Electrophoretic display and method of driving the same

Abstract

This application discloses an electrophoretic display and its driving method. The electrophoretic display includes: a display panel and a driving circuit; the display panel includes a plurality of electrophoretic particles of different colors and a driving substrate, the driving substrate being disposed below the plurality of electrophoretic particles; the driving circuit is coupled to the driving substrate for driving the display panel. In a balancing phase, the driving circuit provides a balancing pulse to the driving substrate to balance the charge of the plurality of electrophoretic particles; in an oscillation phase, it sequentially provides a plurality of first oscillation pulses, a plurality of second oscillation pulses, and a plurality of third oscillation pulses to the driving substrate to mix the plurality of electrophoretic particles, wherein the pulse width of the first oscillation pulse is greater than the pulse width of the second oscillation pulse, and the pulse width of the second oscillation pulse is greater than the pulse width of the third oscillation pulse; in a display phase, it provides a driving pulse to the driving substrate to drive the plurality of electrophoretic particles, causing the display panel to display the color of the corresponding plurality of electrophoretic particles after driving. Therefore, power consumption can be reduced.

Description

Technical Field

[0001] This application relates to a display technology, and more particularly to an electrophoretic display and its driving method. Background Technology

[0002] With the advancement of electronic technology, electrophoretic displays are widely used in various display applications and electronic devices. An electrophoretic display comprises multiple microcup structures or microcapsules. It uses an electric field to drive multiple electrophoretic particles within the microcup or microcapsule structure to move up and down, causing externally incident light to be reflected or absorbed, thus displaying an image. However, many uncertainties arise during the movement of these multiple electrophoretic particles, such as collisions between particles, uneven force due to particle size variations, and insufficient particle movement distance. These factors can lead to a less clear image displayed by the electrophoretic display.

[0003] To address the aforementioned issues, electrophoretic displays can use logically set oscillating pulses during electric field control waveform configuration to evenly disperse multiple electrophoretic particles, cleaning the previous image and ensuring that each particle remains in its original state before displaying the next image, thus avoiding image ghosting. However, current driving methods increase the power consumption of electrophoretic displays.

[0004] Therefore, how to provide a low-power electrophoretic display and its driving method is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This application provides an electrophoretic display and its driving method, which can solve the problem of increased power consumption caused by setting multiple oscillating pulses in the prior art to avoid image ghosting in electrophoretic displays.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] In a first aspect, this application provides an electrophoretic display, comprising: a display panel and a driving circuit. The display panel includes a plurality of electrophoretic particles of different colors and a driving substrate, the driving substrate being disposed below the plurality of electrophoretic particles. The driving circuit is coupled to the driving substrate for driving the display panel, wherein, in a balancing phase, the driving circuit provides a balancing pulse to the driving substrate to balance the charge of the plurality of electrophoretic particles; in an oscillation phase, the driving circuit sequentially provides a plurality of first oscillation pulses, a plurality of second oscillation pulses, and a plurality of third oscillation pulses to the driving substrate to mix the plurality of electrophoretic particles, wherein the pulse width of the first oscillation pulse is greater than the pulse width of the second oscillation pulse, and the pulse width of the second oscillation pulse is greater than the pulse width of the third oscillation pulse; in a display phase, the driving circuit provides a driving pulse to the driving substrate to drive the plurality of electrophoretic particles, such that the display panel displays the color of the plurality of electrophoretic particles after driving.

[0008] Secondly, this application provides a driving method applicable to an electrophoretic display including a display panel and a driving circuit. The driving method includes: the driving circuit providing a balancing pulse to a driving substrate included in the display panel during a balancing phase to balance the charges of multiple electrophoretic particles of different colors included in the display panel; the driving circuit sequentially providing multiple first oscillating pulses, multiple second oscillating pulses, and multiple third oscillating pulses to the driving substrate during an oscillation phase to mix the multiple electrophoretic particles, wherein the pulse width of the first oscillating pulse is greater than the pulse width of the second oscillating pulse, and the pulse width of the second oscillating pulse is greater than the pulse width of the third oscillating pulse; and the driving circuit providing a driving pulse to the driving substrate during a display phase to drive the multiple electrophoretic particles, such that the display panel displays the colors of the driven multiple electrophoretic particles.

