216A (en) * 2009-12-09 2011-06-23 Seiko Epson Corp Method of driving electrophoretic display device, electrophoretic display device and electronic equipment
CN101847373A (en) * 2010-05-11 2010-09-29 中山大学 Driving method for improving display contrast of microcapsule electrophoresis display device
US20120105478A1 (en) * 2010-10-28 2012-05-03 Monotype Imaging Inc. Presenting Content on Electronic Paper Displays

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102881266A (en) * 2011-07-15 2013-01-16 群康科技(深圳)有限公司 Electronic display device and driving method thereof
CN107767821A (en) * 2017-10-17 2018-03-06 华南师范大学 A kind of fast refreshing method, system and device for suppressing ink splitting

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