CN112017599B - Electrophoretic display and driving method thereof - Google Patents
Electrophoretic display and driving method thereof Download PDFInfo
- Publication number
- CN112017599B CN112017599B CN201910462404.5A CN201910462404A CN112017599B CN 112017599 B CN112017599 B CN 112017599B CN 201910462404 A CN201910462404 A CN 201910462404A CN 112017599 B CN112017599 B CN 112017599B
- Authority
- CN
- China
- Prior art keywords
- signal
- voltage pulse
- sub
- electrophoretic
- negative voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 120
- 239000000758 substrate Substances 0.000 claims abstract description 38
- 238000001962 electrophoresis Methods 0.000 claims abstract description 11
- 239000003086 colorant Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 description 36
- 238000010586 diagram Methods 0.000 description 13
- 238000002156 mixing Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 2
- 239000003094 microcapsule Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
本发明提出一种电泳显示器及其驱动方法。电泳显示器包括显示面板以及驱动电路。显示面板包括电泳单元以及驱动基板。电泳单元包括多个电泳粒子。驱动基板配置在电泳单元下方。驱动电路耦接驱动基板。驱动电路用以在重置期间中依序提供第一重置信号以及第二重置信号至驱动基板，以重置所述多个电泳粒子。第一重置信号依序包括第一子平衡信号以及第一子混合信号。第二重置信号依序包括第二子平衡信号以及第二子混合信号。本发明的电泳显示器及其驱动方法可有效重置在电泳单元中的多个电泳粒子。
The present invention provides an electrophoretic display and a driving method thereof. An electrophoretic display includes a display panel and a driving circuit. The display panel includes an electrophoresis unit and a driving substrate. The electrophoretic unit includes a plurality of electrophoretic particles. The driving substrate is arranged below the electrophoresis unit. The driving circuit is coupled to the driving substrate. The driving circuit is used for sequentially providing the first reset signal and the second reset signal to the driving substrate during the reset period to reset the plurality of electrophoretic particles. The first reset signal includes a first sub-balanced signal and a first sub-mixed signal in sequence. The second reset signal sequentially includes a second sub-balanced signal and a second sub-mixed signal. The electrophoretic display and the driving method thereof of the present invention can effectively reset a plurality of electrophoretic particles in an electrophoretic unit.
Description
Technical Field
The present invention relates to display technologies, and in particular, to an electrophoretic display and a driving method thereof.
Background
With the advancement of electronic technology, electrophoretic displays are widely used in various display applications and electronic devices, and current electrophoretic displays have been developed to provide color display effects. However, after the electrophoretic display is driven by the conventional driving method of the electrophoretic display, if the electrophoretic display is left standing for a period of time in a non-horizontal state, due to the bi-stability effect of the electrophoretic particles, the electrophoretic particles will be in an unstable state, and the display image of the electrophoretic display will appear dark and mixed with other different colors. For example, a white picture is reddish. Therefore, in view of the above, how to make the electrophoretic display maintain good display effect even after standing for a period of time in a non-horizontal state, several embodiments of solutions will be proposed below.
Disclosure of Invention
The invention provides an electrophoretic display and a driving method thereof, which can effectively reset a plurality of electrophoretic particles in an electrophoretic cell.
The electrophoretic display comprises a display panel and a driving circuit. The display panel comprises an electrophoresis unit and a driving substrate. The electrophoretic cell includes a plurality of electrophoretic particles. The driving substrate is disposed under the electrophoresis cell. The driving circuit is coupled to the driving substrate. The driving circuit is used for sequentially providing a first reset signal and a second reset signal to the driving substrate in the reset period so as to reset the plurality of electrophoretic particles. The first reset signal sequentially includes a first sub-balanced signal and a first sub-mixed signal. The second reset signal sequentially includes a second sub-balanced signal and a second sub-mixed signal.
The driving method of the electrophoretic display comprises the following steps: providing a first reset signal to the driving substrate through the driving circuit in a reset period to reset the plurality of electrophoretic particles in the electrophoretic cell by a first sub-balance signal and a first sub-mix signal sequentially arranged in the first reset signal; and providing a second reset signal to the driving substrate through the driving circuit in the reset period to reset the plurality of electrophoretic particles in the electrophoretic cell by sequentially configuring a second sub-balance signal and a second sub-mix signal in the second reset signal.