[0009] In this embodiment of the application, by providing multiple first oscillating pulses, multiple second oscillating pulses and multiple third oscillating pulses with gradually decreasing pulse widths in sequence during the oscillation phase, the number of oscillating pulses included in the oscillation phase can be reduced, thereby reducing the power consumption of the electrophoretic display. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0011] Figure 1 This is a block diagram of an embodiment of the electrophoretic display according to this application;

[0012] Figure 2 for Figure 1 A schematic diagram of an embodiment of the display panel;

[0013] Figure 3 for Figure 1 A schematic diagram of another embodiment of the display panel;

[0014] Figure 4 This is a waveform diagram of the signal driving the first electrophoretic particle according to an embodiment of the electrophoretic display of this application;

[0015] Figure 5 This is a waveform diagram of the signal driving a second electrophoretic particle according to an embodiment of the electrophoretic display of this application;

[0016] Figure 6 A signal waveform diagram of driving a third electrophoretic particle according to an embodiment of the electrophoretic display of this application; and

[0017] Figure 7 This is a flowchart of an embodiment of the driving method according to this application. Detailed Implementation

[0018] The embodiments of the present invention will be described below with reference to the accompanying drawings. In these drawings, the same reference numerals denote the same or similar components or method flows.

[0019] It must be understood that the use of terms such as "comprising" or "including" in this specification is intended to indicate the presence of specific technical features, values, method steps, work processes and / or components, but does not preclude the addition of more technical features, values, method steps, work processes, components, or any combination thereof.

[0020] It is important to understand that when a component is described as "connected" or "coupled" to another component, it can be a direct connection or coupling to other components, and there may be intermediate components. Conversely, when a component is described as "directly connected" or "directly coupled" to another component, there are no intermediate components.

[0021] Please see Figure 1 and Figure 2 , Figure 1 This is a block diagram of an embodiment of the electrophoretic display according to this application. Figure 2 for Figure 1 A schematic diagram of an embodiment of the display panel. (See attached diagram.) Figure 1 and Figure 2As shown, the electrophoresis display 100 includes a display panel 110 and a driving circuit 120, with the driving circuit 120 coupled to the display panel 110. In this embodiment, the electrophoretic display 100 is a color electrophoretic display; the display panel 110 may be a microcapsule electrophoretic panel, and the display panel 110 may include multiple pixels, and the multiple pixels respectively correspond to multiple microcapsules 112 arranged in an array. Each microcapsule 112 includes multiple electrophoretic particles of different colors. The multiple electrophoretic particles may include multiple first electrophoretic particles 52, multiple second electrophoretic particles 54 and multiple third electrophoretic particles 56. The first electrophoretic particles 52 may be white electrophoretic particles, the second electrophoretic particles 54 may be black electrophoretic particles, and the third electrophoretic particles 56 may be colored electrophoretic particles (e.g., red electrophoretic particles or yellow electrophoretic particles). The driving circuit 120 drives the multiple first electrophoretic particles 52, multiple second electrophoretic particles 54 and multiple third electrophoretic particles 56 included in each microcapsule 112 to move by applying voltage, so that each pixel of the display panel 110 can display black, white, grayscale or a specific color respectively.

[0022] It should be noted that, in order to avoid Figure 2 The diagram is too complex; only... Figure 2 Three microcapsules 112 are drawn in the display panel 110. Each microcapsule 112 contains only three first electrophoretic particles 52, three second electrophoretic particles 54, and three third electrophoretic particles 56. The actual number of microcapsules 112 included in the display panel 110 and the actual number of first electrophoretic particles 52, second electrophoretic particles 54, and third electrophoretic particles 56 included in each microcapsule 112 can be adjusted according to actual requirements. Furthermore, when the display panel 110 is changed to a microcup electrophoresis panel, [the following can be added]: Figure 2 The microcapsule 112 is changed to a microcup structure 113, such as Figure 3 As shown, Figure 3 for Figure 1 A schematic diagram of another embodiment of the display panel.

