CN113096608B - Electrophoresis display panel, driving method thereof and display device - Google Patents
Electrophoresis display panel, driving method thereof and display device Download PDFInfo
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- 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
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
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- G02F1/1676—Electrodes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/1685—Operation of cells; Circuit arrangements affecting the entire cell
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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
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
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Abstract
The application discloses electrophoresis display panel and driving method, display device, electrophoresis display panel includes first electrode layer, second electrode layer and the charged particle who distributes between first electrode layer and second electrode layer, first electrode layer includes the display area and surrounds the marginal zone of display area, electrophoresis display panel still includes drive arrangement, drive arrangement is connected with first electrode layer, be used for through the first charged particle between first electrode layer and the second electrode layer of first drive waveform drive display area, and through the second drive waveform drive charged particle between the first electrode layer and the second electrode layer of marginal zone. The display effect of the edge area of the electrophoresis display panel is more flexible and controllable.
Description
Technical Field
The embodiment of the application relates to but not limited to the technical field of display, and in particular relates to an electrophoretic display panel, a driving method thereof and a display device.
Background
Electronic Paper (E-Paper) is a display screen manufactured by using an electrophoretic display technology, and achieves an effect of displaying an image by continuously applying a waveform of a driving voltage to each pixel point through a driving integrated circuit. The three-color electronic paper is characterized in that black and white charged particles are packaged in the same capsule structure, and the three-color electronic paper is characterized in that black and white red, black and white yellow, black and white blue and other three-color charged particles are packaged in the same capsule structure, and the lifting movement of the charged particles with different charges is controlled by a positive electric field and a negative electric field applied from the outside so as to display black and white double-color and three-color display effects.
In the related art, when the electronic paper displays, the charged particles in the edge area and the charged particles in the display area are usually driven by using the same driving waveform, but because the display content in the edge area is usually relatively single, the driving method makes the driving waveform in the edge area tend to be complex, and the display effect is not well controlled.
Disclosure of Invention
The embodiment of the application provides an electrophoretic display panel, a driving method thereof and a display device, and the display effect of the edge area of the electrophoretic display panel can be more flexible and controllable.
In order to solve the above technical problem, an embodiment of the present application provides an electrophoretic display panel, including a first electrode layer, a second electrode layer, and charged particles distributed between the first electrode layer and the second electrode layer, where the first electrode layer includes a display region and an edge region surrounding the display region; the electrophoretic display panel further includes a driving device, connected to the first electrode layer, for driving the charged particles between the first electrode layer and the second electrode layer of the display region by a first driving waveform, and driving the charged particles between the first electrode layer and the second electrode layer of the edge region by a second driving waveform.
Optionally, the charged particles include first to nth charged particles, N is a natural number greater than or equal to 2, and the driving device includes first to nth driving circuits corresponding to the first to nth charged particles one to one, respectively, wherein: the ith driving circuit is used for driving ith charged particles between a first electrode layer and a second electrode layer of the display area, wherein i is a natural number between 1 and N; the ith driving waveform output by the ith driving circuit comprises an ith balance stage, an ith jitter stage and an ith display stage, wherein the ith balance stage applies an ith direct current voltage to the first electrode layer of the display area, the ith display stage applies an ith data voltage to the first electrode layer of the display area, the total charge number of the applied ith direct current voltage and the ith data voltage is zero, and the ith jitter stage applies an alternating current voltage to the first electrode layer of the display area.
Optionally, the data voltage applied to the first electrode layer of the display region by the first driving circuit corresponding to the first charged particles in the first display phase is-E1 v dc voltage with duration between t11 and t12, the duration of the first display phase is between t10 and t13, and t10< t11< t12< t 13.