Based on the above, the electrophoretic display and the driving method thereof of the present invention can effectively reset the distribution positions of the plurality of electrophoretic particles in the electrophoretic cell by resetting the plurality of electrophoretic particles in the electrophoretic cell in two stages, so that the reset electrophoretic display can provide good display quality even after standing for a period of time in a non-horizontal state.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a block diagram of an electrophoretic display according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a display panel according to an embodiment of the invention.
Fig. 3 is a waveform diagram of signals for driving white electrophoretic particles according to an embodiment of the invention.
FIG. 4 is a waveform diagram of signals for driving color electrophoretic particles according to an embodiment of the invention.
Fig. 5 is a waveform diagram of signals for driving black electrophoretic particles according to an embodiment of the invention.
FIG. 6 is a diagram illustrating an effect of the display panel displaying a white frame after being reset according to an embodiment of the invention.
Fig. 7 is a flow chart of a driving method according to an embodiment of the invention.
[ notation ] to show
100: an electrophoretic display;
110: a display panel;
111: an upper electrode layer;
112: an electrophoresis unit;
112A: white electrophoretic particles;
112B: colored electrophoretic particles;
112C: black electrophoretic particles;
113: a drive substrate;
120: a drive circuit;
s1: a display side;
t11, T11 ', T11 ", T21, T21', T21": during the balance period;
t12, T12 ', T12 ", T22, T22', T22": during the mixing period;
t3, T3', T3 ": a driving period;
311. 511, 341, 342, 441, 442, 541, 542: a positive voltage pulse;
321 to 323, 421 to 423, 521 to 525, 351, 352, 451, 452, 551, 552: negative voltage pulses;
331. 332, 431, 432, 531-533: a ground voltage pulse;
A1-A6, B1-B6: a sample;
s710 to S730: and (5) carrying out the following steps.
Detailed Description
In order that the present disclosure may be more readily understood, the following specific examples are given as illustrative of the invention which may be practiced in various ways. Further, wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.
Fig. 1 is a block diagram of an electrophoretic display according to an embodiment of the present invention. Referring to fig. 1, an electrophoretic display 100 includes a display panel 110 and a driving circuit 120. In the present embodiment, the electrophoretic display 100 is a color electrophoretic display device, and has a display effect of displaying at least three colors. The display panel 110 includes a plurality of pixels, and the pixels respectively correspond to a plurality of electrophoretic cells arranged in an array, wherein the electrophoretic cells include electrophoretic particles of three colors. In the present embodiment, the driving circuit 120 is configured to provide a first reset signal, a second reset signal and a display driving signal to the display panel 110 to drive the plurality of electrophoretic particles in the electrophoretic cells.
In the present embodiment, the driving circuit 120 drives the electrophoretic particles to move in the electrophoretic cells by applying a voltage, so that each pixel of the display panel 110 can display black, white, gray scale or a specific color. The display panel 110 is, for example, a Microcapsule electrophoresis (Microcapsule) panel or a MicroCup electrophoresis (MicroCup) panel. In the present embodiment, the electrophoretic cells of the display panel 110 are, for example, Microcup structures (microcups), and the electrophoretic cells may respectively include a plurality of white electrophoretic particles, a plurality of color electrophoretic particles, and a plurality of black electrophoretic particles. It is noted that, in the embodiments of the present invention, the electrophoretic color particles may be, for example, electrophoretic red particles or electrophoretic yellow particles, but the present invention is not limited thereto.
Fig. 2 is a schematic diagram of a display panel according to an embodiment of the invention. Referring to fig. 1 and 2, fig. 2 is a schematic diagram of a plurality of electrophoretic cells of the display panel 110. In the present embodiment, a single pixel of the display panel 110 includes an upper electrode layer 111, a plurality of electrophoretic cells 112, and a driving substrate 113. The electrophoretic cell 112 is disposed between the upper electrode layer 111 and the driving substrate 113, and the display side S1 of the electrophoretic cell 112 is close to the upper electrode layer 111. In the present embodiment, the upper electrode layer 111 is, for example, a transparent electrode layer. The electrophoretic cells 112 respectively include a plurality of white electrophoretic particles 112A, a plurality of colored electrophoretic particles 112B, and a plurality of black electrophoretic particles 112C. The number of electrophoretic cells 112, and the number of electrophoretic particles of the electrophoretic cells 112 are not limited to those shown in fig. 2. In the present embodiment, the driving substrate 113 includes, for example, a driving transistor, and the driving transistor is configured to receive a driving signal so that the white electrophoretic particles 112A, the color electrophoretic particles 112B, and the black electrophoretic particles 112C of the driving electrophoretic cell 112 can move in the electrophoretic cell 112.