[0023] Please see Figure 2 In this embodiment, the display panel 110 includes not only a plurality of microcapsules 112, but also an upper electrode layer 114 and a driving substrate 116. The plurality of microcapsules 112 are disposed between the upper electrode layer 114 and the driving substrate 116 (i.e., the driving substrate 116 is disposed below the plurality of electrophoretic particles), and the display side of the microcapsules 112 is close to the upper electrode layer 114. The upper electrode layer 114 may be a transparent electrode layer. The driving substrate 116 may include a plurality of driving transistors (not shown) for receiving signals from the driving circuit 120 to drive a plurality of first electrophoretic particles 52, a plurality of second electrophoretic particles 54, and a plurality of third electrophoretic particles 56 to move within the microcapsules 112 (i.e., the driving circuit 120 is coupled to the driving substrate 116 to drive the display panel 110).

[0024] Please see below Figure 1 and Figure 2 and respectively paired Figures 4 to 6 Each of the various signal waveforms used to drive the first electrophoretic particle 52, the second electrophoretic particle 54, and the third electrophoretic particle 56 is described separately. Figures 4 to 6 The images show signal waveforms driving a first electrophoretic particle, a second electrophoretic particle, and a third electrophoretic particle, respectively, according to an embodiment of the electrophoretic display of this application. It should be noted that... Figures 4 to 6 During the time period for displaying each frame, the electrophoretic display 100 drives various signal waveforms of the first electrophoretic particle 52, the second electrophoretic particle 54, and the third electrophoretic particle 56. Therefore, the time period for displaying each frame sequentially includes a balancing phase T1', an oscillation phase T2', and a display phase T3'. The balancing phase T1' is used to balance the charges of the multiple first electrophoretic particles 52, multiple second electrophoretic particles 54, and multiple third electrophoretic particles 56 displayed in the previous frame. The oscillation phase T2' is used to evenly disperse the multiple first electrophoretic particles 52, multiple second electrophoretic particles 54, and multiple third electrophoretic particles 56. The display phase T3' is used to display the current frame according to display requirements.

[0025] During the balancing phase T1', the driving circuit 120 provides balancing pulses to the driving substrate 116 to balance the charges of the plurality of electrophoretic particles (i.e., the plurality of first electrophoretic particles 52, the plurality of second electrophoretic particles 54, and the plurality of third electrophoretic particles 56 within the microcapsule 112). Specifically, the driving circuit 120 can provide a second positive voltage pulse PP2 and a sixth negative voltage pulse NP6 arranged in sequence to the driving substrate 116 to balance the charges of the plurality of first electrophoretic particles 52 within the microcapsule 112 (e.g., ...). Figure 4 As shown), the voltage amplitude of the second positive voltage pulse PP2 is equal to the voltage amplitude of the sixth negative voltage pulse NP6. The voltage amplitude of the second positive voltage pulse PP2 can be +15 volts to +20 volts, and the voltage amplitude of the sixth negative voltage pulse NP6 can be, but is not limited to, -15 volts to -20 volts. The driving circuit 120 can provide the fourth negative voltage pulse NP4, the third ground voltage pulse GP3, and the fifth negative voltage pulse NP5 arranged in sequence to the driving substrate 116 to balance the charge of the multiple second electrophoretic particles 54 in the microcapsule 112 (e.g., ...). Figure 5As shown), the voltage amplitude of the fourth negative voltage pulse NP4 is equal to the voltage amplitude of the fifth negative voltage pulse NP5. The voltage amplitudes of the fourth negative voltage pulse NP4 and the fifth negative voltage pulse NP5 can be, but are not limited to, -15 volts to -20 volts, and the voltage amplitude of the third ground voltage pulse GP3 can be 0 volts. The driving circuit 120 can provide the second negative voltage pulse NP2, the second ground voltage pulse GP2, and the third negative voltage pulse NP3 arranged in sequence to the driving substrate 116 to balance the charge of the multiple third electrophoretic particles 56 in the microcapsule 112 (e.g., ...). Figure 6 As shown), the voltage amplitude of the second negative voltage pulse NP2 is equal to the voltage amplitude of the third negative voltage pulse NP3. The voltage amplitudes of the second negative voltage pulse NP2 and the third negative voltage pulse NP3 can be, but are not limited to, -15 volts to -20 volts, and the voltage amplitude of the second ground voltage pulse GP2 can be 0 volts.