Optionally, the driving device further comprises an (N +1) th driving circuit, the (N +1) th driving circuit being configured to drive the first charged particles between the first electrode layer and the second electrode layer of the edge region; the (N +1) th driving waveform output by the (N +1) th driving circuit comprises an (N +1) th balancing stage and an (N +1) th display stage, wherein the (N +1) th balancing stage applies an (N +1) th direct current voltage to the first electrode layer of the edge region, the (N +1) th display stage applies an (N +1) th data voltage to the first electrode layer of the edge region, and the total charge number of the applied (N +1) th direct current voltage and the (N +1) th data voltage is zero; the (N +1) th data voltage is applied as-E1 VDC voltage having a duration between t14 and t13, the duration of the (N +1) th display phase is t 10-t 13, t10< t11< t12< t14< t 13.
Optionally, the driving device further comprises an (N +2) th driving circuit, the (N +2) th driving circuit being configured to drive the first charged particles between the first electrode layer and the second electrode layer of the edge region; the (N +2) th driving waveform output by the (N +2) th driving circuit includes an (N +2) th balancing stage and an (N +2) th display stage, the (N +2) th balancing stage applies an (N +2) th direct current voltage to the first electrode layer of the edge region, the (N +2) th display stage applies an (N +2) th data voltage to the first electrode layer of the edge region, and the total charge number of the applied (N +2) th direct current voltage and the (N +2) th data voltage is zero; the (N +2) th data voltage applied includes: the voltage of-E1 with the duration between t11 and t12 and the voltage of-E2 with the duration between t12 and t13, the maintaining time of the (N +2) th display stage is t 10-t 13, and E1> E2> 0.
Optionally, the alternating voltage signal is a square wave voltage signal, and the duty ratio is 50%.
Embodiments of the present application further provide a display device, including the electrophoretic display panel as described above.
Optionally, when the driving device includes an (N +1) th driving circuit and an (N +2) th driving circuit, the display device further includes a detecting device and a processor; the detection device is used for detecting whether a display picture of the edge area is abnormal or not and sending a detection result to the processor; the processor drives the first charged particles between the first electrode layer and the second electrode layer of the edge region using an (N +1) th drive circuit or an (N +2) th drive circuit according to the detection result.
The embodiment of the present application further provides a driving method of an electrophoretic display panel, where the electrophoretic display panel includes a first electrode layer, a second electrode layer, and charged particles distributed between the first electrode layer and the second electrode layer, the first electrode layer includes a display region and an edge region surrounding the display region, and the method includes: driving the charged particles between the first electrode layer and the second electrode layer of the display region by a first drive waveform; the charged particles between the first electrode layer and the second electrode layer of the edge region are driven by a second drive waveform.
Optionally, the driving device includes an (N +1) th driving circuit and an (N +2) th driving circuit, the display device further includes a detecting device and a processor, and the driving the charged particles between the first electrode layer and the second electrode layer of the edge region by the second driving waveform includes: the detection device detects whether a display picture of the edge area is abnormal or not and sends a detection result to the processor; the processor drives the first charged particles between the first electrode layer and the second electrode layer of the edge region using an (N +1) th drive circuit or an (N +2) th drive circuit according to the detection result.
The embodiment of the application provides an electrophoresis display panel and a driving method thereof, and a display device, wherein a first driving waveform is used for driving charged particles between a first electrode layer and a second electrode layer of a display area, a second driving waveform is used for driving the charged particles between the first electrode layer and the second electrode layer of an edge area, the driving waveform of the charged particles of the edge area is independent from the driving waveform of the charged particles of the display area, the driving waveform of the charged particles of the edge area is not attached to the driving waveform of the debugged charged particles of the display area any more, so that the driving waveform of the charged particles of the edge area can be independently controlled and independently burned, and the display effect of the edge area is more flexible and controllable.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a schematic structural diagram of an electrophoretic display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an electrophoretic display panel according to an embodiment of the present application;
fig. 3 is a schematic diagram of driving waveforms of driving circuits according to a first embodiment of the present application;
fig. 4 is a schematic structural diagram of a display device according to a second embodiment of the present application;
fig. 5 is a flowchart illustrating a driving method of an electrophoretic display panel according to a third embodiment of the present application.