In the present embodiment, the white electrophoretic particles 112A may be, for example, negatively charged electrophoretic particles. The colored electrophoretic particles 112B may be, for example, red electrophoretic particles or yellow electrophoretic particles having a positive charge. The black electrophoretic particles 112C may be, for example, positively charged electrophoretic particles. However, the present invention is not limited to the types of charges carried by the white electrophoretic particles 112A, the color electrophoretic particles 112B, and the black electrophoretic particles 112C.
In the present embodiment, if the electrophoretic cell 112 is to display white, black or a specific color (red or yellow), the driving circuit 120 sequentially provides a first reset signal and a second reset signal to the driving substrate 113 during the reset period to reset the white electrophoretic particles 112A, the color electrophoretic particles 112B and the black electrophoretic particles 112C in the electrophoretic cell 112. Then, the driving circuit 120 provides a display driving signal to the driving substrate 113 during the display driving period to drive at least one of the white electrophoretic particles 112A, the color electrophoretic particles 112B and the black electrophoretic particles 112C in the electrophoretic cell 112, so that the display panel 110 displays a color corresponding to the driven electrophoretic particles.
In this embodiment, the first reset signal may sequentially include a first sub-balance signal and a first sub-mix signal, and the second reset signal may sequentially include a second sub-balance signal and a second sub-mix signal. In other words, the driving circuit 120 of the present embodiment alternately drives at least one of the white electrophoretic particles 112A, the color electrophoretic particles 112B, and the black electrophoretic particles 112C in the electrophoretic cell 112 by two different sub-balance signals and two different sub-mix signals, so that at least one of the white electrophoretic particles 112A, the color electrophoretic particles 112B, and the black electrophoretic particles 112C can be effectively reset and distributed in the electrophoretic cell 112 in an evenly distributed or specially distributed manner. Therefore, the electrophoretic display 100 of the present embodiment can maintain a good display effect even after being left standing for a period of time in a non-horizontal state.
Various signal waveforms for driving the white electrophoretic particles 112A, the color electrophoretic particles 112B, and the black electrophoretic particles 112C will be described with reference to fig. 3 to 5, respectively.
Fig. 3 is a waveform diagram of signals for driving white electrophoretic particles according to an embodiment of the invention. Referring to fig. 1 to 3, for the white electrophoretic particles, the driving circuit 120 may provide a first reset signal (corresponding to the signal waveforms of the balance period T11 and the mixing period T12) and a second reset signal (corresponding to the signal waveforms of the balance period T21 and the mixing period T22) having the signal waveforms shown in fig. 3 to the driving substrate 113 to reset the white electrophoretic particles 112A in the electrophoretic cell 112. Also, in the present embodiment, the driving circuit 120 may provide a driving signal (corresponding to the signal waveform of the display driving period T3) having a signal waveform as shown in fig. 3 to the driving substrate 113 to drive the white electrophoretic particles 112A in the electrophoretic cell 112.
In the present embodiment, the first reset signal sequentially includes a first sub-balance signal (corresponding to the signal waveform of the balance period T11) and a first sub-mix signal (corresponding to the signal waveform of the mix period T12). The first sub-balance signal includes a negative voltage pulse 321, a positive voltage pulse 311, a negative voltage pulse 322, and a ground voltage pulse 331 arranged in sequence. For example, the negative voltage pulse 321 has a voltage amplitude of-15 volts (V) and a pulse width (time duration) of 200 milliseconds (ms). The positive voltage pulse 311 has a voltage amplitude of +15 volts and a pulse width of 1240 milliseconds. The negative voltage pulse 322 has a voltage amplitude of-15 volts and a pulse width of 280 milliseconds. The ground voltage pulse 331 has a voltage amplitude of 0 volts and a pulse width of 300 milliseconds. The first sub-mix comprises a plurality of positive voltage pulses 341 and a plurality of negative voltage pulses 351 arranged in a staggered manner. For example, the positive voltage pulse 341 has a voltage amplitude of +15 volts and a pulse width of 70 milliseconds. The negative voltage pulse 351 has a voltage amplitude of-15 volts and a pulse width of 70 milliseconds. The number of the positive voltage pulses 341 and the number of the negative voltage pulses 351 may be 40, for example.