[0026] Next, in the oscillation phase T2', the driving circuit 120 sequentially provides multiple first oscillation pulses SP1, multiple second oscillation pulses SP2, and multiple third oscillation pulses SP3 to the driving substrate 116 to mix the multiple electrophoretic particles (that is, to uniformly disperse the multiple first electrophoretic particles 52, multiple second electrophoretic particles 54, and multiple third electrophoretic particles 56 within the microcapsule 112). The pulse width of the first oscillation pulse SP1 is greater than the pulse width of the second oscillation pulse SP2, and the pulse width of the second oscillation pulse SP2 is greater than the pulse width of the third oscillation pulse SP3 (e.g., ...). Figures 4 to 6 (As shown). In this embodiment, the first oscillating pulse SP1, the second oscillating pulse SP2, and the third oscillating pulse SP3 each include a plurality of positive pulse signals to drive the first electrophoretic particle 52, and the first oscillating pulse SP1, the second oscillating pulse SP2, and the third oscillating pulse SP3 each include a plurality of negative pulse signals to drive the second electrophoretic particle 54 and the third electrophoretic particle 56; the positive and negative pulse signals included in the first oscillating pulse SP1 may have the same voltage amplitude and pulse width; the positive and negative pulse signals included in the second oscillating pulse SP2 may have the same voltage amplitude and pulse width; the positive and negative pulse signals included in the third oscillating pulse SP3 may have the same voltage amplitude and pulse width.

[0027] Finally, in the display stage T3', the driving circuit 120 provides a driving pulse to the driving substrate 116 to drive the plurality of electrophoretic particles (i.e., the plurality of first electrophoretic particles 52, the plurality of second electrophoretic particles 54, and the plurality of third electrophoretic particles 56 within the microcapsule 112). Therefore, in the display stage T3', the driving circuit 120 enables the display panel 110 to display colors corresponding to the driven plurality of first electrophoretic particles 52, the plurality of second electrophoretic particles 54, and the plurality of third electrophoretic particles 56.

[0028] During the oscillation phase T2', the driving circuit 120 sequentially provides multiple first oscillation pulses SP1, multiple second oscillation pulses SP2, and multiple third oscillation pulses SP3 with gradually decreasing pulse widths to the driving substrate 116 to mix multiple first electrophoretic particles 52, multiple second electrophoretic particles 54, and multiple third electrophoretic particles 56 within the microcapsule 112. During the oscillation phase T2', the number of oscillation pulses in the oscillation phase T2' is reduced by utilizing multiple first oscillation pulses SP1 with large pulse widths, thereby reducing the power consumption of the electrophoretic display 100.

[0029] It should be noted that the waveforms of the balancing pulse used to balance the charges of the first electrophoretic particle 52, the second electrophoretic particle 54, and the third electrophoretic particle 56, as well as the waveforms of the driving pulse used to drive the first electrophoretic particle 52, the second electrophoretic particle 54, and the third electrophoretic particle 56, can be adjusted according to actual needs.