Description of the reference numerals:
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Unless otherwise defined, technical or scientific terms used throughout the disclosure of the embodiments of the present application shall have the ordinary meaning as understood by those having ordinary skill in the art to which the present application belongs. The use of "first," "second," and similar terms in the embodiments of the present application is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that a particular element or item appears in front of the word or is detected by mistake, and that the word or item appears after the word or item and its equivalents, but does not exclude other elements or misdetections.
The embodiment of the application provides an electrophoretic display panel, a driving method thereof and a display device, so as to overcome the defects that the driving waveform of the edge area of the conventional electrophoretic display panel tends to be complex, the display effect is not easy to control and the like.
Example one
Fig. 1 is a schematic structural diagram of an electrophoretic display panel according to a first embodiment of the present disclosure, and as shown in fig. 1, the electrophoretic display panel provided in this embodiment includes: a first electrode layer 10, a second electrode layer 20 and charged particles 30 distributed between the first electrode layer 10 and the second electrode layer 20, the first electrode layer 10 comprising a display area 11 and an edge area 12 surrounding the display area 11.
The electrophoretic display panel further comprises a driving means 40, the driving means 40 being connected to the first electrode layer 10 for driving the charged particles 30 between the first electrode layer 10 and the second electrode layer 20 of the display area 11 by a first driving waveform and driving the charged particles 30 between the first electrode layer 10 and the second electrode layer 20 of the edge area 12 by a second driving waveform.
When the electrophoretic display panel in the related art debugs the driving waveforms, the display effect of the display area and the edge area need to be considered, so that the overall difficulty in debugging the driving waveforms is high, and the image quality improvement effect is very limited. This application is independent from the drive waveform of the charged particle of display area through the drive waveform with the charged particle of fringe field, and the drive waveform of the charged particle of fringe field no longer depends on the drive waveform of the charged particle of display area that has debugged, can carry out independent control to the drive waveform of the charged particle of fringe field, and independent burning record, and then eliminate the not good scheduling problem of picture quality of fringe field for the display effect of fringe field is nimble controllable more.
In this embodiment, the first electrode layer 10 may be a pixel electrode layer, the second electrode layer 20 may be a common electrode layer having a voltage of 0V, and the common electrode layer 20 may be a transparent electrode for display. By applying different voltages to different positions of the first electrode layer 10, the electrophoretic display panel can display patterns or characters on the whole.
In the present embodiment, the charged particles 30 may have a microcapsule structure or a microcup structure. Taking the microcapsule structure as an example, the microcapsule is wrapped with transparent electrophoretic fluid and charged particles of different colors, and the driving voltages of the charged particles of different colors are different. The charged particles move in the microcapsules to perform display by driving a driving voltage applied between the first electrode layer 10 and the second electrode layer 20.
In this embodiment, the charged particles 30 include first to nth charged particles, N is a natural number greater than or equal to 2, and the driving device 40 includes first to nth driving circuits corresponding to the first to nth charged particles one to one, respectively, wherein: the ith driving circuit is used for driving ith charged particles between a first electrode layer and a second electrode layer of the display area, wherein i is a natural number between 1 and N; the ith driving waveform output by the ith driving circuit comprises an ith balance stage, an ith jitter stage and an ith display stage, wherein the ith balance stage applies an ith direct current voltage to the first electrode layer of the display area, the ith display stage applies an ith data voltage to the first electrode layer of the display area, the total charge number of the applied ith direct current voltage and the ith data voltage is zero, and the ith jitter stage applies an alternating current voltage to the first electrode layer of the display area.
Generally, if the time for applying a positive voltage to the charged particles cannot be equal to the time for applying a negative voltage, the charged particles are subjected to more force in one direction. If such a situation continues for a long time, the charged particles may be damaged, affecting the display effect. In this embodiment, the ith dc voltage is applied to the first electrode layer of the display region in the ith balance stage, and the total charge number between the applied ith dc voltage and the ith data voltage is zero (since the total charge number of the positive and negative voltages is always zero in the ith dither stage, it is not necessary to consider balancing this stage), which can be avoided.