In the present embodiment, the second reset signal includes a second sub-balanced signal (corresponding to the signal waveform of the balanced period T21) and a second sub-mixed signal (corresponding to the signal waveform of the mixed period T22). The second sub-balance signal includes a ground voltage pulse 332 and a negative voltage pulse 323 arranged in sequence. For example, the ground voltage pulse 332 has a voltage amplitude of 0V and a pulse width of 520 ms. The negative voltage pulse 323 has a voltage amplitude of-15 volts and a pulse width of 100 milliseconds. The second sub-mix comprises a plurality of positive voltage pulses 342 and a plurality of negative voltage pulses 352 arranged in a staggered manner. For example, the positive voltage pulse 342 has a voltage amplitude of +15 volts and a pulse width of 100 milliseconds. The negative voltage pulse 352 has a voltage amplitude of-15 volts and a pulse width of 100 milliseconds. The number of the positive voltage pulses 342 and the number of the negative voltage pulses 352 may be, for example, 10.
However, the present invention is not limited to the voltage amplitude, the pulse width and the number of the voltage pulses, and the voltage amplitude, the pulse width and the number of the voltage pulses can be designed according to different requirements or types of electrophoretic particles. In the present embodiment, the time length of the first sub-balance signal is greater than the time length of the second sub-balance signal, and the time length of the first sub-mix signal is greater than the time length of the second sub-mix signal. In the present embodiment, the pulse type of the driving signal can refer to the display driving period T3 shown in fig. 3, but the invention is not limited thereto. The pulse type of the driving signal can be determined according to different display driving requirements.
In the present embodiment, the total pulse width of all the positive voltage pulses of the first reset signal, the second reset signal and the driving signal is substantially equal to the total pulse width of all the negative voltage pulses of the first reset signal, the second reset signal and the display driving signal. In other words, after the white electrophoretic particles 112A in the electrophoretic cell 112 are driven by the first reset signal, the second reset signal and the display driving signal provided to the driving substrate 113 through the driving circuit 120, the white electrophoretic particles 112A will be in a charge-neutralized state. Moreover, the display panel 110 will display a white frame corresponding to the driven white electrophoretic particles 112A, and in a preferred embodiment, the color blending value (tint) of the white frame displayed by the display panel 110 will be less than 4. Therefore, the electrophoretic display of the present embodiment can effectively reset the white electrophoretic particles 112A in the electrophoretic cells 112, so that the electrophoretic display 100 can maintain a good white color display effect even after standing for a period of time in a non-horizontal state.
FIG. 4 is a waveform diagram of signals for driving color electrophoretic particles according to an embodiment of the invention. Referring to fig. 1, 2 and 4, for the color electrophoretic particles, the driving circuit 120 may provide a first reset signal (corresponding to the signal waveforms of the balance period T11 'and the mixing period T12') and a second reset signal (corresponding to the signal waveforms of the balance period T21 'and the mixing period T22') of the signal waveforms shown in fig. 4 to the driving substrate 113 to reset the color electrophoretic particles 112B in the electrophoretic cell 112. Also, in the present embodiment, the driving circuit 120 may provide a driving signal (corresponding to the signal waveform of the display driving period T3') having a signal waveform as shown in fig. 4 to the driving substrate 113 to drive the color electrophoretic particles 112B in the electrophoretic cell 112.
In the present embodiment, the first reset signal sequentially includes a first sub-balance signal (corresponding to the signal waveform of the balance period T11 ') and a first sub-mix signal (corresponding to the signal waveform of the mix period T12'). The first sub-balance signal includes a negative voltage pulse 421, a ground voltage pulse 431, a negative voltage pulse 422, and a ground voltage pulse 432, which are arranged in sequence. For example, the negative voltage pulse 421 has a voltage amplitude of-15 volts and a pulse width of 1040 milliseconds. The ground voltage pulse 431 has a voltage amplitude of 0 volts and a pulse width of 400 milliseconds. The negative voltage pulse 422 has a voltage amplitude of-15 volts and a pulse width of 380 milliseconds. The ground voltage pulse 432 has a voltage amplitude of 0 volts and a pulse width of 200 milliseconds. The first sub-mix signal includes a plurality of positive voltage pulses 441 and a plurality of negative voltage pulses 451 that are staggered. For example, the positive voltage pulse 441 has a voltage amplitude of +15 volts and a pulse width of 70 milliseconds. The negative voltage pulse 451 has a voltage amplitude of-15 volts and a pulse width of 70 milliseconds. The number of the positive voltage pulses 441 and the number of the negative voltage pulses 451 may be, for example, 40.