[0030] In one embodiment, the display phase T3' includes a first driving period DP1, a second driving period DP2, and a third driving period DP3 arranged in sequence, with the first driving period DP1 following the oscillation phase T2'. During the first driving period DP1, the driving circuit 120 can provide multiple first negative voltage pulses NP1 to the driving substrate 116 to drive multiple first electrophoretic particles 52 (e.g., ...) within the microcapsule 112. Figure 4 As shown), the driving circuit 120 can provide multiple first positive voltage pulses PP1 to the driving substrate 116 to drive multiple second electrophoretic particles 54 (as shown) within the microcapsule 112. Figure 5 As shown), the driving circuit 120 can provide a first ground voltage pulse GP1 to the driving substrate 116 to provide a first ground voltage to the plurality of third electrophoretic particles 56 (e.g., as shown) within the microcapsule 112. Figure 6 (As shown). The voltage amplitude of the first negative voltage pulse NP1 can be, but is not limited to, -15 volts to -20 volts; the voltage amplitude of the first positive voltage pulse PP1 can be, but is not limited to, +15 volts to +20 volts; and the voltage amplitude of the first ground voltage pulse GP1 can be 0 volts. Since the first electrophoretic particle 52 can be a negatively charged white electrophoretic particle, the second electrophoretic particle 54 can be a positively charged black electrophoretic particle, and the third electrophoretic particle 56 can be a positively charged colored electrophoretic particle, and the charge of the third electrophoretic particle 56 is lower than that of the second electrophoretic particle 54, the waveform design of DP1 during the first drive period can reset the first electrophoretic particle 52 and the second electrophoretic particle 54.

[0031] During the second driving period DP2, the driving circuit 120 can provide a fourth ground voltage pulse GP4 to the driving substrate 116 to provide a fourth ground voltage to the plurality of first electrophoretic particles 52 (e.g., ...) within the microcapsule 112. Figure 4As shown), the driving circuit 120 can provide a fifth ground voltage pulse GP5 to the driving substrate 116 to provide a fifth ground voltage to the plurality of second electrophoretic particles 54 within the microcapsule 112 (e.g., as shown). Figure 5 As shown), the driving circuit 120 can provide interleaved seventh negative voltage pulses NP7 and third positive voltage pulses PP3 to the driving substrate 116 to drive multiple third electrophoretic particles 56 (as shown) within the microcapsule 112. Figure 6 (As shown). The voltage amplitudes of the fourth ground voltage pulse GP4 and the fifth ground voltage pulse GP5 can be 0 volts, the voltage amplitude of the seventh negative voltage pulse NP7 can be, but is not limited to, -15 volts to -20 volts, and the voltage amplitude of the third positive voltage pulse PP3 can be, but is not limited to, +5 volts to +10 volts. Since the first electrophoretic particle 52 can be a negatively charged white electrophoretic particle, the second electrophoretic particle 54 can be a positively charged black electrophoretic particle, and the third electrophoretic particle 56 can be a positively charged colored electrophoretic particle, and the charge of the third electrophoretic particle 56 is lower than that of the second electrophoretic particle 54, the waveform design of DP2 during the second driving period allows the third electrophoretic particle 56 to be effectively pushed to the display side of the microcapsule 112.

[0032] During the third driving period DP3, the driving circuit 120 can provide a sixth ground voltage pulse GP6 to the driving substrate 116 to provide a sixth ground voltage to the plurality of first electrophoretic particles 52 (e.g., ...) within the microcapsule 112. Figure 4 As shown), the driving circuit 120 can provide multiple fourth positive voltage pulses PP4 to the driving substrate 116 to drive multiple second electrophoretic particles 54 (as shown) within the microcapsule 112. Figure 5 As shown), the driving circuit 120 can provide a fifth positive voltage pulse PP5 to the driving substrate 116 to drive a plurality of third electrophoretic particles 56 within the microcapsule 112 (e.g., ...). Figure 6 (as shown); wherein, the voltage amplitude of the sixth ground voltage pulse GP6 can be 0 volts, the voltage amplitude of the fourth positive voltage pulse PP4 can be, but is not limited to, +15 volts to +20 volts, and the voltage amplitude of the fifth positive voltage pulse PP5 can be, but is not limited to, +5 volts to +10 volts. Since the first electrophoretic particle 52 can be a negatively charged white electrophoretic particle, the second electrophoretic particle 54 can be a positively charged black electrophoretic particle, and the third electrophoretic particle 56 can be a positively charged colored electrophoretic particle, and the charge of the third electrophoretic particle 56 is lower than that of the second electrophoretic particle 54, the waveform design of DP3 during the third drive period can effectively push the second electrophoretic particle 54 and the third electrophoretic particle 56 to the display side of the microcapsule 112.