The present embodiment applies an alternating voltage signal of varying amplitude to the first electrode layer of the display region in the ith dithering stage to cause the charged particles to oscillate, i.e., to produce a small amplitude back and forth motion, near their respective locations. This can improve the motion activity of the charged particles. After the electrophoretic display panel displays static content for a long time, the charged particles are in the same position for a long time. At this time, the charged particles may be hindered by the surrounding environment (e.g., liquid surrounding the charged particles) and may not be able to move sensitively in response to the data voltage. Such a hindrance can be overcome well after the charged particles are oscillated.
In this embodiment, the alternating voltage signal applied to the first electrode layer of the display area in the ith dithering stage may be a square wave voltage signal, and the duty ratio is 50%.
In this embodiment, the frequency of the alternating voltage signal applied to the first electrode layer of the display region in the ith dithering stage may be 24Hz or higher, so that the human eye cannot perceive the change of the image. This can prevent the occurrence of a flicker phenomenon when switching display contents. Further, the frequency may be equal to or greater than 30Hz to obtain a better flicker prevention effect.
In this embodiment, the duration of the alternating voltage signal applied to the first electrode layer of the display region in the ith dithering stage may be less than or equal to the duration of the ith display stage, so as to reduce power consumption and shorten driving time.
In this embodiment, the number of cycles of the alternating voltage signal applied to the first electrode layer of the display region in the ith dithering stage may be arbitrarily set. Generally, the greater the number of cycles, the better the effect of the oscillation. In the case of 4 cycles shown in fig. 3, 2 or a little more cycles can give a good oscillation effect and low power consumption can be maintained.
In the present embodiment, by setting the ith display stage after the ith dithering stage and applying the ith data voltage signal to the pixel electrode layer, the charged particles can correctly respond to the ith data voltage signal and display new content. Since the motion activity of the charged particles is increased in the ith dithering stage, the possible obstruction of the charged particles can be reduced, and the situation that the charged particles cannot move to a predetermined display position is avoided. The problem of inaccurate display content is thus avoided.
In this embodiment, N may be 2 or 3. For example, when N is 2, the charged particles may include black charged particles and white charged particles. For example, when N is 3, the charged particles may include black charged particles, white charged particles, and red charged particles, or may include black charged particles, white charged particles, and yellow charged particles, or the like. In the following description, N is 3, and the charged particles include charged particles of three colors of black and white and red, but it should be noted that the embodiments of the present invention are also applicable to cases where N is another numerical value and the color of the charged particles is another color.
In this embodiment, it is assumed that the first charged particles 31 are white charged particles, the second charged particles 32 are black charged particles, the third charged particles 33 are red charged particles, the driving circuit corresponding to the white charged particles is a first driving circuit, the driving circuit corresponding to the black charged particles is a second driving circuit, and the driving circuit corresponding to the red charged particles is a third driving circuit. The first to third driving waveforms output from the first to third driving circuits are shown in fig. 3.
The first data voltage applied to the first electrode layer of the display region by the first driving circuit in the first display phase is a direct current voltage with a magnitude of-E1V and a duration between t11 and t12, the duration of the first display phase is between t10 and t13, and t10< t11< t12< t 13.
The second data voltage applied to the first electrode layer of the display region by the second driving circuit in the second display phase is a direct current voltage with a magnitude of + E2V and a duration between t21 and t22, the duration of the second display phase is between t20 and t23, and t20< t21< t22< t 23.
The third data voltage applied to the first electrode layer of the display region by the third driving circuit in the third display stage includes: (1) a dc voltage of magnitude-E31 volts for a duration between t31 and t32, (2) a dc voltage of magnitude + E32 volts for a duration between t32 and t33, (1) a dc voltage of magnitude-E33 volts for a duration between t34 and t35, (2) a dc voltage of magnitude + E34 volts for a duration between t35 and t36, and a duration between t30 and t36 for the third display phase, t30< t31< t32< t33< t34< t35< t 36.