In the present embodiment, the second reset signal includes a second sub-balanced signal (a signal waveform corresponding to the balanced period T21 ') and a second sub-mixed signal (a signal waveform corresponding to the mixed period T22'). The second sub-balance signal includes a negative voltage pulse 423. For example, the negative voltage pulse 423 has a voltage amplitude of-15 volts and a pulse width of 620 milliseconds. The second sub-mix includes a plurality of positive voltage pulses 442 and a plurality of negative voltage pulses 452 interleaved. For example, the positive voltage pulse 442 has a voltage amplitude of +15 volts and a pulse width of 100 milliseconds. The negative voltage pulse 452 has a voltage amplitude of-15 volts and a pulse width of 100 milliseconds. The number of the positive voltage pulses 442 and the number of the negative voltage pulses 452 may be, for example, 10.
However, the present invention is not limited to the voltage amplitude, the pulse width and the number of the voltage pulses, and the voltage amplitude, the pulse width and the number of the voltage pulses can be designed according to different requirements or types of electrophoretic particles. In this embodiment, the time length of the first sub-balance signal is greater than the time length of the second sub-balance signal, and the time length of the first sub-mix signal is greater than the time length of the second sub-mix signal. In the present embodiment, the pulse type of the driving signal can refer to the display driving period T3' shown in fig. 4, but the invention is not limited thereto. The pulse type of the driving signal can be determined according to different display driving requirements.
In the present embodiment, the total pulse width of all the positive voltage pulses of the first reset signal, the second reset signal and the driving signal is substantially equal to the total pulse width of all the negative voltage pulses of the first reset signal, the second reset signal and the display driving signal. In other words, after the color electrophoretic particles 112B in the electrophoretic cell 112 are driven by the first reset signal, the second reset signal and the display driving signal provided to the driving substrate 113 by the driving circuit 120, the color electrophoretic particles 112B will be in a charge-neutralized state. Then, the display panel 110 displays a color screen corresponding to the driven color electrophoretic particles 112A. Therefore, the electrophoretic display of the present embodiment can effectively reset the color electrophoretic particles 112B in the electrophoretic cells 112 and provide a better color display result, so that the electrophoretic display 100 can maintain a good display effect of a specific color (e.g., red or yellow) even after being left for a period of time in a non-horizontal state.
Fig. 5 is a waveform diagram of signals for driving black electrophoretic particles according to an embodiment of the invention. Referring to fig. 1, 2 and 5, for the black electrophoretic particles, the driving circuit 120 may provide a first reset signal (corresponding to the signal waveforms of the balance period T11 ″ and the mixing period T12 ″) and a second reset signal (corresponding to the signal waveforms of the balance period T21 ″ and the mixing period T22 ″) of the signal waveforms shown in fig. 5 to the driving substrate 113 to reset the black electrophoretic particles 112C in the electrophoretic cell 112. Also, the driving circuit 120 may provide a driving signal (a signal waveform corresponding to the display driving period T3 ″) having a signal waveform as shown in fig. 5 to the driving substrate 113 to drive the black electrophoretic particles 112C among the electrophoretic cells 112.
In the present embodiment, the first reset signal sequentially includes a first sub-balance signal (corresponding to the signal waveform of the balance period T11 ") and a first sub-mix signal (corresponding to the signal waveform of the mix period T12"). The first sub-balance signal includes a negative voltage pulse 521, a positive voltage pulse 511, a negative voltage pulse 522, a ground voltage pulse 531, a negative voltage pulse 523, and a ground voltage pulse 532 arranged in sequence. For example, the negative voltage pulse 521 has a voltage amplitude of-15 volts and a pulse width of 200 milliseconds. The positive voltage pulse 511 has a voltage amplitude of +15 volts and a pulse width of 430 milliseconds. The negative voltage pulse 522 has a voltage amplitude of-15 volts and a pulse width of 410 milliseconds. The ground voltage pulse 531 has a voltage amplitude of 0 volts and a pulse width of 400 milliseconds. The negative voltage pulse 523 has a voltage amplitude of-15 volts and a pulse width of 280 milliseconds. The ground voltage pulse 532 has a voltage amplitude of 0 volts and a pulse width of 300 milliseconds. The first sub-mix signal includes a plurality of positive voltage pulses 541 and a plurality of negative voltage pulses 551 alternately arranged. For example, the positive voltage pulse 541 has a voltage amplitude of +15 volts and a pulse width of 70 milliseconds. The negative voltage pulse 551 has a voltage amplitude of-15 volts and a pulse width of 70 milliseconds. The number of the positive voltage pulses 541 and the number of the negative voltage pulses 551 may be, for example, 40.