[0033] To reduce the effect of "ghosting", the frequency of the driving pulse used to drive the first electrophoretic particle 52 and the second electrophoretic particle 54 during the first driving period DP1 can be increased. Specifically, during the oscillation phase T2', multiple wide first oscillation pulses SP1 are used to reduce the number of oscillation pulses in the oscillation phase T2', thereby reducing power consumption. To balance the ghosting effect caused by this modification, the pulse frequency or number of pulses of the first positive voltage pulse PP1 and the first negative voltage pulse NP1 in DP1 during the first driving period is increased (that is, the driving circuit 120 adjusts the frequency of the multiple first positive voltage pulses PP1 according to the pulse width of the first oscillation pulse SP1, and the frequency of the multiple first positive voltage pulses PP1 is equal to the frequency of the multiple first negative voltage pulses NP1). In the first driving period, the ratio of the increase in frequency of the first positive voltage pulse PP1 and the first negative voltage pulse NP1 in DP1 is proportional to the ratio of the increase in pulse width of the first oscillation pulse SP1 in the oscillation stage T2'. This ratio is adjusted between 1:1 and 10:1. It should be noted that the frequency of the first positive voltage pulse PP1 and the first negative voltage pulse NP1 cannot be greater than the screen update frequency of the electrophoretic display 100.

[0034] Please see Figure 7 This is a flowchart of an embodiment of the driving method according to this application. For ease of explanation, Figure 7 The driving method will be combined with Figure 1 and Figure 2 Electrophoresis display 100 and Figures 4 to 6 The various signal waveforms used to drive the first electrophoretic particle 52, the second electrophoretic particle 54, and the third electrophoretic particle 56 are explained. For example... Figure 7 As shown, the driving method includes the following steps: In the balancing phase T1', the driving circuit 120 provides a balancing pulse to the driving substrate 116 included in the display panel 110 to balance the charges of multiple electrophoretic particles of different colors included in the display panel 110 (step 210); In the oscillation phase T2', the driving circuit 120 sequentially provides multiple first oscillation pulses SP1, multiple second oscillation pulses SP2, and multiple third oscillation pulses SP3 to the driving substrate 116 to mix the multiple electrophoretic particles, wherein the pulse width of the first oscillation pulse SP1 is greater than the pulse width of the second oscillation pulse SP2, and the pulse width of the second oscillation pulse SP2 is greater than the pulse width of the third oscillation pulse SP3 (step 220); and In the display phase T3', the driving circuit 120 provides a driving pulse to the driving substrate 116 to drive the multiple electrophoretic particles, causing the display panel 110 to display the colors of the corresponding multiple electrophoretic particles after driving (step 230).

[0035] In one embodiment, the plurality of electrophoretic particles includes: a plurality of first electrophoretic particles 52 (i.e., white electrophoretic particles), a plurality of second electrophoretic particles 54 (i.e., black electrophoretic particles), and a plurality of third electrophoretic particles 56 (i.e., colored electrophoretic particles). See also... Figures 4 to 6 Step 210 may include: the driving circuit 120 providing a second negative voltage pulse NP2, a second ground voltage pulse GP2 and a third negative voltage pulse NP3 arranged in sequence to the driving substrate 116 to balance the charge of a plurality of third electrophoretic particles 56; the driving circuit 120 providing a fourth negative voltage pulse NP4, a third ground voltage pulse GP3 and a fifth negative voltage pulse NP5 arranged in sequence to the driving substrate 116 to balance the charge of a plurality of second electrophoretic particles 54; and the driving circuit 120 providing a second positive voltage pulse PP2 and a sixth negative voltage pulse NP6 arranged in sequence to the driving substrate 116 to balance the charge of a plurality of first electrophoretic particles 52.

[0036] In one embodiment, the plurality of electrophoretic particles includes: a plurality of first electrophoretic particles 52 (i.e., white electrophoretic particles), a plurality of second electrophoretic particles 54 (i.e., black electrophoretic particles), and a plurality of third electrophoretic particles 56 (i.e., colored electrophoretic particles). The display phase T3' includes a first driving period DP1, a second driving period DP2, and a third driving period DP3 arranged in sequence, with the first driving period DP1 following the oscillation phase T2'. Please refer to [link to relevant documentation]. Figures 4 to 6 Step 230 may include: the driving circuit 120 providing a plurality of first positive voltage pulses PP1 to the driving substrate 116 during the first driving period DP1 to drive a plurality of second electrophoretic particles 54; the driving circuit 120 providing a plurality of first negative voltage pulses NP1 to the driving substrate 116 during the first driving period DP1 to drive a plurality of first electrophoretic particles 52.

[0037] In one embodiment, in order to reduce the effect of ghosting, Figure 7 Step 230 of the driving method may further include: the driving circuit 120 adjusting the frequency of a plurality of first positive voltage pulses PP1 according to the pulse width of the first oscillating pulse SP1, wherein the frequency of the plurality of first positive voltage pulses PP1 is equal to the frequency of the plurality of first negative voltage pulses NP1.

[0038] Please refer to Table 1 below, which shows the driving methods of existing electrophoretic displays in the following scenarios: displaying three colors in three blocks (i.e., the first block displays the color of white electrophoretic particles, the second block displays the color of black electrophoretic particles, and the third block displays the color of colored electrophoretic particles), displaying the three colors in a combined graphic and text format, and displaying only black and white stripes. Figure 7 The average power consumption (in milliwatts (mW)) used by the driving method. Table 1 shows that... Figure 7The driving method allows for lower power consumption of the electrophoretic display 100.

[0039] Table 1

[0040]

[0041] In summary, in this embodiment, by sequentially providing multiple first oscillating pulses, multiple second oscillating pulses, and multiple third oscillating pulses with gradually decreasing pulse widths to the driving substrate during the oscillation phase, the multiple first electrophoretic particles, multiple second electrophoretic particles, and multiple third electrophoretic particles within the microcapsules can be mixed. This reduces the number of oscillating pulses included in the oscillation phase, thereby reducing the power consumption of the electrophoretic display. Furthermore, by adjusting the frequency of the first positive voltage pulse according to the pulse width of the first oscillating pulse, the effect of ghosting can be reduced.

[0042] Although the components described above are included in the drawings of this application, it is not excluded that more additional components may be used to achieve better technical effects without departing from the spirit of the invention.

[0043] While the present invention has been described using the above embodiments, it should be noted that these descriptions are not intended to limit the invention. Rather, this invention encompasses modifications and similar arrangements that are obvious to those skilled in the art. Therefore, the scope of the claims should be interpreted in the broadest possible sense to include all obvious modifications and similar arrangements.

Claims

1. An electrophoretic display, characterized by include: The display panel includes multiple electrophoretic particles of different colors and a driving substrate, wherein the driving substrate is disposed below the multiple electrophoretic particles; as well as A driving circuit, coupled to the driving substrate, is used to drive the display panel. In a balancing phase, the driving circuit provides a balancing pulse to the driving substrate to balance the charges of the plurality of electrophoretic particles. In an oscillation phase, the driving circuit sequentially provides a plurality of first oscillation pulses, a plurality of second oscillation pulses, and a plurality of third oscillation pulses to the driving substrate to mix the plurality of electrophoretic particles. The pulse width of the first oscillation pulse is greater than the pulse width of the second oscillation pulse, and the pulse width of the second oscillation pulse is greater than the pulse width of the third oscillation pulse. In a display phase, the driving circuit provides a driving pulse to the driving substrate to drive the plurality of electrophoretic particles, causing the display panel to display the colors of the driven plurality of electrophoretic particles. The plurality of electrophoretic particles include: a plurality of first electrophoretic particles, a plurality of second electrophoretic particles, and a plurality of third electrophoretic particles; the display phase includes a first driving period following the oscillation phase; during the first driving period, the driving circuit drives the plurality of second electrophoretic particles through a plurality of first positive voltage pulses and drives the plurality of first electrophoretic particles through a plurality of first negative voltage pulses. The driving circuit adjusts the frequency of the plurality of first positive voltage pulses according to the pulse width of the first oscillating pulse. The frequency of the plurality of first positive voltage pulses is equal to the frequency of the plurality of first negative voltage pulses. The ratio of the increase in frequency of the first positive voltage pulse and the first negative voltage pulse during the first driving period is proportional to the ratio of the increase in pulse width of the first oscillating pulse during the oscillation phase. The frequency of the first positive voltage pulse and the first negative voltage pulse is not greater than the screen update frequency of the electrophoretic display.