Alternatively, E1 ═ E2 ═ E31 ═ E33 ═ 15V, 4V < E32 ═ E34< 10V.
Since the first driving circuit applies-E1 v dc voltage with duration time between t11 and t12 to the first electrode layer of the display region in the first display stage, there is a period of inactivity from t12 to t13, at this time, the pixel electrode layer of the edge region is easily affected by the data voltage of other regions, an induced voltage is generated, a voltage difference is formed between the induced voltage and the voltage of the common electrode layer, and the red charged particles are relatively active, so that the electrophoretic display panel in the related art is easily subjected to the problem of red edge display image in this stage, which seriously affects the image display effect of the electronic paper and reduces the user experience.
In this embodiment, the driving apparatus further includes an (N +1) th driving circuit, and the (N +1) th driving circuit is configured to drive the first charged particles between the first electrode layer and the second electrode layer of the edge region.
The (N +1) th driving waveform output by the (N +1) th driving circuit comprises an (N +1) th balance stage and an (N +1) th display stage, wherein the (N +1) th balance stage applies an (N +1) th direct current voltage to the first electrode layer of the edge region, the (N +1) th display stage applies an (N +1) th data voltage to the first electrode layer of the edge region, and the total charge number of the applied (N +1) th direct current voltage and the applied (N +1) th data voltage is zero; the (N +1) th data voltage is applied as-E1 VDC voltage having a duration between t14 and t13, the duration of the (N +1) th display phase is t 10-t 13, t10< t11< t12< t14< t 13.
The (N +1) th driving waveform output by the (N +1) th driving circuit in the embodiment omits a shaking stage, so that the driving waveform of an edge area is simplified, the power consumption of equipment is saved, and the (N +1) th data voltage is applied at the end of a display stage, so that the problem that the edge of a display image of an electrophoresis display panel in the related art is easily reddened at the stage is solved, the image display effect of the electronic paper is improved, and the use experience of a user is improved.
In the present embodiment, the time difference between t14 and t13 is equal to the time of the minimum number of frames driven by a black picture as a white picture.
In this embodiment, the driving apparatus further includes an (N +2) th driving circuit, and the (N +2) th driving circuit is configured to drive the first charged particles between the first electrode layer and the second electrode layer of the edge region.
The (N +2) th driving waveform output by the (N +2) th driving circuit comprises an (N +2) th balancing stage and an (N +2) th display stage, wherein the (N +2) th balancing stage applies an (N +2) th direct-current voltage to the first electrode layer of the edge region, the (N +2) th display stage applies an (N +2) th data voltage to the first electrode layer of the edge region, and the total charge number of the applied (N +2) th direct-current voltage and the (N +2) th data voltage is zero; the (N +2) th data voltage applied includes: the voltage of-E1 with the duration between t11 and t12 and the voltage of-E4 with the duration between t12 and t13, and the maintaining time of the (N +2) th display phase is t10 to t13, and E1> E4> 0.
In the embodiment, the (N +2) th driving waveform output by the (N +2) th driving circuit omits a shaking stage, so that the power consumption of the device is saved, and after the driving waveform of the white charged particles is output in the display stage, a lower voltage is maintained until the display stage is finished, so that the problem that the edge of a display image of an electrophoretic display panel in the related art is easily reddened in the stage is solved, the image display effect of the electronic paper is improved, and the use experience of a user is improved.
In this embodiment, the (N +1) th driving waveform is simpler than the (N +2) th driving waveform, the power consumption of the device is lower, the (N +2) th driving waveform is more general, and the effect of processing the abnormal condition of the edge is better. Since the red charged particles are less active at normal or low temperatures and more active at high temperatures, it is conceivable that the (N +1) th driving circuit is used to drive the first charged particles between the first electrode layer and the second electrode layer in the edge region at normal or low temperatures and the (N +2) th driving circuit is used to drive the first charged particles between the first electrode layer and the second electrode layer in the edge region at high temperatures.