In the present embodiment, the second reset signal includes a second sub-balanced signal (a signal waveform corresponding to the balanced period T21 ″) and a second sub-mixed signal (a signal waveform corresponding to the mixed period T22 ″). The second sub-balance signal includes negative voltage pulses 524, ground voltage pulses 533, and negative voltage pulses 525 arranged in sequence. For example, the negative voltage pulse 524 has a voltage amplitude of-15 volts and a pulse width of 280 milliseconds. The ground voltage pulse 533 has a voltage amplitude of 0 volt and a pulse width of 240 milliseconds. The negative voltage pulse 525 has a voltage amplitude of-15 volts and a pulse width of 100 milliseconds. The second sub-mix includes a plurality of positive voltage pulses 542 and a plurality of negative voltage pulses 552 that are staggered. For example, the positive voltage pulse 542 has a voltage amplitude of +15 volts and a pulse width of 100 milliseconds. The negative voltage pulse 552 has a voltage amplitude of-15 volts and a pulse width of 100 milliseconds. The number of the positive voltage pulses 542 and the number of the negative voltage pulses 552 may be, for example, 10.
However, the present invention is not limited to the voltage amplitude, the pulse width and the number of the voltage pulses, and the voltage amplitude, the pulse width and the number of the voltage pulses can be designed according to different requirements or types of electrophoretic particles. In this embodiment, the time length of the first sub-balance signal is greater than the time length of the second sub-balance signal, and the time length of the first sub-mix signal is greater than the time length of the second sub-mix signal. In the present embodiment, the pulse type of the driving signal refers to the display driving period T3 "in fig. 5, but the invention is not limited thereto. The pulse type of the driving signal can be determined according to different display driving requirements.
In the present embodiment, the total pulse width of all the positive voltage pulses of the first reset signal, the second reset signal and the driving signal is equal to the total pulse width of all the negative voltage pulses of the first reset signal, the second reset signal and the display driving signal. In other words, after the black electrophoretic particles 112C in the electrophoretic cell 112 are driven by the first reset signal, the second reset signal and the display driving signal provided to the driving substrate 113 through the driving circuit 120, the black electrophoretic particles 112C will be in a charge-neutralized state. The display panel 110 displays a color screen corresponding to the driven black electrophoretic particles 112C. Therefore, the electrophoretic display 100 of the present embodiment can effectively reset the black electrophoretic particles 112C in the electrophoretic cells 112 and provide a better black display result, so that the electrophoretic display 100 can maintain a good black color display effect even after standing for a period of time in a non-horizontal state.
Referring to fig. 1 to 5, in a further detail, when the electrophoretic cell 112 is actually driven to display white, black or a specific color (for example, red or yellow) on the display side S1, the driving circuit 120 provides all the reset signals of fig. 3 to 5 to the driving substrate 113 (combines the voltage signals of the pulse waveforms of the reset signals of fig. 3 to 5) in the reset phase, so as to reset the white electrophoretic particles 112A, the color electrophoretic particles 112B and the black electrophoretic particles 112C in the electrophoretic cell 112. It should be noted that the voltages of fig. 3 to 5 do not correspond to each other in time, but the first sub-balance signal, the first sub-mix signal, the second sub-balance signal and the second sub-mix signal of fig. 3 to 5 are sequentially provided to the driving substrate 113, so that the white electrophoretic particles 112A, the color electrophoretic particles 112B and the black electrophoretic particles 112C can be uniformly distributed in the electrophoretic cell 112.