2. The electrophoretic display of claim 1, wherein, When the color of the plurality of electrophoretic particles corresponding to the driving is colored, the balancing pulse includes: a second negative voltage pulse, a second ground voltage pulse, and a third negative voltage pulse arranged in sequence.

3. The electrophoretic display of claim 1, wherein, When the color of the plurality of electrophoretic particles corresponding to the driving is black, the balancing pulse includes: a fourth negative voltage pulse, a third ground voltage pulse, and a fifth negative voltage pulse arranged in sequence.

4. The electrophoretic display according to claim 1, characterized in that, When the color of the plurality of electrophoretic particles corresponding to the driving is white, the balancing pulse includes: a second positive voltage pulse and a sixth negative voltage pulse arranged in sequence.

5. A driving method suitable for electrophoretic displays, characterized in that, The electrophoretic display includes a display panel and a driving circuit, and the driving method includes: Step A: During the balancing phase, the driving circuit provides a balancing pulse to the driving substrate included in the display panel to balance the charges of multiple electrophoretic particles of different colors included in the display panel. Step B: During the oscillation phase, the driving circuit sequentially provides multiple first oscillation pulses, multiple second oscillation pulses, and multiple third oscillation pulses to the driving substrate to mix the multiple electrophoretic particles, wherein the pulse width of the first oscillation pulse is greater than the pulse width of the second oscillation pulse, and the pulse width of the second oscillation pulse is greater than the pulse width of the third oscillation pulse; and Step C: During the display stage, the driving circuit provides a driving pulse to the driving substrate to drive the plurality of electrophoretic particles, so that the display panel displays the color of the plurality of electrophoretic particles after being driven. The plurality of electrophoretic particles includes: a plurality of first electrophoretic particles, a plurality of second electrophoretic particles, and a plurality of third electrophoretic particles; the display phase includes a first driving period following the oscillation phase; step C includes: the driving circuit providing a plurality of first positive voltage pulses to the driving substrate during the first driving period to drive the plurality of second electrophoretic particles; the driving circuit providing a plurality of first negative voltage pulses to the driving substrate during the first driving period to drive the plurality of first electrophoretic particles; and the driving circuit adjusting the frequency of the plurality of first positive voltage pulses according to the pulse width of the first oscillation pulse, wherein the frequency of the plurality of first positive voltage pulses is equal to the frequency of the plurality of first negative voltage pulses, the ratio of the increase in frequency of the first positive voltage pulses and the first negative voltage pulses during the first driving period is proportional to the ratio of the increase in pulse width of the first oscillation pulses during the oscillation phase, and the frequency of the first positive voltage pulses and the first negative voltage pulses is not greater than the screen refresh rate of the electrophoretic display.

6. The driving method according to claim 5, characterized in that, The plurality of electrophoretic particles includes: a plurality of first electrophoretic particles, a plurality of second electrophoretic particles, and a plurality of third electrophoretic particles; step A includes: The driving circuit provides a second negative voltage pulse, a second ground voltage pulse, and a third negative voltage pulse arranged in sequence to the driving substrate to balance the charge of the plurality of third electrophoretic particles; The driving circuit provides a fourth negative voltage pulse, a third ground voltage pulse, and a fifth negative voltage pulse arranged in sequence to the driving substrate to balance the charge of the plurality of second electrophoretic particles; and The driving circuit provides a second positive voltage pulse and a sixth negative voltage pulse arranged in sequence to the driving substrate to balance the charge of the plurality of first electrophoretic particles.

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