Example two
Based on the inventive concept of the foregoing embodiment, an embodiment of the present application further provides a display device, including the electrophoretic display panel described in the first embodiment.
The display device of the embodiment of the application can be as follows: handheld devices such as e-readers, tablets, etc. are powered by batteries. Because the display device of the embodiment uses different driving waveforms to drive the charged particles between the first electrode layer and the second electrode layer in the display area and the charged particles between the first electrode layer and the second electrode layer in the edge area, the display effect of the edge area of the display panel is more flexible and controllable.
In this embodiment, the charged particles may include first to nth charged particles, N is a natural number greater than or equal to 2, and the driving device includes first to nth driving circuits corresponding to the first to nth charged particles one to one, respectively, wherein: the ith driving circuit is used for driving ith charged particles between a first electrode layer and a second electrode layer of the display area, and i is a natural number between 1 and N.
The ith driving waveform output by the ith driving circuit comprises an ith balance stage, an ith jitter stage and an ith display stage, wherein the ith balance stage applies an ith direct current voltage to the first electrode layer of the display area, the ith display stage applies an ith data voltage to the first electrode layer of the display area, the total charge number of the applied ith direct current voltage and the ith data voltage is zero, and the ith jitter stage applies an alternating current voltage to the first electrode layer of the display area.
In this embodiment, the data voltage applied to the first electrode layer of the display region by the first driving circuit corresponding to the first charged particles in the first display phase is-E1 v dc voltage with duration between t11 and t12, the duration of the first display phase is between t10 and t13, and t10< t11< t12< t 13.
In this embodiment, the driving apparatus may further include an (N +1) th driving circuit for driving the first charged particles between the first electrode layer and the second electrode layer of the edge region; the (N +1) th driving waveform output by the (N +1) th driving circuit comprises an (N +1) th balance stage and an (N +1) th display stage, wherein the (N +1) th balance stage applies an (N +1) th direct current voltage to the first electrode layer of the edge region, the (N +1) th display stage applies an (N +1) th data voltage to the first electrode layer of the edge region, and the total charge number of the applied (N +1) th direct current voltage and the applied (N +1) th data voltage is zero; the (N +1) -th data voltage is applied as-E1 VDC voltage having a duration between t14 and t13, the duration of the (N +1) -th display phase is t 10-t 13, t10< t11< t12< t14< t 13.
In this embodiment, the driving apparatus may further include an (N +2) th driving circuit for driving the first charged particles between the first electrode layer and the second electrode layer of the edge region; the (N +2) th driving waveform output by the (N +2) th driving circuit includes an (N +2) th balancing stage and an (N +2) th display stage, the (N +2) th balancing stage applies an (N +2) th direct current voltage to the first electrode layer of the edge region, the (N +2) th display stage applies an (N +2) th data voltage to the first electrode layer of the edge region, and the total charge number of the applied (N +2) th direct current voltage and the (N +2) th data voltage is zero; the (N +2) th data voltage applied includes: the voltage of-E1 with the duration between t11 and t12 and the voltage of-E2 with the duration between t12 and t13, the maintaining time of the (N +2) th display stage is t 10-t 13, and E1> E2> 0.
In this embodiment, the (N +1) th driving waveform is simpler than the (N +2) th driving waveform, the power consumption of the device is lower, the (N +2) th driving waveform is more general, and the effect of processing the abnormal conditions of the edges is better. Since the red charged particles are less active at normal or low temperatures and more active at high temperatures, it is conceivable that the (N +1) th driving circuit is used to drive the first charged particles between the first electrode layer and the second electrode layer in the edge region at normal or low temperatures and the (N +2) th driving circuit is used to drive the first charged particles between the first electrode layer and the second electrode layer in the edge region at high temperatures.
In this embodiment, as shown in fig. 4, the display device may further include a detection device 50 and a processor 60, where the detection device 50 is configured to detect whether a display screen of the edge area is abnormal, and send a detection result to the processor 60; the processor 60 drives the first charged particles between the first electrode layer and the second electrode layer of the edge region using the (N +1) th drive circuit or the (N +2) th drive circuit according to the detection result.
In this embodiment, whether the display screen of the edge region is abnormal is detected by the detection device 50, and if the display screen of the edge region is detected to be abnormal (for example, the phenomenon of edge blushing occurs), the (N +2) th driving circuit is used to drive the first charged particles between the first electrode layer and the second electrode layer of the edge region; and if the display picture of the edge area is detected to have no abnormity, driving the first charged particles between the first electrode layer and the second electrode layer of the edge area by using an (N +1) th driving circuit.
In this embodiment, the detecting device 50 may be an optical detecting instrument or any other type of detecting instrument for detecting the panel defect based on the optical principle, which is not limited in this application.
In this embodiment, the first driver circuit, the second driver circuit, the third driver circuit, the (N +1) th driver circuit, and the (N +2) th driver circuit may use any special or general circuit configuration, and may include software, hardware, or a combination thereof.
In this embodiment, the driving apparatus may include a data memory in which driving waveform data corresponding to the first driving circuit, the second driving circuit, the third driving circuit, the (N +1) th driving circuit, and the (N +2) th driving circuit is stored. These data can be transmitted to the same voltage generation circuit to generate and apply different drive waveforms to the first electrode layer 10.
EXAMPLE III
Fig. 5 is a schematic flowchart of a driving method of an electrophoretic display panel according to the present application, where the electrophoretic display panel includes a first electrode layer, a second electrode layer, and charged particles distributed between the first electrode layer and the second electrode layer, the first electrode layer includes a display region and an edge region surrounding the display region, as shown in fig. 5, the driving method includes:
step S1: the charged particles between the first electrode layer and the second electrode layer of the display area are driven by a first drive waveform.
Step S2: the charged particles between the first electrode layer and the second electrode layer of the edge region are driven by a second drive waveform.
In this embodiment, the driving device includes an (N +1) th driving circuit and an (N +2) th driving circuit, the display device further includes a detecting device and a processor, and drives the charged particles between the first electrode layer and the second electrode layer of the edge region by a second driving waveform, including:
the detection device detects whether the display picture of the edge area is abnormal or not and sends the detection result to the processor.
The processor drives the first charged particles between the first electrode layer and the second electrode layer of the edge region using an (N +1) th drive circuit or an (N +2) th drive circuit according to the detection result.
In this embodiment, the (N +1) th driving waveform output by the (N +1) th driving circuit and the (N +2) th driving waveform output by the (N +2) th driving circuit can refer to the first embodiment, and are not described herein again.
In the description of the embodiments of the present application, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present application.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the purpose of facilitating understanding of the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (10)
1. An electrophoretic display panel, comprising a first electrode layer, a second electrode layer, and charged particles distributed between the first electrode layer and the second electrode layer, wherein the first electrode layer comprises a display area and an edge area surrounding the display area;
the electrophoretic display panel further comprises a driving device, wherein the driving device is connected with the first electrode layer and is used for driving the charged particles between the first electrode layer and the second electrode layer of the display area through a first driving waveform and driving the charged particles between the first electrode layer and the second electrode layer of the edge area through a second driving waveform, the first driving waveform comprises a balance stage, a shaking stage and a display stage, and the second driving waveform comprises a balance stage and a display stage.
2. The electrophoretic display panel of claim 1, wherein the charged particles include first to nth charged particles, N is a natural number greater than or equal to 2, the driving device includes first to nth driving circuits corresponding to the first to nth charged particles one by one, respectively, wherein:
the ith driving circuit is used for driving ith charged particles between a first electrode layer and a second electrode layer of the display area, wherein i is a natural number between 1 and N;
the ith driving waveform output by the ith driving circuit comprises an ith balance stage, an ith jitter stage and an ith display stage, wherein the ith balance stage applies an ith direct current voltage to the first electrode layer of the display area, the ith display stage applies an ith data voltage to the first electrode layer of the display area, the total charge number of the applied ith direct current voltage and the ith data voltage is zero, and the ith jitter stage applies an alternating current voltage to the first electrode layer of the display area.
3. The electrophoretic display panel according to claim 2 wherein the data voltage applied to the first electrode layer of the display region by the first driving circuit corresponding to the first charged particles in the first display phase is-E1 v dc voltage with duration between t11 and t12, the duration of the first display phase is between t10 and t13, and t10< t11< t12< t 13.
4. The electrophoretic display panel according to claim 3, wherein the driving means further comprises an (N +1) th driving circuit for driving the first charged particles between the first electrode layer and the second electrode layer of the edge region;
the (N +1) th driving waveform output by the (N +1) th driving circuit comprises an (N +1) th balance stage and an (N +1) th display stage, wherein the (N +1) th balance stage applies an (N +1) th direct current voltage to the first electrode layer of the edge region, the (N +1) th display stage applies an (N +1) th data voltage to the first electrode layer of the edge region, and the total charge number of the applied (N +1) th direct current voltage and the (N +1) th data voltage is zero;
the (N +1) th data voltage is applied as-E1 VDC voltage having a duration between t14 and t13, the duration of the (N +1) th display phase is t 10-t 13, t10< t11< t12< t14< t 13.
5. Electrophoretic display panel according to claim 3 or 4, wherein the driving means further comprise an (N +2) th driving circuit for driving the first charged particles between the first electrode layer and the second electrode layer of the edge region;
the (N +2) th driving waveform output by the (N +2) th driving circuit includes an (N +2) th balancing stage and an (N +2) th display stage, the (N +2) th balancing stage applies an (N +2) th direct current voltage to the first electrode layer of the edge region, the (N +2) th display stage applies an (N +2) th data voltage to the first electrode layer of the edge region, and the total charge number of the applied (N +2) th direct current voltage and the (N +2) th data voltage is zero;
the (N +2) th data voltage applied includes: the voltage of-E1 with the duration between t11 and t12 and the voltage of-E2 with the duration between t12 and t13, and the maintaining time of the (N +2) th display phase is t10 to t13, and E1> E2> 0.
6. The electrophoretic display panel of claim 2, wherein the ac voltage signal is a square wave voltage signal and the duty cycle is 50%.
7. A display device comprising an electrophoretic display panel as claimed in any one of claims 1 to 6.
8. The display device according to claim 7, wherein when the driving means comprises an (N +1) th driving circuit and an (N +2) th driving circuit, the display device further comprises detecting means and a processor;
the detection device is used for detecting whether a display picture of the edge area is abnormal or not and sending a detection result to the processor;
the processor drives the first charged particles between the first electrode layer and the second electrode layer of the edge region using an (N +1) th drive circuit or an (N +2) th drive circuit according to the detection result.
9. A method for driving an electrophoretic display panel, the electrophoretic display panel comprising a first electrode layer, a second electrode layer, and charged particles distributed between the first electrode layer and the second electrode layer, the first electrode layer comprising a display region and an edge region surrounding the display region, the electrophoretic display panel further comprising a driving device connected to the first electrode layer, the method comprising:
the driving device drives the charged particles between the first electrode layer and the second electrode layer of the display area through a first driving waveform, and the first driving waveform comprises a balance stage, a jitter stage and a display stage;
the driving device drives the charged particles between the first electrode layer and the second electrode layer of the edge region by a second driving waveform, which comprises a balancing phase and a display phase.
10. The method of driving an electrophoretic display panel according to claim 9, wherein the driving means comprises an (N +1) th driving circuit and an (N +2) th driving circuit, the display device further comprising a detecting means and a processor, and the driving the charged particles between the first electrode layer and the second electrode layer of the edge region by the second driving waveform comprises:
the detection device detects whether a display picture of the edge area is abnormal or not and sends a detection result to the processor;
the processor drives the first charged particles between the first electrode layer and the second electrode layer of the edge region using an (N +1) th drive circuit or an (N +2) th drive circuit according to the detection result.
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