Then, the driving circuit 120 provides the driving signal of at least one of fig. 3 to fig. 5 to the driving substrate 113 in the display driving stage to reset at least one of the white electrophoretic particles 112A, the color electrophoretic particles 112B and the black electrophoretic particles 112C in the electrophoretic cell 112, so that at least one of the white electrophoretic particles 112A, the color electrophoretic particles 112B and the black electrophoretic particles 112C can be stacked on the display side S1 of the electrophoretic cell 112. Therefore, the electrophoretic display 100 of the present embodiment can provide good display effect. In particular, for the white electrophoretic particles, the electrophoretic display 100 after being reset can still maintain a better display effect of the white color even after being left for a period of time in a non-horizontal state, i.e., the white portion is less mixed with other colors, and the white color is not reddish or yellowish.
FIG. 6 is a diagram illustrating the effect of displaying a white image on the display panel after being reset and non-horizontally standing for 24 hours according to an embodiment of the invention. Referring to fig. 6, fig. 6 is experimental data of color mixture values of a white display screen after driving the white electrophoretic display particles in the electrophoretic cells by using the first reset signal, the second reset signal and the display driving signal of the embodiment of fig. 3. It should be noted that a higher color mixture value (WS-a) indicates a higher degree of inclusion of other colors, and a lower color mixture value indicates a lower degree of inclusion of other colors. And when the display picture displays white color and stands still for a period of time, if the color mixing value is lower than 4, the display picture still keeps the display result with better white color.
In fig. 6, most of the color mixture values of the electrophoretic samples B1-B6 using the conventional driving method are high, and most of the color mixture values of the electrophoretic samples a 1-a 6 using the driving method of the present invention are low. It is noted that the color mixture values of samples A1-A6 are all lower than samples B1-B6, and the color mixture values of samples A1-A6 are all lower than 4. That is to say, the electrophoretic display of the present embodiment is driven by the reset and display operations described in the embodiment of fig. 3, and after standing for a period of time, the display panel of the electrophoretic display of the present embodiment can provide a good display result of white color.
Fig. 7 is a flow chart of a driving method according to an embodiment of the invention. Referring to fig. 1, fig. 2 and fig. 7, the driving method of fig. 7 may be at least used for the electrophoretic display 100 of the embodiment of fig. 1 and fig. 2. In step S710, the driving circuit 120 provides a first reset signal to the driving substrate 113 during the reset period to reset the plurality of electrophoretic particles 112A to 112C in the electrophoretic cell 112 by a first sub-balance signal and a first sub-mix signal of the first reset signal in sequence. In step S720, the driving circuit 120 provides a second reset signal to the driving substrate 113 during the reset period to reset the plurality of electrophoretic particles 112A to 112C in the electrophoretic cell by a second sub-balance signal and a second sub-mix signal of the second reset signal sequentially. In the present embodiment, the time length of the first sub-balance signal is greater than the time length of the second sub-balance signal, and the time length of the first sub-mix signal is greater than the time length of the second sub-mix signal. In step S730, the driving circuit 120 provides a driving signal to the driving substrate 113 during the display driving period to drive at least one of the plurality of electrophoretic particles 112A to 112C in the electrophoretic cell 112, so that the display panel displays a color corresponding to the driven electrophoretic particles. Therefore, the electrophoretic display 100 of the present embodiment can maintain a good display effect even after being left standing for a period of time in a non-horizontal state.
In addition, for other device features, implementation details and technical features of the electrophoretic display 100 of the present embodiment, reference may be made to the description of the embodiments in fig. 1 to 6 for sufficient teaching, suggestion and implementation description, and thus, no further description is provided.
In summary, the electrophoretic display and the driving method thereof of the present invention can effectively reset the distribution positions of the plurality of electrophoretic particles in the electrophoretic cell by two-stage balance and hybrid interlace driving, so that the reset electrophoretic cell is driven to display, and after standing for a period of time in a non-horizontal state, the electrophoretic cell still maintains good display quality of white, black or a specific color. Therefore, the electrophoretic display can provide good user experience effect.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910462404.5A CN112017599B (en) | 2019-05-30 | 2019-05-30 | Electrophoretic display and driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910462404.5A CN112017599B (en) | 2019-05-30 | 2019-05-30 | Electrophoretic display and driving method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112017599A CN112017599A (en) | 2020-12-01 |
| CN112017599B true CN112017599B (en) | 2021-10-08 |
Family
ID=73501761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910462404.5A Active CN112017599B (en) | 2019-05-30 | 2019-05-30 | Electrophoretic display and driving method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112017599B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3119532C (en) | 2018-12-30 | 2023-06-27 | E Ink California, Llc | Electro-optic displays |
| KR102850928B1 (en) | 2020-06-05 | 2025-08-26 | 이 잉크 코포레이션 | Electrophoretic display device |
| WO2021247816A1 (en) | 2020-06-05 | 2021-12-09 | E Ink California, Llc | Methods for achieving color states of lesser-charged particles in electrophoretic medium including at least four types of particles |
| CN113380201B (en) * | 2021-06-22 | 2023-06-30 | 北京京东方光电科技有限公司 | Electronic paper display screen, display control method thereof and electronic paper display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1791899A (en) * | 2003-05-16 | 2006-06-21 | 皇家飞利浦电子股份有限公司 | Electrophoretic display panel |
| CN1823359A (en) * | 2003-07-14 | 2006-08-23 | 皇家飞利浦电子股份有限公司 | Electrophoretic display panel |
| CN103137076A (en) * | 2011-12-05 | 2013-06-05 | 上海天马微电子有限公司 | Bistable display device and driving circuit and driving method thereof |
| CN103676395A (en) * | 2012-09-14 | 2014-03-26 | Nlt科技股份有限公司 | Electrophoretic display device and driving method thereof |
| CN103996381A (en) * | 2013-02-18 | 2014-08-20 | 精工爱普生株式会社 | Method of driving electrophoretic display device, control circuit of electrophoretic display device, electrophoretic display device, and electronic apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201035942A (en) * | 2009-03-18 | 2010-10-01 | Chunghwa Picture Tubes Ltd | Method for driving an electrophoretic display device |
-
2019
- 2019-05-30 CN CN201910462404.5A patent/CN112017599B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1791899A (en) * | 2003-05-16 | 2006-06-21 | 皇家飞利浦电子股份有限公司 | Electrophoretic display panel |
| CN1823359A (en) * | 2003-07-14 | 2006-08-23 | 皇家飞利浦电子股份有限公司 | Electrophoretic display panel |
| CN103137076A (en) * | 2011-12-05 | 2013-06-05 | 上海天马微电子有限公司 | Bistable display device and driving circuit and driving method thereof |
| CN103676395A (en) * | 2012-09-14 | 2014-03-26 | Nlt科技股份有限公司 | Electrophoretic display device and driving method thereof |
| CN103996381A (en) * | 2013-02-18 | 2014-08-20 | 精工爱普生株式会社 | Method of driving electrophoretic display device, control circuit of electrophoretic display device, electrophoretic display device, and electronic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112017599A (en) | 2020-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI702459B (en) | Electrophoretic display and driving method thereof | |
| CN112017599B (en) | Electrophoretic display and driving method thereof | |
| US10591800B2 (en) | Electrophoretic display and driving method thereof | |
| CN110010080B (en) | Electrophoretic display and driving method thereof | |
| CN110780505B (en) | Electronic paper display device and driving method thereof | |
| US9019318B2 (en) | Driving methods for electrophoretic displays employing grey level waveforms | |
| US8698851B2 (en) | Method of driving display panel and display apparatus for performing the same | |
| CN109074781B (en) | Method for driving an electro-optical display | |
| US11151951B2 (en) | Electro-phoretic display and driving method thereof | |
| US8558855B2 (en) | Driving methods for electrophoretic displays | |
| CN100435017C (en) | Electrophoretic display device and driving method thereof | |
| EP2696336B1 (en) | Liquid crystal display driving circuit, driving method thereof and liquid crystal display | |
| Kao et al. | Driving method of three-particle electrophoretic displays | |
| CN104808406B (en) | A kind of substrate and its liquid crystal display device | |
| CN110313027B (en) | Driver for providing DC balance update sequence for color electrophoretic display | |
| CN106920525B (en) | Driving method of three-grid driving structure liquid crystal display | |
| JP5317007B2 (en) | Electro-optical device, driving method of electro-optical device, and electronic apparatus | |
| CN106531096A (en) | Driving method of RGBW four-primary-color display panel | |
| CN109637493B (en) | Driving method and device of display panel | |
| JP5445310B2 (en) | Electrophoretic display device, control circuit, electronic apparatus, and driving method | |
| JP2020507133A (en) | Driving method of liquid crystal display panel | |
| US12190835B2 (en) | Electronic paper display apparatus, driving method thereof and computer-readable storage medium | |
| CN109949762B (en) | Pixel matrix driving method and display device | |
| CN116741117B (en) | Display panel and driving method thereof | |
| CN109859712A (en) | The driving method of display panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |